./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 527bcce2 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_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5 --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 776d32abf1ae3b62e7ad4a02cd7c02c0cc6433852a1fe73b7d30c6e216da832a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 18:58:59,263 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 18:58:59,374 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-11-21 18:58:59,386 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 18:58:59,388 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 18:58:59,450 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 18:58:59,450 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 18:58:59,451 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 18:58:59,452 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 18:58:59,457 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 18:58:59,457 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 18:58:59,458 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 18:58:59,458 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 18:58:59,460 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 18:58:59,461 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 18:58:59,461 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 18:58:59,461 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 18:58:59,462 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 18:58:59,462 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 18:58:59,463 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 18:58:59,463 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 18:58:59,464 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 18:58:59,465 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 18:58:59,465 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 18:58:59,466 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 18:58:59,466 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 18:58:59,467 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 18:58:59,467 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 18:58:59,473 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 18:58:59,474 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 18:58:59,475 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 18:58:59,475 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-21 18:58:59,475 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 18:58:59,476 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 18:58:59,476 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 18:58:59,476 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 18:58:59,476 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 18:58:59,477 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 18:58:59,477 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 18:58:59,477 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 18:58:59,477 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 18:58:59,478 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 18:58:59,478 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 18:58:59,478 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 18:58:59,479 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 18:58:59,479 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 18:58:59,479 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 18:58:59,479 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 18:58:59,480 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 18:58:59,480 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_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 776d32abf1ae3b62e7ad4a02cd7c02c0cc6433852a1fe73b7d30c6e216da832a [2023-11-21 18:58:59,831 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 18:58:59,867 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 18:58:59,870 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 18:58:59,871 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 18:58:59,872 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 18:58:59,873 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c [2023-11-21 18:59:02,941 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 18:59:03,228 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 18:59:03,228 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c [2023-11-21 18:59:03,238 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/data/4944aabcb/74e2c448bdb94b62b86b1056cfa73ab8/FLAG5b69ce736 [2023-11-21 18:59:03,257 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/data/4944aabcb/74e2c448bdb94b62b86b1056cfa73ab8 [2023-11-21 18:59:03,264 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 18:59:03,266 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 18:59:03,269 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 18:59:03,270 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 18:59:03,276 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 18:59:03,280 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 06:59:03" (1/1) ... [2023-11-21 18:59:03,281 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@133aef63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:03, skipping insertion in model container [2023-11-21 18:59:03,281 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 06:59:03" (1/1) ... [2023-11-21 18:59:03,311 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 18:59:03,509 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 18:59:03,521 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 18:59:03,545 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 18:59:03,561 INFO L206 MainTranslator]: Completed translation [2023-11-21 18:59:03,561 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:03 WrapperNode [2023-11-21 18:59:03,562 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 18:59:03,563 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 18:59:03,563 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 18:59:03,563 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 18:59:03,572 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:03" (1/1) ... [2023-11-21 18:59:03,582 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:03" (1/1) ... [2023-11-21 18:59:03,616 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 139 [2023-11-21 18:59:03,618 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 18:59:03,619 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 18:59:03,619 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 18:59:03,619 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 18:59:03,626 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:03" (1/1) ... [2023-11-21 18:59:03,627 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:03" (1/1) ... [2023-11-21 18:59:03,629 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:03" (1/1) ... [2023-11-21 18:59:03,629 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:03" (1/1) ... [2023-11-21 18:59:03,634 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:03" (1/1) ... [2023-11-21 18:59:03,638 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:03" (1/1) ... [2023-11-21 18:59:03,640 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:03" (1/1) ... [2023-11-21 18:59:03,641 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:03" (1/1) ... [2023-11-21 18:59:03,644 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 18:59:03,645 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 18:59:03,645 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 18:59:03,645 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 18:59:03,646 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:03" (1/1) ... [2023-11-21 18:59:03,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 18:59:03,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:03,700 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 18:59:03,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 18:59:03,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 18:59:03,733 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-21 18:59:03,733 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-21 18:59:03,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 18:59:03,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 18:59:03,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 18:59:03,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-21 18:59:03,734 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-21 18:59:03,801 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 18:59:03,804 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 18:59:04,281 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 18:59:04,327 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 18:59:04,327 INFO L308 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-21 18:59:04,329 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 06:59:04 BoogieIcfgContainer [2023-11-21 18:59:04,330 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 18:59:04,337 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 18:59:04,337 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 18:59:04,340 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 18:59:04,341 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 06:59:03" (1/3) ... [2023-11-21 18:59:04,342 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75019e49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 06:59:04, skipping insertion in model container [2023-11-21 18:59:04,342 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:03" (2/3) ... [2023-11-21 18:59:04,342 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75019e49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 06:59:04, skipping insertion in model container [2023-11-21 18:59:04,342 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 06:59:04" (3/3) ... [2023-11-21 18:59:04,344 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound10.c [2023-11-21 18:59:04,362 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 18:59:04,362 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 50 error locations. [2023-11-21 18:59:04,410 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 18:59:04,417 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;@3a6c2dbf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 18:59:04,417 INFO L358 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2023-11-21 18:59:04,422 INFO L276 IsEmpty]: Start isEmpty. Operand has 125 states, 63 states have (on average 1.8888888888888888) internal successors, (119), 113 states have internal predecessors, (119), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-21 18:59:04,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-21 18:59:04,430 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:04,430 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:04,431 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 47 more)] === [2023-11-21 18:59:04,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:04,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1353732251, now seen corresponding path program 1 times [2023-11-21 18:59:04,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:04,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876198871] [2023-11-21 18:59:04,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:04,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:04,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:04,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:04,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876198871] [2023-11-21 18:59:04,598 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-21 18:59:04,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004733618] [2023-11-21 18:59:04,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:04,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:04,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:04,601 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:04,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 18:59:04,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:04,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-21 18:59:04,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:04,756 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 18:59:04,757 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:04,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004733618] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:04,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:04,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 18:59:04,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71128230] [2023-11-21 18:59:04,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:04,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-21 18:59:04,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:04,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-21 18:59:04,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-21 18:59:04,817 INFO L87 Difference]: Start difference. First operand has 125 states, 63 states have (on average 1.8888888888888888) internal successors, (119), 113 states have internal predecessors, (119), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 18:59:04,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:04,885 INFO L93 Difference]: Finished difference Result 241 states and 262 transitions. [2023-11-21 18:59:04,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-21 18:59:04,888 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 17 [2023-11-21 18:59:04,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:04,900 INFO L225 Difference]: With dead ends: 241 [2023-11-21 18:59:04,901 INFO L226 Difference]: Without dead ends: 122 [2023-11-21 18:59:04,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-21 18:59:04,909 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:04,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 130 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 18:59:04,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-11-21 18:59:04,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2023-11-21 18:59:04,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 62 states have (on average 1.8387096774193548) internal successors, (114), 111 states have internal predecessors, (114), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-21 18:59:04,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 130 transitions. [2023-11-21 18:59:04,957 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 130 transitions. Word has length 17 [2023-11-21 18:59:04,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:04,959 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 130 transitions. [2023-11-21 18:59:04,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 18:59:04,959 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 130 transitions. [2023-11-21 18:59:04,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-21 18:59:04,960 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:04,961 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:04,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-21 18:59:05,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:05,162 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 47 more)] === [2023-11-21 18:59:05,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:05,163 INFO L85 PathProgramCache]: Analyzing trace with hash -984172713, now seen corresponding path program 1 times [2023-11-21 18:59:05,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:05,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525654648] [2023-11-21 18:59:05,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:05,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:05,186 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 18:59:05,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1479487250] [2023-11-21 18:59:05,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:05,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:05,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:05,189 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:05,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 18:59:05,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:05,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 18:59:05,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:05,388 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 18:59:05,389 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:05,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:05,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525654648] [2023-11-21 18:59:05,392 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 18:59:05,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479487250] [2023-11-21 18:59:05,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479487250] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:05,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:05,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 18:59:05,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747504922] [2023-11-21 18:59:05,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:05,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 18:59:05,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:05,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 18:59:05,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 18:59:05,398 INFO L87 Difference]: Start difference. First operand 122 states and 130 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 18:59:05,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:05,974 INFO L93 Difference]: Finished difference Result 217 states and 231 transitions. [2023-11-21 18:59:05,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 18:59:05,975 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 18 [2023-11-21 18:59:05,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:05,980 INFO L225 Difference]: With dead ends: 217 [2023-11-21 18:59:05,983 INFO L226 Difference]: Without dead ends: 215 [2023-11-21 18:59:05,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 18:59:05,986 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 286 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:05,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 172 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 18:59:05,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2023-11-21 18:59:06,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 161. [2023-11-21 18:59:06,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 97 states have (on average 1.8453608247422681) internal successors, (179), 146 states have internal predecessors, (179), 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) [2023-11-21 18:59:06,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 203 transitions. [2023-11-21 18:59:06,061 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 203 transitions. Word has length 18 [2023-11-21 18:59:06,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:06,063 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 203 transitions. [2023-11-21 18:59:06,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 18:59:06,064 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 203 transitions. [2023-11-21 18:59:06,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-21 18:59:06,065 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:06,066 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:06,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:06,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:06,282 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 47 more)] === [2023-11-21 18:59:06,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:06,283 INFO L85 PathProgramCache]: Analyzing trace with hash -444582861, now seen corresponding path program 1 times [2023-11-21 18:59:06,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:06,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943183447] [2023-11-21 18:59:06,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:06,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:06,306 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 18:59:06,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1680175623] [2023-11-21 18:59:06,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:06,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:06,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:06,309 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:06,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 18:59:06,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:06,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 18:59:06,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:06,418 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 18:59:06,418 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:06,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:06,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943183447] [2023-11-21 18:59:06,419 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 18:59:06,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680175623] [2023-11-21 18:59:06,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680175623] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:06,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:06,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 18:59:06,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961867657] [2023-11-21 18:59:06,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:06,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 18:59:06,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:06,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 18:59:06,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 18:59:06,423 INFO L87 Difference]: Start difference. First operand 161 states and 203 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 18:59:06,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:06,734 INFO L93 Difference]: Finished difference Result 215 states and 229 transitions. [2023-11-21 18:59:06,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 18:59:06,735 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 19 [2023-11-21 18:59:06,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:06,737 INFO L225 Difference]: With dead ends: 215 [2023-11-21 18:59:06,738 INFO L226 Difference]: Without dead ends: 213 [2023-11-21 18:59:06,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 18:59:06,740 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 280 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:06,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 172 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 18:59:06,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-11-21 18:59:06,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 162. [2023-11-21 18:59:06,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 98 states have (on average 1.8265306122448979) internal successors, (179), 147 states have internal predecessors, (179), 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) [2023-11-21 18:59:06,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 203 transitions. [2023-11-21 18:59:06,778 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 203 transitions. Word has length 19 [2023-11-21 18:59:06,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:06,779 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 203 transitions. [2023-11-21 18:59:06,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 18:59:06,780 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 203 transitions. [2023-11-21 18:59:06,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-21 18:59:06,781 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:06,781 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:06,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:07,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:07,001 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr38ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 47 more)] === [2023-11-21 18:59:07,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:07,002 INFO L85 PathProgramCache]: Analyzing trace with hash -897166631, now seen corresponding path program 1 times [2023-11-21 18:59:07,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:07,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830120030] [2023-11-21 18:59:07,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:07,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:07,023 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 18:59:07,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1840451615] [2023-11-21 18:59:07,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:07,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:07,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:07,039 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:07,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 18:59:07,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:07,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 18:59:07,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:07,133 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 18:59:07,138 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:07,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:07,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830120030] [2023-11-21 18:59:07,139 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 18:59:07,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840451615] [2023-11-21 18:59:07,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840451615] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:07,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:07,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 18:59:07,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950157847] [2023-11-21 18:59:07,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:07,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:59:07,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:07,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:59:07,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:59:07,143 INFO L87 Difference]: Start difference. First operand 162 states and 203 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 18:59:07,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:07,235 INFO L93 Difference]: Finished difference Result 221 states and 235 transitions. [2023-11-21 18:59:07,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:59:07,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 20 [2023-11-21 18:59:07,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:07,237 INFO L225 Difference]: With dead ends: 221 [2023-11-21 18:59:07,238 INFO L226 Difference]: Without dead ends: 215 [2023-11-21 18:59:07,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:59:07,243 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 86 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:07,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 195 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:59:07,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2023-11-21 18:59:07,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 167. [2023-11-21 18:59:07,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 103 states have (on average 1.766990291262136) internal successors, (182), 152 states have internal predecessors, (182), 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) [2023-11-21 18:59:07,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 206 transitions. [2023-11-21 18:59:07,281 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 206 transitions. Word has length 20 [2023-11-21 18:59:07,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:07,282 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 206 transitions. [2023-11-21 18:59:07,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 18:59:07,283 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 206 transitions. [2023-11-21 18:59:07,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-21 18:59:07,284 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:07,284 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:07,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:07,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:07,504 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 47 more)] === [2023-11-21 18:59:07,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:07,504 INFO L85 PathProgramCache]: Analyzing trace with hash -2043805254, now seen corresponding path program 1 times [2023-11-21 18:59:07,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:07,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336303811] [2023-11-21 18:59:07,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:07,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:07,520 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 18:59:07,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [82653799] [2023-11-21 18:59:07,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:07,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:07,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:07,522 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:07,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 18:59:07,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:07,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 18:59:07,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:07,606 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 18:59:07,607 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:07,608 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:07,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336303811] [2023-11-21 18:59:07,609 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 18:59:07,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82653799] [2023-11-21 18:59:07,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82653799] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:07,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:07,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 18:59:07,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139095129] [2023-11-21 18:59:07,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:07,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:59:07,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:07,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:59:07,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:59:07,616 INFO L87 Difference]: Start difference. First operand 167 states and 206 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, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 18:59:07,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:07,681 INFO L93 Difference]: Finished difference Result 215 states and 229 transitions. [2023-11-21 18:59:07,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:59:07,682 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, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 21 [2023-11-21 18:59:07,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:07,684 INFO L225 Difference]: With dead ends: 215 [2023-11-21 18:59:07,684 INFO L226 Difference]: Without dead ends: 211 [2023-11-21 18:59:07,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:59:07,685 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 81 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:07,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 217 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 18:59:07,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-11-21 18:59:07,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 171. [2023-11-21 18:59:07,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 107 states have (on average 1.7383177570093458) internal successors, (186), 156 states have internal predecessors, (186), 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) [2023-11-21 18:59:07,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 210 transitions. [2023-11-21 18:59:07,722 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 210 transitions. Word has length 21 [2023-11-21 18:59:07,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:07,722 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 210 transitions. [2023-11-21 18:59:07,722 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, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 18:59:07,723 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 210 transitions. [2023-11-21 18:59:07,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-21 18:59:07,724 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:07,724 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:07,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:07,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:07,938 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 47 more)] === [2023-11-21 18:59:07,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:07,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1111299675, now seen corresponding path program 1 times [2023-11-21 18:59:07,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:07,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917873429] [2023-11-21 18:59:07,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:07,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:07,953 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 18:59:07,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [464072672] [2023-11-21 18:59:07,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:07,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:07,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:07,955 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:07,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 18:59:08,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:08,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 18:59:08,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:08,056 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 18:59:08,056 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:08,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:08,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917873429] [2023-11-21 18:59:08,057 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 18:59:08,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464072672] [2023-11-21 18:59:08,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464072672] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:08,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:08,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 18:59:08,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934146445] [2023-11-21 18:59:08,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:08,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 18:59:08,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:08,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 18:59:08,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 18:59:08,062 INFO L87 Difference]: Start difference. First operand 171 states and 210 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 18:59:08,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:08,181 INFO L93 Difference]: Finished difference Result 218 states and 233 transitions. [2023-11-21 18:59:08,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 18:59:08,182 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 22 [2023-11-21 18:59:08,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:08,184 INFO L225 Difference]: With dead ends: 218 [2023-11-21 18:59:08,184 INFO L226 Difference]: Without dead ends: 217 [2023-11-21 18:59:08,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 18:59:08,186 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 155 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:08,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 205 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:59:08,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2023-11-21 18:59:08,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 171. [2023-11-21 18:59:08,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 107 states have (on average 1.7289719626168225) internal successors, (185), 156 states have internal predecessors, (185), 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) [2023-11-21 18:59:08,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 209 transitions. [2023-11-21 18:59:08,201 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 209 transitions. Word has length 22 [2023-11-21 18:59:08,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:08,201 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 209 transitions. [2023-11-21 18:59:08,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 18:59:08,201 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 209 transitions. [2023-11-21 18:59:08,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-21 18:59:08,202 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:08,203 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:08,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:08,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-21 18:59:08,423 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr41ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 47 more)] === [2023-11-21 18:59:08,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:08,423 INFO L85 PathProgramCache]: Analyzing trace with hash 90551735, now seen corresponding path program 1 times [2023-11-21 18:59:08,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:08,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666698124] [2023-11-21 18:59:08,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:08,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:08,436 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 18:59:08,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1379481726] [2023-11-21 18:59:08,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:08,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:08,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:08,438 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:08,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 18:59:08,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:08,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 18:59:08,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:08,534 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 18:59:08,535 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:08,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:08,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666698124] [2023-11-21 18:59:08,535 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 18:59:08,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379481726] [2023-11-21 18:59:08,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379481726] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:08,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:08,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 18:59:08,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145876018] [2023-11-21 18:59:08,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:08,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 18:59:08,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:08,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 18:59:08,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 18:59:08,538 INFO L87 Difference]: Start difference. First operand 171 states and 209 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 18:59:08,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:08,674 INFO L93 Difference]: Finished difference Result 218 states and 233 transitions. [2023-11-21 18:59:08,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 18:59:08,675 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 23 [2023-11-21 18:59:08,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:08,677 INFO L225 Difference]: With dead ends: 218 [2023-11-21 18:59:08,677 INFO L226 Difference]: Without dead ends: 217 [2023-11-21 18:59:08,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 18:59:08,679 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 82 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:08,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 281 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:59:08,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2023-11-21 18:59:08,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 171. [2023-11-21 18:59:08,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 107 states have (on average 1.719626168224299) internal successors, (184), 156 states have internal predecessors, (184), 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) [2023-11-21 18:59:08,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 208 transitions. [2023-11-21 18:59:08,692 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 208 transitions. Word has length 23 [2023-11-21 18:59:08,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:08,693 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 208 transitions. [2023-11-21 18:59:08,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 18:59:08,693 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 208 transitions. [2023-11-21 18:59:08,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-21 18:59:08,694 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:08,694 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:08,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-21 18:59:08,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-21 18:59:08,914 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr30ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 47 more)] === [2023-11-21 18:59:08,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:08,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1296422886, now seen corresponding path program 1 times [2023-11-21 18:59:08,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:08,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073753040] [2023-11-21 18:59:08,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:08,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:08,927 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 18:59:08,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1940087035] [2023-11-21 18:59:08,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:08,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:08,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:08,929 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:08,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-21 18:59:08,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:08,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 18:59:08,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:09,041 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 18:59:09,041 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:09,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:09,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073753040] [2023-11-21 18:59:09,042 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 18:59:09,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940087035] [2023-11-21 18:59:09,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940087035] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:09,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:09,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 18:59:09,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189919223] [2023-11-21 18:59:09,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:09,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 18:59:09,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:09,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 18:59:09,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:59:09,044 INFO L87 Difference]: Start difference. First operand 171 states and 208 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 18:59:09,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:09,283 INFO L93 Difference]: Finished difference Result 209 states and 223 transitions. [2023-11-21 18:59:09,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 18:59:09,283 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 23 [2023-11-21 18:59:09,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:09,285 INFO L225 Difference]: With dead ends: 209 [2023-11-21 18:59:09,286 INFO L226 Difference]: Without dead ends: 208 [2023-11-21 18:59:09,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:59:09,289 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 76 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:09,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 371 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 18:59:09,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2023-11-21 18:59:09,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 172. [2023-11-21 18:59:09,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 108 states have (on average 1.712962962962963) internal successors, (185), 157 states have internal predecessors, (185), 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) [2023-11-21 18:59:09,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 209 transitions. [2023-11-21 18:59:09,308 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 209 transitions. Word has length 23 [2023-11-21 18:59:09,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:09,308 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 209 transitions. [2023-11-21 18:59:09,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 18:59:09,308 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 209 transitions. [2023-11-21 18:59:09,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-21 18:59:09,311 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:09,312 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:09,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:09,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-21 18:59:09,531 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 47 more)] === [2023-11-21 18:59:09,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:09,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1534403647, now seen corresponding path program 1 times [2023-11-21 18:59:09,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:09,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73270246] [2023-11-21 18:59:09,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:09,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:09,545 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 18:59:09,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [212986863] [2023-11-21 18:59:09,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:09,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:09,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:09,548 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:09,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-21 18:59:09,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:09,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 18:59:09,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:09,669 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 18:59:09,669 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:09,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:09,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73270246] [2023-11-21 18:59:09,670 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 18:59:09,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212986863] [2023-11-21 18:59:09,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212986863] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:09,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:09,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 18:59:09,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085418078] [2023-11-21 18:59:09,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:09,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 18:59:09,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:09,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 18:59:09,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 18:59:09,672 INFO L87 Difference]: Start difference. First operand 172 states and 209 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 18:59:09,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:09,841 INFO L93 Difference]: Finished difference Result 208 states and 222 transitions. [2023-11-21 18:59:09,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 18:59:09,841 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 24 [2023-11-21 18:59:09,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:09,843 INFO L225 Difference]: With dead ends: 208 [2023-11-21 18:59:09,843 INFO L226 Difference]: Without dead ends: 207 [2023-11-21 18:59:09,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:59:09,845 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 77 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:09,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 257 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:59:09,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-11-21 18:59:09,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 173. [2023-11-21 18:59:09,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 109 states have (on average 1.7064220183486238) internal successors, (186), 158 states have internal predecessors, (186), 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) [2023-11-21 18:59:09,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 210 transitions. [2023-11-21 18:59:09,860 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 210 transitions. Word has length 24 [2023-11-21 18:59:09,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:09,860 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 210 transitions. [2023-11-21 18:59:09,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 18:59:09,860 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 210 transitions. [2023-11-21 18:59:09,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-21 18:59:09,861 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:09,862 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:09,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:10,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-21 18:59:10,078 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr32ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 47 more)] === [2023-11-21 18:59:10,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:10,078 INFO L85 PathProgramCache]: Analyzing trace with hash -321872644, now seen corresponding path program 1 times [2023-11-21 18:59:10,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:10,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882053353] [2023-11-21 18:59:10,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:10,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:10,091 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 18:59:10,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [351614879] [2023-11-21 18:59:10,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:10,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:10,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:10,093 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:10,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-21 18:59:10,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:10,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 18:59:10,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:10,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 18:59:10,166 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:10,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:10,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882053353] [2023-11-21 18:59:10,167 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 18:59:10,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351614879] [2023-11-21 18:59:10,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351614879] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:10,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:10,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 18:59:10,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441978104] [2023-11-21 18:59:10,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:10,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:59:10,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:10,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:59:10,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:59:10,170 INFO L87 Difference]: Start difference. First operand 173 states and 210 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, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 18:59:10,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:10,250 INFO L93 Difference]: Finished difference Result 295 states and 366 transitions. [2023-11-21 18:59:10,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:59:10,251 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, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 25 [2023-11-21 18:59:10,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:10,253 INFO L225 Difference]: With dead ends: 295 [2023-11-21 18:59:10,253 INFO L226 Difference]: Without dead ends: 289 [2023-11-21 18:59:10,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:59:10,255 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 64 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:10,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 203 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:59:10,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-11-21 18:59:10,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 249. [2023-11-21 18:59:10,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 177 states have (on average 1.6836158192090396) internal successors, (298), 226 states have internal predecessors, (298), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-21 18:59:10,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 338 transitions. [2023-11-21 18:59:10,277 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 338 transitions. Word has length 25 [2023-11-21 18:59:10,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:10,278 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 338 transitions. [2023-11-21 18:59:10,278 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, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 18:59:10,278 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 338 transitions. [2023-11-21 18:59:10,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-21 18:59:10,279 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:10,280 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:10,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:10,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:10,500 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 47 more)] === [2023-11-21 18:59:10,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:10,501 INFO L85 PathProgramCache]: Analyzing trace with hash -676874114, now seen corresponding path program 1 times [2023-11-21 18:59:10,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:10,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617935129] [2023-11-21 18:59:10,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:10,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:10,512 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 18:59:10,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [260797613] [2023-11-21 18:59:10,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:10,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:10,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:10,514 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:10,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-21 18:59:10,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:10,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 18:59:10,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:10,617 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 18:59:10,618 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:10,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:10,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617935129] [2023-11-21 18:59:10,618 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 18:59:10,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260797613] [2023-11-21 18:59:10,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260797613] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:10,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:10,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 18:59:10,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216838496] [2023-11-21 18:59:10,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:10,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 18:59:10,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:10,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 18:59:10,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 18:59:10,621 INFO L87 Difference]: Start difference. First operand 249 states and 338 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 18:59:10,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:10,744 INFO L93 Difference]: Finished difference Result 287 states and 353 transitions. [2023-11-21 18:59:10,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 18:59:10,745 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 25 [2023-11-21 18:59:10,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:10,748 INFO L225 Difference]: With dead ends: 287 [2023-11-21 18:59:10,748 INFO L226 Difference]: Without dead ends: 286 [2023-11-21 18:59:10,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 18:59:10,749 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 143 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:10,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 220 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:59:10,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2023-11-21 18:59:10,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 249. [2023-11-21 18:59:10,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 177 states have (on average 1.6723163841807909) internal successors, (296), 226 states have internal predecessors, (296), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-21 18:59:10,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 336 transitions. [2023-11-21 18:59:10,777 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 336 transitions. Word has length 25 [2023-11-21 18:59:10,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:10,778 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 336 transitions. [2023-11-21 18:59:10,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 18:59:10,778 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 336 transitions. [2023-11-21 18:59:10,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-21 18:59:10,781 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:10,781 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:10,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:11,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:11,006 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 47 more)] === [2023-11-21 18:59:11,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:11,006 INFO L85 PathProgramCache]: Analyzing trace with hash 387454303, now seen corresponding path program 1 times [2023-11-21 18:59:11,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:11,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202585876] [2023-11-21 18:59:11,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:11,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:11,021 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 18:59:11,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [57465351] [2023-11-21 18:59:11,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:11,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:11,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:11,023 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:11,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-21 18:59:11,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:11,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 18:59:11,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:11,204 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 18:59:11,205 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:11,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:11,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202585876] [2023-11-21 18:59:11,205 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 18:59:11,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57465351] [2023-11-21 18:59:11,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57465351] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:11,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:11,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 18:59:11,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051870935] [2023-11-21 18:59:11,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:11,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 18:59:11,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:11,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 18:59:11,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 18:59:11,208 INFO L87 Difference]: Start difference. First operand 249 states and 336 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 18:59:11,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:11,394 INFO L93 Difference]: Finished difference Result 286 states and 351 transitions. [2023-11-21 18:59:11,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 18:59:11,395 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 26 [2023-11-21 18:59:11,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:11,399 INFO L225 Difference]: With dead ends: 286 [2023-11-21 18:59:11,399 INFO L226 Difference]: Without dead ends: 285 [2023-11-21 18:59:11,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 18:59:11,401 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 74 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:11,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 257 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 18:59:11,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2023-11-21 18:59:11,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 250. [2023-11-21 18:59:11,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 178 states have (on average 1.6685393258426966) internal successors, (297), 227 states have internal predecessors, (297), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-21 18:59:11,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 337 transitions. [2023-11-21 18:59:11,425 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 337 transitions. Word has length 26 [2023-11-21 18:59:11,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:11,425 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 337 transitions. [2023-11-21 18:59:11,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 18:59:11,426 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 337 transitions. [2023-11-21 18:59:11,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-21 18:59:11,429 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:11,429 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:11,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:11,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-21 18:59:11,647 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 47 more)] === [2023-11-21 18:59:11,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:11,647 INFO L85 PathProgramCache]: Analyzing trace with hash 491739033, now seen corresponding path program 1 times [2023-11-21 18:59:11,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:11,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599076438] [2023-11-21 18:59:11,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:11,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:11,658 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 18:59:11,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1912160180] [2023-11-21 18:59:11,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:11,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:11,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:11,665 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:11,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-21 18:59:11,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:11,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 18:59:11,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:11,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 18:59:11,760 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:11,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:11,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599076438] [2023-11-21 18:59:11,761 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 18:59:11,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912160180] [2023-11-21 18:59:11,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912160180] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:11,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:11,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 18:59:11,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538511418] [2023-11-21 18:59:11,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:11,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 18:59:11,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:11,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 18:59:11,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 18:59:11,766 INFO L87 Difference]: Start difference. First operand 250 states and 337 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 18:59:11,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:11,904 INFO L93 Difference]: Finished difference Result 286 states and 351 transitions. [2023-11-21 18:59:11,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 18:59:11,905 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 26 [2023-11-21 18:59:11,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:11,908 INFO L225 Difference]: With dead ends: 286 [2023-11-21 18:59:11,908 INFO L226 Difference]: Without dead ends: 285 [2023-11-21 18:59:11,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 18:59:11,909 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 75 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:11,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 295 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:59:11,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2023-11-21 18:59:11,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 250. [2023-11-21 18:59:11,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 178 states have (on average 1.6573033707865168) internal successors, (295), 227 states have internal predecessors, (295), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-21 18:59:11,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 335 transitions. [2023-11-21 18:59:11,932 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 335 transitions. Word has length 26 [2023-11-21 18:59:11,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:11,932 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 335 transitions. [2023-11-21 18:59:11,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 18:59:11,933 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 335 transitions. [2023-11-21 18:59:11,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-21 18:59:11,934 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:11,934 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:11,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:12,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-21 18:59:12,154 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr45ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 47 more)] === [2023-11-21 18:59:12,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:12,154 INFO L85 PathProgramCache]: Analyzing trace with hash -873818309, now seen corresponding path program 1 times [2023-11-21 18:59:12,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:12,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641497796] [2023-11-21 18:59:12,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:12,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:12,171 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 18:59:12,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1725743175] [2023-11-21 18:59:12,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:12,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:12,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:12,174 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:12,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-21 18:59:12,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:12,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 18:59:12,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:12,336 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 18:59:12,337 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:12,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:12,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641497796] [2023-11-21 18:59:12,337 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 18:59:12,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725743175] [2023-11-21 18:59:12,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725743175] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:12,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:12,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 18:59:12,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375007868] [2023-11-21 18:59:12,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:12,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 18:59:12,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:12,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 18:59:12,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 18:59:12,341 INFO L87 Difference]: Start difference. First operand 250 states and 335 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 18:59:12,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:12,497 INFO L93 Difference]: Finished difference Result 285 states and 349 transitions. [2023-11-21 18:59:12,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 18:59:12,498 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 27 [2023-11-21 18:59:12,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:12,503 INFO L225 Difference]: With dead ends: 285 [2023-11-21 18:59:12,503 INFO L226 Difference]: Without dead ends: 284 [2023-11-21 18:59:12,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 18:59:12,504 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 72 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:12,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 261 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:59:12,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2023-11-21 18:59:12,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 251. [2023-11-21 18:59:12,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 179 states have (on average 1.6536312849162011) internal successors, (296), 228 states have internal predecessors, (296), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-21 18:59:12,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 336 transitions. [2023-11-21 18:59:12,525 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 336 transitions. Word has length 27 [2023-11-21 18:59:12,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:12,526 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 336 transitions. [2023-11-21 18:59:12,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 18:59:12,526 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 336 transitions. [2023-11-21 18:59:12,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-21 18:59:12,528 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:12,528 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:12,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:12,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-21 18:59:12,742 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 47 more)] === [2023-11-21 18:59:12,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:12,742 INFO L85 PathProgramCache]: Analyzing trace with hash -81960482, now seen corresponding path program 1 times [2023-11-21 18:59:12,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:12,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370743541] [2023-11-21 18:59:12,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:12,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:12,760 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 18:59:12,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [543866909] [2023-11-21 18:59:12,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:12,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:12,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:12,762 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:12,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-21 18:59:12,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:12,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 18:59:12,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:12,852 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 18:59:12,852 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:12,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:12,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370743541] [2023-11-21 18:59:12,853 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 18:59:12,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543866909] [2023-11-21 18:59:12,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543866909] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:12,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:12,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 18:59:12,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481088829] [2023-11-21 18:59:12,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:12,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 18:59:12,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:12,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 18:59:12,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:59:12,855 INFO L87 Difference]: Start difference. First operand 251 states and 336 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 18:59:12,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:12,940 INFO L93 Difference]: Finished difference Result 289 states and 353 transitions. [2023-11-21 18:59:12,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 18:59:12,941 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 27 [2023-11-21 18:59:12,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:12,943 INFO L225 Difference]: With dead ends: 289 [2023-11-21 18:59:12,943 INFO L226 Difference]: Without dead ends: 288 [2023-11-21 18:59:12,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:59:12,946 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 76 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:12,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 322 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:59:12,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2023-11-21 18:59:12,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 256. [2023-11-21 18:59:12,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 184 states have (on average 1.6467391304347827) internal successors, (303), 233 states have internal predecessors, (303), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-21 18:59:12,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 343 transitions. [2023-11-21 18:59:12,966 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 343 transitions. Word has length 27 [2023-11-21 18:59:12,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:12,966 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 343 transitions. [2023-11-21 18:59:12,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 18:59:12,967 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 343 transitions. [2023-11-21 18:59:12,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-21 18:59:12,967 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:12,968 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:12,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-21 18:59:13,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-21 18:59:13,178 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 47 more)] === [2023-11-21 18:59:13,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:13,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1318563615, now seen corresponding path program 1 times [2023-11-21 18:59:13,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:13,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661543480] [2023-11-21 18:59:13,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:13,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:13,188 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 18:59:13,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1306674273] [2023-11-21 18:59:13,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:13,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:13,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:13,190 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:13,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-21 18:59:13,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:13,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 18:59:13,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:13,299 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 18:59:13,300 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:13,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:13,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661543480] [2023-11-21 18:59:13,300 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 18:59:13,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306674273] [2023-11-21 18:59:13,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306674273] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:13,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:13,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 18:59:13,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291914234] [2023-11-21 18:59:13,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:13,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 18:59:13,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:13,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 18:59:13,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 18:59:13,303 INFO L87 Difference]: Start difference. First operand 256 states and 343 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 18:59:13,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:13,498 INFO L93 Difference]: Finished difference Result 284 states and 350 transitions. [2023-11-21 18:59:13,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 18:59:13,499 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2023-11-21 18:59:13,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:13,501 INFO L225 Difference]: With dead ends: 284 [2023-11-21 18:59:13,501 INFO L226 Difference]: Without dead ends: 283 [2023-11-21 18:59:13,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:59:13,502 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 78 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:13,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 221 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 18:59:13,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2023-11-21 18:59:13,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 257. [2023-11-21 18:59:13,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 185 states have (on average 1.6432432432432433) internal successors, (304), 234 states have internal predecessors, (304), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-21 18:59:13,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 344 transitions. [2023-11-21 18:59:13,521 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 344 transitions. Word has length 28 [2023-11-21 18:59:13,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:13,521 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 344 transitions. [2023-11-21 18:59:13,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 18:59:13,522 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 344 transitions. [2023-11-21 18:59:13,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-21 18:59:13,522 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:13,522 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:13,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:13,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-21 18:59:13,743 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 47 more)] === [2023-11-21 18:59:13,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:13,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1754192517, now seen corresponding path program 1 times [2023-11-21 18:59:13,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:13,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439886311] [2023-11-21 18:59:13,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:13,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:13,753 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 18:59:13,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [957832028] [2023-11-21 18:59:13,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:13,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:13,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:13,755 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:13,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-21 18:59:13,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:13,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 18:59:13,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:13,879 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 18:59:13,879 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:13,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:13,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439886311] [2023-11-21 18:59:13,879 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 18:59:13,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957832028] [2023-11-21 18:59:13,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957832028] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:13,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:13,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 18:59:13,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825856095] [2023-11-21 18:59:13,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:13,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 18:59:13,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:13,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 18:59:13,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:59:13,882 INFO L87 Difference]: Start difference. First operand 257 states and 344 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, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 18:59:14,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:14,044 INFO L93 Difference]: Finished difference Result 308 states and 360 transitions. [2023-11-21 18:59:14,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 18:59:14,044 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, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2023-11-21 18:59:14,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:14,047 INFO L225 Difference]: With dead ends: 308 [2023-11-21 18:59:14,047 INFO L226 Difference]: Without dead ends: 307 [2023-11-21 18:59:14,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:59:14,048 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 174 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:14,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 332 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:59:14,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2023-11-21 18:59:14,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 259. [2023-11-21 18:59:14,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 187 states have (on average 1.6363636363636365) internal successors, (306), 236 states have internal predecessors, (306), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-21 18:59:14,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 346 transitions. [2023-11-21 18:59:14,068 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 346 transitions. Word has length 28 [2023-11-21 18:59:14,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:14,069 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 346 transitions. [2023-11-21 18:59:14,069 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, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 18:59:14,069 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 346 transitions. [2023-11-21 18:59:14,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-21 18:59:14,070 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:14,070 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:14,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:14,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-21 18:59:14,286 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr47ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 47 more)] === [2023-11-21 18:59:14,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:14,286 INFO L85 PathProgramCache]: Analyzing trace with hash 2074201085, now seen corresponding path program 1 times [2023-11-21 18:59:14,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:14,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565904603] [2023-11-21 18:59:14,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:14,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:14,296 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 18:59:14,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1648873930] [2023-11-21 18:59:14,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:14,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:14,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:14,302 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:14,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-21 18:59:14,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:14,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 18:59:14,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:14,419 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 18:59:14,419 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:14,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:14,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565904603] [2023-11-21 18:59:14,420 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 18:59:14,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648873930] [2023-11-21 18:59:14,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648873930] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:14,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:14,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 18:59:14,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268262498] [2023-11-21 18:59:14,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:14,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 18:59:14,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:14,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 18:59:14,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 18:59:14,422 INFO L87 Difference]: Start difference. First operand 259 states and 346 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 18:59:14,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:14,601 INFO L93 Difference]: Finished difference Result 285 states and 351 transitions. [2023-11-21 18:59:14,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 18:59:14,602 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), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2023-11-21 18:59:14,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:14,604 INFO L225 Difference]: With dead ends: 285 [2023-11-21 18:59:14,604 INFO L226 Difference]: Without dead ends: 284 [2023-11-21 18:59:14,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:59:14,606 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 75 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:14,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 222 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 18:59:14,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2023-11-21 18:59:14,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 260. [2023-11-21 18:59:14,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 188 states have (on average 1.6329787234042554) internal successors, (307), 237 states have internal predecessors, (307), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-21 18:59:14,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 347 transitions. [2023-11-21 18:59:14,624 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 347 transitions. Word has length 29 [2023-11-21 18:59:14,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:14,624 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 347 transitions. [2023-11-21 18:59:14,625 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), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 18:59:14,625 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 347 transitions. [2023-11-21 18:59:14,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-21 18:59:14,626 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:14,626 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:14,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:14,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-21 18:59:14,842 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr48ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 47 more)] === [2023-11-21 18:59:14,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:14,842 INFO L85 PathProgramCache]: Analyzing trace with hash -124275613, now seen corresponding path program 1 times [2023-11-21 18:59:14,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:14,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093432058] [2023-11-21 18:59:14,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:14,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:14,852 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 18:59:14,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1611296648] [2023-11-21 18:59:14,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:14,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:14,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:14,863 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:14,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-21 18:59:14,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:14,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 18:59:14,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:15,171 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 18:59:15,171 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:15,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:15,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093432058] [2023-11-21 18:59:15,172 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 18:59:15,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611296648] [2023-11-21 18:59:15,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611296648] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:15,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:15,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 18:59:15,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973730736] [2023-11-21 18:59:15,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:15,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 18:59:15,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:15,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 18:59:15,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:59:15,174 INFO L87 Difference]: Start difference. First operand 260 states and 347 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 18:59:15,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:15,762 INFO L93 Difference]: Finished difference Result 284 states and 350 transitions. [2023-11-21 18:59:15,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 18:59:15,763 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2023-11-21 18:59:15,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:15,765 INFO L225 Difference]: With dead ends: 284 [2023-11-21 18:59:15,765 INFO L226 Difference]: Without dead ends: 283 [2023-11-21 18:59:15,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-21 18:59:15,766 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 182 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:15,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 139 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 18:59:15,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2023-11-21 18:59:15,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 261. [2023-11-21 18:59:15,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 189 states have (on average 1.6296296296296295) internal successors, (308), 238 states have internal predecessors, (308), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-21 18:59:15,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 348 transitions. [2023-11-21 18:59:15,784 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 348 transitions. Word has length 30 [2023-11-21 18:59:15,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:15,784 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 348 transitions. [2023-11-21 18:59:15,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 18:59:15,785 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 348 transitions. [2023-11-21 18:59:15,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-21 18:59:15,785 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:15,786 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:15,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-21 18:59:16,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:16,007 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr49ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 47 more)] === [2023-11-21 18:59:16,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:16,007 INFO L85 PathProgramCache]: Analyzing trace with hash 442423487, now seen corresponding path program 1 times [2023-11-21 18:59:16,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:16,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009660262] [2023-11-21 18:59:16,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:16,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:16,015 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 18:59:16,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1811917093] [2023-11-21 18:59:16,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:16,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:16,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:16,017 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:16,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-21 18:59:16,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:16,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-21 18:59:16,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:16,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 18:59:16,274 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:16,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:16,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009660262] [2023-11-21 18:59:16,275 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 18:59:16,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811917093] [2023-11-21 18:59:16,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811917093] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:16,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:16,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 18:59:16,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215613134] [2023-11-21 18:59:16,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:16,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 18:59:16,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:16,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 18:59:16,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:59:16,277 INFO L87 Difference]: Start difference. First operand 261 states and 348 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 18:59:16,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:16,584 INFO L93 Difference]: Finished difference Result 283 states and 349 transitions. [2023-11-21 18:59:16,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 18:59:16,585 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2023-11-21 18:59:16,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:16,587 INFO L225 Difference]: With dead ends: 283 [2023-11-21 18:59:16,587 INFO L226 Difference]: Without dead ends: 268 [2023-11-21 18:59:16,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-21 18:59:16,589 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 69 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:16,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 180 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 18:59:16,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2023-11-21 18:59:16,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 248. [2023-11-21 18:59:16,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 176 states have (on average 1.6704545454545454) internal successors, (294), 225 states have internal predecessors, (294), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-21 18:59:16,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 334 transitions. [2023-11-21 18:59:16,616 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 334 transitions. Word has length 31 [2023-11-21 18:59:16,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:16,617 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 334 transitions. [2023-11-21 18:59:16,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-21 18:59:16,617 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 334 transitions. [2023-11-21 18:59:16,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-21 18:59:16,618 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:16,618 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2023-11-21 18:59:16,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:16,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:16,842 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 47 more)] === [2023-11-21 18:59:16,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:16,842 INFO L85 PathProgramCache]: Analyzing trace with hash -2012736896, now seen corresponding path program 1 times [2023-11-21 18:59:16,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:16,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805118520] [2023-11-21 18:59:16,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:16,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:16,860 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 18:59:16,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1681366221] [2023-11-21 18:59:16,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:16,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:16,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:16,863 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:16,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-21 18:59:16,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:16,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 18:59:16,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:17,004 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 18:59:17,005 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:59:17,095 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 18:59:17,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:17,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805118520] [2023-11-21 18:59:17,095 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 18:59:17,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681366221] [2023-11-21 18:59:17,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681366221] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:59:17,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1391271673] [2023-11-21 18:59:17,117 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-11-21 18:59:17,117 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 18:59:17,121 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 18:59:17,126 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 18:59:17,127 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 18:59:18,419 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-21 18:59:18,421 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 18:59:20,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1391271673] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:20,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-21 18:59:20,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [7, 7] total 20 [2023-11-21 18:59:20,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5560596] [2023-11-21 18:59:20,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:20,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-21 18:59:20,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:20,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-21 18:59:20,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2023-11-21 18:59:20,069 INFO L87 Difference]: Start difference. First operand 248 states and 334 transitions. Second operand has 15 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-21 18:59:21,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:21,565 INFO L93 Difference]: Finished difference Result 404 states and 516 transitions. [2023-11-21 18:59:21,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-21 18:59:21,566 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 31 [2023-11-21 18:59:21,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:21,569 INFO L225 Difference]: With dead ends: 404 [2023-11-21 18:59:21,569 INFO L226 Difference]: Without dead ends: 358 [2023-11-21 18:59:21,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2023-11-21 18:59:21,571 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 519 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:21,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [531 Valid, 151 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-21 18:59:21,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2023-11-21 18:59:21,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 318. [2023-11-21 18:59:21,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 238 states have (on average 1.5714285714285714) internal successors, (374), 287 states have internal predecessors, (374), 28 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2023-11-21 18:59:21,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 430 transitions. [2023-11-21 18:59:21,618 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 430 transitions. Word has length 31 [2023-11-21 18:59:21,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:21,618 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 430 transitions. [2023-11-21 18:59:21,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-21 18:59:21,618 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 430 transitions. [2023-11-21 18:59:21,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-21 18:59:21,619 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:21,619 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:21,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:21,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:21,839 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 47 more)] === [2023-11-21 18:59:21,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:21,840 INFO L85 PathProgramCache]: Analyzing trace with hash -615192625, now seen corresponding path program 1 times [2023-11-21 18:59:21,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:21,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600006927] [2023-11-21 18:59:21,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:21,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:21,854 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 18:59:21,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1756144044] [2023-11-21 18:59:21,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:21,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:21,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:21,855 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:21,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-21 18:59:21,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:21,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 18:59:21,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:22,022 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-21 18:59:22,022 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:22,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:22,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600006927] [2023-11-21 18:59:22,023 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 18:59:22,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756144044] [2023-11-21 18:59:22,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756144044] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:22,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:22,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 18:59:22,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776836636] [2023-11-21 18:59:22,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:22,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 18:59:22,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:22,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 18:59:22,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:59:22,028 INFO L87 Difference]: Start difference. First operand 318 states and 430 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-21 18:59:22,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:22,669 INFO L93 Difference]: Finished difference Result 409 states and 521 transitions. [2023-11-21 18:59:22,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 18:59:22,669 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2023-11-21 18:59:22,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:22,674 INFO L225 Difference]: With dead ends: 409 [2023-11-21 18:59:22,674 INFO L226 Difference]: Without dead ends: 406 [2023-11-21 18:59:22,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-21 18:59:22,675 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 256 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:22,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 238 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-21 18:59:22,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2023-11-21 18:59:22,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 374. [2023-11-21 18:59:22,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 286 states have (on average 1.5174825174825175) internal successors, (434), 335 states have internal predecessors, (434), 36 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2023-11-21 18:59:22,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 506 transitions. [2023-11-21 18:59:22,740 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 506 transitions. Word has length 46 [2023-11-21 18:59:22,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:22,740 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 506 transitions. [2023-11-21 18:59:22,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-21 18:59:22,741 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 506 transitions. [2023-11-21 18:59:22,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-21 18:59:22,741 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:22,742 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:22,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-21 18:59:22,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:22,958 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 47 more)] === [2023-11-21 18:59:22,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:22,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1891102077, now seen corresponding path program 1 times [2023-11-21 18:59:22,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:22,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483854453] [2023-11-21 18:59:22,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:22,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:22,967 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 18:59:22,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2085795069] [2023-11-21 18:59:22,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:22,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:22,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:22,983 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:22,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-21 18:59:23,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:23,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 18:59:23,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:23,133 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-21 18:59:23,133 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:23,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:23,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483854453] [2023-11-21 18:59:23,134 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 18:59:23,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085795069] [2023-11-21 18:59:23,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085795069] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:23,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:23,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 18:59:23,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738059482] [2023-11-21 18:59:23,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:23,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 18:59:23,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:23,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 18:59:23,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:59:23,136 INFO L87 Difference]: Start difference. First operand 374 states and 506 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-21 18:59:23,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:23,543 INFO L93 Difference]: Finished difference Result 406 states and 515 transitions. [2023-11-21 18:59:23,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 18:59:23,543 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 47 [2023-11-21 18:59:23,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:23,546 INFO L225 Difference]: With dead ends: 406 [2023-11-21 18:59:23,546 INFO L226 Difference]: Without dead ends: 405 [2023-11-21 18:59:23,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-21 18:59:23,547 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 272 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:23,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 187 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 18:59:23,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2023-11-21 18:59:23,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 374. [2023-11-21 18:59:23,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 286 states have (on average 1.5104895104895104) internal successors, (432), 335 states have internal predecessors, (432), 36 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2023-11-21 18:59:23,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 504 transitions. [2023-11-21 18:59:23,604 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 504 transitions. Word has length 47 [2023-11-21 18:59:23,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:23,605 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 504 transitions. [2023-11-21 18:59:23,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-21 18:59:23,605 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 504 transitions. [2023-11-21 18:59:23,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-21 18:59:23,606 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:23,606 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:23,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:23,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-21 18:59:23,826 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 47 more)] === [2023-11-21 18:59:23,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:23,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1332532104, now seen corresponding path program 1 times [2023-11-21 18:59:23,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:23,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827680782] [2023-11-21 18:59:23,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:23,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:23,836 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 18:59:23,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [887571131] [2023-11-21 18:59:23,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:23,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:23,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:23,840 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:23,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-21 18:59:23,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:23,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 18:59:23,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:23,963 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-21 18:59:23,963 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:23,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:23,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827680782] [2023-11-21 18:59:23,964 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 18:59:23,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887571131] [2023-11-21 18:59:23,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887571131] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:23,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:23,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 18:59:23,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637176921] [2023-11-21 18:59:23,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:23,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 18:59:23,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:23,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 18:59:23,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:59:23,967 INFO L87 Difference]: Start difference. First operand 374 states and 504 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-21 18:59:24,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:24,638 INFO L93 Difference]: Finished difference Result 409 states and 521 transitions. [2023-11-21 18:59:24,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 18:59:24,639 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 51 [2023-11-21 18:59:24,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:24,642 INFO L225 Difference]: With dead ends: 409 [2023-11-21 18:59:24,643 INFO L226 Difference]: Without dead ends: 407 [2023-11-21 18:59:24,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-21 18:59:24,644 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 292 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:24,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 242 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-21 18:59:24,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2023-11-21 18:59:24,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 376. [2023-11-21 18:59:24,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 288 states have (on average 1.5) internal successors, (432), 337 states have internal predecessors, (432), 36 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2023-11-21 18:59:24,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 504 transitions. [2023-11-21 18:59:24,701 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 504 transitions. Word has length 51 [2023-11-21 18:59:24,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:24,702 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 504 transitions. [2023-11-21 18:59:24,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-21 18:59:24,702 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 504 transitions. [2023-11-21 18:59:24,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-21 18:59:24,703 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:24,703 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:24,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:24,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-21 18:59:24,922 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 47 more)] === [2023-11-21 18:59:24,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:24,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1641177855, now seen corresponding path program 1 times [2023-11-21 18:59:24,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:24,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151740449] [2023-11-21 18:59:24,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:24,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:24,939 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 18:59:24,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1669557558] [2023-11-21 18:59:24,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:24,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:24,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:24,940 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:24,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-21 18:59:24,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:24,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 18:59:24,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:25,058 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-21 18:59:25,058 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:25,058 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:25,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151740449] [2023-11-21 18:59:25,059 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 18:59:25,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669557558] [2023-11-21 18:59:25,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669557558] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:25,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:25,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 18:59:25,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018083895] [2023-11-21 18:59:25,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:25,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 18:59:25,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:25,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 18:59:25,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:59:25,061 INFO L87 Difference]: Start difference. First operand 376 states and 504 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-21 18:59:25,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:25,465 INFO L93 Difference]: Finished difference Result 409 states and 517 transitions. [2023-11-21 18:59:25,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 18:59:25,471 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 52 [2023-11-21 18:59:25,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:25,474 INFO L225 Difference]: With dead ends: 409 [2023-11-21 18:59:25,474 INFO L226 Difference]: Without dead ends: 407 [2023-11-21 18:59:25,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-21 18:59:25,476 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 287 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:25,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 244 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 18:59:25,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2023-11-21 18:59:25,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 378. [2023-11-21 18:59:25,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 290 states have (on average 1.4896551724137932) internal successors, (432), 339 states have internal predecessors, (432), 36 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2023-11-21 18:59:25,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 504 transitions. [2023-11-21 18:59:25,536 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 504 transitions. Word has length 52 [2023-11-21 18:59:25,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:25,536 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 504 transitions. [2023-11-21 18:59:25,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-21 18:59:25,537 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 504 transitions. [2023-11-21 18:59:25,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-21 18:59:25,539 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:25,539 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:25,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:25,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-21 18:59:25,755 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 47 more)] === [2023-11-21 18:59:25,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:25,755 INFO L85 PathProgramCache]: Analyzing trace with hash 918924942, now seen corresponding path program 1 times [2023-11-21 18:59:25,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:25,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025683758] [2023-11-21 18:59:25,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:25,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:25,765 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 18:59:25,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [120246424] [2023-11-21 18:59:25,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:25,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:25,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:25,767 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:25,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-21 18:59:25,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:25,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 18:59:25,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:25,884 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-21 18:59:25,885 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:25,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:25,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025683758] [2023-11-21 18:59:25,886 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 18:59:25,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120246424] [2023-11-21 18:59:25,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120246424] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:25,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:25,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 18:59:25,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571701622] [2023-11-21 18:59:25,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:25,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:59:25,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:25,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:59:25,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:59:25,888 INFO L87 Difference]: Start difference. First operand 378 states and 504 transitions. Second operand has 3 states, 2 states have (on average 16.0) internal successors, (32), 3 states have internal predecessors, (32), 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) [2023-11-21 18:59:26,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:26,001 INFO L93 Difference]: Finished difference Result 529 states and 722 transitions. [2023-11-21 18:59:26,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:59:26,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 16.0) internal successors, (32), 3 states have internal predecessors, (32), 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 54 [2023-11-21 18:59:26,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:26,006 INFO L225 Difference]: With dead ends: 529 [2023-11-21 18:59:26,006 INFO L226 Difference]: Without dead ends: 528 [2023-11-21 18:59:26,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:59:26,007 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 30 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:26,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 213 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 18:59:26,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2023-11-21 18:59:26,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 485. [2023-11-21 18:59:26,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 381 states have (on average 1.5144356955380578) internal successors, (577), 430 states have internal predecessors, (577), 52 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2023-11-21 18:59:26,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 681 transitions. [2023-11-21 18:59:26,100 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 681 transitions. Word has length 54 [2023-11-21 18:59:26,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:26,101 INFO L495 AbstractCegarLoop]: Abstraction has 485 states and 681 transitions. [2023-11-21 18:59:26,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 16.0) internal successors, (32), 3 states have internal predecessors, (32), 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) [2023-11-21 18:59:26,101 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 681 transitions. [2023-11-21 18:59:26,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-21 18:59:26,103 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:26,103 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:26,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:26,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:26,318 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 47 more)] === [2023-11-21 18:59:26,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:26,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1578097731, now seen corresponding path program 1 times [2023-11-21 18:59:26,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:26,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104362810] [2023-11-21 18:59:26,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:26,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:26,326 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 18:59:26,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [115931457] [2023-11-21 18:59:26,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:26,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:26,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:26,328 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:26,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-21 18:59:26,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:26,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 18:59:26,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:26,495 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-21 18:59:26,496 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:26,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:26,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104362810] [2023-11-21 18:59:26,498 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 18:59:26,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115931457] [2023-11-21 18:59:26,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115931457] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:26,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:26,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 18:59:26,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273180751] [2023-11-21 18:59:26,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:26,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 18:59:26,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:26,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 18:59:26,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-21 18:59:26,500 INFO L87 Difference]: Start difference. First operand 485 states and 681 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 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) [2023-11-21 18:59:26,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:26,924 INFO L93 Difference]: Finished difference Result 514 states and 692 transitions. [2023-11-21 18:59:26,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 18:59:26,924 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 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 55 [2023-11-21 18:59:26,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:26,928 INFO L225 Difference]: With dead ends: 514 [2023-11-21 18:59:26,928 INFO L226 Difference]: Without dead ends: 513 [2023-11-21 18:59:26,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-21 18:59:26,929 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 248 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:26,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 292 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 18:59:26,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2023-11-21 18:59:26,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 485. [2023-11-21 18:59:27,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 381 states have (on average 1.5118110236220472) internal successors, (576), 430 states have internal predecessors, (576), 52 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2023-11-21 18:59:27,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 680 transitions. [2023-11-21 18:59:27,003 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 680 transitions. Word has length 55 [2023-11-21 18:59:27,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:27,004 INFO L495 AbstractCegarLoop]: Abstraction has 485 states and 680 transitions. [2023-11-21 18:59:27,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 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) [2023-11-21 18:59:27,004 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 680 transitions. [2023-11-21 18:59:27,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-21 18:59:27,005 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:27,005 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:27,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-21 18:59:27,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-21 18:59:27,222 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 47 more)] === [2023-11-21 18:59:27,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:27,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1676389264, now seen corresponding path program 1 times [2023-11-21 18:59:27,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:27,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380001158] [2023-11-21 18:59:27,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:27,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:27,234 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 18:59:27,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [548156105] [2023-11-21 18:59:27,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:27,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:27,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:27,236 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:27,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-21 18:59:27,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:27,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 18:59:27,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:27,416 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-21 18:59:27,417 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:27,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:27,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380001158] [2023-11-21 18:59:27,417 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 18:59:27,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548156105] [2023-11-21 18:59:27,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548156105] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:27,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:27,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 18:59:27,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203970111] [2023-11-21 18:59:27,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:27,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 18:59:27,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:27,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 18:59:27,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 18:59:27,421 INFO L87 Difference]: Start difference. First operand 485 states and 680 transitions. Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 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) [2023-11-21 18:59:27,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:27,734 INFO L93 Difference]: Finished difference Result 485 states and 680 transitions. [2023-11-21 18:59:27,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 18:59:27,735 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), 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 56 [2023-11-21 18:59:27,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:27,738 INFO L225 Difference]: With dead ends: 485 [2023-11-21 18:59:27,738 INFO L226 Difference]: Without dead ends: 483 [2023-11-21 18:59:27,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 18:59:27,739 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 48 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:27,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 180 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 18:59:27,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2023-11-21 18:59:27,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 483. [2023-11-21 18:59:27,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 381 states have (on average 1.4881889763779528) internal successors, (567), 428 states have internal predecessors, (567), 52 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2023-11-21 18:59:27,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 671 transitions. [2023-11-21 18:59:27,812 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 671 transitions. Word has length 56 [2023-11-21 18:59:27,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:27,813 INFO L495 AbstractCegarLoop]: Abstraction has 483 states and 671 transitions. [2023-11-21 18:59:27,813 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), 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) [2023-11-21 18:59:27,813 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 671 transitions. [2023-11-21 18:59:27,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-21 18:59:27,819 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:27,819 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:27,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:28,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-21 18:59:28,039 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 47 more)] === [2023-11-21 18:59:28,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:28,039 INFO L85 PathProgramCache]: Analyzing trace with hash -428459489, now seen corresponding path program 1 times [2023-11-21 18:59:28,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:28,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723618348] [2023-11-21 18:59:28,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:28,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:28,048 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 18:59:28,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1434976855] [2023-11-21 18:59:28,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:28,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:28,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:28,050 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:28,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-21 18:59:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:28,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 18:59:28,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:28,217 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-21 18:59:28,217 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:28,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:28,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723618348] [2023-11-21 18:59:28,217 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 18:59:28,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434976855] [2023-11-21 18:59:28,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434976855] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:28,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:28,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 18:59:28,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070362292] [2023-11-21 18:59:28,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:28,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 18:59:28,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:28,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 18:59:28,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 18:59:28,220 INFO L87 Difference]: Start difference. First operand 483 states and 671 transitions. Second operand has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 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) [2023-11-21 18:59:28,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:28,374 INFO L93 Difference]: Finished difference Result 562 states and 718 transitions. [2023-11-21 18:59:28,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 18:59:28,374 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 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 57 [2023-11-21 18:59:28,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:28,378 INFO L225 Difference]: With dead ends: 562 [2023-11-21 18:59:28,378 INFO L226 Difference]: Without dead ends: 560 [2023-11-21 18:59:28,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 18:59:28,379 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 110 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:28,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 240 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:59:28,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2023-11-21 18:59:28,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 499. [2023-11-21 18:59:28,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 397 states have (on average 1.473551637279597) internal successors, (585), 444 states have internal predecessors, (585), 52 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2023-11-21 18:59:28,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 689 transitions. [2023-11-21 18:59:28,450 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 689 transitions. Word has length 57 [2023-11-21 18:59:28,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:28,451 INFO L495 AbstractCegarLoop]: Abstraction has 499 states and 689 transitions. [2023-11-21 18:59:28,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 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) [2023-11-21 18:59:28,451 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 689 transitions. [2023-11-21 18:59:28,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-21 18:59:28,452 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:28,452 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:28,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-21 18:59:28,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-21 18:59:28,666 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 47 more)] === [2023-11-21 18:59:28,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:28,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1635034248, now seen corresponding path program 1 times [2023-11-21 18:59:28,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:28,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084194380] [2023-11-21 18:59:28,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:28,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:28,675 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 18:59:28,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [128760596] [2023-11-21 18:59:28,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:28,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:28,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:28,677 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:28,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6083addc-d2f1-436f-9166-811bace0f83b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-21 18:59:28,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:28,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-21 18:59:28,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:28,872 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-21 18:59:28,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:59:29,008 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-21 18:59:29,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:29,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084194380] [2023-11-21 18:59:29,009 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 18:59:29,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128760596] [2023-11-21 18:59:29,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128760596] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:59:29,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [980967132] [2023-11-21 18:59:29,013 INFO L159 IcfgInterpreter]: Started Sifa with 46 locations of interest [2023-11-21 18:59:29,013 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 18:59:29,013 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 18:59:29,014 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 18:59:29,014 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 18:59:31,194 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2023-11-21 18:59:31,196 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-21 18:59:31,197 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 18:59:35,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [980967132] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:35,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-21 18:59:35,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [6, 6] total 29 [2023-11-21 18:59:35,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056101764] [2023-11-21 18:59:35,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:35,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-21 18:59:35,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:35,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-21 18:59:35,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=645, Unknown=0, NotChecked=0, Total=870 [2023-11-21 18:59:35,156 INFO L87 Difference]: Start difference. First operand 499 states and 689 transitions. Second operand has 20 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-21 18:59:45,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-21 18:59:48,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-21 18:59:55,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-21 18:59:59,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers []