./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2d41b1dc1d5d7eec1f1fd4e3cbbef0194aa2dded6486a15b383e9bb8fe1468a3 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:20:38,487 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:20:38,554 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-11-24 23:20:38,560 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:20:38,561 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:20:38,586 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:20:38,587 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:20:38,588 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:20:38,588 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:20:38,589 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:20:38,590 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:20:38,590 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:20:38,591 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:20:38,591 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:20:38,592 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:20:38,593 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:20:38,593 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:20:38,594 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:20:38,594 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:20:38,595 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:20:38,595 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:20:38,598 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:20:38,598 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:20:38,599 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:20:38,599 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:20:38,600 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:20:38,600 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:20:38,601 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:20:38,601 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:20:38,601 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:20:38,602 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:20:38,602 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-24 23:20:38,603 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 23:20:38,603 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:20:38,604 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:20:38,604 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:20:38,606 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:20:38,606 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:20:38,607 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:20:38,607 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:20:38,607 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:20:38,608 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:20:38,608 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:20:38,608 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:20:38,609 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:20:38,609 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:20:38,609 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:20:38,610 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:20:38,611 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:20:38,611 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_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2d41b1dc1d5d7eec1f1fd4e3cbbef0194aa2dded6486a15b383e9bb8fe1468a3 [2023-11-24 23:20:38,905 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:20:38,937 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:20:38,939 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:20:38,941 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:20:38,941 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:20:38,943 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c [2023-11-24 23:20:42,085 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:20:42,315 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:20:42,316 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c [2023-11-24 23:20:42,330 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/data/cbf287357/cf6d649c58b74a8984fe22ff52604a15/FLAG05240484e [2023-11-24 23:20:42,347 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/data/cbf287357/cf6d649c58b74a8984fe22ff52604a15 [2023-11-24 23:20:42,350 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:20:42,352 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:20:42,353 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:20:42,354 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:20:42,360 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:20:42,360 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:20:42" (1/1) ... [2023-11-24 23:20:42,362 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46bd0f33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:42, skipping insertion in model container [2023-11-24 23:20:42,362 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:20:42" (1/1) ... [2023-11-24 23:20:42,392 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:20:42,589 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:20:42,603 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:20:42,647 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:20:42,664 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:20:42,665 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:20:42,673 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:20:42,674 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:42 WrapperNode [2023-11-24 23:20:42,674 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:20:42,675 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:20:42,676 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:20:42,676 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:20:42,685 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:42" (1/1) ... [2023-11-24 23:20:42,697 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:42" (1/1) ... [2023-11-24 23:20:42,745 INFO L138 Inliner]: procedures = 27, calls = 74, calls flagged for inlining = 19, calls inlined = 23, statements flattened = 314 [2023-11-24 23:20:42,745 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:20:42,746 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:20:42,746 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:20:42,747 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:20:42,757 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:42" (1/1) ... [2023-11-24 23:20:42,758 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:42" (1/1) ... [2023-11-24 23:20:42,763 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:42" (1/1) ... [2023-11-24 23:20:42,764 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:42" (1/1) ... [2023-11-24 23:20:42,777 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:42" (1/1) ... [2023-11-24 23:20:42,782 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:42" (1/1) ... [2023-11-24 23:20:42,786 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:42" (1/1) ... [2023-11-24 23:20:42,788 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:42" (1/1) ... [2023-11-24 23:20:42,793 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:20:42,794 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:20:42,795 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:20:42,795 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:20:42,796 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:42" (1/1) ... [2023-11-24 23:20:42,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:20:42,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:20:42,862 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:20:42,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:20:42,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:20:42,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 23:20:42,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-24 23:20:42,916 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-24 23:20:42,916 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-24 23:20:42,917 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-24 23:20:42,917 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-24 23:20:42,917 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-24 23:20:42,917 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-24 23:20:42,917 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-24 23:20:42,918 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-24 23:20:42,918 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-24 23:20:42,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:20:42,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-24 23:20:42,919 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-24 23:20:42,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 23:20:42,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:20:42,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:20:42,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 23:20:42,922 WARN L213 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 23:20:43,115 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:20:43,119 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:20:43,921 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:20:44,647 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:20:44,648 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-24 23:20:44,649 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:20:44 BoogieIcfgContainer [2023-11-24 23:20:44,649 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:20:44,655 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:20:44,656 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:20:44,660 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:20:44,660 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:20:42" (1/3) ... [2023-11-24 23:20:44,661 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6812319b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:20:44, skipping insertion in model container [2023-11-24 23:20:44,661 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:42" (2/3) ... [2023-11-24 23:20:44,663 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6812319b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:20:44, skipping insertion in model container [2023-11-24 23:20:44,663 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:20:44" (3/3) ... [2023-11-24 23:20:44,664 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-equiv.wvr.c [2023-11-24 23:20:44,675 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-24 23:20:44,685 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:20:44,686 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-11-24 23:20:44,686 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 23:20:44,876 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-11-24 23:20:44,924 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 96 places, 92 transitions, 224 flow [2023-11-24 23:20:46,314 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 20835 states, 20103 states have (on average 4.242849325971248) internal successors, (85294), 20834 states have internal predecessors, (85294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:46,335 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:20:46,342 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;@5c7bb5b7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:20:46,342 INFO L358 AbstractCegarLoop]: Starting to check reachability of 58 error locations. [2023-11-24 23:20:46,460 INFO L276 IsEmpty]: Start isEmpty. Operand has 20835 states, 20103 states have (on average 4.242849325971248) internal successors, (85294), 20834 states have internal predecessors, (85294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:46,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-24 23:20:46,483 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:46,484 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-24 23:20:46,484 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-24 23:20:46,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:46,494 INFO L85 PathProgramCache]: Analyzing trace with hash 34064, now seen corresponding path program 1 times [2023-11-24 23:20:46,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:46,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920526929] [2023-11-24 23:20:46,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:46,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:46,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:46,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:20:46,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:46,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920526929] [2023-11-24 23:20:46,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920526929] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:46,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:20:46,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 23:20:46,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805146597] [2023-11-24 23:20:46,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:46,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:20:46,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:46,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:20:46,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:20:46,902 INFO L87 Difference]: Start difference. First operand has 20835 states, 20103 states have (on average 4.242849325971248) internal successors, (85294), 20834 states have internal predecessors, (85294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:47,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:47,609 INFO L93 Difference]: Finished difference Result 14406 states and 56401 transitions. [2023-11-24 23:20:47,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:20:47,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2023-11-24 23:20:47,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:47,922 INFO L225 Difference]: With dead ends: 14406 [2023-11-24 23:20:47,923 INFO L226 Difference]: Without dead ends: 14406 [2023-11-24 23:20:47,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:20:47,933 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 71 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:47,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 9 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:20:48,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14406 states. [2023-11-24 23:20:48,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14406 to 14406. [2023-11-24 23:20:48,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14406 states, 14061 states have (on average 4.0111656354455585) internal successors, (56401), 14405 states have internal predecessors, (56401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:48,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14406 states to 14406 states and 56401 transitions. [2023-11-24 23:20:48,948 INFO L78 Accepts]: Start accepts. Automaton has 14406 states and 56401 transitions. Word has length 2 [2023-11-24 23:20:48,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:48,948 INFO L495 AbstractCegarLoop]: Abstraction has 14406 states and 56401 transitions. [2023-11-24 23:20:48,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:48,949 INFO L276 IsEmpty]: Start isEmpty. Operand 14406 states and 56401 transitions. [2023-11-24 23:20:48,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-24 23:20:48,949 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:48,950 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-24 23:20:48,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:20:48,950 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-24 23:20:48,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:48,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1057029, now seen corresponding path program 1 times [2023-11-24 23:20:48,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:48,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064876261] [2023-11-24 23:20:48,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:48,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:48,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:49,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:20:49,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:49,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064876261] [2023-11-24 23:20:49,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064876261] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:49,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:20:49,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 23:20:49,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617375911] [2023-11-24 23:20:49,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:49,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:20:49,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:49,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:20:49,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:20:49,024 INFO L87 Difference]: Start difference. First operand 14406 states and 56401 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:49,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:49,509 INFO L93 Difference]: Finished difference Result 11755 states and 45936 transitions. [2023-11-24 23:20:49,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:20:49,510 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-24 23:20:49,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:49,618 INFO L225 Difference]: With dead ends: 11755 [2023-11-24 23:20:49,619 INFO L226 Difference]: Without dead ends: 11755 [2023-11-24 23:20:49,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:20:49,621 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 66 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:49,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 9 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:20:49,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11755 states. [2023-11-24 23:20:50,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11755 to 11755. [2023-11-24 23:20:50,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11755 states, 11538 states have (on average 3.9812792511700468) internal successors, (45936), 11754 states have internal predecessors, (45936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:50,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11755 states to 11755 states and 45936 transitions. [2023-11-24 23:20:50,313 INFO L78 Accepts]: Start accepts. Automaton has 11755 states and 45936 transitions. Word has length 3 [2023-11-24 23:20:50,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:50,314 INFO L495 AbstractCegarLoop]: Abstraction has 11755 states and 45936 transitions. [2023-11-24 23:20:50,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:50,314 INFO L276 IsEmpty]: Start isEmpty. Operand 11755 states and 45936 transitions. [2023-11-24 23:20:50,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-24 23:20:50,315 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:50,315 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 23:20:50,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 23:20:50,316 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-24 23:20:50,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:50,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1015838821, now seen corresponding path program 1 times [2023-11-24 23:20:50,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:50,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766953231] [2023-11-24 23:20:50,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:50,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:50,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:50,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:20:50,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:50,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766953231] [2023-11-24 23:20:50,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766953231] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:50,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:20:50,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:20:50,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973376552] [2023-11-24 23:20:50,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:50,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:20:50,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:50,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:20:50,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:20:50,446 INFO L87 Difference]: Start difference. First operand 11755 states and 45936 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:50,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:50,918 INFO L93 Difference]: Finished difference Result 11758 states and 45940 transitions. [2023-11-24 23:20:50,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:20:50,919 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-24 23:20:50,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:51,056 INFO L225 Difference]: With dead ends: 11758 [2023-11-24 23:20:51,056 INFO L226 Difference]: Without dead ends: 11758 [2023-11-24 23:20:51,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:20:51,058 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:51,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 26 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:20:51,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11758 states. [2023-11-24 23:20:51,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11758 to 11758. [2023-11-24 23:20:51,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11758 states, 11541 states have (on average 3.9805909366606014) internal successors, (45940), 11757 states have internal predecessors, (45940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:51,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11758 states to 11758 states and 45940 transitions. [2023-11-24 23:20:51,700 INFO L78 Accepts]: Start accepts. Automaton has 11758 states and 45940 transitions. Word has length 5 [2023-11-24 23:20:51,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:51,701 INFO L495 AbstractCegarLoop]: Abstraction has 11758 states and 45940 transitions. [2023-11-24 23:20:51,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:51,701 INFO L276 IsEmpty]: Start isEmpty. Operand 11758 states and 45940 transitions. [2023-11-24 23:20:51,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-24 23:20:51,702 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:51,703 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-24 23:20:51,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 23:20:51,706 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-24 23:20:51,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:51,707 INFO L85 PathProgramCache]: Analyzing trace with hash 515832159, now seen corresponding path program 1 times [2023-11-24 23:20:51,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:51,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315981975] [2023-11-24 23:20:51,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:51,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:51,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:51,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:20:51,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:51,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315981975] [2023-11-24 23:20:51,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315981975] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:20:51,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586061802] [2023-11-24 23:20:51,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:51,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:20:51,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:20:51,938 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:20:52,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:20:52,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:52,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 23:20:52,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:20:52,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:20:52,334 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:20:52,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586061802] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:52,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:20:52,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-24 23:20:52,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043622904] [2023-11-24 23:20:52,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:52,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:20:52,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:52,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:20:52,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:20:52,336 INFO L87 Difference]: Start difference. First operand 11758 states and 45940 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:52,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:52,868 INFO L93 Difference]: Finished difference Result 11757 states and 45939 transitions. [2023-11-24 23:20:52,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:20:52,868 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-24 23:20:52,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:52,947 INFO L225 Difference]: With dead ends: 11757 [2023-11-24 23:20:52,947 INFO L226 Difference]: Without dead ends: 11757 [2023-11-24 23:20:52,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-24 23:20:52,949 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 8 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:52,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 28 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:20:52,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11757 states. [2023-11-24 23:20:53,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11757 to 11757. [2023-11-24 23:20:53,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11757 states, 11541 states have (on average 3.9805042890564075) internal successors, (45939), 11756 states have internal predecessors, (45939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:53,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11757 states to 11757 states and 45939 transitions. [2023-11-24 23:20:53,562 INFO L78 Accepts]: Start accepts. Automaton has 11757 states and 45939 transitions. Word has length 8 [2023-11-24 23:20:53,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:53,562 INFO L495 AbstractCegarLoop]: Abstraction has 11757 states and 45939 transitions. [2023-11-24 23:20:53,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:53,563 INFO L276 IsEmpty]: Start isEmpty. Operand 11757 states and 45939 transitions. [2023-11-24 23:20:53,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-24 23:20:53,563 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:53,564 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-11-24 23:20:53,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-24 23:20:53,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:20:53,771 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-24 23:20:53,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:53,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1189071163, now seen corresponding path program 1 times [2023-11-24 23:20:53,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:53,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729750913] [2023-11-24 23:20:53,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:53,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:53,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:53,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:20:53,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:53,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729750913] [2023-11-24 23:20:53,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729750913] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:20:53,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638521149] [2023-11-24 23:20:53,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:53,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:20:53,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:20:53,922 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:20:53,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:20:54,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:54,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 23:20:54,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:20:54,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:20:54,092 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:20:54,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:20:54,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638521149] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:20:54,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1499818006] [2023-11-24 23:20:54,302 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:243) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-24 23:20:54,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:20:54,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-24 23:20:54,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444506886] [2023-11-24 23:20:54,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:20:54,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-24 23:20:54,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:54,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-24 23:20:54,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-24 23:20:54,306 INFO L87 Difference]: Start difference. First operand 11757 states and 45939 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:54,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:54,792 INFO L93 Difference]: Finished difference Result 11766 states and 45951 transitions. [2023-11-24 23:20:54,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 23:20:54,793 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-24 23:20:54,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:54,864 INFO L225 Difference]: With dead ends: 11766 [2023-11-24 23:20:54,864 INFO L226 Difference]: Without dead ends: 11766 [2023-11-24 23:20:54,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2023-11-24 23:20:54,866 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 10 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:54,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 62 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:20:54,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11766 states. [2023-11-24 23:20:55,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11766 to 11766. [2023-11-24 23:20:55,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11766 states, 11550 states have (on average 3.9784415584415584) internal successors, (45951), 11765 states have internal predecessors, (45951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:55,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11766 states to 11766 states and 45951 transitions. [2023-11-24 23:20:55,440 INFO L78 Accepts]: Start accepts. Automaton has 11766 states and 45951 transitions. Word has length 9 [2023-11-24 23:20:55,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:55,440 INFO L495 AbstractCegarLoop]: Abstraction has 11766 states and 45951 transitions. [2023-11-24 23:20:55,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:55,440 INFO L276 IsEmpty]: Start isEmpty. Operand 11766 states and 45951 transitions. [2023-11-24 23:20:55,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 23:20:55,441 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:55,442 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:20:55,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 23:20:55,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:20:55,643 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread4Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-24 23:20:55,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:55,643 INFO L85 PathProgramCache]: Analyzing trace with hash -378211551, now seen corresponding path program 1 times [2023-11-24 23:20:55,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:55,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824921638] [2023-11-24 23:20:55,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:55,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:55,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:55,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:20:55,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:55,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824921638] [2023-11-24 23:20:55,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824921638] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:55,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:20:55,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:20:55,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071136460] [2023-11-24 23:20:55,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:55,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:20:55,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:55,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:20:55,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:20:55,822 INFO L87 Difference]: Start difference. First operand 11766 states and 45951 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:56,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:56,148 INFO L93 Difference]: Finished difference Result 16368 states and 64107 transitions. [2023-11-24 23:20:56,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:20:56,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-24 23:20:56,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:56,237 INFO L225 Difference]: With dead ends: 16368 [2023-11-24 23:20:56,238 INFO L226 Difference]: Without dead ends: 16368 [2023-11-24 23:20:56,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:20:56,239 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 45 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:56,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 22 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:20:56,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16368 states. [2023-11-24 23:20:56,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16368 to 14148. [2023-11-24 23:20:56,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14148 states, 13932 states have (on average 4.025337352856733) internal successors, (56081), 14147 states have internal predecessors, (56081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:57,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14148 states to 14148 states and 56081 transitions. [2023-11-24 23:20:57,060 INFO L78 Accepts]: Start accepts. Automaton has 14148 states and 56081 transitions. Word has length 12 [2023-11-24 23:20:57,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:57,061 INFO L495 AbstractCegarLoop]: Abstraction has 14148 states and 56081 transitions. [2023-11-24 23:20:57,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:57,062 INFO L276 IsEmpty]: Start isEmpty. Operand 14148 states and 56081 transitions. [2023-11-24 23:20:57,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-24 23:20:57,067 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:57,067 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:20:57,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 23:20:57,067 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-24 23:20:57,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:57,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1496423326, now seen corresponding path program 1 times [2023-11-24 23:20:57,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:57,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825248582] [2023-11-24 23:20:57,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:57,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:57,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:57,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:20:57,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:57,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825248582] [2023-11-24 23:20:57,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825248582] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:57,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:20:57,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:20:57,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908439592] [2023-11-24 23:20:57,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:57,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:20:57,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:57,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:20:57,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:20:57,168 INFO L87 Difference]: Start difference. First operand 14148 states and 56081 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:57,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:57,557 INFO L93 Difference]: Finished difference Result 18484 states and 73165 transitions. [2023-11-24 23:20:57,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:20:57,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-24 23:20:57,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:57,959 INFO L225 Difference]: With dead ends: 18484 [2023-11-24 23:20:57,960 INFO L226 Difference]: Without dead ends: 18484 [2023-11-24 23:20:57,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:20:57,961 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:57,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 20 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:20:58,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18484 states. [2023-11-24 23:20:58,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18484 to 17676. [2023-11-24 23:20:58,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17676 states, 17460 states have (on average 4.037514318442153) internal successors, (70495), 17675 states have internal predecessors, (70495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:58,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17676 states to 17676 states and 70495 transitions. [2023-11-24 23:20:58,642 INFO L78 Accepts]: Start accepts. Automaton has 17676 states and 70495 transitions. Word has length 13 [2023-11-24 23:20:58,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:58,642 INFO L495 AbstractCegarLoop]: Abstraction has 17676 states and 70495 transitions. [2023-11-24 23:20:58,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:58,643 INFO L276 IsEmpty]: Start isEmpty. Operand 17676 states and 70495 transitions. [2023-11-24 23:20:58,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-24 23:20:58,649 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:58,649 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:20:58,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 23:20:58,650 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread4Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-24 23:20:58,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:58,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1160345005, now seen corresponding path program 1 times [2023-11-24 23:20:58,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:58,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373598695] [2023-11-24 23:20:58,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:58,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:58,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:59,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:20:59,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:59,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373598695] [2023-11-24 23:20:59,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373598695] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:59,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:20:59,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:20:59,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213087610] [2023-11-24 23:20:59,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:59,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:20:59,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:59,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:20:59,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:20:59,116 INFO L87 Difference]: Start difference. First operand 17676 states and 70495 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:20:59,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:59,692 INFO L93 Difference]: Finished difference Result 26423 states and 103670 transitions. [2023-11-24 23:20:59,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:20:59,693 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-24 23:20:59,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:59,897 INFO L225 Difference]: With dead ends: 26423 [2023-11-24 23:20:59,897 INFO L226 Difference]: Without dead ends: 26101 [2023-11-24 23:20:59,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:20:59,900 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 89 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:59,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 41 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:20:59,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26101 states. [2023-11-24 23:21:00,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26101 to 23293. [2023-11-24 23:21:00,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23293 states, 23042 states have (on average 4.001041576252061) internal successors, (92192), 23292 states have internal predecessors, (92192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:00,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23293 states to 23293 states and 92192 transitions. [2023-11-24 23:21:00,903 INFO L78 Accepts]: Start accepts. Automaton has 23293 states and 92192 transitions. Word has length 13 [2023-11-24 23:21:00,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:00,903 INFO L495 AbstractCegarLoop]: Abstraction has 23293 states and 92192 transitions. [2023-11-24 23:21:00,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:00,903 INFO L276 IsEmpty]: Start isEmpty. Operand 23293 states and 92192 transitions. [2023-11-24 23:21:00,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-24 23:21:00,904 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:00,904 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:21:00,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 23:21:00,905 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-24 23:21:00,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:00,905 INFO L85 PathProgramCache]: Analyzing trace with hash 855518316, now seen corresponding path program 1 times [2023-11-24 23:21:00,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:00,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195327521] [2023-11-24 23:21:00,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:00,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:00,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:01,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:21:01,284 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:01,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195327521] [2023-11-24 23:21:01,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195327521] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:21:01,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:21:01,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:21:01,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437034508] [2023-11-24 23:21:01,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:21:01,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:21:01,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:01,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:21:01,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:21:01,286 INFO L87 Difference]: Start difference. First operand 23293 states and 92192 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:01,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:01,849 INFO L93 Difference]: Finished difference Result 30149 states and 118910 transitions. [2023-11-24 23:21:01,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:21:01,850 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2023-11-24 23:21:01,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:02,040 INFO L225 Difference]: With dead ends: 30149 [2023-11-24 23:21:02,040 INFO L226 Difference]: Without dead ends: 30149 [2023-11-24 23:21:02,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:21:02,041 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 44 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:02,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 20 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:21:02,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30149 states. [2023-11-24 23:21:03,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30149 to 27229. [2023-11-24 23:21:03,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27229 states, 26978 states have (on average 4.116539402476092) internal successors, (111056), 27228 states have internal predecessors, (111056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:03,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27229 states to 27229 states and 111056 transitions. [2023-11-24 23:21:03,347 INFO L78 Accepts]: Start accepts. Automaton has 27229 states and 111056 transitions. Word has length 14 [2023-11-24 23:21:03,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:03,347 INFO L495 AbstractCegarLoop]: Abstraction has 27229 states and 111056 transitions. [2023-11-24 23:21:03,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:03,348 INFO L276 IsEmpty]: Start isEmpty. Operand 27229 states and 111056 transitions. [2023-11-24 23:21:03,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-24 23:21:03,349 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:03,349 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:21:03,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 23:21:03,349 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-24 23:21:03,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:03,349 INFO L85 PathProgramCache]: Analyzing trace with hash 855518313, now seen corresponding path program 1 times [2023-11-24 23:21:03,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:03,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657333135] [2023-11-24 23:21:03,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:03,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:03,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:03,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:21:03,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:03,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657333135] [2023-11-24 23:21:03,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657333135] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:21:03,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:21:03,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:21:03,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186093284] [2023-11-24 23:21:03,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:21:03,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:21:03,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:03,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:21:03,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:21:03,465 INFO L87 Difference]: Start difference. First operand 27229 states and 111056 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:03,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:03,843 INFO L93 Difference]: Finished difference Result 22537 states and 91230 transitions. [2023-11-24 23:21:03,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:21:03,844 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2023-11-24 23:21:03,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:03,969 INFO L225 Difference]: With dead ends: 22537 [2023-11-24 23:21:03,969 INFO L226 Difference]: Without dead ends: 20628 [2023-11-24 23:21:03,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:21:03,970 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:03,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 37 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:21:04,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20628 states. [2023-11-24 23:21:04,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20628 to 20628. [2023-11-24 23:21:04,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20628 states, 20412 states have (on average 4.150695669214188) internal successors, (84724), 20627 states have internal predecessors, (84724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:04,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20628 states to 20628 states and 84724 transitions. [2023-11-24 23:21:04,995 INFO L78 Accepts]: Start accepts. Automaton has 20628 states and 84724 transitions. Word has length 14 [2023-11-24 23:21:04,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:04,995 INFO L495 AbstractCegarLoop]: Abstraction has 20628 states and 84724 transitions. [2023-11-24 23:21:04,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:04,995 INFO L276 IsEmpty]: Start isEmpty. Operand 20628 states and 84724 transitions. [2023-11-24 23:21:04,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-24 23:21:04,996 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:04,996 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:21:04,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 23:21:04,997 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread4Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-24 23:21:04,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:04,997 INFO L85 PathProgramCache]: Analyzing trace with hash -676307801, now seen corresponding path program 1 times [2023-11-24 23:21:04,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:04,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946504325] [2023-11-24 23:21:04,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:04,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:05,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:05,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:21:05,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:05,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946504325] [2023-11-24 23:21:05,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946504325] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:21:05,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438380472] [2023-11-24 23:21:05,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:05,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:21:05,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:21:05,151 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:21:05,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 23:21:05,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:05,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-24 23:21:05,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:21:05,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:21:05,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:21:05,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:21:05,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438380472] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:21:05,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [473992859] [2023-11-24 23:21:05,591 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-24 23:21:05,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:21:05,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-24 23:21:05,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231490384] [2023-11-24 23:21:05,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:21:05,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 23:21:05,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:05,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 23:21:05,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-24 23:21:05,594 INFO L87 Difference]: Start difference. First operand 20628 states and 84724 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:06,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:06,960 INFO L93 Difference]: Finished difference Result 30851 states and 124727 transitions. [2023-11-24 23:21:06,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 23:21:06,960 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-24 23:21:06,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:07,141 INFO L225 Difference]: With dead ends: 30851 [2023-11-24 23:21:07,141 INFO L226 Difference]: Without dead ends: 30529 [2023-11-24 23:21:07,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2023-11-24 23:21:07,142 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 269 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:07,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 98 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 23:21:07,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30529 states. [2023-11-24 23:21:07,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30529 to 27229. [2023-11-24 23:21:07,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27229 states, 26978 states have (on average 4.1165023352361185) internal successors, (111055), 27228 states have internal predecessors, (111055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:08,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27229 states to 27229 states and 111055 transitions. [2023-11-24 23:21:08,372 INFO L78 Accepts]: Start accepts. Automaton has 27229 states and 111055 transitions. Word has length 16 [2023-11-24 23:21:08,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:08,373 INFO L495 AbstractCegarLoop]: Abstraction has 27229 states and 111055 transitions. [2023-11-24 23:21:08,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:08,374 INFO L276 IsEmpty]: Start isEmpty. Operand 27229 states and 111055 transitions. [2023-11-24 23:21:08,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-24 23:21:08,375 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:08,375 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:21:08,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-24 23:21:08,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-24 23:21:08,581 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-24 23:21:08,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:08,582 INFO L85 PathProgramCache]: Analyzing trace with hash -246143825, now seen corresponding path program 1 times [2023-11-24 23:21:08,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:08,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189456753] [2023-11-24 23:21:08,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:08,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:08,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:08,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:21:08,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:08,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189456753] [2023-11-24 23:21:08,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189456753] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:21:08,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462001076] [2023-11-24 23:21:08,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:08,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:21:08,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:21:08,797 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:21:08,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 23:21:08,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:08,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-24 23:21:08,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:21:09,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:21:09,070 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:21:09,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:21:09,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462001076] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:21:09,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1553626660] [2023-11-24 23:21:09,180 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-24 23:21:09,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:21:09,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-24 23:21:09,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696689856] [2023-11-24 23:21:09,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:21:09,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 23:21:09,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:09,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 23:21:09,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-24 23:21:09,185 INFO L87 Difference]: Start difference. First operand 27229 states and 111055 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:10,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:10,048 INFO L93 Difference]: Finished difference Result 22537 states and 90149 transitions. [2023-11-24 23:21:10,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 23:21:10,048 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-24 23:21:10,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:10,180 INFO L225 Difference]: With dead ends: 22537 [2023-11-24 23:21:10,181 INFO L226 Difference]: Without dead ends: 20100 [2023-11-24 23:21:10,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2023-11-24 23:21:10,182 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 100 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:10,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 111 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 23:21:10,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20100 states. [2023-11-24 23:21:10,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20100 to 18780. [2023-11-24 23:21:10,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18780 states, 18554 states have (on average 4.136197046458984) internal successors, (76743), 18779 states have internal predecessors, (76743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:11,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18780 states to 18780 states and 76743 transitions. [2023-11-24 23:21:11,319 INFO L78 Accepts]: Start accepts. Automaton has 18780 states and 76743 transitions. Word has length 17 [2023-11-24 23:21:11,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:11,319 INFO L495 AbstractCegarLoop]: Abstraction has 18780 states and 76743 transitions. [2023-11-24 23:21:11,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:11,320 INFO L276 IsEmpty]: Start isEmpty. Operand 18780 states and 76743 transitions. [2023-11-24 23:21:11,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-24 23:21:11,320 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:11,321 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1] [2023-11-24 23:21:11,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 23:21:11,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-24 23:21:11,525 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-24 23:21:11,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:11,525 INFO L85 PathProgramCache]: Analyzing trace with hash 35785983, now seen corresponding path program 2 times [2023-11-24 23:21:11,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:11,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497427056] [2023-11-24 23:21:11,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:11,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:11,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:11,686 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:21:11,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:11,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497427056] [2023-11-24 23:21:11,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497427056] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:21:11,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877034217] [2023-11-24 23:21:11,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 23:21:11,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:21:11,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:21:11,688 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:21:11,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 23:21:11,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-24 23:21:11,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 23:21:11,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 23:21:11,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:21:11,874 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-24 23:21:11,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:21:11,922 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-24 23:21:11,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877034217] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:21:11,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [38363920] [2023-11-24 23:21:11,924 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:243) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-24 23:21:11,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:21:11,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 3, 3] total 13 [2023-11-24 23:21:11,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750571633] [2023-11-24 23:21:11,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:21:11,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 23:21:11,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:11,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 23:21:11,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-24 23:21:11,929 INFO L87 Difference]: Start difference. First operand 18780 states and 76743 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:12,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:12,370 INFO L93 Difference]: Finished difference Result 18782 states and 76746 transitions. [2023-11-24 23:21:12,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 23:21:12,371 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 18 [2023-11-24 23:21:12,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:12,454 INFO L225 Difference]: With dead ends: 18782 [2023-11-24 23:21:12,455 INFO L226 Difference]: Without dead ends: 18782 [2023-11-24 23:21:12,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=426, Unknown=0, NotChecked=0, Total=600 [2023-11-24 23:21:12,456 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:12,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 35 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:21:12,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18782 states. [2023-11-24 23:21:12,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18782 to 18771. [2023-11-24 23:21:12,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18771 states, 18546 states have (on average 4.137388116035803) internal successors, (76732), 18770 states have internal predecessors, (76732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:12,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18771 states to 18771 states and 76732 transitions. [2023-11-24 23:21:12,954 INFO L78 Accepts]: Start accepts. Automaton has 18771 states and 76732 transitions. Word has length 18 [2023-11-24 23:21:12,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:12,954 INFO L495 AbstractCegarLoop]: Abstraction has 18771 states and 76732 transitions. [2023-11-24 23:21:12,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:12,955 INFO L276 IsEmpty]: Start isEmpty. Operand 18771 states and 76732 transitions. [2023-11-24 23:21:12,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-24 23:21:12,955 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:12,955 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:21:12,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 23:21:13,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:21:13,156 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread4Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-24 23:21:13,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:13,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1483299693, now seen corresponding path program 2 times [2023-11-24 23:21:13,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:13,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787967859] [2023-11-24 23:21:13,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:13,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:13,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:14,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:21:14,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:14,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787967859] [2023-11-24 23:21:14,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787967859] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:21:14,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291708309] [2023-11-24 23:21:14,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 23:21:14,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:21:14,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:21:14,216 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:21:14,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 23:21:14,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-24 23:21:14,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 23:21:14,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-24 23:21:14,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:21:14,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-24 23:21:14,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:21:14,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-24 23:21:14,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:21:14,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-24 23:21:14,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-11-24 23:21:14,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:21:14,756 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:21:14,878 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_238 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_238) c_~X_0~0.base) (+ c_~X_0~0.offset 4)) 9223372039002259456))) is different from false [2023-11-24 23:21:14,909 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_238 (Array Int Int)) (v_ArrVal_237 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_237) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_238) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456))) is different from false [2023-11-24 23:21:14,948 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:21:14,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-11-24 23:21:14,963 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:21:14,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 147 [2023-11-24 23:21:14,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2023-11-24 23:21:14,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2023-11-24 23:21:15,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-11-24 23:21:15,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291708309] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:21:15,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [282299585] [2023-11-24 23:21:15,193 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-24 23:21:15,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:21:15,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-11-24 23:21:15,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123244888] [2023-11-24 23:21:15,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:21:15,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-24 23:21:15,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:15,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-24 23:21:15,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=531, Unknown=2, NotChecked=94, Total=702 [2023-11-24 23:21:15,197 INFO L87 Difference]: Start difference. First operand 18771 states and 76732 transitions. Second operand has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:17,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:17,137 INFO L93 Difference]: Finished difference Result 27959 states and 116141 transitions. [2023-11-24 23:21:17,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 23:21:17,138 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 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 19 [2023-11-24 23:21:17,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:17,267 INFO L225 Difference]: With dead ends: 27959 [2023-11-24 23:21:17,268 INFO L226 Difference]: Without dead ends: 27959 [2023-11-24 23:21:17,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=204, Invalid=1062, Unknown=2, NotChecked=138, Total=1406 [2023-11-24 23:21:17,269 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 360 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 1662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 407 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:17,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 147 Invalid, 1662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1246 Invalid, 0 Unknown, 407 Unchecked, 1.1s Time] [2023-11-24 23:21:17,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27959 states. [2023-11-24 23:21:17,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27959 to 19837. [2023-11-24 23:21:17,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19837 states, 19612 states have (on average 4.2970630226392) internal successors, (84274), 19836 states have internal predecessors, (84274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:18,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19837 states to 19837 states and 84274 transitions. [2023-11-24 23:21:18,061 INFO L78 Accepts]: Start accepts. Automaton has 19837 states and 84274 transitions. Word has length 19 [2023-11-24 23:21:18,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:18,061 INFO L495 AbstractCegarLoop]: Abstraction has 19837 states and 84274 transitions. [2023-11-24 23:21:18,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:18,062 INFO L276 IsEmpty]: Start isEmpty. Operand 19837 states and 84274 transitions. [2023-11-24 23:21:18,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-24 23:21:18,062 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:18,063 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:21:18,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 23:21:18,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:21:18,269 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread4Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-24 23:21:18,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:18,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1483299694, now seen corresponding path program 1 times [2023-11-24 23:21:18,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:18,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188093878] [2023-11-24 23:21:18,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:18,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:18,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:18,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:21:18,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:18,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188093878] [2023-11-24 23:21:18,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188093878] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:21:18,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492737917] [2023-11-24 23:21:18,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:18,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:21:18,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:21:18,920 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:21:18,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 23:21:19,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:19,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-24 23:21:19,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:21:19,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-24 23:21:19,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-24 23:21:19,163 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-24 23:21:19,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-24 23:21:19,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-24 23:21:19,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:21:19,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-24 23:21:19,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-24 23:21:19,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-11-24 23:21:19,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:21:19,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:21:19,587 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_272 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_272) c_~X_0~0.base) (+ c_~X_0~0.offset 4)) 4294967296)) is different from false [2023-11-24 23:21:19,697 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:21:19,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-11-24 23:21:19,707 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:21:19,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 65 [2023-11-24 23:21:19,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2023-11-24 23:21:19,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2023-11-24 23:21:19,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:21:19,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492737917] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:21:19,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [923619066] [2023-11-24 23:21:19,951 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-24 23:21:19,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:21:19,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-11-24 23:21:19,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882226081] [2023-11-24 23:21:19,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:21:19,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-24 23:21:19,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:19,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-24 23:21:19,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=4, NotChecked=50, Total=756 [2023-11-24 23:21:19,955 INFO L87 Difference]: Start difference. First operand 19837 states and 84274 transitions. Second operand has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:21,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:21,838 INFO L93 Difference]: Finished difference Result 27959 states and 115075 transitions. [2023-11-24 23:21:21,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-24 23:21:21,838 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 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 19 [2023-11-24 23:21:21,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:22,006 INFO L225 Difference]: With dead ends: 27959 [2023-11-24 23:21:22,006 INFO L226 Difference]: Without dead ends: 27959 [2023-11-24 23:21:22,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=269, Invalid=1371, Unknown=4, NotChecked=78, Total=1722 [2023-11-24 23:21:22,012 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 735 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:22,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [735 Valid, 108 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 907 Invalid, 0 Unknown, 226 Unchecked, 1.0s Time] [2023-11-24 23:21:22,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27959 states. [2023-11-24 23:21:22,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27959 to 19837. [2023-11-24 23:21:22,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19837 states, 19612 states have (on average 4.242708545788293) internal successors, (83208), 19836 states have internal predecessors, (83208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:22,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19837 states to 19837 states and 83208 transitions. [2023-11-24 23:21:22,809 INFO L78 Accepts]: Start accepts. Automaton has 19837 states and 83208 transitions. Word has length 19 [2023-11-24 23:21:22,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:22,810 INFO L495 AbstractCegarLoop]: Abstraction has 19837 states and 83208 transitions. [2023-11-24 23:21:22,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:22,810 INFO L276 IsEmpty]: Start isEmpty. Operand 19837 states and 83208 transitions. [2023-11-24 23:21:22,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-24 23:21:22,811 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:22,811 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:21:22,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 23:21:23,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:21:23,014 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread4Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-24 23:21:23,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:23,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1483299696, now seen corresponding path program 1 times [2023-11-24 23:21:23,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:23,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672356111] [2023-11-24 23:21:23,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:23,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:23,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:23,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 23:21:23,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:23,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672356111] [2023-11-24 23:21:23,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672356111] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:21:23,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:21:23,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:21:23,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997582678] [2023-11-24 23:21:23,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:21:23,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:21:23,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:23,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:21:23,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:21:23,169 INFO L87 Difference]: Start difference. First operand 19837 states and 83208 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:23,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:23,904 INFO L93 Difference]: Finished difference Result 25789 states and 104311 transitions. [2023-11-24 23:21:23,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:21:23,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 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 19 [2023-11-24 23:21:23,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:24,081 INFO L225 Difference]: With dead ends: 25789 [2023-11-24 23:21:24,081 INFO L226 Difference]: Without dead ends: 25789 [2023-11-24 23:21:24,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:21:24,082 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 47 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:24,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 20 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:21:24,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25789 states. [2023-11-24 23:21:24,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25789 to 20897. [2023-11-24 23:21:24,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20897 states, 20672 states have (on average 4.233988003095975) internal successors, (87525), 20896 states have internal predecessors, (87525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:24,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20897 states to 20897 states and 87525 transitions. [2023-11-24 23:21:24,839 INFO L78 Accepts]: Start accepts. Automaton has 20897 states and 87525 transitions. Word has length 19 [2023-11-24 23:21:24,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:24,840 INFO L495 AbstractCegarLoop]: Abstraction has 20897 states and 87525 transitions. [2023-11-24 23:21:24,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:21:24,840 INFO L276 IsEmpty]: Start isEmpty. Operand 20897 states and 87525 transitions. [2023-11-24 23:21:24,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-24 23:21:24,841 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:24,841 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:21:24,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-24 23:21:24,842 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 55 more)] === [2023-11-24 23:21:24,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:24,842 INFO L85 PathProgramCache]: Analyzing trace with hash -2017788247, now seen corresponding path program 2 times [2023-11-24 23:21:24,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:24,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490443920] [2023-11-24 23:21:24,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:24,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:24,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:25,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:21:25,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:25,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490443920] [2023-11-24 23:21:25,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490443920] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:21:25,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458737554] [2023-11-24 23:21:25,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 23:21:25,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:21:25,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:21:25,764 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:21:25,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_564f8a11-301c-46ab-8ee8-583a6b402d2b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 23:21:25,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-24 23:21:25,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 23:21:25,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-24 23:21:25,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:21:26,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-24 23:21:26,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:21:26,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15