./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/prefixsum_iter.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7efad96-9769-4e93-ba4a-97b83cb268dc/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7efad96-9769-4e93-ba4a-97b83cb268dc/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_b7efad96-9769-4e93-ba4a-97b83cb268dc/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7efad96-9769-4e93-ba4a-97b83cb268dc/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/prefixsum_iter.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7efad96-9769-4e93-ba4a-97b83cb268dc/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7efad96-9769-4e93-ba4a-97b83cb268dc/bin/utaipan-verify-SwPr7d2a91 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:02:30,206 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:02:30,323 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7efad96-9769-4e93-ba4a-97b83cb268dc/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-25 00:02:30,330 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:02:30,331 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:02:30,376 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:02:30,377 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:02:30,378 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:02:30,379 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:02:30,384 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:02:30,384 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:02:30,386 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:02:30,386 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:02:30,388 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:02:30,389 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:02:30,389 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:02:30,390 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:02:30,390 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:02:30,391 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:02:30,391 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:02:30,392 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:02:30,393 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:02:30,394 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:02:30,395 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:02:30,395 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-25 00:02:30,396 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:02:30,396 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-25 00:02:30,397 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:02:30,397 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:02:30,398 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:02:30,399 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:02:30,400 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-25 00:02:30,400 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:02:30,400 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:02:30,401 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:02:30,401 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:02:30,401 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:02:30,402 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:02:30,402 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:02:30,403 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:02:30,403 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:02:30,403 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:02:30,404 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:02:30,404 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:02:30,405 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:02:30,405 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:02:30,405 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:02:30,406 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_b7efad96-9769-4e93-ba4a-97b83cb268dc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7efad96-9769-4e93-ba4a-97b83cb268dc/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d [2023-11-25 00:02:30,709 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:02:30,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:02:30,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:02:30,749 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:02:30,750 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:02:30,751 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7efad96-9769-4e93-ba4a-97b83cb268dc/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/verifythis/prefixsum_iter.c [2023-11-25 00:02:33,875 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:02:34,088 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:02:34,089 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7efad96-9769-4e93-ba4a-97b83cb268dc/sv-benchmarks/c/verifythis/prefixsum_iter.c [2023-11-25 00:02:34,098 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7efad96-9769-4e93-ba4a-97b83cb268dc/bin/utaipan-verify-SwPr7d2a91/data/81b7b5715/d2e2010e127142509e72e43508302957/FLAG786593f13 [2023-11-25 00:02:34,113 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7efad96-9769-4e93-ba4a-97b83cb268dc/bin/utaipan-verify-SwPr7d2a91/data/81b7b5715/d2e2010e127142509e72e43508302957 [2023-11-25 00:02:34,116 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:02:34,118 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:02:34,120 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:02:34,120 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:02:34,126 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:02:34,127 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:02:34" (1/1) ... [2023-11-25 00:02:34,128 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3895cfd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:34, skipping insertion in model container [2023-11-25 00:02:34,128 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:02:34" (1/1) ... [2023-11-25 00:02:34,153 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:02:34,355 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7efad96-9769-4e93-ba4a-97b83cb268dc/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2023-11-25 00:02:34,407 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:02:34,420 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:02:34,433 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7efad96-9769-4e93-ba4a-97b83cb268dc/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2023-11-25 00:02:34,457 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:02:34,477 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:02:34,477 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:34 WrapperNode [2023-11-25 00:02:34,478 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:02:34,479 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:02:34,479 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:02:34,480 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:02:34,488 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:34" (1/1) ... [2023-11-25 00:02:34,496 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:34" (1/1) ... [2023-11-25 00:02:34,523 INFO L138 Inliner]: procedures = 22, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 129 [2023-11-25 00:02:34,523 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:02:34,528 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:02:34,528 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:02:34,529 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:02:34,538 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:34" (1/1) ... [2023-11-25 00:02:34,538 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:34" (1/1) ... [2023-11-25 00:02:34,542 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:34" (1/1) ... [2023-11-25 00:02:34,542 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:34" (1/1) ... [2023-11-25 00:02:34,550 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:34" (1/1) ... [2023-11-25 00:02:34,568 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:34" (1/1) ... [2023-11-25 00:02:34,570 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:34" (1/1) ... [2023-11-25 00:02:34,571 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:34" (1/1) ... [2023-11-25 00:02:34,575 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:02:34,576 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:02:34,576 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:02:34,576 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:02:34,577 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:34" (1/1) ... [2023-11-25 00:02:34,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:02:34,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7efad96-9769-4e93-ba4a-97b83cb268dc/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:02:34,622 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7efad96-9769-4e93-ba4a-97b83cb268dc/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:02:34,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7efad96-9769-4e93-ba4a-97b83cb268dc/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:02:34,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:02:34,658 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-25 00:02:34,658 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-25 00:02:34,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:02:34,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-25 00:02:34,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-25 00:02:34,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:02:34,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:02:34,659 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-25 00:02:34,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-25 00:02:34,660 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-25 00:02:34,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-25 00:02:34,754 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:02:34,756 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:02:35,143 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:02:35,223 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:02:35,223 INFO L309 CfgBuilder]: Removed 7 assume(true) statements. [2023-11-25 00:02:35,225 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:02:35 BoogieIcfgContainer [2023-11-25 00:02:35,225 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:02:35,228 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:02:35,228 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:02:35,236 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:02:35,243 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:02:34" (1/3) ... [2023-11-25 00:02:35,244 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@105982a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:02:35, skipping insertion in model container [2023-11-25 00:02:35,244 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:34" (2/3) ... [2023-11-25 00:02:35,245 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@105982a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:02:35, skipping insertion in model container [2023-11-25 00:02:35,245 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:02:35" (3/3) ... [2023-11-25 00:02:35,246 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2023-11-25 00:02:35,270 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:02:35,271 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-25 00:02:35,316 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:02:35,322 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;@405375f5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:02:35,323 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-25 00:02:35,328 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-25 00:02:35,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-25 00:02:35,339 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:35,340 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:02:35,341 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:02:35,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:35,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1701293887, now seen corresponding path program 1 times [2023-11-25 00:02:35,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:35,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338383022] [2023-11-25 00:02:35,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:35,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:35,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:36,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-25 00:02:36,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:36,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338383022] [2023-11-25 00:02:36,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338383022] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:02:36,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:02:36,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-25 00:02:36,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104767565] [2023-11-25 00:02:36,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:02:36,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:02:36,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:36,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:02:36,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:02:36,157 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-25 00:02:36,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:36,284 INFO L93 Difference]: Finished difference Result 38 states and 55 transitions. [2023-11-25 00:02:36,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-25 00:02:36,288 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 24 [2023-11-25 00:02:36,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:36,296 INFO L225 Difference]: With dead ends: 38 [2023-11-25 00:02:36,296 INFO L226 Difference]: Without dead ends: 26 [2023-11-25 00:02:36,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-25 00:02:36,306 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 16 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:36,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 92 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:02:36,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-25 00:02:36,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2023-11-25 00:02:36,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-25 00:02:36,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2023-11-25 00:02:36,349 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 24 [2023-11-25 00:02:36,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:36,351 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2023-11-25 00:02:36,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-25 00:02:36,352 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2023-11-25 00:02:36,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-25 00:02:36,353 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:36,353 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:02:36,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-25 00:02:36,354 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:02:36,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:36,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1598743876, now seen corresponding path program 1 times [2023-11-25 00:02:36,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:36,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728660075] [2023-11-25 00:02:36,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:36,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:36,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:37,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-25 00:02:37,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:37,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728660075] [2023-11-25 00:02:37,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728660075] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:02:37,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978747663] [2023-11-25 00:02:37,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:37,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:37,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7efad96-9769-4e93-ba4a-97b83cb268dc/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:02:37,227 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7efad96-9769-4e93-ba4a-97b83cb268dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:02:37,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7efad96-9769-4e93-ba4a-97b83cb268dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:02:37,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:37,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-25 00:02:37,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:02:37,668 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 11 treesize of output 7 [2023-11-25 00:02:37,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-25 00:02:37,769 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:02:37,807 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 15 treesize of output 13 [2023-11-25 00:02:37,812 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 14 treesize of output 12 [2023-11-25 00:02:37,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-25 00:02:37,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978747663] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:02:37,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [968089253] [2023-11-25 00:02:37,931 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-11-25 00:02:37,932 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:02:37,935 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:02:37,941 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:02:37,942 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:02:39,001 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 68 for LOIs [2023-11-25 00:02:39,039 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 75 for LOIs [2023-11-25 00:02:39,128 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:02:42,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [968089253] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:02:42,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-25 00:02:42,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [11, 10, 8] total 39 [2023-11-25 00:02:42,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592442457] [2023-11-25 00:02:42,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:02:42,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-25 00:02:42,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:42,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-25 00:02:42,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1338, Unknown=7, NotChecked=0, Total=1482 [2023-11-25 00:02:42,474 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 20 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-25 00:02:45,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-25 00:02:48,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-25 00:02:53,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-25 00:02:53,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:53,786 INFO L93 Difference]: Finished difference Result 60 states and 81 transitions. [2023-11-25 00:02:53,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-25 00:02:53,787 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 25 [2023-11-25 00:02:53,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:53,789 INFO L225 Difference]: With dead ends: 60 [2023-11-25 00:02:53,789 INFO L226 Difference]: Without dead ends: 53 [2023-11-25 00:02:53,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=190, Invalid=1775, Unknown=15, NotChecked=0, Total=1980 [2023-11-25 00:02:53,792 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 27 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 5 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:53,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 146 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 484 Invalid, 14 Unknown, 0 Unchecked, 7.6s Time] [2023-11-25 00:02:53,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-25 00:02:53,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 42. [2023-11-25 00:02:53,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 states have internal predecessors, (40), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-25 00:02:53,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2023-11-25 00:02:53,818 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 25 [2023-11-25 00:02:53,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:53,818 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2023-11-25 00:02:53,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-25 00:02:53,819 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2023-11-25 00:02:53,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-25 00:02:53,820 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:53,821 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:02:53,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7efad96-9769-4e93-ba4a-97b83cb268dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-25 00:02:54,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7efad96-9769-4e93-ba4a-97b83cb268dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:54,033 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:02:54,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:54,033 INFO L85 PathProgramCache]: Analyzing trace with hash -72943065, now seen corresponding path program 1 times [2023-11-25 00:02:54,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:54,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843642623] [2023-11-25 00:02:54,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:54,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:54,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:54,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-25 00:02:54,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:54,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843642623] [2023-11-25 00:02:54,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843642623] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:02:54,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398181725] [2023-11-25 00:02:54,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:54,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:54,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7efad96-9769-4e93-ba4a-97b83cb268dc/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:02:54,236 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7efad96-9769-4e93-ba4a-97b83cb268dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:02:54,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7efad96-9769-4e93-ba4a-97b83cb268dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-25 00:02:54,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:54,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-25 00:02:54,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:02:54,452 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 11 treesize of output 7 [2023-11-25 00:02:54,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-25 00:02:54,515 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:02:54,562 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 15 treesize of output 13 [2023-11-25 00:02:54,565 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 14 treesize of output 12 [2023-11-25 00:02:54,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-25 00:02:54,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398181725] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:02:54,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1114545198] [2023-11-25 00:02:54,652 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-11-25 00:02:54,653 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:02:54,653 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:02:54,653 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:02:54,654 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:02:55,442 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-11-25 00:02:55,466 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-11-25 00:02:55,498 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:02:58,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1114545198] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:02:58,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-25 00:02:58,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 10, 8] total 36 [2023-11-25 00:02:58,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920010474] [2023-11-25 00:02:58,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:02:58,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-25 00:02:58,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:58,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-25 00:02:58,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1137, Unknown=7, NotChecked=0, Total=1260 [2023-11-25 00:02:58,649 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand has 20 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 13 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-25 00:03:01,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-25 00:03:04,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-25 00:03:06,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-25 00:03:08,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-25 00:03:09,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:09,722 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2023-11-25 00:03:09,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-25 00:03:09,723 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 13 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 26 [2023-11-25 00:03:09,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:09,724 INFO L225 Difference]: With dead ends: 55 [2023-11-25 00:03:09,724 INFO L226 Difference]: Without dead ends: 48 [2023-11-25 00:03:09,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=171, Invalid=1706, Unknown=15, NotChecked=0, Total=1892 [2023-11-25 00:03:09,727 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 31 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 11 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:09,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 62 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 327 Invalid, 9 Unknown, 0 Unchecked, 9.2s Time] [2023-11-25 00:03:09,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-25 00:03:09,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2023-11-25 00:03:09,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 24 states have (on average 1.375) internal successors, (33), 25 states have internal predecessors, (33), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-25 00:03:09,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2023-11-25 00:03:09,744 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 26 [2023-11-25 00:03:09,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:09,745 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2023-11-25 00:03:09,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 13 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-25 00:03:09,746 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2023-11-25 00:03:09,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-25 00:03:09,747 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:09,747 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:03:09,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7efad96-9769-4e93-ba4a-97b83cb268dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-25 00:03:09,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7efad96-9769-4e93-ba4a-97b83cb268dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:09,953 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:03:09,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:09,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1550957626, now seen corresponding path program 1 times [2023-11-25 00:03:09,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:09,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481143734] [2023-11-25 00:03:09,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:09,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:09,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:10,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-25 00:03:10,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:10,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481143734] [2023-11-25 00:03:10,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481143734] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:03:10,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353831491] [2023-11-25 00:03:10,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:10,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:10,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7efad96-9769-4e93-ba4a-97b83cb268dc/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:10,147 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7efad96-9769-4e93-ba4a-97b83cb268dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:10,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7efad96-9769-4e93-ba4a-97b83cb268dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-25 00:03:10,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:10,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-25 00:03:10,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:10,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-25 00:03:10,292 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:03:10,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-25 00:03:10,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353831491] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:03:10,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [121358734] [2023-11-25 00:03:10,347 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-11-25 00:03:10,347 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:03:10,348 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:03:10,348 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:03:10,348 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:03:10,903 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 68 for LOIs [2023-11-25 00:03:10,924 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 75 for LOIs [2023-11-25 00:03:10,974 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:03:13,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [121358734] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:13,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-25 00:03:13,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [7, 5, 5] total 30 [2023-11-25 00:03:13,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929805838] [2023-11-25 00:03:13,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:13,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-25 00:03:13,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:13,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-25 00:03:13,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=783, Unknown=7, NotChecked=0, Total=870 [2023-11-25 00:03:13,802 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 21 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-25 00:03:19,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-25 00:03:22,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-25 00:03:23,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:23,905 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2023-11-25 00:03:23,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-25 00:03:23,906 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 27 [2023-11-25 00:03:23,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:23,908 INFO L225 Difference]: With dead ends: 67 [2023-11-25 00:03:23,908 INFO L226 Difference]: Without dead ends: 58 [2023-11-25 00:03:23,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=116, Invalid=1129, Unknown=15, NotChecked=0, Total=1260 [2023-11-25 00:03:23,910 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 26 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 5 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:23,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 201 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 680 Invalid, 12 Unknown, 0 Unchecked, 6.3s Time] [2023-11-25 00:03:23,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-25 00:03:23,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 44. [2023-11-25 00:03:23,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-25 00:03:23,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 57 transitions. [2023-11-25 00:03:23,934 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 57 transitions. Word has length 27 [2023-11-25 00:03:23,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:23,935 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 57 transitions. [2023-11-25 00:03:23,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-25 00:03:23,935 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 57 transitions. [2023-11-25 00:03:23,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-25 00:03:23,936 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:23,937 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:03:23,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7efad96-9769-4e93-ba4a-97b83cb268dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-25 00:03:24,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7efad96-9769-4e93-ba4a-97b83cb268dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:24,141 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:03:24,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:24,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1377576029, now seen corresponding path program 1 times [2023-11-25 00:03:24,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:24,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029538879] [2023-11-25 00:03:24,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:24,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:24,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:24,352 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-25 00:03:24,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:24,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029538879] [2023-11-25 00:03:24,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029538879] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:03:24,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200220594] [2023-11-25 00:03:24,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:24,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:24,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7efad96-9769-4e93-ba4a-97b83cb268dc/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:24,355 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7efad96-9769-4e93-ba4a-97b83cb268dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:24,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7efad96-9769-4e93-ba4a-97b83cb268dc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-25 00:03:24,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:24,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-25 00:03:24,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:24,504 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-25 00:03:24,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:03:24,557 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-25 00:03:24,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200220594] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:03:24,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1138132527] [2023-11-25 00:03:24,560 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-11-25 00:03:24,560 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:03:24,561 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:03:24,561 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:03:24,561 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:03:25,124 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-11-25 00:03:25,161 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-11-25 00:03:25,193 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:03:25,864 WARN L876 $PredicateComparison]: unable to prove that (and (<= 0 |c_#Ultimate.meminit_#product|) (<= 0 |c_#Ultimate.meminit_#amountOfFields|) (= |c_#Ultimate.meminit_#ptr.offset| 0) (<= 1 |c_#StackHeapBarrier|) (<= |c_#Ultimate.meminit_#product| 4294967292) (<= |c_#Ultimate.meminit_#amountOfFields| 1073741823) (let ((.cse0 (exists ((|v_ULTIMATE.start_is_pow2_~x#1_25| Int)) (= (mod |v_ULTIMATE.start_is_pow2_~x#1_25| 4294967296) 1))) (.cse1 (* (mod |c_#Ultimate.meminit_#amountOfFields| 1073741824) 4)) (.cse3 (= |c_old(#memory_int)| |c_#memory_int|)) (.cse4 (<= (+ |c_#Ultimate.meminit_#ptr.base| 1) |c_#StackHeapBarrier|)) (.cse5 (= (* |c_#Ultimate.meminit_#amountOfFields| 4) |c_#Ultimate.meminit_#product|)) (.cse6 (not (= |c_#Ultimate.meminit_#ptr.base| 0)))) (or (and .cse0 (exists ((|v_#memory_int_95| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_12| Int) (|v_#length_14| (Array Int Int)) (|v_#valid_29| (Array Int Int))) (let ((.cse2 (store |v_#valid_29| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_12| 1))) (and (= (select |v_#valid_29| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_12|) 0) (= (store (store |v_#length_14| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_12| .cse1) |c_#Ultimate.meminit_#ptr.base| .cse1) |c_#length|) (= |c_#valid| (store .cse2 |c_#Ultimate.meminit_#ptr.base| 1)) (= 0 (select .cse2 |c_#Ultimate.meminit_#ptr.base|)) (<= (+ |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_12| 1) |c_#StackHeapBarrier|) (not (= |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_12| 0)) (= |c_old(#memory_int)| (store |v_#memory_int_95| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_12| ((as const (Array Int Int)) 0)))))) .cse3 .cse4 .cse5 .cse6) (and .cse0 (exists ((|v_#length_14| (Array Int Int))) (= |c_#length| (store |v_#length_14| |c_#Ultimate.meminit_#ptr.base| .cse1))) .cse3 .cse4 (exists ((|v_#valid_29| (Array Int Int))) (and (= |c_#valid| (store |v_#valid_29| |c_#Ultimate.meminit_#ptr.base| 1)) (= (select |v_#valid_29| |c_#Ultimate.meminit_#ptr.base|) 0))) .cse5 .cse6))) (= |c_#Ultimate.meminit_#sizeOfFields| 4)) is different from true [2023-11-25 00:03:27,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1138132527] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:27,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-25 00:03:27,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [7, 5, 5] total 30 [2023-11-25 00:03:27,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367406818] [2023-11-25 00:03:27,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:27,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-25 00:03:27,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:27,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-25 00:03:27,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=735, Unknown=5, NotChecked=54, Total=870 [2023-11-25 00:03:27,382 INFO L87 Difference]: Start difference. First operand 44 states and 57 transitions. Second operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-25 00:03:31,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]