./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.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_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/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_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/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_c5274906-0031-4dfc-bfcf-03b3bc70be6d/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 9f971bd1a6fba471cdece6d295ca31488341eb806ea8364f7549d05755c7a031 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:55:20,051 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:55:20,169 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-11-24 23:55:20,177 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:55:20,178 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:55:20,217 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:55:20,218 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:55:20,218 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:55:20,219 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:55:20,224 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:55:20,225 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:55:20,225 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:55:20,226 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:55:20,227 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:55:20,228 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:55:20,228 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:55:20,229 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:55:20,229 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:55:20,230 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:55:20,230 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:55:20,231 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:55:20,231 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:55:20,232 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:55:20,233 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:55:20,233 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:55:20,234 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:55:20,234 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:55:20,235 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:55:20,235 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:55:20,235 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:55:20,237 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:55:20,237 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-24 23:55:20,237 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 23:55:20,238 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:55:20,238 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:55:20,238 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:55:20,239 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:55:20,239 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:55:20,239 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:55:20,239 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:55:20,240 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:55:20,241 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:55:20,241 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:55:20,241 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:55:20,242 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:55:20,242 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:55:20,242 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:55:20,242 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:55:20,243 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:55:20,243 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_c5274906-0031-4dfc-bfcf-03b3bc70be6d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9f971bd1a6fba471cdece6d295ca31488341eb806ea8364f7549d05755c7a031 [2023-11-24 23:55:20,562 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:55:20,595 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:55:20,598 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:55:20,599 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:55:20,599 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:55:20,601 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c [2023-11-24 23:55:23,679 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:55:23,863 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:55:23,864 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c [2023-11-24 23:55:23,874 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/data/de67c297e/e7a0877babff448a8fa1fbfdb2d11250/FLAG7c84bc80f [2023-11-24 23:55:23,893 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/data/de67c297e/e7a0877babff448a8fa1fbfdb2d11250 [2023-11-24 23:55:23,899 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:55:23,902 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:55:23,906 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:55:23,907 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:55:23,912 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:55:23,913 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:55:23" (1/1) ... [2023-11-24 23:55:23,915 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f56ddc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:23, skipping insertion in model container [2023-11-24 23:55:23,916 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:55:23" (1/1) ... [2023-11-24 23:55:23,944 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:55:24,111 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:55:24,122 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:55:24,142 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:55:24,158 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:55:24,158 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:24 WrapperNode [2023-11-24 23:55:24,159 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:55:24,160 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:55:24,160 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:55:24,160 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:55:24,168 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:24" (1/1) ... [2023-11-24 23:55:24,176 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:24" (1/1) ... [2023-11-24 23:55:24,201 INFO L138 Inliner]: procedures = 14, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 103 [2023-11-24 23:55:24,201 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:55:24,202 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:55:24,202 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:55:24,203 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:55:24,213 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:24" (1/1) ... [2023-11-24 23:55:24,213 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:24" (1/1) ... [2023-11-24 23:55:24,215 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:24" (1/1) ... [2023-11-24 23:55:24,215 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:24" (1/1) ... [2023-11-24 23:55:24,220 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:24" (1/1) ... [2023-11-24 23:55:24,224 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:24" (1/1) ... [2023-11-24 23:55:24,225 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:24" (1/1) ... [2023-11-24 23:55:24,226 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:24" (1/1) ... [2023-11-24 23:55:24,229 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:55:24,230 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:55:24,230 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:55:24,230 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:55:24,231 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:24" (1/1) ... [2023-11-24 23:55:24,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:55:24,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:55:24,266 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:55:24,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:55:24,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:55:24,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:55:24,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:55:24,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:55:24,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-24 23:55:24,306 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-24 23:55:24,370 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:55:24,372 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:55:24,692 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:55:24,729 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:55:24,729 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 23:55:24,731 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:55:24 BoogieIcfgContainer [2023-11-24 23:55:24,732 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:55:24,734 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:55:24,735 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:55:24,738 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:55:24,738 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:55:23" (1/3) ... [2023-11-24 23:55:24,739 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61057219 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:55:24, skipping insertion in model container [2023-11-24 23:55:24,740 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:24" (2/3) ... [2023-11-24 23:55:24,741 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61057219 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:55:24, skipping insertion in model container [2023-11-24 23:55:24,742 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:55:24" (3/3) ... [2023-11-24 23:55:24,744 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound10.c [2023-11-24 23:55:24,766 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:55:24,767 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-11-24 23:55:24,821 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:55:24,828 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;@5b3fede8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:55:24,829 INFO L358 AbstractCegarLoop]: Starting to check reachability of 28 error locations. [2023-11-24 23:55:24,833 INFO L276 IsEmpty]: Start isEmpty. Operand has 75 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 66 states have internal predecessors, (73), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-24 23:55:24,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-24 23:55:24,840 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:24,841 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-24 23:55:24,841 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 25 more)] === [2023-11-24 23:55:24,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:24,847 INFO L85 PathProgramCache]: Analyzing trace with hash 163595, now seen corresponding path program 1 times [2023-11-24 23:55:24,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:24,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855838689] [2023-11-24 23:55:24,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:24,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:24,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:25,155 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 23:55:25,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:25,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855838689] [2023-11-24 23:55:25,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855838689] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:55:25,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:55:25,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:55:25,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822955963] [2023-11-24 23:55:25,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:55:25,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:55:25,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:25,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:55:25,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:55:25,196 INFO L87 Difference]: Start difference. First operand has 75 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 66 states have internal predecessors, (73), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:55:25,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:25,286 INFO L93 Difference]: Finished difference Result 133 states and 153 transitions. [2023-11-24 23:55:25,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:55:25,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-24 23:55:25,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:25,296 INFO L225 Difference]: With dead ends: 133 [2023-11-24 23:55:25,297 INFO L226 Difference]: Without dead ends: 75 [2023-11-24 23:55:25,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 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 23:55:25,304 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 4 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:25,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 230 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:55:25,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-24 23:55:25,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-11-24 23:55:25,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 68 states have internal predecessors, (73), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-24 23:55:25,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 83 transitions. [2023-11-24 23:55:25,350 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 83 transitions. Word has length 3 [2023-11-24 23:55:25,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:25,351 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 83 transitions. [2023-11-24 23:55:25,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:55:25,352 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 83 transitions. [2023-11-24 23:55:25,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 23:55:25,353 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:25,353 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:55:25,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:55:25,354 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 25 more)] === [2023-11-24 23:55:25,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:25,355 INFO L85 PathProgramCache]: Analyzing trace with hash 154661854, now seen corresponding path program 1 times [2023-11-24 23:55:25,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:25,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720617939] [2023-11-24 23:55:25,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:25,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:25,376 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:55:25,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [167983594] [2023-11-24 23:55:25,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:25,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:25,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:55:25,381 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:55:25,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:55:25,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:25,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 23:55:25,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:55:25,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 23:55:25,608 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:55:25,608 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:25,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720617939] [2023-11-24 23:55:25,609 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:55:25,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167983594] [2023-11-24 23:55:25,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167983594] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:55:25,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:55:25,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:55:25,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924743335] [2023-11-24 23:55:25,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:55:25,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:55:25,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:25,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:55:25,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:55:25,621 INFO L87 Difference]: Start difference. First operand 75 states and 83 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 23:55:25,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:25,784 INFO L93 Difference]: Finished difference Result 167 states and 186 transitions. [2023-11-24 23:55:25,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:55:25,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 12 [2023-11-24 23:55:25,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:25,789 INFO L225 Difference]: With dead ends: 167 [2023-11-24 23:55:25,789 INFO L226 Difference]: Without dead ends: 116 [2023-11-24 23:55:25,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 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 23:55:25,792 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 36 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:25,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 115 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:55:25,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-11-24 23:55:25,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 98. [2023-11-24 23:55:25,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 59 states have (on average 1.7457627118644068) internal successors, (103), 86 states have internal predecessors, (103), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-24 23:55:25,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 123 transitions. [2023-11-24 23:55:25,821 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 123 transitions. Word has length 12 [2023-11-24 23:55:25,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:25,822 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 123 transitions. [2023-11-24 23:55:25,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 23:55:25,823 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 123 transitions. [2023-11-24 23:55:25,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-24 23:55:25,824 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:25,824 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:55:25,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-24 23:55:26,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:26,030 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 25 more)] === [2023-11-24 23:55:26,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:26,031 INFO L85 PathProgramCache]: Analyzing trace with hash 499550230, now seen corresponding path program 1 times [2023-11-24 23:55:26,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:26,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026471367] [2023-11-24 23:55:26,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:26,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:26,047 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:55:26,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [837499764] [2023-11-24 23:55:26,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:26,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:26,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:55:26,049 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:55:26,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:55:26,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:26,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 23:55:26,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:55:26,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 23:55:26,180 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:55:26,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:26,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026471367] [2023-11-24 23:55:26,181 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:55:26,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837499764] [2023-11-24 23:55:26,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837499764] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:55:26,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:55:26,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:55:26,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326618383] [2023-11-24 23:55:26,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:55:26,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:55:26,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:26,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:55:26,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:55:26,185 INFO L87 Difference]: Start difference. First operand 98 states and 123 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 23:55:26,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:26,274 INFO L93 Difference]: Finished difference Result 116 states and 130 transitions. [2023-11-24 23:55:26,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:55:26,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2023-11-24 23:55:26,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:26,276 INFO L225 Difference]: With dead ends: 116 [2023-11-24 23:55:26,276 INFO L226 Difference]: Without dead ends: 114 [2023-11-24 23:55:26,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 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 23:55:26,278 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 33 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:26,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 114 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:55:26,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-11-24 23:55:26,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 98. [2023-11-24 23:55:26,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 59 states have (on average 1.7118644067796611) internal successors, (101), 86 states have internal predecessors, (101), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-24 23:55:26,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2023-11-24 23:55:26,291 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 13 [2023-11-24 23:55:26,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:26,292 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2023-11-24 23:55:26,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 23:55:26,292 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2023-11-24 23:55:26,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-24 23:55:26,293 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:26,293 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:55:26,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 23:55:26,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:26,499 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 25 more)] === [2023-11-24 23:55:26,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:26,499 INFO L85 PathProgramCache]: Analyzing trace with hash -812715847, now seen corresponding path program 1 times [2023-11-24 23:55:26,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:26,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756266434] [2023-11-24 23:55:26,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:26,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:26,516 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:55:26,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2125457925] [2023-11-24 23:55:26,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:26,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:26,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:55:26,521 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:55:26,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 23:55:26,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:26,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 23:55:26,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:55:26,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 23:55:26,639 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:55:26,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:26,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756266434] [2023-11-24 23:55:26,640 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:55:26,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125457925] [2023-11-24 23:55:26,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125457925] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:55:26,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:55:26,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:55:26,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696746471] [2023-11-24 23:55:26,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:55:26,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:55:26,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:26,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:55:26,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:55:26,645 INFO L87 Difference]: Start difference. First operand 98 states and 121 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 23:55:26,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:26,724 INFO L93 Difference]: Finished difference Result 130 states and 157 transitions. [2023-11-24 23:55:26,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:55:26,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 18 [2023-11-24 23:55:26,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:26,730 INFO L225 Difference]: With dead ends: 130 [2023-11-24 23:55:26,730 INFO L226 Difference]: Without dead ends: 128 [2023-11-24 23:55:26,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 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 23:55:26,735 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 42 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:26,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 97 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:55:26,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-11-24 23:55:26,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 111. [2023-11-24 23:55:26,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 71 states have (on average 1.704225352112676) internal successors, (121), 97 states have internal predecessors, (121), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-24 23:55:26,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 145 transitions. [2023-11-24 23:55:26,764 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 145 transitions. Word has length 18 [2023-11-24 23:55:26,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:26,765 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 145 transitions. [2023-11-24 23:55:26,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 23:55:26,765 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 145 transitions. [2023-11-24 23:55:26,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-24 23:55:26,766 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:26,767 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:55:26,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-24 23:55:26,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:26,971 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 25 more)] === [2023-11-24 23:55:26,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:26,972 INFO L85 PathProgramCache]: Analyzing trace with hash 575611075, now seen corresponding path program 1 times [2023-11-24 23:55:26,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:26,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125551135] [2023-11-24 23:55:26,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:26,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:26,986 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:55:26,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113370506] [2023-11-24 23:55:26,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:26,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:26,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:55:26,988 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:55:26,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 23:55:27,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:27,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 23:55:27,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:55:27,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 23:55:27,091 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:55:27,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:27,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125551135] [2023-11-24 23:55:27,092 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:55:27,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113370506] [2023-11-24 23:55:27,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113370506] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:55:27,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:55:27,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:55:27,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303720209] [2023-11-24 23:55:27,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:55:27,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:55:27,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:27,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:55:27,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:55:27,095 INFO L87 Difference]: Start difference. First operand 111 states and 145 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 23:55:27,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:27,154 INFO L93 Difference]: Finished difference Result 111 states and 145 transitions. [2023-11-24 23:55:27,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 23:55:27,156 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 19 [2023-11-24 23:55:27,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:27,157 INFO L225 Difference]: With dead ends: 111 [2023-11-24 23:55:27,157 INFO L226 Difference]: Without dead ends: 109 [2023-11-24 23:55:27,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:55:27,158 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 69 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:27,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 186 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:55:27,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-24 23:55:27,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2023-11-24 23:55:27,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 71 states have (on average 1.647887323943662) internal successors, (117), 95 states have internal predecessors, (117), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-24 23:55:27,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 141 transitions. [2023-11-24 23:55:27,170 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 141 transitions. Word has length 19 [2023-11-24 23:55:27,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:27,171 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 141 transitions. [2023-11-24 23:55:27,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 23:55:27,171 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 141 transitions. [2023-11-24 23:55:27,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-24 23:55:27,172 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:27,172 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:55:27,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 23:55:27,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:27,377 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 25 more)] === [2023-11-24 23:55:27,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:27,378 INFO L85 PathProgramCache]: Analyzing trace with hash 575612581, now seen corresponding path program 1 times [2023-11-24 23:55:27,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:27,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730369625] [2023-11-24 23:55:27,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:27,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:27,390 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:55:27,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [732212671] [2023-11-24 23:55:27,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:27,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:27,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:55:27,392 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:55:27,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 23:55:27,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:27,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 23:55:27,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:55:27,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 23:55:27,482 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:55:27,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:27,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730369625] [2023-11-24 23:55:27,482 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:55:27,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732212671] [2023-11-24 23:55:27,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732212671] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:55:27,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:55:27,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:55:27,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066212132] [2023-11-24 23:55:27,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:55:27,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:55:27,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:27,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:55:27,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:55:27,484 INFO L87 Difference]: Start difference. First operand 109 states and 141 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 23:55:27,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:27,533 INFO L93 Difference]: Finished difference Result 123 states and 148 transitions. [2023-11-24 23:55:27,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:55:27,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 19 [2023-11-24 23:55:27,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:27,535 INFO L225 Difference]: With dead ends: 123 [2023-11-24 23:55:27,535 INFO L226 Difference]: Without dead ends: 122 [2023-11-24 23:55:27,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 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 23:55:27,537 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 25 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:27,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 120 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:55:27,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-11-24 23:55:27,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 109. [2023-11-24 23:55:27,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 71 states have (on average 1.6338028169014085) internal successors, (116), 95 states have internal predecessors, (116), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-24 23:55:27,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 140 transitions. [2023-11-24 23:55:27,555 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 140 transitions. Word has length 19 [2023-11-24 23:55:27,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:27,556 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 140 transitions. [2023-11-24 23:55:27,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 23:55:27,556 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 140 transitions. [2023-11-24 23:55:27,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-24 23:55:27,557 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:27,557 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:55:27,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 23:55:27,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:27,763 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 25 more)] === [2023-11-24 23:55:27,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:27,763 INFO L85 PathProgramCache]: Analyzing trace with hash 664074218, now seen corresponding path program 1 times [2023-11-24 23:55:27,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:27,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812822624] [2023-11-24 23:55:27,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:27,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:27,776 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:55:27,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [403760973] [2023-11-24 23:55:27,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:27,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:27,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:55:27,787 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:55:27,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 23:55:27,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:27,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 23:55:27,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:55:27,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 23:55:27,887 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:55:27,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:27,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812822624] [2023-11-24 23:55:27,888 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:55:27,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403760973] [2023-11-24 23:55:27,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403760973] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:55:27,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:55:27,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:55:27,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382010990] [2023-11-24 23:55:27,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:55:27,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:55:27,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:27,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:55:27,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:55:27,890 INFO L87 Difference]: Start difference. First operand 109 states and 140 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 23:55:27,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:27,967 INFO L93 Difference]: Finished difference Result 124 states and 152 transitions. [2023-11-24 23:55:27,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 23:55:27,968 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2023-11-24 23:55:27,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:27,969 INFO L225 Difference]: With dead ends: 124 [2023-11-24 23:55:27,969 INFO L226 Difference]: Without dead ends: 115 [2023-11-24 23:55:27,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:55:27,971 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 14 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:27,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 324 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:55:27,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-11-24 23:55:27,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2023-11-24 23:55:27,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 72 states have (on average 1.5972222222222223) internal successors, (115), 96 states have internal predecessors, (115), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-24 23:55:27,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 139 transitions. [2023-11-24 23:55:27,983 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 139 transitions. Word has length 20 [2023-11-24 23:55:27,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:27,984 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 139 transitions. [2023-11-24 23:55:27,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 23:55:27,984 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 139 transitions. [2023-11-24 23:55:27,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-24 23:55:27,985 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:27,985 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:55:28,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 23:55:28,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:28,193 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 25 more)] === [2023-11-24 23:55:28,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:28,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1774800980, now seen corresponding path program 1 times [2023-11-24 23:55:28,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:28,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310714660] [2023-11-24 23:55:28,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:28,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:28,206 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:55:28,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [629537639] [2023-11-24 23:55:28,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:28,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:28,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:55:28,208 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:55:28,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 23:55:28,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:28,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 23:55:28,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:55:28,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 23:55:28,382 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:55:28,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:28,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310714660] [2023-11-24 23:55:28,383 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:55:28,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629537639] [2023-11-24 23:55:28,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629537639] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:55:28,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:55:28,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:55:28,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321706483] [2023-11-24 23:55:28,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:55:28,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:55:28,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:28,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:55:28,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:55:28,385 INFO L87 Difference]: Start difference. First operand 111 states and 139 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 23:55:28,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:28,469 INFO L93 Difference]: Finished difference Result 156 states and 188 transitions. [2023-11-24 23:55:28,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:55:28,470 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), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2023-11-24 23:55:28,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:28,472 INFO L225 Difference]: With dead ends: 156 [2023-11-24 23:55:28,472 INFO L226 Difference]: Without dead ends: 155 [2023-11-24 23:55:28,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 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 23:55:28,474 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 51 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:28,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 77 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:55:28,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-11-24 23:55:28,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 129. [2023-11-24 23:55:28,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 88 states have (on average 1.6136363636363635) internal successors, (142), 112 states have internal predecessors, (142), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-24 23:55:28,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 170 transitions. [2023-11-24 23:55:28,498 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 170 transitions. Word has length 22 [2023-11-24 23:55:28,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:28,499 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 170 transitions. [2023-11-24 23:55:28,499 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), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 23:55:28,499 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 170 transitions. [2023-11-24 23:55:28,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-24 23:55:28,500 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:28,500 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:55:28,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 23:55:28,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:28,706 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 25 more)] === [2023-11-24 23:55:28,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:28,706 INFO L85 PathProgramCache]: Analyzing trace with hash 815744554, now seen corresponding path program 1 times [2023-11-24 23:55:28,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:28,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321764829] [2023-11-24 23:55:28,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:28,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:28,717 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:55:28,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1064067574] [2023-11-24 23:55:28,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:28,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:28,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:55:28,719 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:55:28,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 23:55:28,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:28,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 23:55:28,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:55:28,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 23:55:28,903 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:55:28,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:28,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321764829] [2023-11-24 23:55:28,904 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:55:28,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064067574] [2023-11-24 23:55:28,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064067574] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:55:28,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:55:28,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:55:28,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605238562] [2023-11-24 23:55:28,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:55:28,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:55:28,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:28,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:55:28,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:55:28,908 INFO L87 Difference]: Start difference. First operand 129 states and 170 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 23:55:28,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:28,989 INFO L93 Difference]: Finished difference Result 155 states and 185 transitions. [2023-11-24 23:55:28,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:55:28,989 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2023-11-24 23:55:28,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:28,993 INFO L225 Difference]: With dead ends: 155 [2023-11-24 23:55:28,993 INFO L226 Difference]: Without dead ends: 154 [2023-11-24 23:55:28,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 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 23:55:28,996 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 49 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:28,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 78 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:55:28,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-11-24 23:55:29,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 129. [2023-11-24 23:55:29,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 88 states have (on average 1.5795454545454546) internal successors, (139), 112 states have internal predecessors, (139), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-24 23:55:29,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 167 transitions. [2023-11-24 23:55:29,012 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 167 transitions. Word has length 23 [2023-11-24 23:55:29,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:29,013 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 167 transitions. [2023-11-24 23:55:29,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 23:55:29,013 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 167 transitions. [2023-11-24 23:55:29,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-24 23:55:29,014 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:29,015 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:55:29,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-24 23:55:29,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:29,220 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 25 more)] === [2023-11-24 23:55:29,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:29,221 INFO L85 PathProgramCache]: Analyzing trace with hash -481722514, now seen corresponding path program 1 times [2023-11-24 23:55:29,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:29,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922329060] [2023-11-24 23:55:29,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:29,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:29,232 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:55:29,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [345503538] [2023-11-24 23:55:29,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:29,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:29,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:55:29,233 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:55:29,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-24 23:55:29,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:29,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 23:55:29,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:55:29,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 23:55:29,376 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:55:29,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:29,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922329060] [2023-11-24 23:55:29,376 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:55:29,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345503538] [2023-11-24 23:55:29,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345503538] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:55:29,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:55:29,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:55:29,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991454311] [2023-11-24 23:55:29,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:55:29,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:55:29,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:29,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:55:29,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:55:29,380 INFO L87 Difference]: Start difference. First operand 129 states and 167 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 23:55:29,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:29,451 INFO L93 Difference]: Finished difference Result 150 states and 178 transitions. [2023-11-24 23:55:29,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:55:29,452 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), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2023-11-24 23:55:29,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:29,453 INFO L225 Difference]: With dead ends: 150 [2023-11-24 23:55:29,454 INFO L226 Difference]: Without dead ends: 146 [2023-11-24 23:55:29,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 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 23:55:29,455 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 40 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:29,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 84 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:55:29,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-11-24 23:55:29,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 132. [2023-11-24 23:55:29,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 91 states have (on average 1.5274725274725274) internal successors, (139), 115 states have internal predecessors, (139), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-24 23:55:29,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 167 transitions. [2023-11-24 23:55:29,471 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 167 transitions. Word has length 24 [2023-11-24 23:55:29,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:29,471 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 167 transitions. [2023-11-24 23:55:29,471 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), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 23:55:29,472 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 167 transitions. [2023-11-24 23:55:29,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-24 23:55:29,474 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:29,475 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:55:29,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-24 23:55:29,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-24 23:55:29,680 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 25 more)] === [2023-11-24 23:55:29,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:29,681 INFO L85 PathProgramCache]: Analyzing trace with hash -328423168, now seen corresponding path program 1 times [2023-11-24 23:55:29,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:29,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57994932] [2023-11-24 23:55:29,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:29,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:29,700 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:55:29,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [429178899] [2023-11-24 23:55:29,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:29,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:29,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:55:29,706 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:55:29,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-24 23:55:29,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:29,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 23:55:29,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:55:29,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 23:55:29,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:55:29,922 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 23:55:29,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:29,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57994932] [2023-11-24 23:55:29,923 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:55:29,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429178899] [2023-11-24 23:55:29,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429178899] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:55:29,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [724013471] [2023-11-24 23:55:29,945 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-11-24 23:55:29,945 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:55:29,952 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:55:29,957 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:55:29,957 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:55:33,244 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-11-24 23:55:33,261 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:55:35,481 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3595#(and (<= 1 |#StackHeapBarrier|) (= ~counter~0 |ULTIMATE.start_main_#t~post5#1|) (<= 0 (+ 1073741823 (div (* (- 1) |ULTIMATE.start_main_~d~0#1|) 2))) (<= |ULTIMATE.start_main_~r~0#1| 2147483647) (<= 2147483647 |ULTIMATE.start_main_#t~post5#1|) (<= 0 (+ |ULTIMATE.start_main_~r~0#1| (div (* (- 1) |ULTIMATE.start_main_~d~0#1|) 2))) (<= (div (* (- 1) |ULTIMATE.start_main_~d~0#1|) 2) 1073741824) (= |ULTIMATE.start_main_~q~0#1| 0) (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|) (= (+ |ULTIMATE.start_main_~p~0#1| (* 2 (div (* (- 1) |ULTIMATE.start_main_~d~0#1|) 2))) 0) (= |ULTIMATE.start_main_~B~0#1| 1) (= (mod |ULTIMATE.start_main_~d~0#1| 2) 0))' at error location [2023-11-24 23:55:35,481 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-24 23:55:35,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 23:55:35,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2023-11-24 23:55:35,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569675743] [2023-11-24 23:55:35,481 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 23:55:35,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 23:55:35,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:35,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 23:55:35,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2023-11-24 23:55:35,483 INFO L87 Difference]: Start difference. First operand 132 states and 167 transitions. Second operand has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-24 23:55:35,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:35,721 INFO L93 Difference]: Finished difference Result 268 states and 337 transitions. [2023-11-24 23:55:35,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 23:55:35,722 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 24 [2023-11-24 23:55:35,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:35,723 INFO L225 Difference]: With dead ends: 268 [2023-11-24 23:55:35,724 INFO L226 Difference]: Without dead ends: 185 [2023-11-24 23:55:35,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=177, Invalid=753, Unknown=0, NotChecked=0, Total=930 [2023-11-24 23:55:35,727 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 66 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:35,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 288 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:55:35,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-11-24 23:55:35,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 167. [2023-11-24 23:55:35,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 118 states have (on average 1.5169491525423728) internal successors, (179), 142 states have internal predecessors, (179), 20 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-24 23:55:35,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 219 transitions. [2023-11-24 23:55:35,744 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 219 transitions. Word has length 24 [2023-11-24 23:55:35,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:35,746 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 219 transitions. [2023-11-24 23:55:35,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-24 23:55:35,746 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 219 transitions. [2023-11-24 23:55:35,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-24 23:55:35,753 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:35,753 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:55:35,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-24 23:55:35,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:35,960 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 25 more)] === [2023-11-24 23:55:35,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:35,961 INFO L85 PathProgramCache]: Analyzing trace with hash -2048495956, now seen corresponding path program 1 times [2023-11-24 23:55:35,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:35,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823381119] [2023-11-24 23:55:35,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:35,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:35,973 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:55:35,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817123405] [2023-11-24 23:55:35,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:35,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:35,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:55:35,983 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:55:35,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-24 23:55:36,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:36,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 23:55:36,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:55:36,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 23:55:36,144 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:55:36,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:36,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823381119] [2023-11-24 23:55:36,144 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:55:36,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817123405] [2023-11-24 23:55:36,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817123405] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:55:36,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:55:36,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:55:36,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999427112] [2023-11-24 23:55:36,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:55:36,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:55:36,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:36,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:55:36,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:55:36,147 INFO L87 Difference]: Start difference. First operand 167 states and 219 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 23:55:36,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:36,303 INFO L93 Difference]: Finished difference Result 173 states and 223 transitions. [2023-11-24 23:55:36,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:55:36,304 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2023-11-24 23:55:36,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:36,306 INFO L225 Difference]: With dead ends: 173 [2023-11-24 23:55:36,306 INFO L226 Difference]: Without dead ends: 172 [2023-11-24 23:55:36,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:55:36,307 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 26 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:36,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 170 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:55:36,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-11-24 23:55:36,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 167. [2023-11-24 23:55:36,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 118 states have (on average 1.5084745762711864) internal successors, (178), 142 states have internal predecessors, (178), 20 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-24 23:55:36,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 218 transitions. [2023-11-24 23:55:36,322 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 218 transitions. Word has length 25 [2023-11-24 23:55:36,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:36,322 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 218 transitions. [2023-11-24 23:55:36,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 23:55:36,323 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 218 transitions. [2023-11-24 23:55:36,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-24 23:55:36,323 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:36,324 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:55:36,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-24 23:55:36,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-24 23:55:36,529 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 25 more)] === [2023-11-24 23:55:36,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:36,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1735497824, now seen corresponding path program 1 times [2023-11-24 23:55:36,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:36,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173860875] [2023-11-24 23:55:36,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:36,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:36,541 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:55:36,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1588144644] [2023-11-24 23:55:36,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:36,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:36,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:55:36,542 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:55:36,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-24 23:55:36,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:36,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 23:55:36,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:55:36,699 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-24 23:55:36,699 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:55:36,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:36,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173860875] [2023-11-24 23:55:36,700 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:55:36,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588144644] [2023-11-24 23:55:36,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588144644] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:55:36,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:55:36,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:55:36,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81788272] [2023-11-24 23:55:36,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:55:36,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:55:36,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:36,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:55:36,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:55:36,702 INFO L87 Difference]: Start difference. First operand 167 states and 218 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 23:55:36,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:36,792 INFO L93 Difference]: Finished difference Result 179 states and 226 transitions. [2023-11-24 23:55:36,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:55:36,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2023-11-24 23:55:36,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:36,797 INFO L225 Difference]: With dead ends: 179 [2023-11-24 23:55:36,798 INFO L226 Difference]: Without dead ends: 170 [2023-11-24 23:55:36,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:55:36,799 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 90 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:36,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 107 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:55:36,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-11-24 23:55:36,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 163. [2023-11-24 23:55:36,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 118 states have (on average 1.4067796610169492) internal successors, (166), 138 states have internal predecessors, (166), 20 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-24 23:55:36,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 206 transitions. [2023-11-24 23:55:36,816 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 206 transitions. Word has length 32 [2023-11-24 23:55:36,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:36,816 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 206 transitions. [2023-11-24 23:55:36,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 23:55:36,817 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 206 transitions. [2023-11-24 23:55:36,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-24 23:55:36,818 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:36,818 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:55:36,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-24 23:55:37,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-24 23:55:37,024 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 25 more)] === [2023-11-24 23:55:37,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:37,024 INFO L85 PathProgramCache]: Analyzing trace with hash -2034142252, now seen corresponding path program 1 times [2023-11-24 23:55:37,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:37,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618144836] [2023-11-24 23:55:37,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:37,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:37,033 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:55:37,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [604717539] [2023-11-24 23:55:37,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:37,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:37,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:55:37,034 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:55:37,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-24 23:55:37,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:37,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 23:55:37,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:55:37,186 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-24 23:55:37,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:55:37,333 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:37,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618144836] [2023-11-24 23:55:37,333 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:55:37,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604717539] [2023-11-24 23:55:37,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604717539] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:55:37,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [595570237] [2023-11-24 23:55:37,336 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-11-24 23:55:37,336 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:55:37,336 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:55:37,336 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:55:37,336 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:55:39,633 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-11-24 23:55:39,635 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:55:41,508 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5284#(and (<= 1 |#StackHeapBarrier|) (<= 2147483648 |ULTIMATE.start_main_~p~0#1|) (<= |ULTIMATE.start_main_~r~0#1| 2147483647) (<= 1 ~counter~0) (= |ULTIMATE.start_main_~q~0#1| 0) (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1) (<= 0 (+ |ULTIMATE.start_main_~r~0#1| 2147483648)))' at error location [2023-11-24 23:55:41,509 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-24 23:55:41,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:55:41,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2023-11-24 23:55:41,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662454569] [2023-11-24 23:55:41,509 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-24 23:55:41,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:55:41,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:41,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:55:41,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2023-11-24 23:55:41,511 INFO L87 Difference]: Start difference. First operand 163 states and 206 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 23:55:41,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:41,635 INFO L93 Difference]: Finished difference Result 255 states and 314 transitions. [2023-11-24 23:55:41,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:55:41,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2023-11-24 23:55:41,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:41,638 INFO L225 Difference]: With dead ends: 255 [2023-11-24 23:55:41,639 INFO L226 Difference]: Without dead ends: 251 [2023-11-24 23:55:41,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2023-11-24 23:55:41,640 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 103 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:41,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 120 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:55:41,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2023-11-24 23:55:41,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 217. [2023-11-24 23:55:41,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 166 states have (on average 1.4216867469879517) internal successors, (236), 186 states have internal predecessors, (236), 26 states have call successors, (26), 4 states have call predecessors, (26), 4 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-24 23:55:41,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 288 transitions. [2023-11-24 23:55:41,658 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 288 transitions. Word has length 33 [2023-11-24 23:55:41,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:41,659 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 288 transitions. [2023-11-24 23:55:41,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 23:55:41,659 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 288 transitions. [2023-11-24 23:55:41,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-24 23:55:41,660 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:41,660 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:55:41,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-24 23:55:41,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-24 23:55:41,866 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 25 more)] === [2023-11-24 23:55:41,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:41,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1641811385, now seen corresponding path program 1 times [2023-11-24 23:55:41,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:41,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120490725] [2023-11-24 23:55:41,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:41,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:41,875 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:55:41,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [592395254] [2023-11-24 23:55:41,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:41,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:41,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:55:41,877 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:55:41,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-24 23:55:41,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:41,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 23:55:41,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:55:42,023 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-24 23:55:42,023 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:55:42,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:42,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120490725] [2023-11-24 23:55:42,024 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:55:42,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592395254] [2023-11-24 23:55:42,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592395254] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:55:42,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:55:42,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:55:42,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68639119] [2023-11-24 23:55:42,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:55:42,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:55:42,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:42,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:55:42,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:55:42,026 INFO L87 Difference]: Start difference. First operand 217 states and 288 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 23:55:42,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:42,138 INFO L93 Difference]: Finished difference Result 222 states and 292 transitions. [2023-11-24 23:55:42,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:55:42,138 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2023-11-24 23:55:42,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:42,140 INFO L225 Difference]: With dead ends: 222 [2023-11-24 23:55:42,141 INFO L226 Difference]: Without dead ends: 204 [2023-11-24 23:55:42,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:55:42,142 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 2 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:42,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 181 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:55:42,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-11-24 23:55:42,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2023-11-24 23:55:42,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 155 states have (on average 1.4451612903225806) internal successors, (224), 175 states have internal predecessors, (224), 24 states have call successors, (24), 4 states have call predecessors, (24), 4 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-24 23:55:42,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 272 transitions. [2023-11-24 23:55:42,160 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 272 transitions. Word has length 38 [2023-11-24 23:55:42,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:42,160 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 272 transitions. [2023-11-24 23:55:42,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 23:55:42,161 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 272 transitions. [2023-11-24 23:55:42,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-24 23:55:42,161 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:42,161 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-24 23:55:42,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-24 23:55:42,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-24 23:55:42,367 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 25 more)] === [2023-11-24 23:55:42,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:42,367 INFO L85 PathProgramCache]: Analyzing trace with hash 51235811, now seen corresponding path program 1 times [2023-11-24 23:55:42,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:42,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078467674] [2023-11-24 23:55:42,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:42,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:42,376 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:55:42,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2101495278] [2023-11-24 23:55:42,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:42,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:42,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:55:42,378 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:55:42,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-24 23:55:42,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:42,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 23:55:42,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:55:42,473 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-24 23:55:42,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:55:42,533 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-24 23:55:42,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:42,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078467674] [2023-11-24 23:55:42,534 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:55:42,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101495278] [2023-11-24 23:55:42,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101495278] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:55:42,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1238444737] [2023-11-24 23:55:42,537 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-11-24 23:55:42,537 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:55:42,537 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:55:42,537 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:55:42,537 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:55:44,680 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-11-24 23:55:44,681 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:55:46,390 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6711#(and (<= 1 |#StackHeapBarrier|) (<= 1073741824 |ULTIMATE.start_main_~d~0#1|) (<= |ULTIMATE.start_main_~r~0#1| 2147483647) (<= 1 ~counter~0) (= |ULTIMATE.start_main_~q~0#1| 0) (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|) (<= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~r~0#1|) (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1))' at error location [2023-11-24 23:55:46,390 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-24 23:55:46,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 23:55:46,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-11-24 23:55:46,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888592949] [2023-11-24 23:55:46,391 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 23:55:46,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:55:46,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:46,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:55:46,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2023-11-24 23:55:46,392 INFO L87 Difference]: Start difference. First operand 204 states and 272 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-24 23:55:46,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:46,585 INFO L93 Difference]: Finished difference Result 345 states and 429 transitions. [2023-11-24 23:55:46,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:55:46,586 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 39 [2023-11-24 23:55:46,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:46,588 INFO L225 Difference]: With dead ends: 345 [2023-11-24 23:55:46,588 INFO L226 Difference]: Without dead ends: 343 [2023-11-24 23:55:46,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2023-11-24 23:55:46,589 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 253 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:46,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 216 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:55:46,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2023-11-24 23:55:46,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 267. [2023-11-24 23:55:46,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 209 states have (on average 1.4545454545454546) internal successors, (304), 229 states have internal predecessors, (304), 33 states have call successors, (33), 4 states have call predecessors, (33), 4 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-24 23:55:46,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 370 transitions. [2023-11-24 23:55:46,611 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 370 transitions. Word has length 39 [2023-11-24 23:55:46,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:46,611 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 370 transitions. [2023-11-24 23:55:46,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-24 23:55:46,612 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 370 transitions. [2023-11-24 23:55:46,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-24 23:55:46,612 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:46,612 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:55:46,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-24 23:55:46,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-24 23:55:46,825 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 25 more)] === [2023-11-24 23:55:46,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:46,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1588263532, now seen corresponding path program 1 times [2023-11-24 23:55:46,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:46,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660002207] [2023-11-24 23:55:46,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:46,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:46,833 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:55:46,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [125710433] [2023-11-24 23:55:46,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:46,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:46,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:55:46,835 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:55:46,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-24 23:55:46,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:46,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 23:55:46,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:55:46,967 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 23:55:46,967 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:55:47,057 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-24 23:55:47,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:47,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660002207] [2023-11-24 23:55:47,058 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:55:47,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125710433] [2023-11-24 23:55:47,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125710433] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:55:47,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1335307289] [2023-11-24 23:55:47,060 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-11-24 23:55:47,060 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:55:47,061 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:55:47,061 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:55:47,061 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:55:48,891 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-11-24 23:55:48,893 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:55:50,932 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7690#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~d~0#1| 2147483647) (<= 2147483647 |ULTIMATE.start_main_#t~post6#1|) (= |ULTIMATE.start_main_~q~0#1| 0) (= ~counter~0 |ULTIMATE.start_main_#t~post6#1|) (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|) (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1) (<= (+ |ULTIMATE.start_main_~r~0#1| 1) |ULTIMATE.start_main_~d~0#1|) (<= 0 (+ |ULTIMATE.start_main_~r~0#1| 2147483648)))' at error location [2023-11-24 23:55:50,932 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-24 23:55:50,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 23:55:50,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2023-11-24 23:55:50,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003406603] [2023-11-24 23:55:50,933 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 23:55:50,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 23:55:50,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:50,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 23:55:50,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2023-11-24 23:55:50,935 INFO L87 Difference]: Start difference. First operand 267 states and 370 transitions. Second operand has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 14 states have internal predecessors, (47), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-24 23:55:51,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:51,321 INFO L93 Difference]: Finished difference Result 309 states and 408 transitions. [2023-11-24 23:55:51,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-24 23:55:51,322 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 14 states have internal predecessors, (47), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 40 [2023-11-24 23:55:51,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:51,325 INFO L225 Difference]: With dead ends: 309 [2023-11-24 23:55:51,325 INFO L226 Difference]: Without dead ends: 303 [2023-11-24 23:55:51,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 87 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2023-11-24 23:55:51,328 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 108 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:51,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 492 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:55:51,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2023-11-24 23:55:51,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 285. [2023-11-24 23:55:51,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 225 states have (on average 1.431111111111111) internal successors, (322), 245 states have internal predecessors, (322), 33 states have call successors, (33), 6 states have call predecessors, (33), 6 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-24 23:55:51,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 388 transitions. [2023-11-24 23:55:51,355 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 388 transitions. Word has length 40 [2023-11-24 23:55:51,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:51,357 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 388 transitions. [2023-11-24 23:55:51,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 14 states have internal predecessors, (47), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-24 23:55:51,357 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 388 transitions. [2023-11-24 23:55:51,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-24 23:55:51,358 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:51,358 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:55:51,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-24 23:55:51,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-24 23:55:51,563 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 25 more)] === [2023-11-24 23:55:51,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:51,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1810387606, now seen corresponding path program 1 times [2023-11-24 23:55:51,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:51,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95924657] [2023-11-24 23:55:51,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:51,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:51,572 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:55:51,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [765932872] [2023-11-24 23:55:51,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:51,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:51,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:55:51,574 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:55:51,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-24 23:55:51,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:51,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 23:55:51,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:55:51,729 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-24 23:55:51,729 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:55:51,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:51,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95924657] [2023-11-24 23:55:51,729 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:55:51,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765932872] [2023-11-24 23:55:51,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765932872] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:55:51,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:55:51,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:55:51,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164647489] [2023-11-24 23:55:51,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:55:51,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:55:51,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:51,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:55:51,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:55:51,731 INFO L87 Difference]: Start difference. First operand 285 states and 388 transitions. Second operand has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 23:55:51,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:51,808 INFO L93 Difference]: Finished difference Result 309 states and 413 transitions. [2023-11-24 23:55:51,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:55:51,809 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2023-11-24 23:55:51,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:51,811 INFO L225 Difference]: With dead ends: 309 [2023-11-24 23:55:51,811 INFO L226 Difference]: Without dead ends: 303 [2023-11-24 23:55:51,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 43 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 23:55:51,812 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 31 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:51,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 78 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:55:51,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2023-11-24 23:55:51,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 282. [2023-11-24 23:55:51,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 222 states have (on average 1.3738738738738738) internal successors, (305), 242 states have internal predecessors, (305), 33 states have call successors, (33), 6 states have call predecessors, (33), 6 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-24 23:55:51,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 371 transitions. [2023-11-24 23:55:51,834 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 371 transitions. Word has length 45 [2023-11-24 23:55:51,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:51,835 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 371 transitions. [2023-11-24 23:55:51,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 23:55:51,835 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 371 transitions. [2023-11-24 23:55:51,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-24 23:55:51,836 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:51,836 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1] [2023-11-24 23:55:51,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-24 23:55:52,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-24 23:55:52,042 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 25 more)] === [2023-11-24 23:55:52,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:52,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1906250898, now seen corresponding path program 2 times [2023-11-24 23:55:52,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:52,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700668496] [2023-11-24 23:55:52,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:52,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:52,048 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:55:52,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1541573306] [2023-11-24 23:55:52,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 23:55:52,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:52,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:55:52,050 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:55:52,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-24 23:55:52,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-24 23:55:52,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 23:55:52,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 23:55:52,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:55:52,174 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-24 23:55:52,175 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:55:52,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:52,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700668496] [2023-11-24 23:55:52,175 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:55:52,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541573306] [2023-11-24 23:55:52,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541573306] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:55:52,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:55:52,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:55:52,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157578704] [2023-11-24 23:55:52,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:55:52,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:55:52,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:52,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:55:52,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:55:52,178 INFO L87 Difference]: Start difference. First operand 282 states and 371 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 23:55:52,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:52,228 INFO L93 Difference]: Finished difference Result 282 states and 371 transitions. [2023-11-24 23:55:52,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:55:52,229 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 53 [2023-11-24 23:55:52,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:52,231 INFO L225 Difference]: With dead ends: 282 [2023-11-24 23:55:52,231 INFO L226 Difference]: Without dead ends: 279 [2023-11-24 23:55:52,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:55:52,232 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 96 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:52,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 49 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:55:52,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2023-11-24 23:55:52,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 239. [2023-11-24 23:55:52,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 186 states have (on average 1.2903225806451613) internal successors, (240), 203 states have internal predecessors, (240), 29 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2023-11-24 23:55:52,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 298 transitions. [2023-11-24 23:55:52,252 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 298 transitions. Word has length 53 [2023-11-24 23:55:52,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:52,253 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 298 transitions. [2023-11-24 23:55:52,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 23:55:52,253 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 298 transitions. [2023-11-24 23:55:52,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-24 23:55:52,254 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:52,254 INFO L195 NwaCegarLoop]: trace histogram [8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:55:52,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-24 23:55:52,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:52,460 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 25 more)] === [2023-11-24 23:55:52,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:52,460 INFO L85 PathProgramCache]: Analyzing trace with hash 7636799, now seen corresponding path program 1 times [2023-11-24 23:55:52,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:52,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870587359] [2023-11-24 23:55:52,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:52,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:52,469 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:55:52,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1520432899] [2023-11-24 23:55:52,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:52,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:52,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:55:52,471 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:55:52,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-24 23:55:52,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:52,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:55:52,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:55:52,543 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-24 23:55:52,543 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:55:52,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:52,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870587359] [2023-11-24 23:55:52,543 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:55:52,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520432899] [2023-11-24 23:55:52,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520432899] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:55:52,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:55:52,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:55:52,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878475797] [2023-11-24 23:55:52,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:55:52,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:55:52,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:52,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:55:52,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:55:52,545 INFO L87 Difference]: Start difference. First operand 239 states and 298 transitions. Second operand has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-24 23:55:52,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:52,594 INFO L93 Difference]: Finished difference Result 239 states and 298 transitions. [2023-11-24 23:55:52,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:55:52,594 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 60 [2023-11-24 23:55:52,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:52,596 INFO L225 Difference]: With dead ends: 239 [2023-11-24 23:55:52,596 INFO L226 Difference]: Without dead ends: 238 [2023-11-24 23:55:52,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 58 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 23:55:52,598 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 4 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:52,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 101 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:55:52,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2023-11-24 23:55:52,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2023-11-24 23:55:52,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 186 states have (on average 1.2741935483870968) internal successors, (237), 202 states have internal predecessors, (237), 29 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2023-11-24 23:55:52,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 295 transitions. [2023-11-24 23:55:52,617 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 295 transitions. Word has length 60 [2023-11-24 23:55:52,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:52,618 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 295 transitions. [2023-11-24 23:55:52,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-24 23:55:52,618 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 295 transitions. [2023-11-24 23:55:52,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-24 23:55:52,619 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:52,619 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1] [2023-11-24 23:55:52,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-24 23:55:52,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:52,825 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 25 more)] === [2023-11-24 23:55:52,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:52,825 INFO L85 PathProgramCache]: Analyzing trace with hash 80898531, now seen corresponding path program 1 times [2023-11-24 23:55:52,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:52,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852137499] [2023-11-24 23:55:52,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:52,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:52,834 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:55:52,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1493179794] [2023-11-24 23:55:52,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:52,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:52,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:55:52,841 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:55:52,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-24 23:55:52,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:52,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 23:55:52,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:55:52,967 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-24 23:55:52,967 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:55:53,069 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-24 23:55:53,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:53,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852137499] [2023-11-24 23:55:53,069 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:55:53,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493179794] [2023-11-24 23:55:53,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493179794] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:55:53,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [209767150] [2023-11-24 23:55:53,072 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-11-24 23:55:53,072 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:55:53,072 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:55:53,072 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:55:53,073 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:55:54,663 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-11-24 23:55:54,664 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:55:56,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [209767150] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:55:56,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-24 23:55:56,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [4, 4] total 20 [2023-11-24 23:55:56,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414949034] [2023-11-24 23:55:56,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:55:56,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 23:55:56,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:56,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 23:55:56,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2023-11-24 23:55:56,408 INFO L87 Difference]: Start difference. First operand 238 states and 295 transitions. Second operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-24 23:55:57,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:57,680 INFO L93 Difference]: Finished difference Result 241 states and 296 transitions. [2023-11-24 23:55:57,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-24 23:55:57,681 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 61 [2023-11-24 23:55:57,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:57,683 INFO L225 Difference]: With dead ends: 241 [2023-11-24 23:55:57,683 INFO L226 Difference]: Without dead ends: 240 [2023-11-24 23:55:57,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 159 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2023-11-24 23:55:57,685 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 35 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:57,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 212 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 23:55:57,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-11-24 23:55:57,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2023-11-24 23:55:57,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 187 states have (on average 1.2620320855614973) internal successors, (236), 202 states have internal predecessors, (236), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2023-11-24 23:55:57,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 294 transitions. [2023-11-24 23:55:57,711 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 294 transitions. Word has length 61 [2023-11-24 23:55:57,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:57,711 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 294 transitions. [2023-11-24 23:55:57,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-24 23:55:57,712 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 294 transitions. [2023-11-24 23:55:57,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-24 23:55:57,713 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:57,713 INFO L195 NwaCegarLoop]: trace histogram [8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:55:57,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-24 23:55:57,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-24 23:55:57,918 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 25 more)] === [2023-11-24 23:55:57,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:57,919 INFO L85 PathProgramCache]: Analyzing trace with hash 236740885, now seen corresponding path program 1 times [2023-11-24 23:55:57,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:57,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826068976] [2023-11-24 23:55:57,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:57,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:57,935 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:55:57,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800142543] [2023-11-24 23:55:57,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:57,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:57,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:55:57,937 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:55:57,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-24 23:55:58,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:58,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 23:55:58,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:55:58,205 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-24 23:55:58,205 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:55:58,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:58,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826068976] [2023-11-24 23:55:58,206 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:55:58,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800142543] [2023-11-24 23:55:58,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800142543] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:55:58,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:55:58,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:55:58,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692689997] [2023-11-24 23:55:58,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:55:58,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:55:58,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:58,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:55:58,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:55:58,208 INFO L87 Difference]: Start difference. First operand 239 states and 294 transitions. Second operand has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 23:55:58,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:58,323 INFO L93 Difference]: Finished difference Result 334 states and 416 transitions. [2023-11-24 23:55:58,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:55:58,324 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2023-11-24 23:55:58,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:58,327 INFO L225 Difference]: With dead ends: 334 [2023-11-24 23:55:58,327 INFO L226 Difference]: Without dead ends: 332 [2023-11-24 23:55:58,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:55:58,329 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 43 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:58,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 111 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:55:58,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2023-11-24 23:55:58,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 311. [2023-11-24 23:55:58,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 251 states have (on average 1.2828685258964143) internal successors, (322), 266 states have internal predecessors, (322), 37 states have call successors, (37), 7 states have call predecessors, (37), 7 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2023-11-24 23:55:58,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 396 transitions. [2023-11-24 23:55:58,366 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 396 transitions. Word has length 61 [2023-11-24 23:55:58,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:58,366 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 396 transitions. [2023-11-24 23:55:58,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 23:55:58,366 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 396 transitions. [2023-11-24 23:55:58,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-24 23:55:58,369 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:58,369 INFO L195 NwaCegarLoop]: trace histogram [8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:55:58,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-24 23:55:58,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-24 23:55:58,575 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 25 more)] === [2023-11-24 23:55:58,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:58,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1250967039, now seen corresponding path program 1 times [2023-11-24 23:55:58,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:58,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056958518] [2023-11-24 23:55:58,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:58,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:58,598 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:55:58,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1223694051] [2023-11-24 23:55:58,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:58,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:58,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:55:58,601 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:55:58,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-24 23:55:58,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:58,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 23:55:58,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:55:58,864 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-24 23:55:58,864 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:55:58,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:58,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056958518] [2023-11-24 23:55:58,865 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:55:58,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223694051] [2023-11-24 23:55:58,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223694051] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:55:58,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:55:58,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:55:58,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749584779] [2023-11-24 23:55:58,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:55:58,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:55:58,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:58,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:55:58,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:55:58,868 INFO L87 Difference]: Start difference. First operand 311 states and 396 transitions. Second operand has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-24 23:55:59,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:59,027 INFO L93 Difference]: Finished difference Result 327 states and 410 transitions. [2023-11-24 23:55:59,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:55:59,028 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 62 [2023-11-24 23:55:59,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:59,030 INFO L225 Difference]: With dead ends: 327 [2023-11-24 23:55:59,030 INFO L226 Difference]: Without dead ends: 326 [2023-11-24 23:55:59,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:55:59,032 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 76 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:59,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 135 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:55:59,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2023-11-24 23:55:59,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 317. [2023-11-24 23:55:59,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 257 states have (on average 1.272373540856031) internal successors, (327), 272 states have internal predecessors, (327), 37 states have call successors, (37), 7 states have call predecessors, (37), 7 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2023-11-24 23:55:59,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 401 transitions. [2023-11-24 23:55:59,068 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 401 transitions. Word has length 62 [2023-11-24 23:55:59,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:59,068 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 401 transitions. [2023-11-24 23:55:59,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-24 23:55:59,069 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 401 transitions. [2023-11-24 23:55:59,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-24 23:55:59,074 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:59,074 INFO L195 NwaCegarLoop]: trace histogram [8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:55:59,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-24 23:55:59,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:59,280 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 25 more)] === [2023-11-24 23:55:59,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:59,281 INFO L85 PathProgramCache]: Analyzing trace with hash -125272425, now seen corresponding path program 1 times [2023-11-24 23:55:59,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:59,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749194633] [2023-11-24 23:55:59,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:59,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:59,290 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:55:59,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1943778983] [2023-11-24 23:55:59,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:59,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:59,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:55:59,292 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:55:59,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-24 23:55:59,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:59,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 23:55:59,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:55:59,462 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-24 23:55:59,462 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:55:59,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:59,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749194633] [2023-11-24 23:55:59,462 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:55:59,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943778983] [2023-11-24 23:55:59,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943778983] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:55:59,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:55:59,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:55:59,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289876132] [2023-11-24 23:55:59,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:55:59,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:55:59,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:59,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:55:59,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:55:59,465 INFO L87 Difference]: Start difference. First operand 317 states and 401 transitions. Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-24 23:55:59,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:59,532 INFO L93 Difference]: Finished difference Result 324 states and 405 transitions. [2023-11-24 23:55:59,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:55:59,533 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 63 [2023-11-24 23:55:59,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:59,535 INFO L225 Difference]: With dead ends: 324 [2023-11-24 23:55:59,536 INFO L226 Difference]: Without dead ends: 323 [2023-11-24 23:55:59,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:55:59,537 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 41 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:59,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 80 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:55:59,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2023-11-24 23:55:59,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 319. [2023-11-24 23:55:59,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 259 states have (on average 1.2586872586872586) internal successors, (326), 274 states have internal predecessors, (326), 37 states have call successors, (37), 7 states have call predecessors, (37), 7 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2023-11-24 23:55:59,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 400 transitions. [2023-11-24 23:55:59,572 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 400 transitions. Word has length 63 [2023-11-24 23:55:59,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:59,572 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 400 transitions. [2023-11-24 23:55:59,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-24 23:55:59,573 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 400 transitions. [2023-11-24 23:55:59,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-24 23:55:59,574 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:59,574 INFO L195 NwaCegarLoop]: trace histogram [8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:55:59,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-24 23:55:59,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:59,779 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 25 more)] === [2023-11-24 23:55:59,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:59,780 INFO L85 PathProgramCache]: Analyzing trace with hash 619314852, now seen corresponding path program 1 times [2023-11-24 23:55:59,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:59,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937026857] [2023-11-24 23:55:59,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:59,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:59,788 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:55:59,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2087498454] [2023-11-24 23:55:59,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:59,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:59,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:55:59,790 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:55:59,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5274906-0031-4dfc-bfcf-03b3bc70be6d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-24 23:55:59,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:59,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 23:55:59,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:55:59,973 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-24 23:55:59,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:56:00,147 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-24 23:56:00,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:00,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937026857] [2023-11-24 23:56:00,147 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:56:00,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087498454] [2023-11-24 23:56:00,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087498454] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:56:00,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1172516068] [2023-11-24 23:56:00,150 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2023-11-24 23:56:00,150 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:56:00,151 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:56:00,151 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:56:00,151 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:56:08,706 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-11-24 23:56:08,707 INFO L180 IcfgInterpreter]: Interpretation finished