./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh --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 0bd5c2784fe43830be309c722c3fa9fc4d3ef116c17a8343acb2a2dfbcf830c0 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 08:19:42,952 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 08:19:43,017 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-12-02 08:19:43,021 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 08:19:43,022 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 08:19:43,043 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 08:19:43,043 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 08:19:43,044 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 08:19:43,044 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 08:19:43,045 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 08:19:43,045 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 08:19:43,046 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 08:19:43,046 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 08:19:43,047 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 08:19:43,047 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 08:19:43,048 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 08:19:43,048 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 08:19:43,049 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 08:19:43,049 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 08:19:43,050 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 08:19:43,051 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 08:19:43,052 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 08:19:43,053 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 08:19:43,054 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 08:19:43,054 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 08:19:43,055 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 08:19:43,055 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 08:19:43,055 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 08:19:43,056 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 08:19:43,056 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 08:19:43,057 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 08:19:43,057 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-12-02 08:19:43,057 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 08:19:43,057 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 08:19:43,058 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 08:19:43,058 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 08:19:43,058 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 08:19:43,058 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 08:19:43,058 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 08:19:43,059 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 08:19:43,059 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 08:19:43,059 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 08:19:43,059 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 08:19:43,060 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 08:19:43,060 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 08:19:43,060 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 08:19:43,060 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 08:19:43,060 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 08:19:43,060 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 08:19:43,061 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_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bd5c2784fe43830be309c722c3fa9fc4d3ef116c17a8343acb2a2dfbcf830c0 [2023-12-02 08:19:43,268 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 08:19:43,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 08:19:43,299 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 08:19:43,300 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 08:19:43,301 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 08:19:43,302 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound100.c [2023-12-02 08:19:46,153 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 08:19:46,302 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 08:19:46,303 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound100.c [2023-12-02 08:19:46,309 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/data/980ed617a/bfb07642f96b4d0a970483e88d862f94/FLAG7575e372b [2023-12-02 08:19:46,321 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/data/980ed617a/bfb07642f96b4d0a970483e88d862f94 [2023-12-02 08:19:46,323 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 08:19:46,325 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 08:19:46,326 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 08:19:46,326 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 08:19:46,330 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 08:19:46,331 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:19:46" (1/1) ... [2023-12-02 08:19:46,332 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53cc9e89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:19:46, skipping insertion in model container [2023-12-02 08:19:46,332 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:19:46" (1/1) ... [2023-12-02 08:19:46,349 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 08:19:46,493 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 08:19:46,505 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 08:19:46,522 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 08:19:46,536 INFO L206 MainTranslator]: Completed translation [2023-12-02 08:19:46,536 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:19:46 WrapperNode [2023-12-02 08:19:46,536 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 08:19:46,537 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 08:19:46,538 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 08:19:46,538 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 08:19:46,544 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:19:46" (1/1) ... [2023-12-02 08:19:46,550 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:19:46" (1/1) ... [2023-12-02 08:19:46,571 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 76 [2023-12-02 08:19:46,571 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 08:19:46,572 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 08:19:46,572 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 08:19:46,572 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 08:19:46,581 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:19:46" (1/1) ... [2023-12-02 08:19:46,581 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:19:46" (1/1) ... [2023-12-02 08:19:46,583 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:19:46" (1/1) ... [2023-12-02 08:19:46,583 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:19:46" (1/1) ... [2023-12-02 08:19:46,587 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:19:46" (1/1) ... [2023-12-02 08:19:46,591 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:19:46" (1/1) ... [2023-12-02 08:19:46,592 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:19:46" (1/1) ... [2023-12-02 08:19:46,593 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:19:46" (1/1) ... [2023-12-02 08:19:46,596 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 08:19:46,597 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 08:19:46,597 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 08:19:46,597 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 08:19:46,598 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:19:46" (1/1) ... [2023-12-02 08:19:46,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 08:19:46,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:19:46,638 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 08:19:46,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 08:19:46,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 08:19:46,678 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 08:19:46,678 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 08:19:46,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 08:19:46,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 08:19:46,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 08:19:46,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 08:19:46,680 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 08:19:46,745 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 08:19:46,746 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 08:19:46,987 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 08:19:47,027 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 08:19:47,028 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 08:19:47,029 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:19:47 BoogieIcfgContainer [2023-12-02 08:19:47,030 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 08:19:47,033 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 08:19:47,034 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 08:19:47,038 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 08:19:47,038 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 08:19:46" (1/3) ... [2023-12-02 08:19:47,039 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b554690 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:19:47, skipping insertion in model container [2023-12-02 08:19:47,039 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:19:46" (2/3) ... [2023-12-02 08:19:47,039 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b554690 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:19:47, skipping insertion in model container [2023-12-02 08:19:47,040 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:19:47" (3/3) ... [2023-12-02 08:19:47,041 INFO L112 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound100.c [2023-12-02 08:19:47,064 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 08:19:47,064 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2023-12-02 08:19:47,114 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 08:19:47,122 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;@4992f3b5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 08:19:47,122 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-12-02 08:19:47,127 INFO L276 IsEmpty]: Start isEmpty. Operand has 60 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 53 states have internal predecessors, (57), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 08:19:47,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 08:19:47,135 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:19:47,136 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:19:47,136 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:19:47,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:19:47,142 INFO L85 PathProgramCache]: Analyzing trace with hash -129934665, now seen corresponding path program 1 times [2023-12-02 08:19:47,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:19:47,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058979119] [2023-12-02 08:19:47,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:47,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:19:47,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:47,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:19:47,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058979119] [2023-12-02 08:19:47,277 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-02 08:19:47,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565256082] [2023-12-02 08:19:47,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:47,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:19:47,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:19:47,281 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:19:47,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 08:19:47,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:47,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-02 08:19:47,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:19:47,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 08:19:47,382 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:19:47,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565256082] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:19:47,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:19:47,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 08:19:47,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43022330] [2023-12-02 08:19:47,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:19:47,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 08:19:47,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:19:47,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 08:19:47,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 08:19:47,423 INFO L87 Difference]: Start difference. First operand has 60 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 53 states have internal predecessors, (57), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 08:19:47,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:19:47,453 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2023-12-02 08:19:47,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 08:19:47,456 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 10 [2023-12-02 08:19:47,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:19:47,465 INFO L225 Difference]: With dead ends: 73 [2023-12-02 08:19:47,465 INFO L226 Difference]: Without dead ends: 57 [2023-12-02 08:19:47,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 08:19:47,473 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 08:19:47,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 08:19:47,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-12-02 08:19:47,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-12-02 08:19:47,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 30 states have (on average 1.8) internal successors, (54), 51 states have internal predecessors, (54), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 08:19:47,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2023-12-02 08:19:47,544 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 10 [2023-12-02 08:19:47,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:19:47,546 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2023-12-02 08:19:47,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 08:19:47,546 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2023-12-02 08:19:47,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 08:19:47,548 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:19:47,548 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:19:47,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 08:19:47,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-02 08:19:47,749 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:19:47,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:19:47,750 INFO L85 PathProgramCache]: Analyzing trace with hash -129936426, now seen corresponding path program 1 times [2023-12-02 08:19:47,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:19:47,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641061763] [2023-12-02 08:19:47,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:47,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:19:47,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:47,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 08:19:47,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:19:47,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641061763] [2023-12-02 08:19:47,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641061763] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:19:47,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:19:47,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 08:19:47,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717443978] [2023-12-02 08:19:47,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:19:47,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 08:19:47,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:19:47,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 08:19:47,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 08:19:47,881 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 08:19:47,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:19:47,937 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2023-12-02 08:19:47,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 08:19:47,937 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 10 [2023-12-02 08:19:47,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:19:47,939 INFO L225 Difference]: With dead ends: 71 [2023-12-02 08:19:47,939 INFO L226 Difference]: Without dead ends: 61 [2023-12-02 08:19:47,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 08:19:47,941 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 7 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 08:19:47,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 152 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 08:19:47,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-12-02 08:19:47,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-12-02 08:19:47,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 55 states have internal predecessors, (58), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 08:19:47,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2023-12-02 08:19:47,950 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 10 [2023-12-02 08:19:47,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:19:47,951 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2023-12-02 08:19:47,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 08:19:47,951 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2023-12-02 08:19:47,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 08:19:47,952 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:19:47,952 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:19:47,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 08:19:47,952 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:19:47,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:19:47,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1170489416, now seen corresponding path program 1 times [2023-12-02 08:19:47,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:19:47,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023287679] [2023-12-02 08:19:47,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:47,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:19:47,968 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:19:47,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [409590673] [2023-12-02 08:19:47,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:47,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:19:47,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:19:47,970 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:19:47,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 08:19:48,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:48,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 08:19:48,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:19:48,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 08:19:48,194 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:19:48,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:19:48,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023287679] [2023-12-02 08:19:48,195 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:19:48,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409590673] [2023-12-02 08:19:48,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409590673] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:19:48,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:19:48,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 08:19:48,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111788746] [2023-12-02 08:19:48,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:19:48,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 08:19:48,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:19:48,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 08:19:48,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-02 08:19:48,198 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 6 states, 3 states have (on average 3.0) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 08:19:48,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:19:48,333 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2023-12-02 08:19:48,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 08:19:48,334 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 3 states have (on average 3.0) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2023-12-02 08:19:48,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:19:48,336 INFO L225 Difference]: With dead ends: 106 [2023-12-02 08:19:48,337 INFO L226 Difference]: Without dead ends: 100 [2023-12-02 08:19:48,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-02 08:19:48,339 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 86 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:19:48,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 96 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:19:48,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-12-02 08:19:48,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 84. [2023-12-02 08:19:48,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 56 states have (on average 1.6964285714285714) internal successors, (95), 77 states have internal predecessors, (95), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 08:19:48,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 103 transitions. [2023-12-02 08:19:48,354 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 103 transitions. Word has length 13 [2023-12-02 08:19:48,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:19:48,355 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 103 transitions. [2023-12-02 08:19:48,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 3 states have (on average 3.0) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 08:19:48,355 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 103 transitions. [2023-12-02 08:19:48,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 08:19:48,356 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:19:48,356 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:19:48,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 08:19:48,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:19:48,557 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:19:48,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:19:48,558 INFO L85 PathProgramCache]: Analyzing trace with hash 441104474, now seen corresponding path program 1 times [2023-12-02 08:19:48,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:19:48,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898912661] [2023-12-02 08:19:48,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:48,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:19:48,570 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:19:48,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [753130708] [2023-12-02 08:19:48,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:48,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:19:48,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:19:48,572 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:19:48,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 08:19:48,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:48,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 08:19:48,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:19:48,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 08:19:48,648 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:19:48,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:19:48,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898912661] [2023-12-02 08:19:48,648 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:19:48,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753130708] [2023-12-02 08:19:48,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753130708] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:19:48,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:19:48,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 08:19:48,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355161772] [2023-12-02 08:19:48,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:19:48,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 08:19:48,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:19:48,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 08:19:48,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 08:19:48,651 INFO L87 Difference]: Start difference. First operand 84 states and 103 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 08:19:48,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:19:48,713 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2023-12-02 08:19:48,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 08:19:48,714 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2023-12-02 08:19:48,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:19:48,715 INFO L225 Difference]: With dead ends: 94 [2023-12-02 08:19:48,716 INFO L226 Difference]: Without dead ends: 88 [2023-12-02 08:19:48,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 08:19:48,717 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 45 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 08:19:48,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 47 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 08:19:48,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-12-02 08:19:48,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2023-12-02 08:19:48,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 62 states have (on average 1.564516129032258) internal successors, (97), 79 states have internal predecessors, (97), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 08:19:48,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 105 transitions. [2023-12-02 08:19:48,731 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 105 transitions. Word has length 15 [2023-12-02 08:19:48,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:19:48,732 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 105 transitions. [2023-12-02 08:19:48,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 08:19:48,732 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 105 transitions. [2023-12-02 08:19:48,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 08:19:48,733 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:19:48,733 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:19:48,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 08:19:48,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:19:48,934 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:19:48,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:19:48,935 INFO L85 PathProgramCache]: Analyzing trace with hash 789336863, now seen corresponding path program 1 times [2023-12-02 08:19:48,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:19:48,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863916856] [2023-12-02 08:19:48,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:48,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:19:48,943 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:19:48,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [823344808] [2023-12-02 08:19:48,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:48,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:19:48,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:19:48,945 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:19:48,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 08:19:48,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:48,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 08:19:48,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:19:49,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 08:19:49,018 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:19:49,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:19:49,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863916856] [2023-12-02 08:19:49,019 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:19:49,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823344808] [2023-12-02 08:19:49,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823344808] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:19:49,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:19:49,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 08:19:49,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899211678] [2023-12-02 08:19:49,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:19:49,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 08:19:49,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:19:49,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 08:19:49,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 08:19:49,022 INFO L87 Difference]: Start difference. First operand 86 states and 105 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, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 08:19:49,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:19:49,106 INFO L93 Difference]: Finished difference Result 135 states and 162 transitions. [2023-12-02 08:19:49,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 08:19:49,107 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, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2023-12-02 08:19:49,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:19:49,109 INFO L225 Difference]: With dead ends: 135 [2023-12-02 08:19:49,110 INFO L226 Difference]: Without dead ends: 124 [2023-12-02 08:19:49,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 08:19:49,111 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 54 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:19:49,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 74 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:19:49,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-12-02 08:19:49,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 112. [2023-12-02 08:19:49,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 86 states have (on average 1.4883720930232558) internal successors, (128), 103 states have internal predecessors, (128), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 08:19:49,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 140 transitions. [2023-12-02 08:19:49,129 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 140 transitions. Word has length 16 [2023-12-02 08:19:49,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:19:49,130 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 140 transitions. [2023-12-02 08:19:49,130 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, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 08:19:49,130 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 140 transitions. [2023-12-02 08:19:49,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 08:19:49,131 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:19:49,131 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:19:49,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 08:19:49,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:19:49,332 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:19:49,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:19:49,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1300360964, now seen corresponding path program 1 times [2023-12-02 08:19:49,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:19:49,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391388446] [2023-12-02 08:19:49,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:49,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:19:49,343 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:19:49,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [403010039] [2023-12-02 08:19:49,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:49,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:19:49,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:19:49,345 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:19:49,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 08:19:49,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:49,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 08:19:49,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:19:49,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 08:19:49,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:19:49,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 08:19:49,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:19:49,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391388446] [2023-12-02 08:19:49,883 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:19:49,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403010039] [2023-12-02 08:19:49,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403010039] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:19:49,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1882664241] [2023-12-02 08:19:49,903 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-12-02 08:19:49,903 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:19:49,906 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:19:49,912 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:19:49,912 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:19:50,374 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:19:50,431 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:19:51,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1882664241] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:19:51,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:19:51,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5, 5] total 16 [2023-12-02 08:19:51,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572705417] [2023-12-02 08:19:51,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:19:51,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 08:19:51,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:19:51,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 08:19:51,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-12-02 08:19:51,310 INFO L87 Difference]: Start difference. First operand 112 states and 140 transitions. Second operand has 11 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 08:19:51,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:19:51,604 INFO L93 Difference]: Finished difference Result 116 states and 142 transitions. [2023-12-02 08:19:51,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 08:19:51,604 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-12-02 08:19:51,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:19:51,606 INFO L225 Difference]: With dead ends: 116 [2023-12-02 08:19:51,606 INFO L226 Difference]: Without dead ends: 114 [2023-12-02 08:19:51,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-12-02 08:19:51,608 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 9 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 08:19:51,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 80 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 08:19:51,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-12-02 08:19:51,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2023-12-02 08:19:51,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 86 states have (on average 1.4651162790697674) internal successors, (126), 103 states have internal predecessors, (126), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 08:19:51,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2023-12-02 08:19:51,625 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 17 [2023-12-02 08:19:51,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:19:51,625 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2023-12-02 08:19:51,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 08:19:51,626 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2023-12-02 08:19:51,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 08:19:51,627 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:19:51,627 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 08:19:51,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 08:19:51,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:19:51,833 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:19:51,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:19:51,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1921517682, now seen corresponding path program 1 times [2023-12-02 08:19:51,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:19:51,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615297001] [2023-12-02 08:19:51,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:51,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:19:51,844 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:19:51,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1598987714] [2023-12-02 08:19:51,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:51,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:19:51,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:19:51,845 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:19:51,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 08:19:51,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:51,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 08:19:51,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:19:51,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 08:19:51,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:19:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 08:19:52,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:19:52,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615297001] [2023-12-02 08:19:52,011 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:19:52,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598987714] [2023-12-02 08:19:52,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598987714] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:19:52,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1841878227] [2023-12-02 08:19:52,014 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-12-02 08:19:52,015 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:19:52,015 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:19:52,016 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:19:52,016 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:19:52,443 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-12-02 08:19:52,452 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:19:52,496 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:19:53,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1841878227] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:19:53,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:19:53,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [4, 4] total 20 [2023-12-02 08:19:53,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45824635] [2023-12-02 08:19:53,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:19:53,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 08:19:53,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:19:53,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 08:19:53,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-12-02 08:19:53,819 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand has 16 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 08:19:54,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:19:54,264 INFO L93 Difference]: Finished difference Result 120 states and 145 transitions. [2023-12-02 08:19:54,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 08:19:54,265 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2023-12-02 08:19:54,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:19:54,266 INFO L225 Difference]: With dead ends: 120 [2023-12-02 08:19:54,266 INFO L226 Difference]: Without dead ends: 118 [2023-12-02 08:19:54,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-12-02 08:19:54,267 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 3 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 08:19:54,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 154 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 08:19:54,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-12-02 08:19:54,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2023-12-02 08:19:54,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 89 states have (on average 1.449438202247191) internal successors, (129), 106 states have internal predecessors, (129), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 08:19:54,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 141 transitions. [2023-12-02 08:19:54,281 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 141 transitions. Word has length 28 [2023-12-02 08:19:54,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:19:54,281 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 141 transitions. [2023-12-02 08:19:54,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 08:19:54,281 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 141 transitions. [2023-12-02 08:19:54,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 08:19:54,282 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:19:54,282 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 08:19:54,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 08:19:54,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:19:54,483 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:19:54,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:19:54,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1921825522, now seen corresponding path program 1 times [2023-12-02 08:19:54,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:19:54,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525663201] [2023-12-02 08:19:54,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:54,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:19:54,492 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:19:54,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541543600] [2023-12-02 08:19:54,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:54,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:19:54,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:19:54,493 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:19:54,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 08:19:54,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:54,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 08:19:54,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:19:54,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 08:19:54,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:19:54,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 08:19:54,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:19:54,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525663201] [2023-12-02 08:19:54,632 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:19:54,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541543600] [2023-12-02 08:19:54,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541543600] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:19:54,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1884320590] [2023-12-02 08:19:54,635 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-12-02 08:19:54,635 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:19:54,635 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:19:54,635 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:19:54,636 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:19:54,896 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-12-02 08:19:54,901 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:19:54,923 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:19:55,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1884320590] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:19:55,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:19:55,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [4, 4] total 20 [2023-12-02 08:19:55,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321675925] [2023-12-02 08:19:55,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:19:55,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 08:19:55,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:19:55,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 08:19:55,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-12-02 08:19:55,964 INFO L87 Difference]: Start difference. First operand 116 states and 141 transitions. Second operand has 16 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 08:19:56,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:19:56,382 INFO L93 Difference]: Finished difference Result 122 states and 147 transitions. [2023-12-02 08:19:56,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 08:19:56,382 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2023-12-02 08:19:56,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:19:56,384 INFO L225 Difference]: With dead ends: 122 [2023-12-02 08:19:56,384 INFO L226 Difference]: Without dead ends: 120 [2023-12-02 08:19:56,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-12-02 08:19:56,385 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 5 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 08:19:56,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 141 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 08:19:56,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-12-02 08:19:56,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2023-12-02 08:19:56,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 93 states have (on average 1.4301075268817205) internal successors, (133), 110 states have internal predecessors, (133), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 08:19:56,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 145 transitions. [2023-12-02 08:19:56,393 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 145 transitions. Word has length 28 [2023-12-02 08:19:56,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:19:56,393 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 145 transitions. [2023-12-02 08:19:56,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 08:19:56,393 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 145 transitions. [2023-12-02 08:19:56,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 08:19:56,394 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:19:56,394 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:19:56,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 08:19:56,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:19:56,595 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:19:56,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:19:56,595 INFO L85 PathProgramCache]: Analyzing trace with hash -609053680, now seen corresponding path program 1 times [2023-12-02 08:19:56,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:19:56,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550418096] [2023-12-02 08:19:56,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:56,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:19:56,601 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:19:56,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [494042288] [2023-12-02 08:19:56,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:56,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:19:56,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:19:56,603 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:19:56,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 08:19:56,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:56,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 08:19:56,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:19:56,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 08:19:56,688 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:19:56,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:19:56,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550418096] [2023-12-02 08:19:56,688 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:19:56,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494042288] [2023-12-02 08:19:56,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494042288] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:19:56,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:19:56,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 08:19:56,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475096228] [2023-12-02 08:19:56,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:19:56,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 08:19:56,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:19:56,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 08:19:56,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 08:19:56,690 INFO L87 Difference]: Start difference. First operand 120 states and 145 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 08:19:56,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:19:56,738 INFO L93 Difference]: Finished difference Result 120 states and 145 transitions. [2023-12-02 08:19:56,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 08:19:56,738 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-12-02 08:19:56,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:19:56,739 INFO L225 Difference]: With dead ends: 120 [2023-12-02 08:19:56,739 INFO L226 Difference]: Without dead ends: 119 [2023-12-02 08:19:56,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-12-02 08:19:56,740 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 62 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 08:19:56,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 139 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 08:19:56,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-12-02 08:19:56,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2023-12-02 08:19:56,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 93 states have (on average 1.3978494623655915) internal successors, (130), 109 states have internal predecessors, (130), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 08:19:56,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 142 transitions. [2023-12-02 08:19:56,747 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 142 transitions. Word has length 31 [2023-12-02 08:19:56,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:19:56,747 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 142 transitions. [2023-12-02 08:19:56,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 08:19:56,747 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 142 transitions. [2023-12-02 08:19:56,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 08:19:56,748 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:19:56,748 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 08:19:56,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 08:19:56,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:19:56,949 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:19:56,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:19:56,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1700794852, now seen corresponding path program 1 times [2023-12-02 08:19:56,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:19:56,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015513507] [2023-12-02 08:19:56,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:56,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:19:56,955 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:19:56,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1899185010] [2023-12-02 08:19:56,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:56,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:19:56,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:19:56,957 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:19:56,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 08:19:56,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:56,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 08:19:56,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:19:57,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 08:19:57,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:19:57,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 08:19:57,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:19:57,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015513507] [2023-12-02 08:19:57,107 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:19:57,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899185010] [2023-12-02 08:19:57,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899185010] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:19:57,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1507269997] [2023-12-02 08:19:57,110 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-12-02 08:19:57,110 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:19:57,111 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:19:57,111 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:19:57,111 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:19:58,455 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-12-02 08:19:58,464 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:19:58,489 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:20:00,142 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3029#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 ~counter~0) (<= 2147483647 |ULTIMATE.start_main_#t~post6#1|) (= |ULTIMATE.start_main_~y1~0#1| 0) (<= 0 (+ 2147483647 |ULTIMATE.start_main_~y3~0#1|)) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-12-02 08:20:00,142 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:20:00,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:20:00,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2023-12-02 08:20:00,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582067543] [2023-12-02 08:20:00,143 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:20:00,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 08:20:00,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:20:00,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 08:20:00,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2023-12-02 08:20:00,144 INFO L87 Difference]: Start difference. First operand 119 states and 142 transitions. Second operand has 10 states, 9 states have (on average 5.555555555555555) internal successors, (50), 10 states have internal predecessors, (50), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-02 08:20:00,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:20:00,285 INFO L93 Difference]: Finished difference Result 289 states and 345 transitions. [2023-12-02 08:20:00,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 08:20:00,286 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.555555555555555) internal successors, (50), 10 states have internal predecessors, (50), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 32 [2023-12-02 08:20:00,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:20:00,288 INFO L225 Difference]: With dead ends: 289 [2023-12-02 08:20:00,288 INFO L226 Difference]: Without dead ends: 279 [2023-12-02 08:20:00,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=209, Invalid=1197, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 08:20:00,290 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 96 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 08:20:00,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 342 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 08:20:00,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2023-12-02 08:20:00,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 237. [2023-12-02 08:20:00,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 204 states have (on average 1.4313725490196079) internal successors, (292), 220 states have internal predecessors, (292), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-12-02 08:20:00,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 314 transitions. [2023-12-02 08:20:00,307 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 314 transitions. Word has length 32 [2023-12-02 08:20:00,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:20:00,308 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 314 transitions. [2023-12-02 08:20:00,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.555555555555555) internal successors, (50), 10 states have internal predecessors, (50), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-02 08:20:00,308 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 314 transitions. [2023-12-02 08:20:00,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-02 08:20:00,309 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:20:00,309 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:20:00,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 08:20:00,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:20:00,510 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:20:00,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:20:00,510 INFO L85 PathProgramCache]: Analyzing trace with hash -336096120, now seen corresponding path program 1 times [2023-12-02 08:20:00,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:20:00,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314476978] [2023-12-02 08:20:00,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:00,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:20:00,516 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:20:00,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2030102140] [2023-12-02 08:20:00,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:00,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:20:00,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:20:00,518 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:20:00,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 08:20:00,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:20:00,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 08:20:00,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:20:00,706 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 08:20:00,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:20:00,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:20:00,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314476978] [2023-12-02 08:20:00,855 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:20:00,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030102140] [2023-12-02 08:20:00,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030102140] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:20:00,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [686265233] [2023-12-02 08:20:00,857 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-12-02 08:20:00,858 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:20:00,858 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:20:00,858 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:20:00,859 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:20:01,759 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2023-12-02 08:20:01,768 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:20:01,789 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:20:03,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [686265233] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:20:03,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:20:03,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [5] total 26 [2023-12-02 08:20:03,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985065022] [2023-12-02 08:20:03,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:20:03,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-02 08:20:03,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:20:03,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-02 08:20:03,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2023-12-02 08:20:03,458 INFO L87 Difference]: Start difference. First operand 237 states and 314 transitions. Second operand has 23 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 08:20:05,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:20:05,242 INFO L93 Difference]: Finished difference Result 370 states and 483 transitions. [2023-12-02 08:20:05,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 08:20:05,242 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 34 [2023-12-02 08:20:05,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:20:05,244 INFO L225 Difference]: With dead ends: 370 [2023-12-02 08:20:05,244 INFO L226 Difference]: Without dead ends: 266 [2023-12-02 08:20:05,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=362, Invalid=1360, Unknown=0, NotChecked=0, Total=1722 [2023-12-02 08:20:05,246 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 100 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 08:20:05,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 122 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 08:20:05,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2023-12-02 08:20:05,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 218. [2023-12-02 08:20:05,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 185 states have (on average 1.3837837837837839) internal successors, (256), 201 states have internal predecessors, (256), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 08:20:05,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 276 transitions. [2023-12-02 08:20:05,264 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 276 transitions. Word has length 34 [2023-12-02 08:20:05,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:20:05,264 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 276 transitions. [2023-12-02 08:20:05,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 08:20:05,264 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 276 transitions. [2023-12-02 08:20:05,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 08:20:05,265 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:20:05,265 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:20:05,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 08:20:05,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:20:05,466 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:20:05,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:20:05,466 INFO L85 PathProgramCache]: Analyzing trace with hash -2068381735, now seen corresponding path program 1 times [2023-12-02 08:20:05,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:20:05,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475057612] [2023-12-02 08:20:05,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:05,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:20:05,474 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:20:05,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [597079142] [2023-12-02 08:20:05,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:05,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:20:05,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:20:05,475 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:20:05,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 08:20:05,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:20:05,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 08:20:05,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:20:05,589 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 08:20:05,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:20:05,670 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 08:20:05,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:20:05,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475057612] [2023-12-02 08:20:05,671 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:20:05,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597079142] [2023-12-02 08:20:05,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597079142] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:20:05,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [354305649] [2023-12-02 08:20:05,674 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-12-02 08:20:05,674 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:20:05,674 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:20:05,674 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:20:05,674 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:20:06,559 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-12-02 08:20:06,565 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:20:06,585 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:20:08,462 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4725#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 2147483648 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (= |ULTIMATE.start_main_~y1~0#1| 0) (<= 1 ~counter~0) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-12-02 08:20:08,462 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:20:08,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:20:08,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2023-12-02 08:20:08,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23099387] [2023-12-02 08:20:08,463 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:20:08,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 08:20:08,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:20:08,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 08:20:08,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2023-12-02 08:20:08,464 INFO L87 Difference]: Start difference. First operand 218 states and 276 transitions. Second operand has 9 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 08:20:08,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:20:08,769 INFO L93 Difference]: Finished difference Result 229 states and 285 transitions. [2023-12-02 08:20:08,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 08:20:08,769 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 37 [2023-12-02 08:20:08,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:20:08,771 INFO L225 Difference]: With dead ends: 229 [2023-12-02 08:20:08,771 INFO L226 Difference]: Without dead ends: 223 [2023-12-02 08:20:08,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 76 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=201, Invalid=1059, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 08:20:08,773 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 158 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 08:20:08,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 91 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 08:20:08,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2023-12-02 08:20:08,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 219. [2023-12-02 08:20:08,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 186 states have (on average 1.3602150537634408) internal successors, (253), 202 states have internal predecessors, (253), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 08:20:08,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 273 transitions. [2023-12-02 08:20:08,791 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 273 transitions. Word has length 37 [2023-12-02 08:20:08,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:20:08,791 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 273 transitions. [2023-12-02 08:20:08,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 08:20:08,792 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 273 transitions. [2023-12-02 08:20:08,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-02 08:20:08,792 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:20:08,793 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:20:08,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 08:20:08,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:20:08,993 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:20:08,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:20:08,993 INFO L85 PathProgramCache]: Analyzing trace with hash 304675714, now seen corresponding path program 1 times [2023-12-02 08:20:08,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:20:08,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501210645] [2023-12-02 08:20:08,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:08,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:20:09,000 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:20:09,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [46815665] [2023-12-02 08:20:09,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:09,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:20:09,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:20:09,001 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:20:09,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 08:20:09,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:20:09,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 08:20:09,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:20:09,081 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 08:20:09,081 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:20:09,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:20:09,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501210645] [2023-12-02 08:20:09,082 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:20:09,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46815665] [2023-12-02 08:20:09,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46815665] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:20:09,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:20:09,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 08:20:09,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158079618] [2023-12-02 08:20:09,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:20:09,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 08:20:09,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:20:09,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 08:20:09,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 08:20:09,083 INFO L87 Difference]: Start difference. First operand 219 states and 273 transitions. Second operand has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 08:20:09,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:20:09,198 INFO L93 Difference]: Finished difference Result 224 states and 274 transitions. [2023-12-02 08:20:09,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 08:20:09,199 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2023-12-02 08:20:09,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:20:09,200 INFO L225 Difference]: With dead ends: 224 [2023-12-02 08:20:09,201 INFO L226 Difference]: Without dead ends: 223 [2023-12-02 08:20:09,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 08:20:09,202 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 18 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:20:09,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 57 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:20:09,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2023-12-02 08:20:09,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 219. [2023-12-02 08:20:09,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 186 states have (on average 1.3387096774193548) internal successors, (249), 202 states have internal predecessors, (249), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 08:20:09,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 269 transitions. [2023-12-02 08:20:09,220 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 269 transitions. Word has length 38 [2023-12-02 08:20:09,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:20:09,220 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 269 transitions. [2023-12-02 08:20:09,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 08:20:09,221 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 269 transitions. [2023-12-02 08:20:09,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 08:20:09,221 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:20:09,222 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:20:09,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-02 08:20:09,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:20:09,428 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:20:09,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:20:09,428 INFO L85 PathProgramCache]: Analyzing trace with hash 855012603, now seen corresponding path program 1 times [2023-12-02 08:20:09,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:20:09,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587282354] [2023-12-02 08:20:09,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:09,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:20:09,433 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:20:09,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1164178456] [2023-12-02 08:20:09,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:09,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:20:09,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:20:09,435 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:20:09,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 08:20:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:20:09,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 08:20:09,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:20:09,509 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 08:20:09,509 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:20:09,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:20:09,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587282354] [2023-12-02 08:20:09,509 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:20:09,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164178456] [2023-12-02 08:20:09,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164178456] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:20:09,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:20:09,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 08:20:09,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9052807] [2023-12-02 08:20:09,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:20:09,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 08:20:09,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:20:09,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 08:20:09,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 08:20:09,511 INFO L87 Difference]: Start difference. First operand 219 states and 269 transitions. Second operand has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 08:20:09,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:20:09,655 INFO L93 Difference]: Finished difference Result 224 states and 270 transitions. [2023-12-02 08:20:09,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 08:20:09,656 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2023-12-02 08:20:09,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:20:09,658 INFO L225 Difference]: With dead ends: 224 [2023-12-02 08:20:09,658 INFO L226 Difference]: Without dead ends: 223 [2023-12-02 08:20:09,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 08:20:09,658 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 18 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:20:09,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 55 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:20:09,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2023-12-02 08:20:09,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 219. [2023-12-02 08:20:09,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 186 states have (on average 1.3172043010752688) internal successors, (245), 202 states have internal predecessors, (245), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 08:20:09,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 265 transitions. [2023-12-02 08:20:09,671 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 265 transitions. Word has length 39 [2023-12-02 08:20:09,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:20:09,671 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 265 transitions. [2023-12-02 08:20:09,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 08:20:09,671 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 265 transitions. [2023-12-02 08:20:09,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 08:20:09,672 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:20:09,672 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:20:09,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 08:20:09,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:20:09,872 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:20:09,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:20:09,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1074879932, now seen corresponding path program 1 times [2023-12-02 08:20:09,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:20:09,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601505051] [2023-12-02 08:20:09,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:09,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:20:09,880 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:20:09,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2049250594] [2023-12-02 08:20:09,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:09,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:20:09,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:20:09,881 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:20:09,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 08:20:09,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:20:09,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 08:20:09,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:20:09,958 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 08:20:09,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:20:10,005 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 08:20:10,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:20:10,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601505051] [2023-12-02 08:20:10,006 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:20:10,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049250594] [2023-12-02 08:20:10,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049250594] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:20:10,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1019740319] [2023-12-02 08:20:10,008 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-12-02 08:20:10,008 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:20:10,008 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:20:10,008 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:20:10,009 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:20:10,890 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-12-02 08:20:10,900 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:20:10,934 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:20:12,654 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6757#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (= 2147483647 |ULTIMATE.start_main_~y2~0#1|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (= |ULTIMATE.start_main_~y1~0#1| 0) (<= 1 ~counter~0) (not (= |ULTIMATE.start_main_~y3~0#1| 0)) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (= (+ 2147483647 |ULTIMATE.start_main_~y3~0#1|) |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-12-02 08:20:12,654 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:20:12,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:20:12,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-12-02 08:20:12,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063702042] [2023-12-02 08:20:12,654 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:20:12,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 08:20:12,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:20:12,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 08:20:12,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2023-12-02 08:20:12,655 INFO L87 Difference]: Start difference. First operand 219 states and 265 transitions. Second operand has 6 states, 5 states have (on average 13.4) internal successors, (67), 6 states have internal predecessors, (67), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 08:20:12,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:20:12,743 INFO L93 Difference]: Finished difference Result 344 states and 403 transitions. [2023-12-02 08:20:12,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 08:20:12,743 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.4) internal successors, (67), 6 states have internal predecessors, (67), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 45 [2023-12-02 08:20:12,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:20:12,746 INFO L225 Difference]: With dead ends: 344 [2023-12-02 08:20:12,746 INFO L226 Difference]: Without dead ends: 342 [2023-12-02 08:20:12,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2023-12-02 08:20:12,747 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 111 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:20:12,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 135 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:20:12,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2023-12-02 08:20:12,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 283. [2023-12-02 08:20:12,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 247 states have (on average 1.3157894736842106) internal successors, (325), 262 states have internal predecessors, (325), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-12-02 08:20:12,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 353 transitions. [2023-12-02 08:20:12,763 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 353 transitions. Word has length 45 [2023-12-02 08:20:12,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:20:12,763 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 353 transitions. [2023-12-02 08:20:12,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.4) internal successors, (67), 6 states have internal predecessors, (67), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 08:20:12,763 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 353 transitions. [2023-12-02 08:20:12,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-02 08:20:12,764 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:20:12,764 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:20:12,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 08:20:12,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 08:20:12,965 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:20:12,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:20:12,965 INFO L85 PathProgramCache]: Analyzing trace with hash -779004846, now seen corresponding path program 1 times [2023-12-02 08:20:12,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:20:12,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941031980] [2023-12-02 08:20:12,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:12,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:20:12,971 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:20:12,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1726731340] [2023-12-02 08:20:12,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:12,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:20:12,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:20:12,973 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:20:12,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 08:20:13,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:20:13,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 08:20:13,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:20:13,051 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 08:20:13,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:20:13,092 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 08:20:13,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:20:13,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941031980] [2023-12-02 08:20:13,092 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:20:13,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726731340] [2023-12-02 08:20:13,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726731340] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:20:13,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [754532547] [2023-12-02 08:20:13,094 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-12-02 08:20:13,094 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:20:13,094 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:20:13,094 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:20:13,094 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:20:13,930 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2023-12-02 08:20:13,937 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:20:13,957 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:20:15,687 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7761#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~x2~0#1| 1) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= 1 ~counter~0) (<= |ULTIMATE.start_main_~y3~0#1| 0) (not (= |ULTIMATE.start_main_~y3~0#1| 0)) (= 2147483647 |ULTIMATE.start_main_~y1~0#1|) (= (+ 2147483647 |ULTIMATE.start_main_~y3~0#1|) |ULTIMATE.start_main_~x1~0#1|))' at error location [2023-12-02 08:20:15,687 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:20:15,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:20:15,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-12-02 08:20:15,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733184558] [2023-12-02 08:20:15,688 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:20:15,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 08:20:15,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:20:15,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 08:20:15,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2023-12-02 08:20:15,689 INFO L87 Difference]: Start difference. First operand 283 states and 353 transitions. Second operand has 6 states, 5 states have (on average 14.6) internal successors, (73), 6 states have internal predecessors, (73), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 08:20:15,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:20:15,884 INFO L93 Difference]: Finished difference Result 699 states and 878 transitions. [2023-12-02 08:20:15,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 08:20:15,885 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.6) internal successors, (73), 6 states have internal predecessors, (73), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 48 [2023-12-02 08:20:15,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:20:15,889 INFO L225 Difference]: With dead ends: 699 [2023-12-02 08:20:15,889 INFO L226 Difference]: Without dead ends: 698 [2023-12-02 08:20:15,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 113 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2023-12-02 08:20:15,890 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 155 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 08:20:15,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 129 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 08:20:15,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2023-12-02 08:20:15,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 627. [2023-12-02 08:20:15,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 573 states have (on average 1.3577661431064572) internal successors, (778), 588 states have internal predecessors, (778), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2023-12-02 08:20:15,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 842 transitions. [2023-12-02 08:20:15,937 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 842 transitions. Word has length 48 [2023-12-02 08:20:15,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:20:15,938 INFO L495 AbstractCegarLoop]: Abstraction has 627 states and 842 transitions. [2023-12-02 08:20:15,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.6) internal successors, (73), 6 states have internal predecessors, (73), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 08:20:15,938 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 842 transitions. [2023-12-02 08:20:15,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-02 08:20:15,939 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:20:15,939 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:20:15,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-02 08:20:16,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 08:20:16,140 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:20:16,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:20:16,140 INFO L85 PathProgramCache]: Analyzing trace with hash 129195336, now seen corresponding path program 1 times [2023-12-02 08:20:16,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:20:16,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687610114] [2023-12-02 08:20:16,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:16,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:20:16,149 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:20:16,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [465215779] [2023-12-02 08:20:16,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:16,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:20:16,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:20:16,150 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:20:16,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 08:20:16,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:20:16,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 08:20:16,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:20:16,250 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 08:20:16,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:20:16,335 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 08:20:16,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:20:16,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687610114] [2023-12-02 08:20:16,336 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:20:16,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465215779] [2023-12-02 08:20:16,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465215779] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:20:16,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [648767890] [2023-12-02 08:20:16,338 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-12-02 08:20:16,338 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:20:16,338 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:20:16,339 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:20:16,339 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:20:17,236 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-12-02 08:20:17,241 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:20:17,263 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:20:19,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [648767890] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:20:19,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:20:19,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [5, 5] total 28 [2023-12-02 08:20:19,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691317953] [2023-12-02 08:20:19,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:20:19,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-02 08:20:19,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:20:19,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-02 08:20:19,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2023-12-02 08:20:19,068 INFO L87 Difference]: Start difference. First operand 627 states and 842 transitions. Second operand has 22 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 08:20:20,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:20:20,979 INFO L93 Difference]: Finished difference Result 639 states and 846 transitions. [2023-12-02 08:20:20,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 08:20:20,979 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 49 [2023-12-02 08:20:20,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:20:20,982 INFO L225 Difference]: With dead ends: 639 [2023-12-02 08:20:20,982 INFO L226 Difference]: Without dead ends: 630 [2023-12-02 08:20:20,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=371, Invalid=1521, Unknown=0, NotChecked=0, Total=1892 [2023-12-02 08:20:20,983 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 56 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 08:20:20,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 130 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 08:20:20,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2023-12-02 08:20:21,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 629. [2023-12-02 08:20:21,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 573 states have (on average 1.3350785340314135) internal successors, (765), 588 states have internal predecessors, (765), 32 states have call successors, (32), 8 states have call predecessors, (32), 8 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2023-12-02 08:20:21,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 829 transitions. [2023-12-02 08:20:21,015 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 829 transitions. Word has length 49 [2023-12-02 08:20:21,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:20:21,015 INFO L495 AbstractCegarLoop]: Abstraction has 629 states and 829 transitions. [2023-12-02 08:20:21,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 08:20:21,016 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 829 transitions. [2023-12-02 08:20:21,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-02 08:20:21,017 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:20:21,017 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:20:21,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 08:20:21,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 08:20:21,220 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:20:21,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:20:21,221 INFO L85 PathProgramCache]: Analyzing trace with hash 128887496, now seen corresponding path program 1 times [2023-12-02 08:20:21,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:20:21,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308300601] [2023-12-02 08:20:21,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:21,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:20:21,228 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:20:21,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1982208127] [2023-12-02 08:20:21,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:21,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:20:21,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:20:21,230 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:20:21,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 08:20:21,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:20:21,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 08:20:21,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:20:21,337 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 08:20:21,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:20:21,416 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 08:20:21,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:20:21,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308300601] [2023-12-02 08:20:21,416 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:20:21,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982208127] [2023-12-02 08:20:21,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982208127] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:20:21,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1156069331] [2023-12-02 08:20:21,418 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2023-12-02 08:20:21,418 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:20:21,419 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:20:21,419 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:20:21,419 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:20:22,222 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-12-02 08:20:22,227 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:20:22,247 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:20:23,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1156069331] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:20:23,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:20:23,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [5, 5] total 30 [2023-12-02 08:20:23,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746530743] [2023-12-02 08:20:23,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:20:23,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 08:20:23,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:20:23,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 08:20:23,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2023-12-02 08:20:23,900 INFO L87 Difference]: Start difference. First operand 629 states and 829 transitions. Second operand has 24 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 08:20:25,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:20:25,715 INFO L93 Difference]: Finished difference Result 632 states and 829 transitions. [2023-12-02 08:20:25,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 08:20:25,716 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 49 [2023-12-02 08:20:25,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:20:25,718 INFO L225 Difference]: With dead ends: 632 [2023-12-02 08:20:25,719 INFO L226 Difference]: Without dead ends: 630 [2023-12-02 08:20:25,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=414, Invalid=1748, Unknown=0, NotChecked=0, Total=2162 [2023-12-02 08:20:25,720 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 53 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 08:20:25,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 106 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 08:20:25,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2023-12-02 08:20:25,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 629. [2023-12-02 08:20:25,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 573 states have (on average 1.324607329842932) internal successors, (759), 588 states have internal predecessors, (759), 32 states have call successors, (32), 8 states have call predecessors, (32), 8 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2023-12-02 08:20:25,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 823 transitions. [2023-12-02 08:20:25,767 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 823 transitions. Word has length 49 [2023-12-02 08:20:25,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:20:25,768 INFO L495 AbstractCegarLoop]: Abstraction has 629 states and 823 transitions. [2023-12-02 08:20:25,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 08:20:25,768 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 823 transitions. [2023-12-02 08:20:25,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-02 08:20:25,769 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:20:25,769 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:20:25,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-02 08:20:25,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 08:20:25,969 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:20:25,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:20:25,970 INFO L85 PathProgramCache]: Analyzing trace with hash -761641293, now seen corresponding path program 1 times [2023-12-02 08:20:25,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:20:25,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976386022] [2023-12-02 08:20:25,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:25,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:20:25,975 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:20:25,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1907603412] [2023-12-02 08:20:25,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:25,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:20:25,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:20:25,976 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:20:25,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 08:20:26,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:20:26,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 08:20:26,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:20:26,079 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 08:20:26,079 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:20:26,155 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 08:20:26,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:20:26,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976386022] [2023-12-02 08:20:26,155 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:20:26,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907603412] [2023-12-02 08:20:26,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907603412] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:20:26,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1764485682] [2023-12-02 08:20:26,157 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2023-12-02 08:20:26,157 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:20:26,157 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:20:26,157 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:20:26,158 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:20:27,054 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:20:27,065 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:20:27,086 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:20:29,786 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13108#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 101 ~counter~0) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= (+ 2147483649 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)) 0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= ~counter~0 2147483647) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-12-02 08:20:29,786 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:20:29,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:20:29,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-12-02 08:20:29,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975494824] [2023-12-02 08:20:29,787 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:20:29,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 08:20:29,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:20:29,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 08:20:29,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1365, Unknown=0, NotChecked=0, Total=1560 [2023-12-02 08:20:29,789 INFO L87 Difference]: Start difference. First operand 629 states and 823 transitions. Second operand has 14 states, 14 states have (on average 6.428571428571429) internal successors, (90), 14 states have internal predecessors, (90), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-02 08:20:30,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:20:30,017 INFO L93 Difference]: Finished difference Result 975 states and 1250 transitions. [2023-12-02 08:20:30,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 08:20:30,018 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.428571428571429) internal successors, (90), 14 states have internal predecessors, (90), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 55 [2023-12-02 08:20:30,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:20:30,022 INFO L225 Difference]: With dead ends: 975 [2023-12-02 08:20:30,022 INFO L226 Difference]: Without dead ends: 965 [2023-12-02 08:20:30,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 120 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=349, Invalid=2201, Unknown=0, NotChecked=0, Total=2550 [2023-12-02 08:20:30,024 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 120 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:20:30,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 351 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:20:30,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2023-12-02 08:20:30,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 893. [2023-12-02 08:20:30,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 820 states have (on average 1.3195121951219513) internal successors, (1082), 835 states have internal predecessors, (1082), 42 states have call successors, (42), 15 states have call predecessors, (42), 15 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-12-02 08:20:30,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1166 transitions. [2023-12-02 08:20:30,111 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1166 transitions. Word has length 55 [2023-12-02 08:20:30,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:20:30,111 INFO L495 AbstractCegarLoop]: Abstraction has 893 states and 1166 transitions. [2023-12-02 08:20:30,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.428571428571429) internal successors, (90), 14 states have internal predecessors, (90), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-02 08:20:30,111 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1166 transitions. [2023-12-02 08:20:30,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-02 08:20:30,112 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:20:30,112 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:20:30,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-02 08:20:30,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:20:30,315 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:20:30,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:20:30,315 INFO L85 PathProgramCache]: Analyzing trace with hash -761641278, now seen corresponding path program 1 times [2023-12-02 08:20:30,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:20:30,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253120654] [2023-12-02 08:20:30,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:30,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:20:30,323 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:20:30,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [200885420] [2023-12-02 08:20:30,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:30,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:20:30,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:20:30,325 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:20:30,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-02 08:20:30,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:20:30,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 08:20:30,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:20:30,565 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 08:20:30,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:20:30,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:20:30,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253120654] [2023-12-02 08:20:30,663 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:20:30,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200885420] [2023-12-02 08:20:30,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200885420] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:20:30,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [425122555] [2023-12-02 08:20:30,665 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 08:20:30,665 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:20:30,666 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:20:30,666 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:20:30,666 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:20:31,584 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:20:31,592 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:20:31,612 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:20:35,238 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15457#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 4611686014132420609)) (<= 1 ~counter~0) (<= (+ 2147483649 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)) 0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= ~counter~0 100) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-12-02 08:20:35,238 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:20:35,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:20:35,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-12-02 08:20:35,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760246247] [2023-12-02 08:20:35,238 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 08:20:35,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 08:20:35,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:20:35,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 08:20:35,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 08:20:35,240 INFO L87 Difference]: Start difference. First operand 893 states and 1166 transitions. Second operand has 7 states, 6 states have (on average 7.5) internal successors, (45), 7 states have internal predecessors, (45), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 08:20:35,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:20:35,424 INFO L93 Difference]: Finished difference Result 899 states and 1167 transitions. [2023-12-02 08:20:35,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 08:20:35,425 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.5) internal successors, (45), 7 states have internal predecessors, (45), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 55 [2023-12-02 08:20:35,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:20:35,429 INFO L225 Difference]: With dead ends: 899 [2023-12-02 08:20:35,429 INFO L226 Difference]: Without dead ends: 896 [2023-12-02 08:20:35,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=239, Invalid=1167, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 08:20:35,431 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 78 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:20:35,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 120 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:20:35,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2023-12-02 08:20:35,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 889. [2023-12-02 08:20:35,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 819 states have (on average 1.2942612942612943) internal successors, (1060), 831 states have internal predecessors, (1060), 42 states have call successors, (42), 15 states have call predecessors, (42), 15 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-12-02 08:20:35,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1144 transitions. [2023-12-02 08:20:35,480 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1144 transitions. Word has length 55 [2023-12-02 08:20:35,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:20:35,487 INFO L495 AbstractCegarLoop]: Abstraction has 889 states and 1144 transitions. [2023-12-02 08:20:35,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.5) internal successors, (45), 7 states have internal predecessors, (45), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 08:20:35,487 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1144 transitions. [2023-12-02 08:20:35,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-12-02 08:20:35,488 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:20:35,488 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:20:35,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-02 08:20:35,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-12-02 08:20:35,689 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:20:35,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:20:35,689 INFO L85 PathProgramCache]: Analyzing trace with hash -2136043085, now seen corresponding path program 1 times [2023-12-02 08:20:35,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:20:35,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681598891] [2023-12-02 08:20:35,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:35,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:20:35,695 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:20:35,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1022625550] [2023-12-02 08:20:35,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:35,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:20:35,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:20:35,696 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:20:35,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-02 08:20:35,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:20:35,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 08:20:35,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:20:35,897 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 08:20:35,897 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:20:36,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:20:36,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681598891] [2023-12-02 08:20:36,093 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:20:36,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022625550] [2023-12-02 08:20:36,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022625550] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:20:36,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [23197725] [2023-12-02 08:20:36,095 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 08:20:36,095 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:20:36,095 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:20:36,096 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:20:36,096 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:20:36,967 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:20:36,976 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:20:36,996 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:20:39,526 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17710#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 1 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= ~counter~0 100) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 08:20:39,526 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:20:39,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:20:39,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-12-02 08:20:39,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376541957] [2023-12-02 08:20:39,527 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 08:20:39,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 08:20:39,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:20:39,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 08:20:39,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 08:20:39,528 INFO L87 Difference]: Start difference. First operand 889 states and 1144 transitions. Second operand has 7 states, 6 states have (on average 7.666666666666667) internal successors, (46), 7 states have internal predecessors, (46), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 08:20:39,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:20:39,705 INFO L93 Difference]: Finished difference Result 906 states and 1151 transitions. [2023-12-02 08:20:39,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 08:20:39,705 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.666666666666667) internal successors, (46), 7 states have internal predecessors, (46), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 56 [2023-12-02 08:20:39,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:20:39,710 INFO L225 Difference]: With dead ends: 906 [2023-12-02 08:20:39,710 INFO L226 Difference]: Without dead ends: 902 [2023-12-02 08:20:39,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 88 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=180, Invalid=1080, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 08:20:39,712 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 77 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:20:39,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 174 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:20:39,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2023-12-02 08:20:39,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 890. [2023-12-02 08:20:39,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 820 states have (on average 1.2707317073170732) internal successors, (1042), 832 states have internal predecessors, (1042), 42 states have call successors, (42), 15 states have call predecessors, (42), 15 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-12-02 08:20:39,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1126 transitions. [2023-12-02 08:20:39,757 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1126 transitions. Word has length 56 [2023-12-02 08:20:39,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:20:39,758 INFO L495 AbstractCegarLoop]: Abstraction has 890 states and 1126 transitions. [2023-12-02 08:20:39,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.666666666666667) internal successors, (46), 7 states have internal predecessors, (46), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 08:20:39,758 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1126 transitions. [2023-12-02 08:20:39,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-12-02 08:20:39,758 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:20:39,758 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:20:39,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-02 08:20:39,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-12-02 08:20:39,959 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:20:39,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:20:39,959 INFO L85 PathProgramCache]: Analyzing trace with hash -624033018, now seen corresponding path program 1 times [2023-12-02 08:20:39,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:20:39,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776059244] [2023-12-02 08:20:39,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:39,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:20:39,967 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:20:39,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1863163101] [2023-12-02 08:20:39,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:39,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:20:39,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:20:39,968 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:20:39,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-02 08:20:40,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:20:40,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 08:20:40,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:20:40,134 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 08:20:40,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:20:40,336 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 08:20:40,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:20:40,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776059244] [2023-12-02 08:20:40,336 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:20:40,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863163101] [2023-12-02 08:20:40,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863163101] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:20:40,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1957864662] [2023-12-02 08:20:40,338 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 08:20:40,338 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:20:40,338 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:20:40,338 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:20:40,338 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:20:41,098 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:20:41,106 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:20:41,126 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:20:43,279 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20107#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= (+ (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) |ULTIMATE.start_main_~y2~0#1|) 2147483647) (<= (+ 2147483649 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) |ULTIMATE.start_main_~y2~0#1| |ULTIMATE.start_main_~y3~0#1|) 0) (<= 1 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-12-02 08:20:43,279 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:20:43,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:20:43,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2023-12-02 08:20:43,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590050776] [2023-12-02 08:20:43,279 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:20:43,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 08:20:43,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:20:43,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 08:20:43,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1161, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 08:20:43,281 INFO L87 Difference]: Start difference. First operand 890 states and 1126 transitions. Second operand has 12 states, 10 states have (on average 4.9) internal successors, (49), 11 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 08:20:43,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:20:43,500 INFO L93 Difference]: Finished difference Result 892 states and 1127 transitions. [2023-12-02 08:20:43,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 08:20:43,501 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.9) internal successors, (49), 11 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 59 [2023-12-02 08:20:43,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:20:43,505 INFO L225 Difference]: With dead ends: 892 [2023-12-02 08:20:43,505 INFO L226 Difference]: Without dead ends: 889 [2023-12-02 08:20:43,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 130 SyntacticMatches, 10 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=210, Invalid=1430, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 08:20:43,507 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 151 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:20:43,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 58 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:20:43,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2023-12-02 08:20:43,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 887. [2023-12-02 08:20:43,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 820 states have (on average 1.2158536585365853) internal successors, (997), 829 states have internal predecessors, (997), 42 states have call successors, (42), 15 states have call predecessors, (42), 15 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-12-02 08:20:43,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1081 transitions. [2023-12-02 08:20:43,566 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1081 transitions. Word has length 59 [2023-12-02 08:20:43,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:20:43,566 INFO L495 AbstractCegarLoop]: Abstraction has 887 states and 1081 transitions. [2023-12-02 08:20:43,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.9) internal successors, (49), 11 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 08:20:43,566 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1081 transitions. [2023-12-02 08:20:43,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-02 08:20:43,566 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:20:43,567 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:20:43,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-12-02 08:20:43,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-12-02 08:20:43,767 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:20:43,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:20:43,767 INFO L85 PathProgramCache]: Analyzing trace with hash 2129812983, now seen corresponding path program 1 times [2023-12-02 08:20:43,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:20:43,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101902563] [2023-12-02 08:20:43,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:43,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:20:43,773 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:20:43,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [97707693] [2023-12-02 08:20:43,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:43,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:20:43,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:20:43,774 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:20:43,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-02 08:20:43,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:20:43,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 08:20:43,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:20:44,050 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 08:20:44,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:20:44,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:20:44,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101902563] [2023-12-02 08:20:44,137 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:20:44,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97707693] [2023-12-02 08:20:44,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97707693] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:20:44,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1017084365] [2023-12-02 08:20:44,138 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 08:20:44,138 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:20:44,138 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:20:44,138 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:20:44,139 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:20:44,893 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:20:44,901 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:20:44,926 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:20:47,216 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22380#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= 2147483648 (+ (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) |ULTIMATE.start_main_~y2~0#1| |ULTIMATE.start_main_~y3~0#1|)) (<= (+ (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) |ULTIMATE.start_main_~y2~0#1|) 2147483647) (<= 1 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-12-02 08:20:47,216 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:20:47,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:20:47,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2023-12-02 08:20:47,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065960246] [2023-12-02 08:20:47,216 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 08:20:47,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 08:20:47,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:20:47,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 08:20:47,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1221, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 08:20:47,218 INFO L87 Difference]: Start difference. First operand 887 states and 1081 transitions. Second operand has 9 states, 8 states have (on average 6.25) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 08:20:47,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:20:47,532 INFO L93 Difference]: Finished difference Result 888 states and 1081 transitions. [2023-12-02 08:20:47,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 08:20:47,533 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.25) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 60 [2023-12-02 08:20:47,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:20:47,537 INFO L225 Difference]: With dead ends: 888 [2023-12-02 08:20:47,537 INFO L226 Difference]: Without dead ends: 887 [2023-12-02 08:20:47,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=235, Invalid=1657, Unknown=0, NotChecked=0, Total=1892 [2023-12-02 08:20:47,538 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 93 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 08:20:47,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 152 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 08:20:47,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2023-12-02 08:20:47,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 887. [2023-12-02 08:20:47,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 820 states have (on average 1.2146341463414634) internal successors, (996), 829 states have internal predecessors, (996), 42 states have call successors, (42), 15 states have call predecessors, (42), 15 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-12-02 08:20:47,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1080 transitions. [2023-12-02 08:20:47,582 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1080 transitions. Word has length 60 [2023-12-02 08:20:47,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:20:47,582 INFO L495 AbstractCegarLoop]: Abstraction has 887 states and 1080 transitions. [2023-12-02 08:20:47,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.25) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 08:20:47,582 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1080 transitions. [2023-12-02 08:20:47,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-02 08:20:47,583 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:20:47,583 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:20:47,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-12-02 08:20:47,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-02 08:20:47,784 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:20:47,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:20:47,784 INFO L85 PathProgramCache]: Analyzing trace with hash 2023370136, now seen corresponding path program 1 times [2023-12-02 08:20:47,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:20:47,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69180649] [2023-12-02 08:20:47,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:47,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:20:47,792 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:20:47,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1930914288] [2023-12-02 08:20:47,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:47,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:20:47,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:20:47,793 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:20:47,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-02 08:20:47,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:20:47,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 08:20:47,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:20:47,929 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 08:20:47,929 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:20:47,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:20:47,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69180649] [2023-12-02 08:20:47,929 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:20:47,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930914288] [2023-12-02 08:20:47,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930914288] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:20:47,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:20:47,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 08:20:47,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143150666] [2023-12-02 08:20:47,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:20:47,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 08:20:47,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:20:47,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 08:20:47,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-02 08:20:47,931 INFO L87 Difference]: Start difference. First operand 887 states and 1080 transitions. Second operand has 6 states, 5 states have (on average 11.6) internal successors, (58), 6 states have internal predecessors, (58), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 08:20:48,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:20:48,050 INFO L93 Difference]: Finished difference Result 887 states and 1080 transitions. [2023-12-02 08:20:48,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 08:20:48,050 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.6) internal successors, (58), 6 states have internal predecessors, (58), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 71 [2023-12-02 08:20:48,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:20:48,055 INFO L225 Difference]: With dead ends: 887 [2023-12-02 08:20:48,055 INFO L226 Difference]: Without dead ends: 885 [2023-12-02 08:20:48,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-12-02 08:20:48,056 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 88 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 08:20:48,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 113 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 08:20:48,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2023-12-02 08:20:48,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 885. [2023-12-02 08:20:48,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 820 states have (on average 1.171951219512195) internal successors, (961), 827 states have internal predecessors, (961), 42 states have call successors, (42), 15 states have call predecessors, (42), 15 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-12-02 08:20:48,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1045 transitions. [2023-12-02 08:20:48,122 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1045 transitions. Word has length 71 [2023-12-02 08:20:48,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:20:48,122 INFO L495 AbstractCegarLoop]: Abstraction has 885 states and 1045 transitions. [2023-12-02 08:20:48,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.6) internal successors, (58), 6 states have internal predecessors, (58), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 08:20:48,122 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1045 transitions. [2023-12-02 08:20:48,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-02 08:20:48,123 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:20:48,123 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:20:48,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-12-02 08:20:48,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-12-02 08:20:48,324 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:20:48,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:20:48,324 INFO L85 PathProgramCache]: Analyzing trace with hash -23445449, now seen corresponding path program 2 times [2023-12-02 08:20:48,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:20:48,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031579082] [2023-12-02 08:20:48,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:48,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:20:48,330 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:20:48,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [353144687] [2023-12-02 08:20:48,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 08:20:48,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:20:48,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:20:48,331 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:20:48,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-02 08:20:48,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 08:20:48,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:20:48,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 08:20:48,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:20:48,421 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 44 proven. 8 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 08:20:48,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:20:49,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:20:49,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031579082] [2023-12-02 08:20:49,576 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:20:49,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353144687] [2023-12-02 08:20:49,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353144687] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:20:49,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1897245882] [2023-12-02 08:20:49,577 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 08:20:49,577 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:20:49,578 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:20:49,578 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:20:49,578 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:20:50,489 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:20:50,497 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:20:50,517 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:20:53,607 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26895#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 1 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= ~counter~0 100) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 08:20:53,607 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:20:53,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:20:53,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2023-12-02 08:20:53,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151874754] [2023-12-02 08:20:53,607 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 08:20:53,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 08:20:53,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:20:53,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 08:20:53,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=918, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 08:20:53,609 INFO L87 Difference]: Start difference. First operand 885 states and 1045 transitions. Second operand has 5 states, 4 states have (on average 12.75) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 08:20:53,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:20:53,714 INFO L93 Difference]: Finished difference Result 1289 states and 1554 transitions. [2023-12-02 08:20:53,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 08:20:53,714 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 12.75) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 77 [2023-12-02 08:20:53,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:20:53,718 INFO L225 Difference]: With dead ends: 1289 [2023-12-02 08:20:53,718 INFO L226 Difference]: Without dead ends: 953 [2023-12-02 08:20:53,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 132 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 08:20:53,720 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 43 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 08:20:53,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 91 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 08:20:53,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2023-12-02 08:20:53,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 933. [2023-12-02 08:20:53,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 865 states have (on average 1.1630057803468208) internal successors, (1006), 872 states have internal predecessors, (1006), 45 states have call successors, (45), 15 states have call predecessors, (45), 15 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2023-12-02 08:20:53,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 1096 transitions. [2023-12-02 08:20:53,768 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 1096 transitions. Word has length 77 [2023-12-02 08:20:53,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:20:53,768 INFO L495 AbstractCegarLoop]: Abstraction has 933 states and 1096 transitions. [2023-12-02 08:20:53,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 12.75) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 08:20:53,768 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 1096 transitions. [2023-12-02 08:20:53,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-12-02 08:20:53,770 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:20:53,770 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:20:53,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-12-02 08:20:53,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-02 08:20:53,972 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:20:53,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:20:53,972 INFO L85 PathProgramCache]: Analyzing trace with hash -2053928733, now seen corresponding path program 1 times [2023-12-02 08:20:53,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:20:53,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185855804] [2023-12-02 08:20:53,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:53,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:20:53,979 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:20:53,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [254303529] [2023-12-02 08:20:53,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:53,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:20:53,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:20:53,980 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:20:53,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-02 08:20:54,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:20:54,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 08:20:54,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:20:54,114 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 2 proven. 73 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 08:20:54,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:20:54,265 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 2 proven. 73 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 08:20:54,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:20:54,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185855804] [2023-12-02 08:20:54,265 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:20:54,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254303529] [2023-12-02 08:20:54,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254303529] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:20:54,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [171725348] [2023-12-02 08:20:54,267 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 08:20:54,267 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:20:54,267 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:20:54,267 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:20:54,267 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:20:55,009 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:20:55,017 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:20:55,037 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:20:57,274 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29889#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= 1 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (+ (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) |ULTIMATE.start_main_~y2~0#1|)))' at error location [2023-12-02 08:20:57,274 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:20:57,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:20:57,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-12-02 08:20:57,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637195143] [2023-12-02 08:20:57,275 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:20:57,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 08:20:57,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:20:57,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 08:20:57,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1245, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 08:20:57,277 INFO L87 Difference]: Start difference. First operand 933 states and 1096 transitions. Second operand has 13 states, 11 states have (on average 11.818181818181818) internal successors, (130), 13 states have internal predecessors, (130), 7 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 08:20:57,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:20:57,956 INFO L93 Difference]: Finished difference Result 1231 states and 1434 transitions. [2023-12-02 08:20:57,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-02 08:20:57,957 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 11.818181818181818) internal successors, (130), 13 states have internal predecessors, (130), 7 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 79 [2023-12-02 08:20:57,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:20:57,961 INFO L225 Difference]: With dead ends: 1231 [2023-12-02 08:20:57,961 INFO L226 Difference]: Without dead ends: 1225 [2023-12-02 08:20:57,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 192 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=369, Invalid=2387, Unknown=0, NotChecked=0, Total=2756 [2023-12-02 08:20:57,963 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 168 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 08:20:57,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 146 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 08:20:57,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2023-12-02 08:20:58,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1072. [2023-12-02 08:20:58,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 998 states have (on average 1.1593186372745492) internal successors, (1157), 1005 states have internal predecessors, (1157), 51 states have call successors, (51), 15 states have call predecessors, (51), 15 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2023-12-02 08:20:58,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1259 transitions. [2023-12-02 08:20:58,018 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1259 transitions. Word has length 79 [2023-12-02 08:20:58,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:20:58,019 INFO L495 AbstractCegarLoop]: Abstraction has 1072 states and 1259 transitions. [2023-12-02 08:20:58,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 11.818181818181818) internal successors, (130), 13 states have internal predecessors, (130), 7 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 08:20:58,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1259 transitions. [2023-12-02 08:20:58,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-02 08:20:58,019 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:20:58,020 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:20:58,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-12-02 08:20:58,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-02 08:20:58,220 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:20:58,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:20:58,220 INFO L85 PathProgramCache]: Analyzing trace with hash -652715087, now seen corresponding path program 2 times [2023-12-02 08:20:58,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:20:58,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559116238] [2023-12-02 08:20:58,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:58,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:20:58,226 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:20:58,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2246378] [2023-12-02 08:20:58,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 08:20:58,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:20:58,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:20:58,228 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:20:58,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-02 08:20:58,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 08:20:58,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:20:58,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 08:20:58,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:20:58,624 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-02 08:20:58,625 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:20:58,809 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-12-02 08:20:58,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:20:58,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559116238] [2023-12-02 08:20:58,809 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:20:58,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2246378] [2023-12-02 08:20:58,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2246378] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:20:58,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [487141397] [2023-12-02 08:20:58,811 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 08:20:58,811 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:20:58,811 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:20:58,811 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:20:58,811 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:20:59,550 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:20:59,558 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:20:59,578 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:21:02,195 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '33000#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= 2147483648 (+ (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) |ULTIMATE.start_main_~y2~0#1| |ULTIMATE.start_main_~y3~0#1|)) (<= (+ (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) |ULTIMATE.start_main_~y2~0#1|) 2147483647) (<= 1 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-12-02 08:21:02,195 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:21:02,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:21:02,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2023-12-02 08:21:02,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708588951] [2023-12-02 08:21:02,195 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:21:02,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 08:21:02,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:21:02,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 08:21:02,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1362, Unknown=0, NotChecked=0, Total=1560 [2023-12-02 08:21:02,197 INFO L87 Difference]: Start difference. First operand 1072 states and 1259 transitions. Second operand has 15 states, 12 states have (on average 6.583333333333333) internal successors, (79), 14 states have internal predecessors, (79), 2 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 08:21:02,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:21:02,690 INFO L93 Difference]: Finished difference Result 1074 states and 1259 transitions. [2023-12-02 08:21:02,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 08:21:02,690 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 6.583333333333333) internal successors, (79), 14 states have internal predecessors, (79), 2 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) Word has length 81 [2023-12-02 08:21:02,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:21:02,694 INFO L225 Difference]: With dead ends: 1074 [2023-12-02 08:21:02,694 INFO L226 Difference]: Without dead ends: 1073 [2023-12-02 08:21:02,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 193 SyntacticMatches, 10 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=294, Invalid=2058, Unknown=0, NotChecked=0, Total=2352 [2023-12-02 08:21:02,696 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 126 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 08:21:02,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 96 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 08:21:02,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2023-12-02 08:21:02,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 1071. [2023-12-02 08:21:02,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071 states, 998 states have (on average 1.1442885771543085) internal successors, (1142), 1004 states have internal predecessors, (1142), 51 states have call successors, (51), 15 states have call predecessors, (51), 15 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2023-12-02 08:21:02,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 1244 transitions. [2023-12-02 08:21:02,753 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 1244 transitions. Word has length 81 [2023-12-02 08:21:02,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:21:02,754 INFO L495 AbstractCegarLoop]: Abstraction has 1071 states and 1244 transitions. [2023-12-02 08:21:02,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 6.583333333333333) internal successors, (79), 14 states have internal predecessors, (79), 2 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 08:21:02,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 1244 transitions. [2023-12-02 08:21:02,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-12-02 08:21:02,755 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:21:02,755 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:21:02,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-12-02 08:21:02,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-02 08:21:02,956 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:21:02,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:21:02,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1650313321, now seen corresponding path program 3 times [2023-12-02 08:21:02,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:21:02,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967569162] [2023-12-02 08:21:02,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:21:02,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:21:02,964 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:21:02,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [253775646] [2023-12-02 08:21:02,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 08:21:02,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:21:02,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:21:02,965 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:21:02,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-02 08:21:03,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 08:21:03,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:21:03,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 08:21:03,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:21:03,211 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 08:21:03,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:21:03,303 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:21:03,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967569162] [2023-12-02 08:21:03,303 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:21:03,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253775646] [2023-12-02 08:21:03,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253775646] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:21:03,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [643966765] [2023-12-02 08:21:03,304 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 08:21:03,304 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:21:03,305 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:21:03,305 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:21:03,305 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:21:04,086 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:21:04,094 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:21:04,114 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:21:06,720 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35781#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 4611686014132420609)) (<= 1 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= ~counter~0 100) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 08:21:06,720 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:21:06,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:21:06,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-12-02 08:21:06,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080075466] [2023-12-02 08:21:06,721 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 08:21:06,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 08:21:06,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:21:06,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 08:21:06,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2023-12-02 08:21:06,722 INFO L87 Difference]: Start difference. First operand 1071 states and 1244 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 7 states have internal predecessors, (69), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 08:21:06,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:21:06,955 INFO L93 Difference]: Finished difference Result 1241 states and 1450 transitions. [2023-12-02 08:21:06,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 08:21:06,956 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 7 states have internal predecessors, (69), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 98 [2023-12-02 08:21:06,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:21:06,962 INFO L225 Difference]: With dead ends: 1241 [2023-12-02 08:21:06,962 INFO L226 Difference]: Without dead ends: 1237 [2023-12-02 08:21:06,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 169 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 08:21:06,963 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 38 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 08:21:06,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 196 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 08:21:06,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2023-12-02 08:21:07,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 1215. [2023-12-02 08:21:07,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1135 states have (on average 1.1444933920704845) internal successors, (1299), 1141 states have internal predecessors, (1299), 58 states have call successors, (58), 15 states have call predecessors, (58), 15 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2023-12-02 08:21:07,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 1415 transitions. [2023-12-02 08:21:07,026 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 1415 transitions. Word has length 98 [2023-12-02 08:21:07,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:21:07,026 INFO L495 AbstractCegarLoop]: Abstraction has 1215 states and 1415 transitions. [2023-12-02 08:21:07,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 7 states have internal predecessors, (69), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 08:21:07,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 1415 transitions. [2023-12-02 08:21:07,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-12-02 08:21:07,027 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:21:07,027 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:21:07,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-12-02 08:21:07,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:21:07,228 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:21:07,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:21:07,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1751560202, now seen corresponding path program 2 times [2023-12-02 08:21:07,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:21:07,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967783602] [2023-12-02 08:21:07,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:21:07,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:21:07,234 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:21:07,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [752177559] [2023-12-02 08:21:07,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 08:21:07,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:21:07,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:21:07,236 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:21:07,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-02 08:21:07,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 08:21:07,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:21:07,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 08:21:07,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:21:07,372 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 08:21:07,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:21:07,477 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 08:21:07,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:21:07,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967783602] [2023-12-02 08:21:07,477 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:21:07,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752177559] [2023-12-02 08:21:07,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752177559] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:21:07,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1483920101] [2023-12-02 08:21:07,478 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-12-02 08:21:07,479 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:21:07,479 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:21:07,479 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:21:07,479 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:21:08,261 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-12-02 08:21:08,266 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:21:08,286 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:21:09,997 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '39196#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (= 2147483647 |ULTIMATE.start_main_~y2~0#1|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (= |ULTIMATE.start_main_~y1~0#1| 0) (<= 1 ~counter~0) (not (= |ULTIMATE.start_main_~y3~0#1| 0)) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (= (+ 2147483647 |ULTIMATE.start_main_~y3~0#1|) |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-12-02 08:21:09,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:21:09,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:21:09,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-12-02 08:21:09,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714852540] [2023-12-02 08:21:09,998 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:21:09,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 08:21:09,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:21:09,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 08:21:09,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 08:21:10,000 INFO L87 Difference]: Start difference. First operand 1215 states and 1415 transitions. Second operand has 12 states, 11 states have (on average 15.909090909090908) internal successors, (175), 12 states have internal predecessors, (175), 11 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-12-02 08:21:10,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:21:10,266 INFO L93 Difference]: Finished difference Result 2196 states and 2617 transitions. [2023-12-02 08:21:10,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 08:21:10,266 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 15.909090909090908) internal successors, (175), 12 states have internal predecessors, (175), 11 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 108 [2023-12-02 08:21:10,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:21:10,275 INFO L225 Difference]: With dead ends: 2196 [2023-12-02 08:21:10,276 INFO L226 Difference]: Without dead ends: 2195 [2023-12-02 08:21:10,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 286 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 08:21:10,277 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 368 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 08:21:10,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 223 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 08:21:10,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2195 states. [2023-12-02 08:21:10,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2195 to 1980. [2023-12-02 08:21:10,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1859 states have (on average 1.1845077998924152) internal successors, (2202), 1865 states have internal predecessors, (2202), 99 states have call successors, (99), 15 states have call predecessors, (99), 15 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2023-12-02 08:21:10,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 2400 transitions. [2023-12-02 08:21:10,383 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 2400 transitions. Word has length 108 [2023-12-02 08:21:10,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:21:10,383 INFO L495 AbstractCegarLoop]: Abstraction has 1980 states and 2400 transitions. [2023-12-02 08:21:10,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 15.909090909090908) internal successors, (175), 12 states have internal predecessors, (175), 11 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-12-02 08:21:10,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 2400 transitions. [2023-12-02 08:21:10,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-12-02 08:21:10,384 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:21:10,384 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:21:10,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-12-02 08:21:10,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-02 08:21:10,585 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:21:10,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:21:10,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1464397698, now seen corresponding path program 2 times [2023-12-02 08:21:10,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:21:10,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062786330] [2023-12-02 08:21:10,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:21:10,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:21:10,592 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:21:10,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [661587299] [2023-12-02 08:21:10,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 08:21:10,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:21:10,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:21:10,593 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:21:10,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-02 08:21:10,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 08:21:10,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:21:10,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 08:21:10,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:21:10,747 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 08:21:10,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:21:10,854 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 08:21:10,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:21:10,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062786330] [2023-12-02 08:21:10,854 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:21:10,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661587299] [2023-12-02 08:21:10,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661587299] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:21:10,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [891829098] [2023-12-02 08:21:10,856 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-12-02 08:21:10,856 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:21:10,856 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:21:10,856 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:21:10,856 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:21:11,620 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2023-12-02 08:21:11,627 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:21:11,646 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:21:13,720 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '44505#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~x2~0#1| 1) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= 1 ~counter~0) (<= |ULTIMATE.start_main_~y3~0#1| 0) (not (= |ULTIMATE.start_main_~y3~0#1| 0)) (= 2147483647 |ULTIMATE.start_main_~y1~0#1|) (= (+ 2147483647 |ULTIMATE.start_main_~y3~0#1|) |ULTIMATE.start_main_~x1~0#1|))' at error location [2023-12-02 08:21:13,720 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:21:13,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:21:13,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-12-02 08:21:13,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432009334] [2023-12-02 08:21:13,721 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:21:13,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 08:21:13,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:21:13,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 08:21:13,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2023-12-02 08:21:13,722 INFO L87 Difference]: Start difference. First operand 1980 states and 2400 transitions. Second operand has 12 states, 11 states have (on average 16.454545454545453) internal successors, (181), 12 states have internal predecessors, (181), 11 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-12-02 08:21:14,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:21:14,486 INFO L93 Difference]: Finished difference Result 3562 states and 4422 transitions. [2023-12-02 08:21:14,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 08:21:14,486 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 16.454545454545453) internal successors, (181), 12 states have internal predecessors, (181), 11 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 111 [2023-12-02 08:21:14,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:21:14,499 INFO L225 Difference]: With dead ends: 3562 [2023-12-02 08:21:14,499 INFO L226 Difference]: Without dead ends: 3561 [2023-12-02 08:21:14,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 290 SyntacticMatches, 9 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2023-12-02 08:21:14,501 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 483 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 08:21:14,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 225 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 08:21:14,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3561 states. [2023-12-02 08:21:14,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3561 to 3456. [2023-12-02 08:21:14,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3456 states, 3257 states have (on average 1.225053730426773) internal successors, (3990), 3263 states have internal predecessors, (3990), 177 states have call successors, (177), 15 states have call predecessors, (177), 15 states have return successors, (177), 177 states have call predecessors, (177), 177 states have call successors, (177) [2023-12-02 08:21:14,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3456 states to 3456 states and 4344 transitions. [2023-12-02 08:21:14,660 INFO L78 Accepts]: Start accepts. Automaton has 3456 states and 4344 transitions. Word has length 111 [2023-12-02 08:21:14,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:21:14,660 INFO L495 AbstractCegarLoop]: Abstraction has 3456 states and 4344 transitions. [2023-12-02 08:21:14,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 16.454545454545453) internal successors, (181), 12 states have internal predecessors, (181), 11 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-12-02 08:21:14,660 INFO L276 IsEmpty]: Start isEmpty. Operand 3456 states and 4344 transitions. [2023-12-02 08:21:14,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-12-02 08:21:14,661 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:21:14,661 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:21:14,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-12-02 08:21:14,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:21:14,862 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:21:14,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:21:14,862 INFO L85 PathProgramCache]: Analyzing trace with hash -137254237, now seen corresponding path program 4 times [2023-12-02 08:21:14,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:21:14,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446795509] [2023-12-02 08:21:14,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:21:14,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:21:14,870 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:21:14,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [386749613] [2023-12-02 08:21:14,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 08:21:14,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:21:14,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:21:14,871 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:21:14,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-02 08:21:14,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:21:14,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 08:21:14,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:21:15,056 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 83 proven. 113 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 08:21:15,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:21:15,163 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 83 proven. 113 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 08:21:15,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:21:15,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446795509] [2023-12-02 08:21:15,163 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:21:15,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386749613] [2023-12-02 08:21:15,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386749613] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:21:15,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [911699616] [2023-12-02 08:21:15,164 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 08:21:15,164 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:21:15,165 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:21:15,165 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:21:15,165 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:21:16,048 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:21:16,056 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:21:16,076 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:21:18,812 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '53015#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 1 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= ~counter~0 100) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 08:21:18,812 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:21:18,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:21:18,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2023-12-02 08:21:18,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565345430] [2023-12-02 08:21:18,813 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:21:18,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 08:21:18,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:21:18,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 08:21:18,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 08:21:18,814 INFO L87 Difference]: Start difference. First operand 3456 states and 4344 transitions. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-12-02 08:21:19,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:21:19,521 INFO L93 Difference]: Finished difference Result 7375 states and 9569 transitions. [2023-12-02 08:21:19,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 08:21:19,521 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 119 [2023-12-02 08:21:19,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:21:19,540 INFO L225 Difference]: With dead ends: 7375 [2023-12-02 08:21:19,541 INFO L226 Difference]: Without dead ends: 5247 [2023-12-02 08:21:19,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 307 SyntacticMatches, 15 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=180, Invalid=1226, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 08:21:19,545 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 130 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 08:21:19,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 408 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 08:21:19,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5247 states. [2023-12-02 08:21:19,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5247 to 3679. [2023-12-02 08:21:19,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3679 states, 3467 states have (on average 1.224689933660225) internal successors, (4246), 3473 states have internal predecessors, (4246), 190 states have call successors, (190), 15 states have call predecessors, (190), 15 states have return successors, (190), 190 states have call predecessors, (190), 190 states have call successors, (190) [2023-12-02 08:21:19,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3679 states to 3679 states and 4626 transitions. [2023-12-02 08:21:19,794 INFO L78 Accepts]: Start accepts. Automaton has 3679 states and 4626 transitions. Word has length 119 [2023-12-02 08:21:19,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:21:19,794 INFO L495 AbstractCegarLoop]: Abstraction has 3679 states and 4626 transitions. [2023-12-02 08:21:19,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-12-02 08:21:19,795 INFO L276 IsEmpty]: Start isEmpty. Operand 3679 states and 4626 transitions. [2023-12-02 08:21:19,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-12-02 08:21:19,796 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:21:19,796 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:21:19,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-12-02 08:21:19,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:21:19,997 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:21:19,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:21:19,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1333280, now seen corresponding path program 1 times [2023-12-02 08:21:19,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:21:19,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958661065] [2023-12-02 08:21:19,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:21:19,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:21:20,005 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:21:20,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [265848106] [2023-12-02 08:21:20,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:21:20,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:21:20,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:21:20,006 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:21:20,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-02 08:21:20,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:21:20,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 08:21:20,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:21:20,257 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 08:21:20,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:21:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 283 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 08:21:20,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:21:20,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958661065] [2023-12-02 08:21:20,532 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:21:20,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265848106] [2023-12-02 08:21:20,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265848106] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:21:20,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [88721060] [2023-12-02 08:21:20,533 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 08:21:20,533 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:21:20,533 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:21:20,533 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:21:20,533 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:21:21,300 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:21:21,309 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:21:21,329 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:21:23,902 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '66130#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 2147483647 |ULTIMATE.start_main_#t~post6#1|) (= ~counter~0 |ULTIMATE.start_main_#t~post6#1|) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-12-02 08:21:23,902 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:21:23,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:21:23,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 29 [2023-12-02 08:21:23,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734741690] [2023-12-02 08:21:23,902 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:21:23,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-02 08:21:23,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:21:23,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-02 08:21:23,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=2532, Unknown=0, NotChecked=0, Total=2970 [2023-12-02 08:21:23,905 INFO L87 Difference]: Start difference. First operand 3679 states and 4626 transitions. Second operand has 30 states, 29 states have (on average 8.10344827586207) internal successors, (235), 30 states have internal predecessors, (235), 14 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2023-12-02 08:21:24,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:21:24,809 INFO L93 Difference]: Finished difference Result 7775 states and 9601 transitions. [2023-12-02 08:21:24,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-12-02 08:21:24,810 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 8.10344827586207) internal successors, (235), 30 states have internal predecessors, (235), 14 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) Word has length 137 [2023-12-02 08:21:24,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:21:24,836 INFO L225 Difference]: With dead ends: 7775 [2023-12-02 08:21:24,837 INFO L226 Difference]: Without dead ends: 7771 [2023-12-02 08:21:24,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 343 SyntacticMatches, 13 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3024 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1248, Invalid=5394, Unknown=0, NotChecked=0, Total=6642 [2023-12-02 08:21:24,841 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 406 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:21:24,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 450 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:21:24,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7771 states. [2023-12-02 08:21:25,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7771 to 7617. [2023-12-02 08:21:25,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7617 states, 7194 states have (on average 1.1748679455101474) internal successors, (8452), 7200 states have internal predecessors, (8452), 379 states have call successors, (379), 37 states have call predecessors, (379), 37 states have return successors, (379), 379 states have call predecessors, (379), 379 states have call successors, (379) [2023-12-02 08:21:25,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7617 states to 7617 states and 9210 transitions. [2023-12-02 08:21:25,271 INFO L78 Accepts]: Start accepts. Automaton has 7617 states and 9210 transitions. Word has length 137 [2023-12-02 08:21:25,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:21:25,272 INFO L495 AbstractCegarLoop]: Abstraction has 7617 states and 9210 transitions. [2023-12-02 08:21:25,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 8.10344827586207) internal successors, (235), 30 states have internal predecessors, (235), 14 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2023-12-02 08:21:25,272 INFO L276 IsEmpty]: Start isEmpty. Operand 7617 states and 9210 transitions. [2023-12-02 08:21:25,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-12-02 08:21:25,274 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:21:25,274 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:21:25,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-12-02 08:21:25,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-12-02 08:21:25,475 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:21:25,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:21:25,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1094146429, now seen corresponding path program 5 times [2023-12-02 08:21:25,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:21:25,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803096635] [2023-12-02 08:21:25,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:21:25,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:21:25,487 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:21:25,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [705432078] [2023-12-02 08:21:25,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 08:21:25,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:21:25,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:21:25,488 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:21:25,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-12-02 08:21:25,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 08:21:25,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:21:25,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 08:21:25,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:21:25,806 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-12-02 08:21:25,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:21:25,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:21:25,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803096635] [2023-12-02 08:21:25,923 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:21:25,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705432078] [2023-12-02 08:21:25,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705432078] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:21:25,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1507406902] [2023-12-02 08:21:25,924 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 08:21:25,925 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:21:25,925 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:21:25,925 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:21:25,925 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:21:26,818 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:21:26,826 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:21:26,846 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:21:29,915 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '83775#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 4611686014132420609)) (<= 1 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= ~counter~0 100) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 08:21:29,915 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:21:29,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:21:29,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-12-02 08:21:29,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648880809] [2023-12-02 08:21:29,916 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 08:21:29,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 08:21:29,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:21:29,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 08:21:29,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 08:21:29,917 INFO L87 Difference]: Start difference. First operand 7617 states and 9210 transitions. Second operand has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 8 states have internal predecessors, (87), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 08:21:30,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:21:30,582 INFO L93 Difference]: Finished difference Result 10764 states and 13282 transitions. [2023-12-02 08:21:30,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 08:21:30,582 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 8 states have internal predecessors, (87), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 140 [2023-12-02 08:21:30,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:21:30,596 INFO L225 Difference]: With dead ends: 10764 [2023-12-02 08:21:30,596 INFO L226 Difference]: Without dead ends: 8101 [2023-12-02 08:21:30,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 247 SyntacticMatches, 13 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=200, Invalid=1606, Unknown=0, NotChecked=0, Total=1806 [2023-12-02 08:21:30,601 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 107 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 08:21:30,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 382 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 08:21:30,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8101 states. [2023-12-02 08:21:30,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8101 to 7216. [2023-12-02 08:21:31,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7216 states, 6813 states have (on average 1.1734918538088948) internal successors, (7995), 6819 states have internal predecessors, (7995), 359 states have call successors, (359), 37 states have call predecessors, (359), 37 states have return successors, (359), 359 states have call predecessors, (359), 359 states have call successors, (359) [2023-12-02 08:21:31,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7216 states to 7216 states and 8713 transitions. [2023-12-02 08:21:31,012 INFO L78 Accepts]: Start accepts. Automaton has 7216 states and 8713 transitions. Word has length 140 [2023-12-02 08:21:31,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:21:31,012 INFO L495 AbstractCegarLoop]: Abstraction has 7216 states and 8713 transitions. [2023-12-02 08:21:31,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 8 states have internal predecessors, (87), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 08:21:31,012 INFO L276 IsEmpty]: Start isEmpty. Operand 7216 states and 8713 transitions. [2023-12-02 08:21:31,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-12-02 08:21:31,014 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:21:31,014 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:21:31,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-12-02 08:21:31,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-12-02 08:21:31,215 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:21:31,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:21:31,215 INFO L85 PathProgramCache]: Analyzing trace with hash -2094122081, now seen corresponding path program 6 times [2023-12-02 08:21:31,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:21:31,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055847657] [2023-12-02 08:21:31,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:21:31,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:21:31,224 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:21:31,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [653837945] [2023-12-02 08:21:31,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 08:21:31,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:21:31,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:21:31,225 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:21:31,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-12-02 08:21:31,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 08:21:31,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:21:31,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 08:21:31,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:21:31,592 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-12-02 08:21:31,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:21:31,860 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-12-02 08:21:31,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:21:31,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055847657] [2023-12-02 08:21:31,860 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:21:31,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653837945] [2023-12-02 08:21:31,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653837945] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:21:31,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [496191721] [2023-12-02 08:21:31,862 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 08:21:31,862 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:21:31,862 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:21:31,862 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:21:31,862 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:21:32,670 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:21:32,678 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:21:32,698 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:21:36,114 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '104626#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 4611686014132420609)) (<= 1 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= ~counter~0 100) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 08:21:36,114 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:21:36,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:21:36,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-12-02 08:21:36,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235396385] [2023-12-02 08:21:36,114 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:21:36,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 08:21:36,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:21:36,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 08:21:36,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1312, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 08:21:36,115 INFO L87 Difference]: Start difference. First operand 7216 states and 8713 transitions. Second operand has 14 states, 13 states have (on average 13.923076923076923) internal successors, (181), 14 states have internal predecessors, (181), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-12-02 08:21:38,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:21:38,959 INFO L93 Difference]: Finished difference Result 9794 states and 11897 transitions. [2023-12-02 08:21:38,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 08:21:38,960 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 13.923076923076923) internal successors, (181), 14 states have internal predecessors, (181), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 140 [2023-12-02 08:21:38,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:21:38,975 INFO L225 Difference]: With dead ends: 9794 [2023-12-02 08:21:38,975 INFO L226 Difference]: Without dead ends: 9764 [2023-12-02 08:21:38,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 368 SyntacticMatches, 13 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=379, Invalid=2591, Unknown=0, NotChecked=0, Total=2970 [2023-12-02 08:21:38,978 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 361 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 08:21:38,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 563 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 08:21:38,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9764 states. [2023-12-02 08:21:39,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9764 to 9234. [2023-12-02 08:21:39,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9234 states, 8735 states have (on average 1.1291356611333716) internal successors, (9863), 8741 states have internal predecessors, (9863), 455 states have call successors, (455), 37 states have call predecessors, (455), 37 states have return successors, (455), 455 states have call predecessors, (455), 455 states have call successors, (455) [2023-12-02 08:21:39,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9234 states to 9234 states and 10773 transitions. [2023-12-02 08:21:39,453 INFO L78 Accepts]: Start accepts. Automaton has 9234 states and 10773 transitions. Word has length 140 [2023-12-02 08:21:39,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:21:39,453 INFO L495 AbstractCegarLoop]: Abstraction has 9234 states and 10773 transitions. [2023-12-02 08:21:39,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 13.923076923076923) internal successors, (181), 14 states have internal predecessors, (181), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-12-02 08:21:39,453 INFO L276 IsEmpty]: Start isEmpty. Operand 9234 states and 10773 transitions. [2023-12-02 08:21:39,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-12-02 08:21:39,456 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:21:39,456 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:21:39,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-12-02 08:21:39,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:21:39,657 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:21:39,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:21:39,657 INFO L85 PathProgramCache]: Analyzing trace with hash 108756257, now seen corresponding path program 1 times [2023-12-02 08:21:39,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:21:39,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19064230] [2023-12-02 08:21:39,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:21:39,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:21:39,667 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:21:39,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1317272108] [2023-12-02 08:21:39,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:21:39,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:21:39,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:21:39,668 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:21:39,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-12-02 08:21:39,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:21:39,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 08:21:39,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:21:39,951 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 0 proven. 445 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 08:21:39,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:21:40,293 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-12-02 08:21:40,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:21:40,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19064230] [2023-12-02 08:21:40,293 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:21:40,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317272108] [2023-12-02 08:21:40,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317272108] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:21:40,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [900726858] [2023-12-02 08:21:40,295 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2023-12-02 08:21:40,295 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:21:40,295 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:21:40,295 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:21:40,295 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:21:41,124 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:21:41,132 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:21:41,152 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:21:44,405 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '126805#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 101 ~counter~0) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 4611686014132420609)) (<= (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= ~counter~0 2147483647) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (+ (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) |ULTIMATE.start_main_~y2~0#1|)))' at error location [2023-12-02 08:21:44,405 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:21:44,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:21:44,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2023-12-02 08:21:44,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649300467] [2023-12-02 08:21:44,406 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:21:44,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-02 08:21:44,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:21:44,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-02 08:21:44,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=3268, Unknown=0, NotChecked=0, Total=3782 [2023-12-02 08:21:44,408 INFO L87 Difference]: Start difference. First operand 9234 states and 10773 transitions. Second operand has 34 states, 34 states have (on average 8.176470588235293) internal successors, (278), 34 states have internal predecessors, (278), 16 states have call successors, (18), 9 states have call predecessors, (18), 9 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2023-12-02 08:21:45,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:21:45,683 INFO L93 Difference]: Finished difference Result 12339 states and 14560 transitions. [2023-12-02 08:21:45,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-12-02 08:21:45,683 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 8.176470588235293) internal successors, (278), 34 states have internal predecessors, (278), 16 states have call successors, (18), 9 states have call predecessors, (18), 9 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) Word has length 163 [2023-12-02 08:21:45,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:21:45,702 INFO L225 Difference]: With dead ends: 12339 [2023-12-02 08:21:45,702 INFO L226 Difference]: Without dead ends: 12330 [2023-12-02 08:21:45,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 411 SyntacticMatches, 16 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3972 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1568, Invalid=6988, Unknown=0, NotChecked=0, Total=8556 [2023-12-02 08:21:45,705 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 348 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:21:45,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 500 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:21:45,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12330 states. [2023-12-02 08:21:46,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12330 to 12173. [2023-12-02 08:21:46,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12173 states, 11530 states have (on average 1.104163052905464) internal successors, (12731), 11536 states have internal predecessors, (12731), 595 states have call successors, (595), 41 states have call predecessors, (595), 41 states have return successors, (595), 595 states have call predecessors, (595), 595 states have call successors, (595) [2023-12-02 08:21:46,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12173 states to 12173 states and 13921 transitions. [2023-12-02 08:21:46,343 INFO L78 Accepts]: Start accepts. Automaton has 12173 states and 13921 transitions. Word has length 163 [2023-12-02 08:21:46,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:21:46,344 INFO L495 AbstractCegarLoop]: Abstraction has 12173 states and 13921 transitions. [2023-12-02 08:21:46,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 8.176470588235293) internal successors, (278), 34 states have internal predecessors, (278), 16 states have call successors, (18), 9 states have call predecessors, (18), 9 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2023-12-02 08:21:46,344 INFO L276 IsEmpty]: Start isEmpty. Operand 12173 states and 13921 transitions. [2023-12-02 08:21:46,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-12-02 08:21:46,347 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:21:46,347 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:21:46,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-12-02 08:21:46,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:21:46,547 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:21:46,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:21:46,548 INFO L85 PathProgramCache]: Analyzing trace with hash 109156451, now seen corresponding path program 2 times [2023-12-02 08:21:46,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:21:46,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189041012] [2023-12-02 08:21:46,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:21:46,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:21:46,556 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:21:46,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [26182292] [2023-12-02 08:21:46,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 08:21:46,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:21:46,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:21:46,558 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:21:46,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-12-02 08:21:46,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-12-02 08:21:46,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:21:46,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 08:21:46,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:21:46,878 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 6 proven. 431 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-12-02 08:21:46,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:21:47,227 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 6 proven. 431 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-12-02 08:21:47,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:21:47,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189041012] [2023-12-02 08:21:47,227 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:21:47,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26182292] [2023-12-02 08:21:47,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26182292] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:21:47,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [5505482] [2023-12-02 08:21:47,229 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 08:21:47,229 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:21:47,229 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:21:47,229 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:21:47,229 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:21:48,122 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:21:48,131 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:21:48,151 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:21:50,896 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '155075#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= 1 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (+ (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) |ULTIMATE.start_main_~y2~0#1|)))' at error location [2023-12-02 08:21:50,897 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:21:50,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:21:50,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2023-12-02 08:21:50,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452757342] [2023-12-02 08:21:50,897 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:21:50,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 08:21:50,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:21:50,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 08:21:50,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1819, Unknown=0, NotChecked=0, Total=2070 [2023-12-02 08:21:50,898 INFO L87 Difference]: Start difference. First operand 12173 states and 13921 transitions. Second operand has 21 states, 19 states have (on average 14.421052631578947) internal successors, (274), 21 states have internal predecessors, (274), 15 states have call successors, (16), 1 states have call predecessors, (16), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2023-12-02 08:21:52,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:21:52,584 INFO L93 Difference]: Finished difference Result 12265 states and 14007 transitions. [2023-12-02 08:21:52,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-12-02 08:21:52,585 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 14.421052631578947) internal successors, (274), 21 states have internal predecessors, (274), 15 states have call successors, (16), 1 states have call predecessors, (16), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) Word has length 163 [2023-12-02 08:21:52,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:21:52,599 INFO L225 Difference]: With dead ends: 12265 [2023-12-02 08:21:52,599 INFO L226 Difference]: Without dead ends: 12264 [2023-12-02 08:21:52,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 428 SyntacticMatches, 15 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2722 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1155, Invalid=5325, Unknown=0, NotChecked=0, Total=6480 [2023-12-02 08:21:52,603 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 368 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 08:21:52,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 152 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 08:21:52,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12264 states. [2023-12-02 08:21:53,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12264 to 12173. [2023-12-02 08:21:53,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12173 states, 11530 states have (on average 1.08326105810928) internal successors, (12490), 11536 states have internal predecessors, (12490), 595 states have call successors, (595), 41 states have call predecessors, (595), 41 states have return successors, (595), 595 states have call predecessors, (595), 595 states have call successors, (595) [2023-12-02 08:21:53,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12173 states to 12173 states and 13680 transitions. [2023-12-02 08:21:53,239 INFO L78 Accepts]: Start accepts. Automaton has 12173 states and 13680 transitions. Word has length 163 [2023-12-02 08:21:53,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:21:53,239 INFO L495 AbstractCegarLoop]: Abstraction has 12173 states and 13680 transitions. [2023-12-02 08:21:53,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 14.421052631578947) internal successors, (274), 21 states have internal predecessors, (274), 15 states have call successors, (16), 1 states have call predecessors, (16), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2023-12-02 08:21:53,240 INFO L276 IsEmpty]: Start isEmpty. Operand 12173 states and 13680 transitions. [2023-12-02 08:21:53,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-12-02 08:21:53,243 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:21:53,243 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:21:53,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-12-02 08:21:53,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:21:53,444 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:21:53,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:21:53,444 INFO L85 PathProgramCache]: Analyzing trace with hash 627951267, now seen corresponding path program 7 times [2023-12-02 08:21:53,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:21:53,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724655064] [2023-12-02 08:21:53,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:21:53,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:21:53,453 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:21:53,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [652367012] [2023-12-02 08:21:53,453 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 08:21:53,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:21:53,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:21:53,454 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:21:53,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-12-02 08:21:53,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:21:53,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 08:21:53,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:21:53,806 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 232 proven. 450 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-12-02 08:21:53,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:21:54,024 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 232 proven. 450 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-12-02 08:21:54,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:21:54,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724655064] [2023-12-02 08:21:54,024 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:21:54,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652367012] [2023-12-02 08:21:54,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652367012] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:21:54,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1431015455] [2023-12-02 08:21:54,026 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 08:21:54,026 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:21:54,026 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:21:54,026 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:21:54,026 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:21:54,792 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:21:54,800 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:21:54,819 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:21:58,196 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '183502#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 4611686014132420609)) (<= 1 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= ~counter~0 100) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 08:21:58,196 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:21:58,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:21:58,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2023-12-02 08:21:58,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531136394] [2023-12-02 08:21:58,197 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:21:58,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 08:21:58,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:21:58,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 08:21:58,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1451, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 08:21:58,199 INFO L87 Difference]: Start difference. First operand 12173 states and 13680 transitions. Second operand has 16 states, 16 states have (on average 15.1875) internal successors, (243), 16 states have internal predecessors, (243), 14 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2023-12-02 08:21:59,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:21:59,403 INFO L93 Difference]: Finished difference Result 19274 states and 22149 transitions. [2023-12-02 08:21:59,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 08:21:59,404 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 15.1875) internal successors, (243), 16 states have internal predecessors, (243), 14 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 203 [2023-12-02 08:21:59,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:21:59,417 INFO L225 Difference]: With dead ends: 19274 [2023-12-02 08:21:59,417 INFO L226 Difference]: Without dead ends: 15034 [2023-12-02 08:21:59,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 612 GetRequests, 543 SyntacticMatches, 25 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1422 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=239, Invalid=1831, Unknown=0, NotChecked=0, Total=2070 [2023-12-02 08:21:59,424 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 241 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 08:21:59,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 529 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 08:21:59,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15034 states. [2023-12-02 08:22:00,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15034 to 13178. [2023-12-02 08:22:00,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13178 states, 12479 states have (on average 1.0807757031813447) internal successors, (13487), 12485 states have internal predecessors, (13487), 651 states have call successors, (651), 41 states have call predecessors, (651), 41 states have return successors, (651), 651 states have call predecessors, (651), 651 states have call successors, (651) [2023-12-02 08:22:00,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13178 states to 13178 states and 14789 transitions. [2023-12-02 08:22:00,219 INFO L78 Accepts]: Start accepts. Automaton has 13178 states and 14789 transitions. Word has length 203 [2023-12-02 08:22:00,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:22:00,220 INFO L495 AbstractCegarLoop]: Abstraction has 13178 states and 14789 transitions. [2023-12-02 08:22:00,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 15.1875) internal successors, (243), 16 states have internal predecessors, (243), 14 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2023-12-02 08:22:00,220 INFO L276 IsEmpty]: Start isEmpty. Operand 13178 states and 14789 transitions. [2023-12-02 08:22:00,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2023-12-02 08:22:00,223 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:22:00,224 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:22:00,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-12-02 08:22:00,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-12-02 08:22:00,424 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:22:00,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:22:00,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1920680579, now seen corresponding path program 8 times [2023-12-02 08:22:00,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:22:00,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360263695] [2023-12-02 08:22:00,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:22:00,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:22:00,434 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:22:00,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1654272487] [2023-12-02 08:22:00,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 08:22:00,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:22:00,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:22:00,435 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:22:00,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-12-02 08:22:00,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-12-02 08:22:00,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:22:00,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 08:22:00,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:22:00,851 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 0 proven. 677 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2023-12-02 08:22:00,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:22:01,192 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 0 proven. 677 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2023-12-02 08:22:01,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:22:01,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360263695] [2023-12-02 08:22:01,193 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:22:01,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654272487] [2023-12-02 08:22:01,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654272487] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:22:01,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1808189967] [2023-12-02 08:22:01,194 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 08:22:01,194 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:22:01,194 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:22:01,194 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:22:01,194 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:22:02,012 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:22:02,020 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:22:02,040 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:22:05,964 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '220859#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 1 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= ~counter~0 100) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 08:22:05,964 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:22:05,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:22:05,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2023-12-02 08:22:05,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232225906] [2023-12-02 08:22:05,965 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:22:05,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 08:22:05,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:22:05,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 08:22:05,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1617, Unknown=0, NotChecked=0, Total=1806 [2023-12-02 08:22:05,966 INFO L87 Difference]: Start difference. First operand 13178 states and 14789 transitions. Second operand has 18 states, 17 states have (on average 14.294117647058824) internal successors, (243), 18 states have internal predecessors, (243), 13 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2023-12-02 08:22:09,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:22:09,716 INFO L93 Difference]: Finished difference Result 15333 states and 17205 transitions. [2023-12-02 08:22:09,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-12-02 08:22:09,717 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 14.294117647058824) internal successors, (243), 18 states have internal predecessors, (243), 13 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 224 [2023-12-02 08:22:09,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:22:09,729 INFO L225 Difference]: With dead ends: 15333 [2023-12-02 08:22:09,729 INFO L226 Difference]: Without dead ends: 15305 [2023-12-02 08:22:09,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 718 GetRequests, 608 SyntacticMatches, 21 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3118 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1129, Invalid=7061, Unknown=0, NotChecked=0, Total=8190 [2023-12-02 08:22:09,732 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 626 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 1780 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 901 SdHoareTripleChecker+Invalid, 1871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-02 08:22:09,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [628 Valid, 901 Invalid, 1871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1780 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-02 08:22:09,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15305 states. [2023-12-02 08:22:10,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15305 to 14145. [2023-12-02 08:22:10,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14145 states, 13399 states have (on average 1.0829166355698185) internal successors, (14510), 13405 states have internal predecessors, (14510), 698 states have call successors, (698), 41 states have call predecessors, (698), 41 states have return successors, (698), 698 states have call predecessors, (698), 698 states have call successors, (698) [2023-12-02 08:22:10,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14145 states to 14145 states and 15906 transitions. [2023-12-02 08:22:10,542 INFO L78 Accepts]: Start accepts. Automaton has 14145 states and 15906 transitions. Word has length 224 [2023-12-02 08:22:10,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:22:10,543 INFO L495 AbstractCegarLoop]: Abstraction has 14145 states and 15906 transitions. [2023-12-02 08:22:10,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 14.294117647058824) internal successors, (243), 18 states have internal predecessors, (243), 13 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2023-12-02 08:22:10,543 INFO L276 IsEmpty]: Start isEmpty. Operand 14145 states and 15906 transitions. [2023-12-02 08:22:10,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2023-12-02 08:22:10,548 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:22:10,549 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:22:10,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-12-02 08:22:10,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-12-02 08:22:10,749 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:22:10,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:22:10,750 INFO L85 PathProgramCache]: Analyzing trace with hash -931370806, now seen corresponding path program 3 times [2023-12-02 08:22:10,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:22:10,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542665402] [2023-12-02 08:22:10,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:22:10,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:22:10,793 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:22:10,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [795563068] [2023-12-02 08:22:10,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 08:22:10,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:22:10,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:22:10,794 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:22:10,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-12-02 08:22:10,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 08:22:10,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:22:10,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 08:22:10,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:22:11,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 995 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-02 08:22:11,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:22:11,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 995 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-02 08:22:11,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:22:11,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542665402] [2023-12-02 08:22:11,489 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:22:11,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795563068] [2023-12-02 08:22:11,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795563068] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:22:11,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1299003374] [2023-12-02 08:22:11,490 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-12-02 08:22:11,490 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:22:11,491 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:22:11,491 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:22:11,491 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:22:12,384 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-12-02 08:22:12,392 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:22:12,424 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:22:14,768 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '255061#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (= 2147483647 |ULTIMATE.start_main_~y2~0#1|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (= |ULTIMATE.start_main_~y1~0#1| 0) (<= 1 ~counter~0) (not (= |ULTIMATE.start_main_~y3~0#1| 0)) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (= (+ 2147483647 |ULTIMATE.start_main_~y3~0#1|) |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-12-02 08:22:14,768 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:22:14,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:22:14,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2023-12-02 08:22:14,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186391816] [2023-12-02 08:22:14,768 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:22:14,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 08:22:14,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:22:14,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 08:22:14,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1609, Unknown=0, NotChecked=0, Total=1980 [2023-12-02 08:22:14,770 INFO L87 Difference]: Start difference. First operand 14145 states and 15906 transitions. Second operand has 24 states, 23 states have (on average 17.0) internal successors, (391), 24 states have internal predecessors, (391), 23 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2023-12-02 08:22:16,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:22:16,177 INFO L93 Difference]: Finished difference Result 19989 states and 23184 transitions. [2023-12-02 08:22:16,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 08:22:16,177 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 17.0) internal successors, (391), 24 states have internal predecessors, (391), 23 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) Word has length 234 [2023-12-02 08:22:16,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:22:16,195 INFO L225 Difference]: With dead ends: 19989 [2023-12-02 08:22:16,195 INFO L226 Difference]: Without dead ends: 19988 [2023-12-02 08:22:16,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 700 GetRequests, 646 SyntacticMatches, 11 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1215 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=371, Invalid=1609, Unknown=0, NotChecked=0, Total=1980 [2023-12-02 08:22:16,199 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 566 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 08:22:16,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [566 Valid, 394 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 08:22:16,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19988 states. [2023-12-02 08:22:17,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19988 to 18979. [2023-12-02 08:22:17,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18979 states, 17978 states have (on average 1.1164200689731894) internal successors, (20071), 17984 states have internal predecessors, (20071), 953 states have call successors, (953), 41 states have call predecessors, (953), 41 states have return successors, (953), 953 states have call predecessors, (953), 953 states have call successors, (953) [2023-12-02 08:22:17,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18979 states to 18979 states and 21977 transitions. [2023-12-02 08:22:17,377 INFO L78 Accepts]: Start accepts. Automaton has 18979 states and 21977 transitions. Word has length 234 [2023-12-02 08:22:17,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:22:17,377 INFO L495 AbstractCegarLoop]: Abstraction has 18979 states and 21977 transitions. [2023-12-02 08:22:17,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 17.0) internal successors, (391), 24 states have internal predecessors, (391), 23 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2023-12-02 08:22:17,378 INFO L276 IsEmpty]: Start isEmpty. Operand 18979 states and 21977 transitions. [2023-12-02 08:22:17,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2023-12-02 08:22:17,383 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:22:17,383 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:22:17,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-12-02 08:22:17,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-12-02 08:22:17,584 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:22:17,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:22:17,584 INFO L85 PathProgramCache]: Analyzing trace with hash -321104510, now seen corresponding path program 3 times [2023-12-02 08:22:17,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:22:17,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630010451] [2023-12-02 08:22:17,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:22:17,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:22:17,595 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:22:17,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [954488361] [2023-12-02 08:22:17,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 08:22:17,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:22:17,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:22:17,596 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:22:17,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-12-02 08:22:17,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 08:22:17,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:22:17,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 08:22:17,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:22:17,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1137 backedges. 0 proven. 1025 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-02 08:22:17,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:22:18,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1137 backedges. 0 proven. 1025 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-02 08:22:18,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:22:18,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630010451] [2023-12-02 08:22:18,292 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:22:18,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954488361] [2023-12-02 08:22:18,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954488361] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:22:18,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [939777823] [2023-12-02 08:22:18,293 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-12-02 08:22:18,293 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:22:18,293 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:22:18,294 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:22:18,294 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:22:19,109 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2023-12-02 08:22:19,117 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:22:19,136 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:22:22,307 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '299588#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~x2~0#1| 1) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= 1 ~counter~0) (<= |ULTIMATE.start_main_~y3~0#1| 0) (not (= |ULTIMATE.start_main_~y3~0#1| 0)) (= 2147483647 |ULTIMATE.start_main_~y1~0#1|) (= (+ 2147483647 |ULTIMATE.start_main_~y3~0#1|) |ULTIMATE.start_main_~x1~0#1|))' at error location [2023-12-02 08:22:22,307 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:22:22,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:22:22,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2023-12-02 08:22:22,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402550007] [2023-12-02 08:22:22,308 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:22:22,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 08:22:22,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:22:22,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 08:22:22,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1615, Unknown=0, NotChecked=0, Total=1980 [2023-12-02 08:22:22,311 INFO L87 Difference]: Start difference. First operand 18979 states and 21977 transitions. Second operand has 24 states, 23 states have (on average 17.26086956521739) internal successors, (397), 24 states have internal predecessors, (397), 23 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2023-12-02 08:22:25,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:22:25,063 INFO L93 Difference]: Finished difference Result 26419 states and 31067 transitions. [2023-12-02 08:22:25,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 08:22:25,064 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 17.26086956521739) internal successors, (397), 24 states have internal predecessors, (397), 23 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) Word has length 237 [2023-12-02 08:22:25,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:22:25,087 INFO L225 Difference]: With dead ends: 26419 [2023-12-02 08:22:25,088 INFO L226 Difference]: Without dead ends: 26418 [2023-12-02 08:22:25,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 709 GetRequests, 634 SyntacticMatches, 32 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2167 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=365, Invalid=1615, Unknown=0, NotChecked=0, Total=1980 [2023-12-02 08:22:25,092 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 687 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 08:22:25,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [687 Valid, 460 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 08:22:25,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26418 states. [2023-12-02 08:22:26,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26418 to 26169. [2023-12-02 08:22:26,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26169 states, 24790 states have (on average 1.1379991932230737) internal successors, (28211), 24796 states have internal predecessors, (28211), 1331 states have call successors, (1331), 41 states have call predecessors, (1331), 41 states have return successors, (1331), 1331 states have call predecessors, (1331), 1331 states have call successors, (1331) [2023-12-02 08:22:26,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26169 states to 26169 states and 30873 transitions. [2023-12-02 08:22:26,530 INFO L78 Accepts]: Start accepts. Automaton has 26169 states and 30873 transitions. Word has length 237 [2023-12-02 08:22:26,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:22:26,530 INFO L495 AbstractCegarLoop]: Abstraction has 26169 states and 30873 transitions. [2023-12-02 08:22:26,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 17.26086956521739) internal successors, (397), 24 states have internal predecessors, (397), 23 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2023-12-02 08:22:26,530 INFO L276 IsEmpty]: Start isEmpty. Operand 26169 states and 30873 transitions. [2023-12-02 08:22:26,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2023-12-02 08:22:26,547 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:22:26,547 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 11, 11, 11, 11, 11, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:22:26,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-12-02 08:22:26,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-12-02 08:22:26,747 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:22:26,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:22:26,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1881026269, now seen corresponding path program 9 times [2023-12-02 08:22:26,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:22:26,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92280619] [2023-12-02 08:22:26,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:22:26,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:22:26,761 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:22:26,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [203003802] [2023-12-02 08:22:26,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 08:22:26,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:22:26,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:22:26,762 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:22:26,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-12-02 08:22:26,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 08:22:26,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:22:26,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 08:22:26,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:22:27,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 991 proven. 661 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2023-12-02 08:22:27,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:22:27,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 367 proven. 1285 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2023-12-02 08:22:27,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:22:27,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92280619] [2023-12-02 08:22:27,644 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:22:27,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203003802] [2023-12-02 08:22:27,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203003802] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:22:27,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [988171860] [2023-12-02 08:22:27,646 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 08:22:27,646 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:22:27,646 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:22:27,646 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:22:27,646 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:22:28,368 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:22:28,376 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:22:28,433 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:22:32,134 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '359804#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 1 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= ~counter~0 100) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 08:22:32,134 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:22:32,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:22:32,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2023-12-02 08:22:32,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628161663] [2023-12-02 08:22:32,135 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:22:32,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 08:22:32,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:22:32,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 08:22:32,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1830, Unknown=0, NotChecked=0, Total=2070 [2023-12-02 08:22:32,137 INFO L87 Difference]: Start difference. First operand 26169 states and 30873 transitions. Second operand has 21 states, 21 states have (on average 17.238095238095237) internal successors, (362), 21 states have internal predecessors, (362), 20 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2023-12-02 08:22:36,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:22:36,052 INFO L93 Difference]: Finished difference Result 65139 states and 79611 transitions. [2023-12-02 08:22:36,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-12-02 08:22:36,053 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 17.238095238095237) internal successors, (362), 21 states have internal predecessors, (362), 20 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) Word has length 329 [2023-12-02 08:22:36,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:22:36,104 INFO L225 Difference]: With dead ends: 65139 [2023-12-02 08:22:36,104 INFO L226 Difference]: Without dead ends: 46335 [2023-12-02 08:22:36,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1012 GetRequests, 909 SyntacticMatches, 32 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2725 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=707, Invalid=4549, Unknown=0, NotChecked=0, Total=5256 [2023-12-02 08:22:36,124 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 513 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-02 08:22:36,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 766 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1130 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-02 08:22:36,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46335 states. [2023-12-02 08:22:37,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46335 to 20885. [2023-12-02 08:22:37,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20885 states, 19757 states have (on average 1.152452295388976) internal successors, (22769), 19763 states have internal predecessors, (22769), 1080 states have call successors, (1080), 41 states have call predecessors, (1080), 41 states have return successors, (1080), 1080 states have call predecessors, (1080), 1080 states have call successors, (1080) [2023-12-02 08:22:37,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20885 states to 20885 states and 24929 transitions. [2023-12-02 08:22:37,501 INFO L78 Accepts]: Start accepts. Automaton has 20885 states and 24929 transitions. Word has length 329 [2023-12-02 08:22:37,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:22:37,501 INFO L495 AbstractCegarLoop]: Abstraction has 20885 states and 24929 transitions. [2023-12-02 08:22:37,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 17.238095238095237) internal successors, (362), 21 states have internal predecessors, (362), 20 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2023-12-02 08:22:37,501 INFO L276 IsEmpty]: Start isEmpty. Operand 20885 states and 24929 transitions. [2023-12-02 08:22:37,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2023-12-02 08:22:37,508 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:22:37,508 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:22:37,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-12-02 08:22:37,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:22:37,709 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:22:37,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:22:37,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1851967379, now seen corresponding path program 10 times [2023-12-02 08:22:37,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:22:37,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763859052] [2023-12-02 08:22:37,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:22:37,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:22:37,722 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:22:37,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1775607688] [2023-12-02 08:22:37,722 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 08:22:37,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:22:37,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:22:37,723 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:22:37,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-12-02 08:22:37,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:22:37,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 08:22:37,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:22:38,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2097 backedges. 0 proven. 1689 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2023-12-02 08:22:38,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:22:38,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:22:38,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763859052] [2023-12-02 08:22:38,638 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:22:38,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775607688] [2023-12-02 08:22:38,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775607688] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:22:38,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [77768276] [2023-12-02 08:22:38,639 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 08:22:38,639 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:22:38,640 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:22:38,640 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:22:38,640 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:22:39,398 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:22:39,406 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:22:39,426 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:22:43,118 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '456093#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 1 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= ~counter~0 100) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 08:22:43,118 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:22:43,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:22:43,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-12-02 08:22:43,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991663710] [2023-12-02 08:22:43,119 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 08:22:43,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 08:22:43,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:22:43,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 08:22:43,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 08:22:43,120 INFO L87 Difference]: Start difference. First operand 20885 states and 24929 transitions. Second operand has 11 states, 10 states have (on average 15.6) internal successors, (156), 11 states have internal predecessors, (156), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-12-02 08:22:44,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:22:44,801 INFO L93 Difference]: Finished difference Result 22420 states and 26746 transitions. [2023-12-02 08:22:44,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 08:22:44,802 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 15.6) internal successors, (156), 11 states have internal predecessors, (156), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 329 [2023-12-02 08:22:44,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:22:44,827 INFO L225 Difference]: With dead ends: 22420 [2023-12-02 08:22:44,827 INFO L226 Difference]: Without dead ends: 22419 [2023-12-02 08:22:44,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 605 SyntacticMatches, 31 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1118 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=180, Invalid=1302, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 08:22:44,832 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 65 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 08:22:44,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 327 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 08:22:44,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22419 states. [2023-12-02 08:22:46,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22419 to 20887. [2023-12-02 08:22:46,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20887 states, 19759 states have (on average 1.152436864213776) internal successors, (22771), 19765 states have internal predecessors, (22771), 1080 states have call successors, (1080), 41 states have call predecessors, (1080), 41 states have return successors, (1080), 1080 states have call predecessors, (1080), 1080 states have call successors, (1080) [2023-12-02 08:22:46,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20887 states to 20887 states and 24931 transitions. [2023-12-02 08:22:46,048 INFO L78 Accepts]: Start accepts. Automaton has 20887 states and 24931 transitions. Word has length 329 [2023-12-02 08:22:46,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:22:46,049 INFO L495 AbstractCegarLoop]: Abstraction has 20887 states and 24931 transitions. [2023-12-02 08:22:46,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 15.6) internal successors, (156), 11 states have internal predecessors, (156), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-12-02 08:22:46,049 INFO L276 IsEmpty]: Start isEmpty. Operand 20887 states and 24931 transitions. [2023-12-02 08:22:46,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2023-12-02 08:22:46,059 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:22:46,060 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:22:46,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-12-02 08:22:46,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-12-02 08:22:46,260 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:22:46,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:22:46,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1512142691, now seen corresponding path program 3 times [2023-12-02 08:22:46,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:22:46,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909491302] [2023-12-02 08:22:46,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:22:46,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:22:46,275 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:22:46,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1694618870] [2023-12-02 08:22:46,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 08:22:46,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:22:46,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:22:46,276 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:22:46,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-12-02 08:22:46,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 08:22:46,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:22:46,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 56 conjunts are in the unsatisfiable core [2023-12-02 08:22:46,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:22:46,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2271 backedges. 24 proven. 2071 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2023-12-02 08:22:46,956 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:22:49,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2271 backedges. 24 proven. 2071 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2023-12-02 08:22:49,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:22:49,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909491302] [2023-12-02 08:22:49,230 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:22:49,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694618870] [2023-12-02 08:22:49,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694618870] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:22:49,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [870332040] [2023-12-02 08:22:49,231 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 08:22:49,231 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:22:49,231 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:22:49,232 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:22:49,232 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:22:50,031 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:22:50,039 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:22:50,059 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:22:54,376 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '506098#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= 1 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (+ (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) |ULTIMATE.start_main_~y2~0#1|)))' at error location [2023-12-02 08:22:54,376 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:22:54,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:22:54,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 33] total 52 [2023-12-02 08:22:54,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880049135] [2023-12-02 08:22:54,376 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:22:54,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-12-02 08:22:54,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:22:54,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-12-02 08:22:54,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1221, Invalid=4785, Unknown=0, NotChecked=0, Total=6006 [2023-12-02 08:22:54,380 INFO L87 Difference]: Start difference. First operand 20887 states and 24931 transitions. Second operand has 53 states, 51 states have (on average 11.019607843137255) internal successors, (562), 53 states have internal predecessors, (562), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (32), 31 states have call predecessors, (32), 31 states have call successors, (32) [2023-12-02 08:22:59,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:22:59,448 INFO L93 Difference]: Finished difference Result 22703 states and 27034 transitions. [2023-12-02 08:22:59,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-12-02 08:22:59,449 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 51 states have (on average 11.019607843137255) internal successors, (562), 53 states have internal predecessors, (562), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (32), 31 states have call predecessors, (32), 31 states have call successors, (32) Word has length 331 [2023-12-02 08:22:59,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:22:59,476 INFO L225 Difference]: With dead ends: 22703 [2023-12-02 08:22:59,476 INFO L226 Difference]: Without dead ends: 22637 [2023-12-02 08:22:59,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1069 GetRequests, 884 SyntacticMatches, 31 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10876 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=6052, Invalid=18128, Unknown=0, NotChecked=0, Total=24180 [2023-12-02 08:22:59,486 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 801 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 1277 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 1403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:22:59,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [802 Valid, 506 Invalid, 1403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1277 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 08:22:59,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22637 states. [2023-12-02 08:23:00,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22637 to 22455. [2023-12-02 08:23:00,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22455 states, 21248 states have (on average 1.1471197289156627) internal successors, (24374), 21254 states have internal predecessors, (24374), 1159 states have call successors, (1159), 41 states have call predecessors, (1159), 41 states have return successors, (1159), 1159 states have call predecessors, (1159), 1159 states have call successors, (1159) [2023-12-02 08:23:00,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22455 states to 22455 states and 26692 transitions. [2023-12-02 08:23:00,815 INFO L78 Accepts]: Start accepts. Automaton has 22455 states and 26692 transitions. Word has length 331 [2023-12-02 08:23:00,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:23:00,816 INFO L495 AbstractCegarLoop]: Abstraction has 22455 states and 26692 transitions. [2023-12-02 08:23:00,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 51 states have (on average 11.019607843137255) internal successors, (562), 53 states have internal predecessors, (562), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (32), 31 states have call predecessors, (32), 31 states have call successors, (32) [2023-12-02 08:23:00,816 INFO L276 IsEmpty]: Start isEmpty. Operand 22455 states and 26692 transitions. [2023-12-02 08:23:00,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2023-12-02 08:23:00,825 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:23:00,825 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 13, 13, 13, 13, 13, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:23:00,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-12-02 08:23:01,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:23:01,026 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:23:01,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:23:01,026 INFO L85 PathProgramCache]: Analyzing trace with hash 82384261, now seen corresponding path program 4 times [2023-12-02 08:23:01,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:23:01,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459907277] [2023-12-02 08:23:01,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:23:01,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:23:01,040 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:23:01,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2059393044] [2023-12-02 08:23:01,040 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 08:23:01,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:23:01,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:23:01,041 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:23:01,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-12-02 08:23:01,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:23:01,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 08:23:01,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:23:01,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 1013 proven. 1015 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2023-12-02 08:23:01,576 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:23:01,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 961 proven. 1015 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2023-12-02 08:23:01,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:23:01,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459907277] [2023-12-02 08:23:01,910 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:23:01,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059393044] [2023-12-02 08:23:01,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059393044] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:23:01,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1385701989] [2023-12-02 08:23:01,911 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 08:23:01,911 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:23:01,911 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:23:01,911 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:23:01,911 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:23:02,714 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:23:02,722 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:23:02,743 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:23:06,558 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '558253#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= 1 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (+ (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) |ULTIMATE.start_main_~y2~0#1|)))' at error location [2023-12-02 08:23:06,558 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:23:06,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:23:06,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2023-12-02 08:23:06,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986900215] [2023-12-02 08:23:06,558 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:23:06,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-02 08:23:06,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:23:06,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-02 08:23:06,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1918, Unknown=0, NotChecked=0, Total=2162 [2023-12-02 08:23:06,560 INFO L87 Difference]: Start difference. First operand 22455 states and 26692 transitions. Second operand has 22 states, 22 states have (on average 16.59090909090909) internal successors, (365), 22 states have internal predecessors, (365), 21 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2023-12-02 08:23:09,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:23:09,311 INFO L93 Difference]: Finished difference Result 43640 states and 53060 transitions. [2023-12-02 08:23:09,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 08:23:09,311 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 16.59090909090909) internal successors, (365), 22 states have internal predecessors, (365), 21 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) Word has length 331 [2023-12-02 08:23:09,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:23:09,339 INFO L225 Difference]: With dead ends: 43640 [2023-12-02 08:23:09,340 INFO L226 Difference]: Without dead ends: 31671 [2023-12-02 08:23:09,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 998 GetRequests, 907 SyntacticMatches, 39 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2305 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=335, Invalid=2527, Unknown=0, NotChecked=0, Total=2862 [2023-12-02 08:23:09,351 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 256 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 941 SdHoareTripleChecker+Invalid, 1260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 08:23:09,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 941 Invalid, 1260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1258 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 08:23:09,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31671 states. [2023-12-02 08:23:10,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31671 to 24561. [2023-12-02 08:23:10,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24561 states, 23241 states have (on average 1.149477216987221) internal successors, (26715), 23247 states have internal predecessors, (26715), 1272 states have call successors, (1272), 41 states have call predecessors, (1272), 41 states have return successors, (1272), 1272 states have call predecessors, (1272), 1272 states have call successors, (1272) [2023-12-02 08:23:10,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24561 states to 24561 states and 29259 transitions. [2023-12-02 08:23:10,827 INFO L78 Accepts]: Start accepts. Automaton has 24561 states and 29259 transitions. Word has length 331 [2023-12-02 08:23:10,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:23:10,828 INFO L495 AbstractCegarLoop]: Abstraction has 24561 states and 29259 transitions. [2023-12-02 08:23:10,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 16.59090909090909) internal successors, (365), 22 states have internal predecessors, (365), 21 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2023-12-02 08:23:10,828 INFO L276 IsEmpty]: Start isEmpty. Operand 24561 states and 29259 transitions. [2023-12-02 08:23:10,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2023-12-02 08:23:10,835 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:23:10,835 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 13, 13, 13, 13, 13, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:23:10,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-12-02 08:23:11,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:23:11,036 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:23:11,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:23:11,036 INFO L85 PathProgramCache]: Analyzing trace with hash 913563225, now seen corresponding path program 5 times [2023-12-02 08:23:11,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:23:11,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720278705] [2023-12-02 08:23:11,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:23:11,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:23:11,051 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:23:11,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [792995225] [2023-12-02 08:23:11,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 08:23:11,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:23:11,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:23:11,053 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:23:11,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-12-02 08:23:11,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-12-02 08:23:11,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:23:11,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-02 08:23:11,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:23:12,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 19 proven. 1774 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2023-12-02 08:23:12,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:23:12,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:23:12,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720278705] [2023-12-02 08:23:12,687 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:23:12,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792995225] [2023-12-02 08:23:12,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792995225] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:23:12,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1438035788] [2023-12-02 08:23:12,688 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 08:23:12,688 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:23:12,688 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:23:12,689 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:23:12,689 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:23:13,471 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:23:13,479 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:23:13,498 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:23:23,326 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '634818#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= 1 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (+ (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) |ULTIMATE.start_main_~y2~0#1|)))' at error location [2023-12-02 08:23:23,326 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:23:23,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:23:23,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2023-12-02 08:23:23,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781444180] [2023-12-02 08:23:23,327 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 08:23:23,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-02 08:23:23,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:23:23,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-02 08:23:23,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=2663, Unknown=1, NotChecked=0, Total=2970 [2023-12-02 08:23:23,328 INFO L87 Difference]: Start difference. First operand 24561 states and 29259 transitions. Second operand has 27 states, 24 states have (on average 8.416666666666666) internal successors, (202), 26 states have internal predecessors, (202), 11 states have call successors, (12), 1 states have call predecessors, (12), 3 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2023-12-02 08:23:27,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:23:27,293 INFO L93 Difference]: Finished difference Result 24806 states and 29496 transitions. [2023-12-02 08:23:27,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-12-02 08:23:27,293 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 8.416666666666666) internal successors, (202), 26 states have internal predecessors, (202), 11 states have call successors, (12), 1 states have call predecessors, (12), 3 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) Word has length 331 [2023-12-02 08:23:27,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:23:27,316 INFO L225 Difference]: With dead ends: 24806 [2023-12-02 08:23:27,316 INFO L226 Difference]: Without dead ends: 24796 [2023-12-02 08:23:27,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 594 SyntacticMatches, 31 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3980 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=878, Invalid=5927, Unknown=1, NotChecked=0, Total=6806 [2023-12-02 08:23:27,320 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 409 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 1406 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 1478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-02 08:23:27,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 491 Invalid, 1478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1406 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-12-02 08:23:27,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24796 states. [2023-12-02 08:23:28,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24796 to 24643. [2023-12-02 08:23:28,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24643 states, 23320 states have (on average 1.149056603773585) internal successors, (26796), 23326 states have internal predecessors, (26796), 1275 states have call successors, (1275), 41 states have call predecessors, (1275), 41 states have return successors, (1275), 1275 states have call predecessors, (1275), 1275 states have call successors, (1275) [2023-12-02 08:23:28,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24643 states to 24643 states and 29346 transitions. [2023-12-02 08:23:28,745 INFO L78 Accepts]: Start accepts. Automaton has 24643 states and 29346 transitions. Word has length 331 [2023-12-02 08:23:28,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:23:28,746 INFO L495 AbstractCegarLoop]: Abstraction has 24643 states and 29346 transitions. [2023-12-02 08:23:28,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 8.416666666666666) internal successors, (202), 26 states have internal predecessors, (202), 11 states have call successors, (12), 1 states have call predecessors, (12), 3 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2023-12-02 08:23:28,746 INFO L276 IsEmpty]: Start isEmpty. Operand 24643 states and 29346 transitions. [2023-12-02 08:23:28,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2023-12-02 08:23:28,753 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:23:28,753 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 13, 13, 13, 13, 13, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:23:28,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-12-02 08:23:28,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:23:28,954 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:23:28,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:23:28,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1439159975, now seen corresponding path program 6 times [2023-12-02 08:23:28,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:23:28,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767306701] [2023-12-02 08:23:28,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:23:28,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:23:28,966 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:23:28,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [371709572] [2023-12-02 08:23:28,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 08:23:28,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:23:28,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:23:28,967 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:23:28,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-12-02 08:23:29,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 08:23:29,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:23:29,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 08:23:29,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:23:29,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 700 proven. 1135 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2023-12-02 08:23:29,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:23:29,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 168 proven. 1667 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2023-12-02 08:23:29,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:23:29,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767306701] [2023-12-02 08:23:29,795 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:23:29,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371709572] [2023-12-02 08:23:29,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371709572] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:23:29,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [38356288] [2023-12-02 08:23:29,797 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 08:23:29,797 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:23:29,797 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:23:29,797 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:23:29,797 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:23:30,617 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:23:30,625 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:23:30,644 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:23:34,271 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '691622#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= 1 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (+ (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) |ULTIMATE.start_main_~y2~0#1|)))' at error location [2023-12-02 08:23:34,271 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:23:34,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:23:34,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2023-12-02 08:23:34,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659935706] [2023-12-02 08:23:34,272 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:23:34,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 08:23:34,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:23:34,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 08:23:34,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1650, Unknown=0, NotChecked=0, Total=1806 [2023-12-02 08:23:34,273 INFO L87 Difference]: Start difference. First operand 24643 states and 29346 transitions. Second operand has 18 states, 18 states have (on average 16.833333333333332) internal successors, (303), 18 states have internal predecessors, (303), 17 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2023-12-02 08:23:37,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:23:37,981 INFO L93 Difference]: Finished difference Result 25824 states and 30679 transitions. [2023-12-02 08:23:37,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-02 08:23:37,981 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 16.833333333333332) internal successors, (303), 18 states have internal predecessors, (303), 17 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) Word has length 331 [2023-12-02 08:23:37,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:23:38,001 INFO L225 Difference]: With dead ends: 25824 [2023-12-02 08:23:38,001 INFO L226 Difference]: Without dead ends: 21406 [2023-12-02 08:23:38,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1001 GetRequests, 919 SyntacticMatches, 31 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=196, Invalid=2560, Unknown=0, NotChecked=0, Total=2756 [2023-12-02 08:23:38,008 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 258 mSDsluCounter, 2056 mSDsCounter, 0 mSdLazyCounter, 3231 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 2306 SdHoareTripleChecker+Invalid, 3249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 3231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-12-02 08:23:38,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 2306 Invalid, 3249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 3231 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-12-02 08:23:38,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21406 states. [2023-12-02 08:23:39,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21406 to 21282. [2023-12-02 08:23:39,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21282 states, 20127 states have (on average 1.160878422020172) internal successors, (23365), 20133 states have internal predecessors, (23365), 1107 states have call successors, (1107), 41 states have call predecessors, (1107), 41 states have return successors, (1107), 1107 states have call predecessors, (1107), 1107 states have call successors, (1107) [2023-12-02 08:23:39,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21282 states to 21282 states and 25579 transitions. [2023-12-02 08:23:39,132 INFO L78 Accepts]: Start accepts. Automaton has 21282 states and 25579 transitions. Word has length 331 [2023-12-02 08:23:39,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:23:39,132 INFO L495 AbstractCegarLoop]: Abstraction has 21282 states and 25579 transitions. [2023-12-02 08:23:39,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 16.833333333333332) internal successors, (303), 18 states have internal predecessors, (303), 17 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2023-12-02 08:23:39,132 INFO L276 IsEmpty]: Start isEmpty. Operand 21282 states and 25579 transitions. [2023-12-02 08:23:39,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2023-12-02 08:23:39,137 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:23:39,137 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 12, 12, 12, 12, 12, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:23:39,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-12-02 08:23:39,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:23:39,338 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:23:39,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:23:39,338 INFO L85 PathProgramCache]: Analyzing trace with hash -117872265, now seen corresponding path program 7 times [2023-12-02 08:23:39,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:23:39,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883456654] [2023-12-02 08:23:39,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:23:39,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:23:39,350 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:23:39,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1153480034] [2023-12-02 08:23:39,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 08:23:39,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:23:39,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:23:39,351 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:23:39,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-12-02 08:23:39,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:23:39,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 08:23:39,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:23:39,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2183 backedges. 14 proven. 1971 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2023-12-02 08:23:39,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:23:40,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2183 backedges. 14 proven. 1971 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2023-12-02 08:23:40,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:23:40,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883456654] [2023-12-02 08:23:40,630 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:23:40,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153480034] [2023-12-02 08:23:40,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153480034] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:23:40,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1955678196] [2023-12-02 08:23:40,631 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 08:23:40,631 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:23:40,632 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:23:40,632 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:23:40,632 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:23:41,366 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:23:41,374 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:23:41,393 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:23:45,187 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '745819#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= 1 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (+ (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) |ULTIMATE.start_main_~y2~0#1|)))' at error location [2023-12-02 08:23:45,187 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:23:45,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:23:45,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2023-12-02 08:23:45,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611353616] [2023-12-02 08:23:45,187 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:23:45,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-02 08:23:45,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:23:45,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-02 08:23:45,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=627, Invalid=3155, Unknown=0, NotChecked=0, Total=3782 [2023-12-02 08:23:45,190 INFO L87 Difference]: Start difference. First operand 21282 states and 25579 transitions. Second operand has 37 states, 35 states have (on average 16.057142857142857) internal successors, (562), 37 states have internal predecessors, (562), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (32), 31 states have call predecessors, (32), 31 states have call successors, (32) [2023-12-02 08:23:49,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:23:49,642 INFO L93 Difference]: Finished difference Result 32636 states and 39042 transitions. [2023-12-02 08:23:49,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2023-12-02 08:23:49,642 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 16.057142857142857) internal successors, (562), 37 states have internal predecessors, (562), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (32), 31 states have call predecessors, (32), 31 states have call successors, (32) Word has length 331 [2023-12-02 08:23:49,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:23:49,671 INFO L225 Difference]: With dead ends: 32636 [2023-12-02 08:23:49,671 INFO L226 Difference]: Without dead ends: 32570 [2023-12-02 08:23:49,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1066 GetRequests, 900 SyntacticMatches, 31 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8382 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=4363, Invalid=14269, Unknown=0, NotChecked=0, Total=18632 [2023-12-02 08:23:49,678 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 954 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 955 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 08:23:49,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [955 Valid, 311 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 08:23:49,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32570 states. [2023-12-02 08:23:51,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32570 to 30820. [2023-12-02 08:23:51,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30820 states, 29198 states have (on average 1.1349749982875539) internal successors, (33139), 29204 states have internal predecessors, (33139), 1574 states have call successors, (1574), 41 states have call predecessors, (1574), 41 states have return successors, (1574), 1574 states have call predecessors, (1574), 1574 states have call successors, (1574) [2023-12-02 08:23:51,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30820 states to 30820 states and 36287 transitions. [2023-12-02 08:23:51,474 INFO L78 Accepts]: Start accepts. Automaton has 30820 states and 36287 transitions. Word has length 331 [2023-12-02 08:23:51,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:23:51,474 INFO L495 AbstractCegarLoop]: Abstraction has 30820 states and 36287 transitions. [2023-12-02 08:23:51,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 16.057142857142857) internal successors, (562), 37 states have internal predecessors, (562), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (32), 31 states have call predecessors, (32), 31 states have call successors, (32) [2023-12-02 08:23:51,475 INFO L276 IsEmpty]: Start isEmpty. Operand 30820 states and 36287 transitions. [2023-12-02 08:23:51,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2023-12-02 08:23:51,478 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:23:51,478 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:23:51,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-12-02 08:23:51,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-12-02 08:23:51,678 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:23:51,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:23:51,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1644435744, now seen corresponding path program 2 times [2023-12-02 08:23:51,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:23:51,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670023674] [2023-12-02 08:23:51,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:23:51,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:23:51,691 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:23:51,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [187292046] [2023-12-02 08:23:51,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 08:23:51,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:23:51,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:23:51,692 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:23:51,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-12-02 08:23:51,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 08:23:51,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:23:51,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 08:23:51,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:23:51,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2510 backedges. 258 proven. 0 refuted. 0 times theorem prover too weak. 2252 trivial. 0 not checked. [2023-12-02 08:23:51,791 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:23:51,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:23:51,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670023674] [2023-12-02 08:23:51,792 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:23:51,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187292046] [2023-12-02 08:23:51,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187292046] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:23:51,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:23:51,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 08:23:51,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506336986] [2023-12-02 08:23:51,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:23:51,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 08:23:51,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:23:51,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 08:23:51,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 08:23:51,793 INFO L87 Difference]: Start difference. First operand 30820 states and 36287 transitions. Second operand has 5 states, 4 states have (on average 10.5) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 08:23:53,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:23:53,342 INFO L93 Difference]: Finished difference Result 30820 states and 36287 transitions. [2023-12-02 08:23:53,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 08:23:53,342 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.5) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 347 [2023-12-02 08:23:53,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:23:53,371 INFO L225 Difference]: With dead ends: 30820 [2023-12-02 08:23:53,371 INFO L226 Difference]: Without dead ends: 30819 [2023-12-02 08:23:53,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-02 08:23:53,376 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 19 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 08:23:53,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 104 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 08:23:53,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30819 states. [2023-12-02 08:23:55,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30819 to 30808. [2023-12-02 08:23:55,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30808 states, 29187 states have (on average 1.0845239318874842) internal successors, (31654), 29193 states have internal predecessors, (31654), 1574 states have call successors, (1574), 41 states have call predecessors, (1574), 41 states have return successors, (1574), 1573 states have call predecessors, (1574), 1574 states have call successors, (1574) [2023-12-02 08:23:55,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30808 states to 30808 states and 34802 transitions. [2023-12-02 08:23:55,114 INFO L78 Accepts]: Start accepts. Automaton has 30808 states and 34802 transitions. Word has length 347 [2023-12-02 08:23:55,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:23:55,114 INFO L495 AbstractCegarLoop]: Abstraction has 30808 states and 34802 transitions. [2023-12-02 08:23:55,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.5) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 08:23:55,115 INFO L276 IsEmpty]: Start isEmpty. Operand 30808 states and 34802 transitions. [2023-12-02 08:23:55,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2023-12-02 08:23:55,120 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:23:55,120 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:23:55,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-12-02 08:23:55,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-12-02 08:23:55,321 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:23:55,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:23:55,321 INFO L85 PathProgramCache]: Analyzing trace with hash -425974389, now seen corresponding path program 1 times [2023-12-02 08:23:55,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:23:55,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953354992] [2023-12-02 08:23:55,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:23:55,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:23:55,334 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:23:55,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [785544493] [2023-12-02 08:23:55,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:23:55,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:23:55,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:23:55,335 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:23:55,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-12-02 08:23:55,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:23:55,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-02 08:23:55,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:23:56,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2330 backedges. 0 proven. 2328 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 08:23:56,084 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:23:57,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2330 backedges. 0 proven. 2088 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2023-12-02 08:23:57,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:23:57,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953354992] [2023-12-02 08:23:57,163 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:23:57,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785544493] [2023-12-02 08:23:57,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785544493] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:23:57,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [575370576] [2023-12-02 08:23:57,164 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2023-12-02 08:23:57,164 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:23:57,165 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:23:57,165 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:23:57,165 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:23:57,907 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:23:57,915 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:23:57,935 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:24:02,960 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '887499#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 101 ~counter~0) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 4611686014132420609)) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= ~counter~0 2147483647) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 08:24:02,961 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:24:02,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:24:02,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36] total 70 [2023-12-02 08:24:02,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128985221] [2023-12-02 08:24:02,961 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:24:02,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2023-12-02 08:24:02,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:24:02,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2023-12-02 08:24:02,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1551, Invalid=7761, Unknown=0, NotChecked=0, Total=9312 [2023-12-02 08:24:02,966 INFO L87 Difference]: Start difference. First operand 30808 states and 34802 transitions. Second operand has 70 states, 70 states have (on average 8.7) internal successors, (609), 70 states have internal predecessors, (609), 34 states have call successors, (36), 18 states have call predecessors, (36), 18 states have return successors, (36), 34 states have call predecessors, (36), 34 states have call successors, (36) [2023-12-02 08:24:07,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:24:07,154 INFO L93 Difference]: Finished difference Result 35754 states and 40404 transitions. [2023-12-02 08:24:07,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2023-12-02 08:24:07,154 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 8.7) internal successors, (609), 70 states have internal predecessors, (609), 34 states have call successors, (36), 18 states have call predecessors, (36), 18 states have return successors, (36), 34 states have call predecessors, (36), 34 states have call successors, (36) Word has length 350 [2023-12-02 08:24:07,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:24:07,186 INFO L225 Difference]: With dead ends: 35754 [2023-12-02 08:24:07,186 INFO L226 Difference]: Without dead ends: 35746 [2023-12-02 08:24:07,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1115 GetRequests, 920 SyntacticMatches, 33 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12150 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=6241, Invalid=20491, Unknown=0, NotChecked=0, Total=26732 [2023-12-02 08:24:07,194 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 621 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 08:24:07,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [621 Valid, 911 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 08:24:07,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35746 states. [2023-12-02 08:24:09,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35746 to 35391. [2023-12-02 08:24:09,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35391 states, 33485 states have (on average 1.079796923995819) internal successors, (36157), 33492 states have internal predecessors, (36157), 1812 states have call successors, (1812), 88 states have call predecessors, (1812), 88 states have return successors, (1812), 1810 states have call predecessors, (1812), 1812 states have call successors, (1812) [2023-12-02 08:24:09,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35391 states to 35391 states and 39781 transitions. [2023-12-02 08:24:09,428 INFO L78 Accepts]: Start accepts. Automaton has 35391 states and 39781 transitions. Word has length 350 [2023-12-02 08:24:09,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:24:09,429 INFO L495 AbstractCegarLoop]: Abstraction has 35391 states and 39781 transitions. [2023-12-02 08:24:09,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 8.7) internal successors, (609), 70 states have internal predecessors, (609), 34 states have call successors, (36), 18 states have call predecessors, (36), 18 states have return successors, (36), 34 states have call predecessors, (36), 34 states have call successors, (36) [2023-12-02 08:24:09,429 INFO L276 IsEmpty]: Start isEmpty. Operand 35391 states and 39781 transitions. [2023-12-02 08:24:09,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2023-12-02 08:24:09,433 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:24:09,434 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:24:09,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-12-02 08:24:09,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-12-02 08:24:09,634 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:24:09,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:24:09,635 INFO L85 PathProgramCache]: Analyzing trace with hash -425973971, now seen corresponding path program 11 times [2023-12-02 08:24:09,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:24:09,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917590809] [2023-12-02 08:24:09,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:24:09,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:24:09,649 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:24:09,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2119064376] [2023-12-02 08:24:09,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 08:24:09,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:24:09,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:24:09,650 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:24:09,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-12-02 08:24:10,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2023-12-02 08:24:10,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:24:10,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 08:24:10,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:24:10,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2362 backedges. 0 proven. 2015 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2023-12-02 08:24:10,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:24:11,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2362 backedges. 0 proven. 2015 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2023-12-02 08:24:11,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:24:11,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917590809] [2023-12-02 08:24:11,305 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:24:11,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119064376] [2023-12-02 08:24:11,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119064376] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:24:11,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [592121738] [2023-12-02 08:24:11,306 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 08:24:11,306 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:24:11,306 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:24:11,306 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:24:11,307 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:24:12,092 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:24:12,099 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:24:12,119 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:24:16,173 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '968582#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 1 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= ~counter~0 100) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 08:24:16,173 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:24:16,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:24:16,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2023-12-02 08:24:16,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675343352] [2023-12-02 08:24:16,173 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:24:16,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 08:24:16,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:24:16,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 08:24:16,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=2061, Unknown=0, NotChecked=0, Total=2352 [2023-12-02 08:24:16,175 INFO L87 Difference]: Start difference. First operand 35391 states and 39781 transitions. Second operand has 24 states, 23 states have (on average 17.869565217391305) internal successors, (411), 24 states have internal predecessors, (411), 19 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2023-12-02 08:24:25,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:24:25,886 INFO L93 Difference]: Finished difference Result 35681 states and 39973 transitions. [2023-12-02 08:24:25,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2023-12-02 08:24:25,887 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 17.869565217391305) internal successors, (411), 24 states have internal predecessors, (411), 19 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) Word has length 350 [2023-12-02 08:24:25,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:24:25,931 INFO L225 Difference]: With dead ends: 35681 [2023-12-02 08:24:25,931 INFO L226 Difference]: Without dead ends: 35677 [2023-12-02 08:24:25,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1176 GetRequests, 968 SyntacticMatches, 33 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14857 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=6352, Invalid=24800, Unknown=0, NotChecked=0, Total=31152 [2023-12-02 08:24:25,940 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 1566 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1567 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 1199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-12-02 08:24:25,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1567 Valid, 559 Invalid, 1199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1072 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-12-02 08:24:25,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35677 states. [2023-12-02 08:24:28,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35677 to 35391. [2023-12-02 08:24:28,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35391 states, 33485 states have (on average 1.0792593698671047) internal successors, (36139), 33492 states have internal predecessors, (36139), 1812 states have call successors, (1812), 88 states have call predecessors, (1812), 88 states have return successors, (1812), 1810 states have call predecessors, (1812), 1812 states have call successors, (1812) [2023-12-02 08:24:28,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35391 states to 35391 states and 39763 transitions. [2023-12-02 08:24:28,483 INFO L78 Accepts]: Start accepts. Automaton has 35391 states and 39763 transitions. Word has length 350 [2023-12-02 08:24:28,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:24:28,484 INFO L495 AbstractCegarLoop]: Abstraction has 35391 states and 39763 transitions. [2023-12-02 08:24:28,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 17.869565217391305) internal successors, (411), 24 states have internal predecessors, (411), 19 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2023-12-02 08:24:28,484 INFO L276 IsEmpty]: Start isEmpty. Operand 35391 states and 39763 transitions. [2023-12-02 08:24:28,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2023-12-02 08:24:28,487 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:24:28,488 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:24:28,492 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2023-12-02 08:24:28,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-12-02 08:24:28,688 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:24:28,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:24:28,689 INFO L85 PathProgramCache]: Analyzing trace with hash 114683895, now seen corresponding path program 12 times [2023-12-02 08:24:28,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:24:28,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170053793] [2023-12-02 08:24:28,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:24:28,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:24:28,708 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:24:28,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2134805959] [2023-12-02 08:24:28,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 08:24:28,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:24:28,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:24:28,709 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:24:28,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-12-02 08:24:28,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 08:24:28,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:24:28,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 08:24:28,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:24:29,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2840 backedges. 1111 proven. 1455 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2023-12-02 08:24:29,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:24:29,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2840 backedges. 1111 proven. 1455 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2023-12-02 08:24:29,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:24:29,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170053793] [2023-12-02 08:24:29,995 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:24:29,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134805959] [2023-12-02 08:24:29,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134805959] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:24:29,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [24916991] [2023-12-02 08:24:29,996 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 08:24:29,996 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:24:29,996 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:24:29,996 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:24:29,996 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:24:30,831 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:24:30,839 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:24:30,858 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:24:35,403 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1049807#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 1 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= ~counter~0 100) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 08:24:35,403 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:24:35,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:24:35,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 36 [2023-12-02 08:24:35,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16875031] [2023-12-02 08:24:35,403 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:24:35,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-02 08:24:35,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:24:35,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-02 08:24:35,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=475, Invalid=3185, Unknown=0, NotChecked=0, Total=3660 [2023-12-02 08:24:35,406 INFO L87 Difference]: Start difference. First operand 35391 states and 39763 transitions. Second operand has 36 states, 36 states have (on average 16.333333333333332) internal successors, (588), 36 states have internal predecessors, (588), 33 states have call successors, (34), 1 states have call predecessors, (34), 1 states have return successors, (34), 33 states have call predecessors, (34), 33 states have call successors, (34) [2023-12-02 08:24:43,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:24:43,623 INFO L93 Difference]: Finished difference Result 92312 states and 105822 transitions. [2023-12-02 08:24:43,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-12-02 08:24:43,624 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 16.333333333333332) internal successors, (588), 36 states have internal predecessors, (588), 33 states have call successors, (34), 1 states have call predecessors, (34), 1 states have return successors, (34), 33 states have call predecessors, (34), 33 states have call successors, (34) Word has length 371 [2023-12-02 08:24:43,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:24:43,725 INFO L225 Difference]: With dead ends: 92312 [2023-12-02 08:24:43,725 INFO L226 Difference]: Without dead ends: 75960 [2023-12-02 08:24:43,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1186 GetRequests, 1015 SyntacticMatches, 37 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8263 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=2805, Invalid=15555, Unknown=0, NotChecked=0, Total=18360 [2023-12-02 08:24:43,747 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 2067 mSDsluCounter, 1049 mSDsCounter, 0 mSdLazyCounter, 2324 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2067 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 2474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 2324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-12-02 08:24:43,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2067 Valid, 1212 Invalid, 2474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 2324 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-12-02 08:24:43,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75960 states. [2023-12-02 08:24:47,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75960 to 55569. [2023-12-02 08:24:47,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55569 states, 52607 states have (on average 1.0808637633774973) internal successors, (56861), 52614 states have internal predecessors, (56861), 2868 states have call successors, (2868), 88 states have call predecessors, (2868), 88 states have return successors, (2868), 2866 states have call predecessors, (2868), 2868 states have call successors, (2868) [2023-12-02 08:24:47,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55569 states to 55569 states and 62597 transitions. [2023-12-02 08:24:47,494 INFO L78 Accepts]: Start accepts. Automaton has 55569 states and 62597 transitions. Word has length 371 [2023-12-02 08:24:47,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:24:47,494 INFO L495 AbstractCegarLoop]: Abstraction has 55569 states and 62597 transitions. [2023-12-02 08:24:47,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 16.333333333333332) internal successors, (588), 36 states have internal predecessors, (588), 33 states have call successors, (34), 1 states have call predecessors, (34), 1 states have return successors, (34), 33 states have call predecessors, (34), 33 states have call successors, (34) [2023-12-02 08:24:47,494 INFO L276 IsEmpty]: Start isEmpty. Operand 55569 states and 62597 transitions. [2023-12-02 08:24:47,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2023-12-02 08:24:47,499 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:24:47,499 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 15, 15, 15, 15, 15, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:24:47,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2023-12-02 08:24:47,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2023-12-02 08:24:47,699 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:24:47,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:24:47,700 INFO L85 PathProgramCache]: Analyzing trace with hash -278902753, now seen corresponding path program 13 times [2023-12-02 08:24:47,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:24:47,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971297829] [2023-12-02 08:24:47,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:24:47,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:24:47,715 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:24:47,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1620196259] [2023-12-02 08:24:47,715 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 08:24:47,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:24:47,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:24:47,716 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:24:47,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-12-02 08:24:47,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:24:47,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 08:24:47,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:24:48,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3143 backedges. 0 proven. 2305 refuted. 0 times theorem prover too weak. 838 trivial. 0 not checked. [2023-12-02 08:24:48,638 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:24:48,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:24:48,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971297829] [2023-12-02 08:24:48,737 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:24:48,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620196259] [2023-12-02 08:24:48,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620196259] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:24:48,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [895825029] [2023-12-02 08:24:48,738 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 08:24:48,738 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:24:48,738 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:24:48,738 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:24:48,739 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:24:49,591 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:24:49,600 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:24:49,619 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:24:53,598 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1214828#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 4611686014132420609)) (<= 1 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= ~counter~0 100) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 08:24:53,598 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:24:53,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:24:53,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-12-02 08:24:53,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499347853] [2023-12-02 08:24:53,599 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 08:24:53,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 08:24:53,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:24:53,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 08:24:53,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1319, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 08:24:53,600 INFO L87 Difference]: Start difference. First operand 55569 states and 62597 transitions. Second operand has 12 states, 11 states have (on average 14.909090909090908) internal successors, (164), 12 states have internal predecessors, (164), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-12-02 08:24:57,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:24:57,220 INFO L93 Difference]: Finished difference Result 56027 states and 63099 transitions. [2023-12-02 08:24:57,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 08:24:57,221 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 14.909090909090908) internal successors, (164), 12 states have internal predecessors, (164), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 392 [2023-12-02 08:24:57,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:24:57,282 INFO L225 Difference]: With dead ends: 56027 [2023-12-02 08:24:57,282 INFO L226 Difference]: Without dead ends: 56026 [2023-12-02 08:24:57,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 799 GetRequests, 724 SyntacticMatches, 37 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1170 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=172, Invalid=1388, Unknown=0, NotChecked=0, Total=1560 [2023-12-02 08:24:57,291 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 57 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 08:24:57,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 538 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 08:24:57,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56026 states. [2023-12-02 08:25:00,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56026 to 55569. [2023-12-02 08:25:00,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55569 states, 52607 states have (on average 1.0808447545003517) internal successors, (56860), 52614 states have internal predecessors, (56860), 2868 states have call successors, (2868), 88 states have call predecessors, (2868), 88 states have return successors, (2868), 2866 states have call predecessors, (2868), 2868 states have call successors, (2868) [2023-12-02 08:25:01,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55569 states to 55569 states and 62596 transitions. [2023-12-02 08:25:01,056 INFO L78 Accepts]: Start accepts. Automaton has 55569 states and 62596 transitions. Word has length 392 [2023-12-02 08:25:01,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:25:01,057 INFO L495 AbstractCegarLoop]: Abstraction has 55569 states and 62596 transitions. [2023-12-02 08:25:01,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 14.909090909090908) internal successors, (164), 12 states have internal predecessors, (164), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-12-02 08:25:01,057 INFO L276 IsEmpty]: Start isEmpty. Operand 55569 states and 62596 transitions. [2023-12-02 08:25:01,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2023-12-02 08:25:01,064 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:25:01,064 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 18, 18, 18, 18, 18, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:25:01,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-12-02 08:25:01,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-12-02 08:25:01,264 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:25:01,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:25:01,265 INFO L85 PathProgramCache]: Analyzing trace with hash 376431085, now seen corresponding path program 14 times [2023-12-02 08:25:01,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:25:01,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605185326] [2023-12-02 08:25:01,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:25:01,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:25:01,278 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:25:01,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1326733341] [2023-12-02 08:25:01,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 08:25:01,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:25:01,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:25:01,280 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:25:01,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-12-02 08:25:01,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-12-02 08:25:01,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:25:01,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 08:25:01,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:25:01,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4322 backedges. 1850 proven. 419 refuted. 0 times theorem prover too weak. 2053 trivial. 0 not checked. [2023-12-02 08:25:01,593 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:25:01,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:25:01,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605185326] [2023-12-02 08:25:01,724 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:25:01,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326733341] [2023-12-02 08:25:01,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326733341] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:25:01,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [117011042] [2023-12-02 08:25:01,725 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 08:25:01,725 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:25:01,726 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:25:01,726 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:25:01,726 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:25:02,535 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:25:02,543 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:25:02,627 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:25:06,869 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1339797#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 1 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= ~counter~0 100) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 08:25:06,869 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:25:06,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:25:06,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-12-02 08:25:06,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978478449] [2023-12-02 08:25:06,870 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 08:25:06,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 08:25:06,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:25:06,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 08:25:06,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1403, Unknown=0, NotChecked=0, Total=1560 [2023-12-02 08:25:06,871 INFO L87 Difference]: Start difference. First operand 55569 states and 62596 transitions. Second operand has 12 states, 11 states have (on average 14.727272727272727) internal successors, (162), 12 states have internal predecessors, (162), 8 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2023-12-02 08:25:10,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:25:10,688 INFO L93 Difference]: Finished difference Result 57050 states and 64155 transitions. [2023-12-02 08:25:10,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 08:25:10,689 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 14.727272727272727) internal successors, (162), 12 states have internal predecessors, (162), 8 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 455 [2023-12-02 08:25:10,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:25:10,769 INFO L225 Difference]: With dead ends: 57050 [2023-12-02 08:25:10,769 INFO L226 Difference]: Without dead ends: 54720 [2023-12-02 08:25:10,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 939 GetRequests, 850 SyntacticMatches, 43 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1453 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=217, Invalid=2039, Unknown=0, NotChecked=0, Total=2256 [2023-12-02 08:25:10,785 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 216 mSDsluCounter, 1221 mSDsCounter, 0 mSdLazyCounter, 1779 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 1411 SdHoareTripleChecker+Invalid, 1802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 08:25:10,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 1411 Invalid, 1802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1779 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 08:25:10,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54720 states. [2023-12-02 08:25:14,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54720 to 50583. [2023-12-02 08:25:14,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50583 states, 47876 states have (on average 1.0810009190408556) internal successors, (51754), 47889 states have internal predecessors, (51754), 2613 states have call successors, (2613), 88 states have call predecessors, (2613), 88 states have return successors, (2613), 2605 states have call predecessors, (2613), 2613 states have call successors, (2613) [2023-12-02 08:25:14,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50583 states to 50583 states and 56980 transitions. [2023-12-02 08:25:14,160 INFO L78 Accepts]: Start accepts. Automaton has 50583 states and 56980 transitions. Word has length 455 [2023-12-02 08:25:14,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:25:14,160 INFO L495 AbstractCegarLoop]: Abstraction has 50583 states and 56980 transitions. [2023-12-02 08:25:14,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 14.727272727272727) internal successors, (162), 12 states have internal predecessors, (162), 8 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2023-12-02 08:25:14,160 INFO L276 IsEmpty]: Start isEmpty. Operand 50583 states and 56980 transitions. [2023-12-02 08:25:14,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2023-12-02 08:25:14,168 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:25:14,168 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 20, 20, 20, 20, 20, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:25:14,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2023-12-02 08:25:14,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:25:14,368 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:25:14,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:25:14,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1391143293, now seen corresponding path program 15 times [2023-12-02 08:25:14,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:25:14,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344155908] [2023-12-02 08:25:14,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:25:14,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:25:14,383 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:25:14,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151406553] [2023-12-02 08:25:14,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 08:25:14,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:25:14,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:25:14,385 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:25:14,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-12-02 08:25:14,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 08:25:14,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:25:14,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 08:25:14,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:25:15,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4825 backedges. 0 proven. 3356 refuted. 0 times theorem prover too weak. 1469 trivial. 0 not checked. [2023-12-02 08:25:15,563 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:25:16,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4825 backedges. 0 proven. 3356 refuted. 0 times theorem prover too weak. 1469 trivial. 0 not checked. [2023-12-02 08:25:16,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:25:16,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344155908] [2023-12-02 08:25:16,507 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:25:16,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151406553] [2023-12-02 08:25:16,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151406553] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:25:16,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [474729494] [2023-12-02 08:25:16,509 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 08:25:16,509 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:25:16,509 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:25:16,509 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:25:16,509 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:25:17,307 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:25:17,314 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:25:17,334 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:25:23,829 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1461875#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 4611686014132420609)) (<= 1 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= ~counter~0 100) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 08:25:23,829 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:25:23,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:25:23,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2023-12-02 08:25:23,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618908778] [2023-12-02 08:25:23,830 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:25:23,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-02 08:25:23,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:25:23,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-02 08:25:23,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=2650, Unknown=0, NotChecked=0, Total=2970 [2023-12-02 08:25:23,832 INFO L87 Difference]: Start difference. First operand 50583 states and 56980 transitions. Second operand has 30 states, 29 states have (on average 15.827586206896552) internal successors, (459), 30 states have internal predecessors, (459), 25 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 25 states have call predecessors, (26), 25 states have call successors, (26) [2023-12-02 08:25:36,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:25:36,723 INFO L93 Difference]: Finished difference Result 57385 states and 64608 transitions. [2023-12-02 08:25:36,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-12-02 08:25:36,723 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 15.827586206896552) internal successors, (459), 30 states have internal predecessors, (459), 25 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 25 states have call predecessors, (26), 25 states have call successors, (26) Word has length 476 [2023-12-02 08:25:36,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:25:36,780 INFO L225 Difference]: With dead ends: 57385 [2023-12-02 08:25:36,780 INFO L226 Difference]: Without dead ends: 57333 [2023-12-02 08:25:36,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1494 GetRequests, 1328 SyntacticMatches, 45 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5874 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=2570, Invalid=12436, Unknown=0, NotChecked=0, Total=15006 [2023-12-02 08:25:36,789 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 1114 mSDsluCounter, 1995 mSDsCounter, 0 mSdLazyCounter, 4080 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1116 SdHoareTripleChecker+Valid, 2141 SdHoareTripleChecker+Invalid, 4385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 4080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-02 08:25:36,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1116 Valid, 2141 Invalid, 4385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 4080 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-02 08:25:36,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57333 states. [2023-12-02 08:25:40,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57333 to 54912. [2023-12-02 08:25:40,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54912 states, 51982 states have (on average 1.0806240621753684) internal successors, (56173), 52005 states have internal predecessors, (56173), 2836 states have call successors, (2836), 88 states have call predecessors, (2836), 88 states have return successors, (2836), 2818 states have call predecessors, (2836), 2836 states have call successors, (2836) [2023-12-02 08:25:40,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54912 states to 54912 states and 61845 transitions. [2023-12-02 08:25:40,486 INFO L78 Accepts]: Start accepts. Automaton has 54912 states and 61845 transitions. Word has length 476 [2023-12-02 08:25:40,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:25:40,487 INFO L495 AbstractCegarLoop]: Abstraction has 54912 states and 61845 transitions. [2023-12-02 08:25:40,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 15.827586206896552) internal successors, (459), 30 states have internal predecessors, (459), 25 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 25 states have call predecessors, (26), 25 states have call successors, (26) [2023-12-02 08:25:40,487 INFO L276 IsEmpty]: Start isEmpty. Operand 54912 states and 61845 transitions. [2023-12-02 08:25:40,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2023-12-02 08:25:40,494 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:25:40,494 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 18, 18, 18, 18, 18, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:25:40,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-12-02 08:25:40,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-12-02 08:25:40,695 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:25:40,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:25:40,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1371112809, now seen corresponding path program 16 times [2023-12-02 08:25:40,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:25:40,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655591812] [2023-12-02 08:25:40,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:25:40,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:25:40,713 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:25:40,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [948710583] [2023-12-02 08:25:40,713 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 08:25:40,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:25:40,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:25:40,714 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:25:40,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-12-02 08:25:40,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:25:40,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 08:25:40,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:25:41,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4697 backedges. 2584 proven. 1344 refuted. 0 times theorem prover too weak. 769 trivial. 0 not checked. [2023-12-02 08:25:41,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:25:41,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4697 backedges. 1882 proven. 1876 refuted. 0 times theorem prover too weak. 939 trivial. 0 not checked. [2023-12-02 08:25:41,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:25:41,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655591812] [2023-12-02 08:25:41,669 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:25:41,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948710583] [2023-12-02 08:25:41,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948710583] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:25:41,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [841418485] [2023-12-02 08:25:41,670 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 08:25:41,670 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:25:41,670 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:25:41,670 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:25:41,670 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:25:42,465 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:25:42,473 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:25:42,492 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:25:46,451 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1589198#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 1 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= ~counter~0 100) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 08:25:46,452 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:25:46,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:25:46,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2023-12-02 08:25:46,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451237592] [2023-12-02 08:25:46,452 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:25:46,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 08:25:46,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:25:46,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 08:25:46,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1675, Unknown=0, NotChecked=0, Total=1892 [2023-12-02 08:25:46,454 INFO L87 Difference]: Start difference. First operand 54912 states and 61845 transitions. Second operand has 19 states, 19 states have (on average 17.57894736842105) internal successors, (334), 19 states have internal predecessors, (334), 19 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2023-12-02 08:25:50,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:25:50,628 INFO L93 Difference]: Finished difference Result 56579 states and 63706 transitions. [2023-12-02 08:25:50,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 08:25:50,629 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 17.57894736842105) internal successors, (334), 19 states have internal predecessors, (334), 19 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) Word has length 476 [2023-12-02 08:25:50,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:25:50,682 INFO L225 Difference]: With dead ends: 56579 [2023-12-02 08:25:50,682 INFO L226 Difference]: Without dead ends: 53874 [2023-12-02 08:25:50,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1432 GetRequests, 1332 SyntacticMatches, 52 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2499 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=286, Invalid=2164, Unknown=0, NotChecked=0, Total=2450 [2023-12-02 08:25:50,691 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 197 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 08:25:50,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 787 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1057 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 08:25:50,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53874 states. [2023-12-02 08:25:54,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53874 to 53816. [2023-12-02 08:25:54,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53816 states, 50942 states have (on average 1.0814259353774882) internal successors, (55090), 50965 states have internal predecessors, (55090), 2780 states have call successors, (2780), 88 states have call predecessors, (2780), 88 states have return successors, (2780), 2762 states have call predecessors, (2780), 2780 states have call successors, (2780) [2023-12-02 08:25:54,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53816 states to 53816 states and 60650 transitions. [2023-12-02 08:25:54,609 INFO L78 Accepts]: Start accepts. Automaton has 53816 states and 60650 transitions. Word has length 476 [2023-12-02 08:25:54,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:25:54,609 INFO L495 AbstractCegarLoop]: Abstraction has 53816 states and 60650 transitions. [2023-12-02 08:25:54,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 17.57894736842105) internal successors, (334), 19 states have internal predecessors, (334), 19 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2023-12-02 08:25:54,609 INFO L276 IsEmpty]: Start isEmpty. Operand 53816 states and 60650 transitions. [2023-12-02 08:25:54,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2023-12-02 08:25:54,621 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:25:54,622 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 22, 22, 22, 22, 22, 22, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:25:54,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2023-12-02 08:25:54,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-12-02 08:25:54,822 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:25:54,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:25:54,823 INFO L85 PathProgramCache]: Analyzing trace with hash -812291510, now seen corresponding path program 4 times [2023-12-02 08:25:54,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:25:54,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467632673] [2023-12-02 08:25:54,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:25:54,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:25:54,852 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:25:54,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1098888397] [2023-12-02 08:25:54,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 08:25:54,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:25:54,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:25:54,854 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:25:54,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-12-02 08:25:55,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:25:55,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 08:25:55,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:25:55,568 INFO L134 CoverageAnalysis]: Checked inductivity of 5205 backedges. 0 proven. 4697 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2023-12-02 08:25:55,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:25:56,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5205 backedges. 0 proven. 4697 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2023-12-02 08:25:56,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:25:56,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467632673] [2023-12-02 08:25:56,466 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:25:56,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098888397] [2023-12-02 08:25:56,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098888397] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:25:56,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [742812728] [2023-12-02 08:25:56,468 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-12-02 08:25:56,468 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:25:56,468 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:25:56,468 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:25:56,468 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:25:57,472 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-12-02 08:25:57,477 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:25:57,496 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:26:01,096 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1714406#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (= 2147483647 |ULTIMATE.start_main_~y2~0#1|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (= |ULTIMATE.start_main_~y1~0#1| 0) (<= 1 ~counter~0) (not (= |ULTIMATE.start_main_~y3~0#1| 0)) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (= (+ 2147483647 |ULTIMATE.start_main_~y3~0#1|) |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-12-02 08:26:01,097 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:26:01,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:26:01,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2023-12-02 08:26:01,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272118828] [2023-12-02 08:26:01,097 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:26:01,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-12-02 08:26:01,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:26:01,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-12-02 08:26:01,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1223, Invalid=3469, Unknown=0, NotChecked=0, Total=4692 [2023-12-02 08:26:01,100 INFO L87 Difference]: Start difference. First operand 53816 states and 60650 transitions. Second operand has 48 states, 47 states have (on average 17.51063829787234) internal successors, (823), 48 states have internal predecessors, (823), 47 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) [2023-12-02 08:26:06,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:26:06,377 INFO L93 Difference]: Finished difference Result 69278 states and 79404 transitions. [2023-12-02 08:26:06,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-02 08:26:06,378 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 17.51063829787234) internal successors, (823), 48 states have internal predecessors, (823), 47 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) Word has length 486 [2023-12-02 08:26:06,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:26:06,442 INFO L225 Difference]: With dead ends: 69278 [2023-12-02 08:26:06,442 INFO L226 Difference]: Without dead ends: 69277 [2023-12-02 08:26:06,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1456 GetRequests, 1366 SyntacticMatches, 23 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3303 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1223, Invalid=3469, Unknown=0, NotChecked=0, Total=4692 [2023-12-02 08:26:06,449 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 1094 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1094 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 08:26:06,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1094 Valid, 726 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 08:26:06,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69277 states. [2023-12-02 08:26:11,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69277 to 66981. [2023-12-02 08:26:11,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66981 states, 63415 states have (on average 1.0968382874714184) internal successors, (69556), 63438 states have internal predecessors, (69556), 3472 states have call successors, (3472), 88 states have call predecessors, (3472), 88 states have return successors, (3472), 3454 states have call predecessors, (3472), 3472 states have call successors, (3472) [2023-12-02 08:26:11,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66981 states to 66981 states and 76500 transitions. [2023-12-02 08:26:11,532 INFO L78 Accepts]: Start accepts. Automaton has 66981 states and 76500 transitions. Word has length 486 [2023-12-02 08:26:11,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:26:11,532 INFO L495 AbstractCegarLoop]: Abstraction has 66981 states and 76500 transitions. [2023-12-02 08:26:11,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 17.51063829787234) internal successors, (823), 48 states have internal predecessors, (823), 47 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) [2023-12-02 08:26:11,533 INFO L276 IsEmpty]: Start isEmpty. Operand 66981 states and 76500 transitions. [2023-12-02 08:26:11,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2023-12-02 08:26:11,541 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:26:11,541 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 22, 22, 22, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:26:11,546 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2023-12-02 08:26:11,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-12-02 08:26:11,742 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:26:11,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:26:11,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1306025598, now seen corresponding path program 4 times [2023-12-02 08:26:11,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:26:11,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369017142] [2023-12-02 08:26:11,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:26:11,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:26:11,757 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:26:11,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [393611264] [2023-12-02 08:26:11,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 08:26:11,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:26:11,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:26:11,758 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:26:11,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-12-02 08:26:11,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:26:11,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 869 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 08:26:11,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:26:12,368 INFO L134 CoverageAnalysis]: Checked inductivity of 5271 backedges. 0 proven. 4763 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2023-12-02 08:26:12,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:26:13,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5271 backedges. 0 proven. 4763 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2023-12-02 08:26:13,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:26:13,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369017142] [2023-12-02 08:26:13,259 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:26:13,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393611264] [2023-12-02 08:26:13,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393611264] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:26:13,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [231159302] [2023-12-02 08:26:13,260 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-12-02 08:26:13,260 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:26:13,260 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:26:13,260 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:26:13,260 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:26:14,152 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2023-12-02 08:26:14,159 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:26:14,178 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:26:19,733 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1867950#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~x2~0#1| 1) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= 1 ~counter~0) (<= |ULTIMATE.start_main_~y3~0#1| 0) (not (= |ULTIMATE.start_main_~y3~0#1| 0)) (= 2147483647 |ULTIMATE.start_main_~y1~0#1|) (= (+ 2147483647 |ULTIMATE.start_main_~y3~0#1|) |ULTIMATE.start_main_~x1~0#1|))' at error location [2023-12-02 08:26:19,733 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:26:19,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:26:19,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2023-12-02 08:26:19,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398514594] [2023-12-02 08:26:19,733 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:26:19,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-12-02 08:26:19,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:26:19,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-12-02 08:26:19,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1217, Invalid=3475, Unknown=0, NotChecked=0, Total=4692 [2023-12-02 08:26:19,737 INFO L87 Difference]: Start difference. First operand 66981 states and 76500 transitions. Second operand has 48 states, 47 states have (on average 17.638297872340427) internal successors, (829), 48 states have internal predecessors, (829), 47 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) [2023-12-02 08:26:39,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:26:39,910 INFO L93 Difference]: Finished difference Result 152639 states and 176177 transitions. [2023-12-02 08:26:39,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-02 08:26:39,910 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 17.638297872340427) internal successors, (829), 48 states have internal predecessors, (829), 47 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) Word has length 489 [2023-12-02 08:26:39,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:26:40,094 INFO L225 Difference]: With dead ends: 152639 [2023-12-02 08:26:40,094 INFO L226 Difference]: Without dead ends: 152638 [2023-12-02 08:26:40,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1465 GetRequests, 1330 SyntacticMatches, 68 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6967 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1217, Invalid=3475, Unknown=0, NotChecked=0, Total=4692 [2023-12-02 08:26:40,111 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1633 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1633 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-12-02 08:26:40,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1633 Valid, 837 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-12-02 08:26:40,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152638 states. [2023-12-02 08:26:47,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152638 to 110277. [2023-12-02 08:26:47,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110277 states, 104431 states have (on average 1.1137305972364528) internal successors, (116308), 104454 states have internal predecessors, (116308), 5752 states have call successors, (5752), 88 states have call predecessors, (5752), 88 states have return successors, (5752), 5734 states have call predecessors, (5752), 5752 states have call successors, (5752) [2023-12-02 08:26:47,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110277 states to 110277 states and 127812 transitions. [2023-12-02 08:26:47,798 INFO L78 Accepts]: Start accepts. Automaton has 110277 states and 127812 transitions. Word has length 489 [2023-12-02 08:26:47,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:26:47,798 INFO L495 AbstractCegarLoop]: Abstraction has 110277 states and 127812 transitions. [2023-12-02 08:26:47,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 17.638297872340427) internal successors, (829), 48 states have internal predecessors, (829), 47 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) [2023-12-02 08:26:47,798 INFO L276 IsEmpty]: Start isEmpty. Operand 110277 states and 127812 transitions. [2023-12-02 08:26:47,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2023-12-02 08:26:47,807 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:26:47,808 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 25, 25, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 20, 20, 20, 20, 20, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:26:47,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2023-12-02 08:26:48,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-12-02 08:26:48,008 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:26:48,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:26:48,008 INFO L85 PathProgramCache]: Analyzing trace with hash 949723989, now seen corresponding path program 17 times [2023-12-02 08:26:48,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:26:48,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908531789] [2023-12-02 08:26:48,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:26:48,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:26:48,024 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:26:48,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1561743630] [2023-12-02 08:26:48,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 08:26:48,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:26:48,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:26:48,026 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:26:48,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-12-02 08:26:48,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-12-02 08:26:48,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:26:48,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-02 08:26:48,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:26:58,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5622 backedges. 2128 proven. 334 refuted. 0 times theorem prover too weak. 3160 trivial. 0 not checked. [2023-12-02 08:26:58,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:26:59,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:26:59,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908531789] [2023-12-02 08:26:59,815 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:26:59,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561743630] [2023-12-02 08:26:59,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561743630] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:26:59,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [722785462] [2023-12-02 08:26:59,817 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 08:26:59,817 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:26:59,817 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:26:59,817 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:26:59,818 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:27:00,800 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:27:00,808 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:27:00,828 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:27:13,038 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2160335#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 1 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= ~counter~0 100) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 08:27:13,038 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:27:13,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:27:13,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-12-02 08:27:13,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758434055] [2023-12-02 08:27:13,039 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 08:27:13,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-02 08:27:13,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:27:13,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-02 08:27:13,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=2415, Unknown=7, NotChecked=0, Total=2652 [2023-12-02 08:27:13,040 INFO L87 Difference]: Start difference. First operand 110277 states and 127812 transitions. Second operand has 23 states, 20 states have (on average 7.55) internal successors, (151), 23 states have internal predecessors, (151), 8 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2023-12-02 08:27:17,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 08:27:19,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 08:27:33,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:27:33,504 INFO L93 Difference]: Finished difference Result 111298 states and 128917 transitions. [2023-12-02 08:27:33,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-12-02 08:27:33,504 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 7.55) internal successors, (151), 23 states have internal predecessors, (151), 8 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) Word has length 518 [2023-12-02 08:27:33,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:27:33,628 INFO L225 Difference]: With dead ends: 111298 [2023-12-02 08:27:33,628 INFO L226 Difference]: Without dead ends: 109504 [2023-12-02 08:27:33,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1081 GetRequests, 951 SyntacticMatches, 49 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4225 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=550, Invalid=6249, Unknown=7, NotChecked=0, Total=6806 [2023-12-02 08:27:33,641 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 300 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 3623 mSolverCounterSat, 26 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 3653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 3623 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2023-12-02 08:27:33,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 926 Invalid, 3653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 3623 Invalid, 4 Unknown, 0 Unchecked, 9.6s Time] [2023-12-02 08:27:33,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109504 states. [2023-12-02 08:27:40,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109504 to 104840. [2023-12-02 08:27:40,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104840 states, 99279 states have (on average 1.1140523172070629) internal successors, (110602), 99303 states have internal predecessors, (110602), 5467 states have call successors, (5467), 88 states have call predecessors, (5467), 88 states have return successors, (5467), 5448 states have call predecessors, (5467), 5467 states have call successors, (5467) [2023-12-02 08:27:40,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104840 states to 104840 states and 121536 transitions. [2023-12-02 08:27:40,844 INFO L78 Accepts]: Start accepts. Automaton has 104840 states and 121536 transitions. Word has length 518 [2023-12-02 08:27:40,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:27:40,844 INFO L495 AbstractCegarLoop]: Abstraction has 104840 states and 121536 transitions. [2023-12-02 08:27:40,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 7.55) internal successors, (151), 23 states have internal predecessors, (151), 8 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2023-12-02 08:27:40,844 INFO L276 IsEmpty]: Start isEmpty. Operand 104840 states and 121536 transitions. [2023-12-02 08:27:40,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 582 [2023-12-02 08:27:40,857 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:27:40,857 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 28, 28, 28, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 18, 18, 18, 18, 18, 9, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:27:40,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2023-12-02 08:27:41,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-12-02 08:27:41,058 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:27:41,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:27:41,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1541141613, now seen corresponding path program 18 times [2023-12-02 08:27:41,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:27:41,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437669088] [2023-12-02 08:27:41,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:27:41,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:27:41,075 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:27:41,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [775176153] [2023-12-02 08:27:41,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 08:27:41,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:27:41,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:27:41,076 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:27:41,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-12-02 08:27:41,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 08:27:41,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:27:41,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 976 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 08:27:41,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:27:42,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6887 backedges. 0 proven. 5791 refuted. 0 times theorem prover too weak. 1096 trivial. 0 not checked. [2023-12-02 08:27:42,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:27:42,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:27:42,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437669088] [2023-12-02 08:27:42,531 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:27:42,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775176153] [2023-12-02 08:27:42,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775176153] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:27:42,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1237499830] [2023-12-02 08:27:42,532 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 08:27:42,532 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:27:42,532 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:27:42,532 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:27:42,533 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:27:43,279 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:27:43,287 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:27:43,306 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:27:48,312 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2401316#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 1 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= ~counter~0 100) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 08:27:48,312 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:27:48,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:27:48,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-12-02 08:27:48,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069310] [2023-12-02 08:27:48,313 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 08:27:48,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 08:27:48,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:27:48,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 08:27:48,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1507, Unknown=0, NotChecked=0, Total=1722 [2023-12-02 08:27:48,314 INFO L87 Difference]: Start difference. First operand 104840 states and 121536 transitions. Second operand has 15 states, 14 states have (on average 17.714285714285715) internal successors, (248), 15 states have internal predecessors, (248), 12 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2023-12-02 08:27:55,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:27:55,030 INFO L93 Difference]: Finished difference Result 104841 states and 121536 transitions. [2023-12-02 08:27:55,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 08:27:55,030 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 17.714285714285715) internal successors, (248), 15 states have internal predecessors, (248), 12 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) Word has length 581 [2023-12-02 08:27:55,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:27:55,155 INFO L225 Difference]: With dead ends: 104841 [2023-12-02 08:27:55,155 INFO L226 Difference]: Without dead ends: 104840 [2023-12-02 08:27:55,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1177 GetRequests, 1081 SyntacticMatches, 55 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2014 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=230, Invalid=1576, Unknown=0, NotChecked=0, Total=1806 [2023-12-02 08:27:55,173 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 23 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 08:27:55,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 396 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 08:27:55,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104840 states. [2023-12-02 08:28:02,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104840 to 104840. [2023-12-02 08:28:02,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104840 states, 99279 states have (on average 1.1140422445834466) internal successors, (110601), 99303 states have internal predecessors, (110601), 5467 states have call successors, (5467), 88 states have call predecessors, (5467), 88 states have return successors, (5467), 5448 states have call predecessors, (5467), 5467 states have call successors, (5467) [2023-12-02 08:28:02,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104840 states to 104840 states and 121535 transitions. [2023-12-02 08:28:02,301 INFO L78 Accepts]: Start accepts. Automaton has 104840 states and 121535 transitions. Word has length 581 [2023-12-02 08:28:02,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:28:02,301 INFO L495 AbstractCegarLoop]: Abstraction has 104840 states and 121535 transitions. [2023-12-02 08:28:02,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 17.714285714285715) internal successors, (248), 15 states have internal predecessors, (248), 12 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2023-12-02 08:28:02,302 INFO L276 IsEmpty]: Start isEmpty. Operand 104840 states and 121535 transitions. [2023-12-02 08:28:02,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 603 [2023-12-02 08:28:02,315 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:28:02,316 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 29, 29, 29, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 25, 25, 25, 25, 25, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:28:02,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2023-12-02 08:28:02,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-12-02 08:28:02,516 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:28:02,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:28:02,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1187289377, now seen corresponding path program 19 times [2023-12-02 08:28:02,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:28:02,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578131135] [2023-12-02 08:28:02,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:28:02,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:28:02,534 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:28:02,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1754143574] [2023-12-02 08:28:02,535 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 08:28:02,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:28:02,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:28:02,536 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:28:02,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-12-02 08:28:02,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:28:02,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 991 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 08:28:02,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:28:03,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7808 backedges. 4562 proven. 2252 refuted. 0 times theorem prover too weak. 994 trivial. 0 not checked. [2023-12-02 08:28:03,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:28:03,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7808 backedges. 4242 proven. 2252 refuted. 0 times theorem prover too weak. 1314 trivial. 0 not checked. [2023-12-02 08:28:03,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:28:03,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578131135] [2023-12-02 08:28:03,941 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:28:03,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754143574] [2023-12-02 08:28:03,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754143574] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:28:03,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1909186104] [2023-12-02 08:28:03,943 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 08:28:03,943 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:28:03,943 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:28:03,943 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:28:03,943 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:28:04,679 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:28:04,687 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:28:04,707 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:28:09,709 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2636929#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 1 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= ~counter~0 100) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 08:28:09,709 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:28:09,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:28:09,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 35 [2023-12-02 08:28:09,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077581114] [2023-12-02 08:28:09,709 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:28:09,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-02 08:28:09,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:28:09,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-02 08:28:09,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=3055, Unknown=0, NotChecked=0, Total=3540 [2023-12-02 08:28:09,711 INFO L87 Difference]: Start difference. First operand 104840 states and 121535 transitions. Second operand has 35 states, 35 states have (on average 16.714285714285715) internal successors, (585), 35 states have internal predecessors, (585), 33 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (35), 33 states have call predecessors, (35), 33 states have call successors, (35) [2023-12-02 08:28:20,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:28:20,365 INFO L93 Difference]: Finished difference Result 213441 states and 251124 transitions. [2023-12-02 08:28:20,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-02 08:28:20,366 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 16.714285714285715) internal successors, (585), 35 states have internal predecessors, (585), 33 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (35), 33 states have call predecessors, (35), 33 states have call successors, (35) Word has length 602 [2023-12-02 08:28:20,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:28:20,527 INFO L225 Difference]: With dead ends: 213441 [2023-12-02 08:28:20,527 INFO L226 Difference]: Without dead ends: 136385 [2023-12-02 08:28:20,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1828 GetRequests, 1680 SyntacticMatches, 66 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6216 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=977, Invalid=5995, Unknown=0, NotChecked=0, Total=6972 [2023-12-02 08:28:20,576 INFO L413 NwaCegarLoop]: 401 mSDtfsCounter, 879 mSDsluCounter, 2163 mSDsCounter, 0 mSdLazyCounter, 3669 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 879 SdHoareTripleChecker+Valid, 2564 SdHoareTripleChecker+Invalid, 3684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 3669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-02 08:28:20,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [879 Valid, 2564 Invalid, 3684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 3669 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-02 08:28:20,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136385 states. [2023-12-02 08:28:28,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136385 to 104726. [2023-12-02 08:28:28,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104726 states, 99145 states have (on average 1.1171718190529023) internal successors, (110762), 99164 states have internal predecessors, (110762), 5487 states have call successors, (5487), 88 states have call predecessors, (5487), 88 states have return successors, (5487), 5473 states have call predecessors, (5487), 5487 states have call successors, (5487) [2023-12-02 08:28:28,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104726 states to 104726 states and 121736 transitions. [2023-12-02 08:28:28,304 INFO L78 Accepts]: Start accepts. Automaton has 104726 states and 121736 transitions. Word has length 602 [2023-12-02 08:28:28,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:28:28,305 INFO L495 AbstractCegarLoop]: Abstraction has 104726 states and 121736 transitions. [2023-12-02 08:28:28,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 16.714285714285715) internal successors, (585), 35 states have internal predecessors, (585), 33 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (35), 33 states have call predecessors, (35), 33 states have call successors, (35) [2023-12-02 08:28:28,305 INFO L276 IsEmpty]: Start isEmpty. Operand 104726 states and 121736 transitions. [2023-12-02 08:28:28,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 645 [2023-12-02 08:28:28,321 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:28:28,322 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 31, 31, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 24, 24, 24, 24, 24, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:28:28,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2023-12-02 08:28:28,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-12-02 08:28:28,522 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:28:28,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:28:28,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1555740291, now seen corresponding path program 20 times [2023-12-02 08:28:28,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:28:28,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211583090] [2023-12-02 08:28:28,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:28:28,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:28:28,541 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:28:28,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808082259] [2023-12-02 08:28:28,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 08:28:28,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:28:28,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:28:28,542 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:28:28,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-12-02 08:28:28,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-12-02 08:28:28,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:28:28,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-02 08:28:28,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:28:29,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8741 backedges. 2504 proven. 233 refuted. 0 times theorem prover too weak. 6004 trivial. 0 not checked. [2023-12-02 08:28:29,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:28:29,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:28:29,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211583090] [2023-12-02 08:28:29,874 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:28:29,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808082259] [2023-12-02 08:28:29,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808082259] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:28:29,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [534923046] [2023-12-02 08:28:29,875 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 08:28:29,875 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:28:29,876 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:28:29,876 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:28:29,876 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:28:30,802 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:28:30,809 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:28:30,829 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:28:37,055 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2990840#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 1 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= ~counter~0 100) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 08:28:37,055 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:28:37,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:28:37,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-12-02 08:28:37,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333581594] [2023-12-02 08:28:37,056 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 08:28:37,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 08:28:37,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:28:37,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 08:28:37,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1888, Unknown=0, NotChecked=0, Total=2070 [2023-12-02 08:28:37,057 INFO L87 Difference]: Start difference. First operand 104726 states and 121736 transitions. Second operand has 18 states, 16 states have (on average 8.25) internal successors, (132), 18 states have internal predecessors, (132), 6 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2023-12-02 08:28:46,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:28:46,339 INFO L93 Difference]: Finished difference Result 104779 states and 121770 transitions. [2023-12-02 08:28:46,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-12-02 08:28:46,339 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 8.25) internal successors, (132), 18 states have internal predecessors, (132), 6 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 644 [2023-12-02 08:28:46,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:28:46,457 INFO L225 Difference]: With dead ends: 104779 [2023-12-02 08:28:46,457 INFO L226 Difference]: Without dead ends: 104760 [2023-12-02 08:28:46,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1337 GetRequests, 1207 SyntacticMatches, 61 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3052 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=389, Invalid=4581, Unknown=0, NotChecked=0, Total=4970 [2023-12-02 08:28:46,471 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 232 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 2457 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 2478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-02 08:28:46,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 803 Invalid, 2478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2457 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-02 08:28:46,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104760 states. [2023-12-02 08:28:53,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104760 to 100989. [2023-12-02 08:28:53,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100989 states, 95605 states have (on average 1.1172742011401078) internal successors, (106817), 95624 states have internal predecessors, (106817), 5290 states have call successors, (5290), 88 states have call predecessors, (5290), 88 states have return successors, (5290), 5276 states have call predecessors, (5290), 5290 states have call successors, (5290) [2023-12-02 08:28:53,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100989 states to 100989 states and 117397 transitions. [2023-12-02 08:28:53,786 INFO L78 Accepts]: Start accepts. Automaton has 100989 states and 117397 transitions. Word has length 644 [2023-12-02 08:28:53,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:28:53,787 INFO L495 AbstractCegarLoop]: Abstraction has 100989 states and 117397 transitions. [2023-12-02 08:28:53,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 8.25) internal successors, (132), 18 states have internal predecessors, (132), 6 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2023-12-02 08:28:53,787 INFO L276 IsEmpty]: Start isEmpty. Operand 100989 states and 117397 transitions. [2023-12-02 08:28:53,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 645 [2023-12-02 08:28:53,800 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:28:53,800 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 31, 31, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 20, 20, 20, 20, 20, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:28:53,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2023-12-02 08:28:54,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:28:54,000 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:28:54,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:28:54,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1058479747, now seen corresponding path program 21 times [2023-12-02 08:28:54,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:28:54,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972327051] [2023-12-02 08:28:54,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:28:54,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:28:54,020 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:28:54,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1430178640] [2023-12-02 08:28:54,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 08:28:54,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:28:54,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:28:54,021 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:28:54,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-12-02 08:28:54,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 08:28:54,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:28:54,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 1078 conjuncts, 62 conjunts are in the unsatisfiable core [2023-12-02 08:28:54,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:28:56,045 INFO L134 CoverageAnalysis]: Checked inductivity of 8517 backedges. 73 proven. 7378 refuted. 0 times theorem prover too weak. 1066 trivial. 0 not checked. [2023-12-02 08:28:56,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:28:56,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:28:56,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972327051] [2023-12-02 08:28:56,160 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:28:56,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430178640] [2023-12-02 08:28:56,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430178640] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:28:56,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [974218120] [2023-12-02 08:28:56,162 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 08:28:56,162 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:28:56,162 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:28:56,162 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:28:56,162 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:28:57,167 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:28:57,178 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:28:57,209 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:29:03,952 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3220523#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 1 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= ~counter~0 100) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 08:29:03,952 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:29:03,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:29:03,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2023-12-02 08:29:03,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469961081] [2023-12-02 08:29:03,952 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 08:29:03,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-02 08:29:03,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:29:03,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-02 08:29:03,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=2564, Unknown=0, NotChecked=0, Total=2862 [2023-12-02 08:29:03,954 INFO L87 Difference]: Start difference. First operand 100989 states and 117397 transitions. Second operand has 27 states, 25 states have (on average 14.48) internal successors, (362), 27 states have internal predecessors, (362), 19 states have call successors, (20), 1 states have call predecessors, (20), 2 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2023-12-02 08:29:11,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:29:11,918 INFO L93 Difference]: Finished difference Result 101006 states and 117407 transitions. [2023-12-02 08:29:11,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-02 08:29:11,919 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 14.48) internal successors, (362), 27 states have internal predecessors, (362), 19 states have call successors, (20), 1 states have call predecessors, (20), 2 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) Word has length 644 [2023-12-02 08:29:11,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:29:12,028 INFO L225 Difference]: With dead ends: 101006 [2023-12-02 08:29:12,029 INFO L226 Difference]: Without dead ends: 101005 [2023-12-02 08:29:12,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1314 GetRequests, 1189 SyntacticMatches, 61 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2895 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=453, Invalid=3837, Unknown=0, NotChecked=0, Total=4290 [2023-12-02 08:29:12,044 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 81 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 1888 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 1893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 08:29:12,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 811 Invalid, 1893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1888 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 08:29:12,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101005 states. [2023-12-02 08:29:19,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101005 to 100989. [2023-12-02 08:29:19,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100989 states, 95605 states have (on average 1.1172637414361173) internal successors, (106816), 95624 states have internal predecessors, (106816), 5290 states have call successors, (5290), 88 states have call predecessors, (5290), 88 states have return successors, (5290), 5276 states have call predecessors, (5290), 5290 states have call successors, (5290) [2023-12-02 08:29:19,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100989 states to 100989 states and 117396 transitions. [2023-12-02 08:29:19,573 INFO L78 Accepts]: Start accepts. Automaton has 100989 states and 117396 transitions. Word has length 644 [2023-12-02 08:29:19,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:29:19,574 INFO L495 AbstractCegarLoop]: Abstraction has 100989 states and 117396 transitions. [2023-12-02 08:29:19,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 14.48) internal successors, (362), 27 states have internal predecessors, (362), 19 states have call successors, (20), 1 states have call predecessors, (20), 2 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2023-12-02 08:29:19,574 INFO L276 IsEmpty]: Start isEmpty. Operand 100989 states and 117396 transitions. [2023-12-02 08:29:19,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 668 [2023-12-02 08:29:19,588 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:29:19,588 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 31, 31, 31, 31, 31, 31, 31, 31, 31, 30, 30, 30, 30, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:29:19,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2023-12-02 08:29:19,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:29:19,788 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:29:19,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:29:19,789 INFO L85 PathProgramCache]: Analyzing trace with hash -742009585, now seen corresponding path program 8 times [2023-12-02 08:29:19,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:29:19,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268297681] [2023-12-02 08:29:19,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:29:19,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:29:19,808 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:29:19,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1840969242] [2023-12-02 08:29:19,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 08:29:19,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:29:19,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:29:19,809 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:29:19,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-12-02 08:29:20,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2023-12-02 08:29:20,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:29:20,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-02 08:29:20,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:29:21,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9895 backedges. 30 proven. 8963 refuted. 0 times theorem prover too weak. 902 trivial. 0 not checked. [2023-12-02 08:29:21,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:29:23,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9895 backedges. 30 proven. 8963 refuted. 0 times theorem prover too weak. 902 trivial. 0 not checked. [2023-12-02 08:29:23,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:29:23,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268297681] [2023-12-02 08:29:23,097 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:29:23,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840969242] [2023-12-02 08:29:23,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840969242] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:29:23,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [7076765] [2023-12-02 08:29:23,098 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 08:29:23,098 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:29:23,098 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:29:23,098 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:29:23,099 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:29:24,018 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:29:24,026 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:29:24,046 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:29:31,146 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3448068#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= 1 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (+ (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) |ULTIMATE.start_main_~y2~0#1|)))' at error location [2023-12-02 08:29:31,146 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:29:31,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:29:31,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2023-12-02 08:29:31,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227048629] [2023-12-02 08:29:31,146 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:29:31,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-12-02 08:29:31,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:29:31,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-12-02 08:29:31,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=6595, Unknown=0, NotChecked=0, Total=8742 [2023-12-02 08:29:31,150 INFO L87 Difference]: Start difference. First operand 100989 states and 117396 transitions. Second operand has 69 states, 67 states have (on average 16.98507462686567) internal successors, (1138), 69 states have internal predecessors, (1138), 63 states have call successors, (64), 1 states have call predecessors, (64), 2 states have return successors, (64), 63 states have call predecessors, (64), 63 states have call successors, (64) [2023-12-02 08:29:56,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:29:56,775 INFO L93 Difference]: Finished difference Result 191308 states and 222453 transitions. [2023-12-02 08:29:56,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 221 states. [2023-12-02 08:29:56,776 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 67 states have (on average 16.98507462686567) internal successors, (1138), 69 states have internal predecessors, (1138), 63 states have call successors, (64), 1 states have call predecessors, (64), 2 states have return successors, (64), 63 states have call predecessors, (64), 63 states have call successors, (64) Word has length 667 [2023-12-02 08:29:56,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:29:56,997 INFO L225 Difference]: With dead ends: 191308 [2023-12-02 08:29:56,997 INFO L226 Difference]: Without dead ends: 191190 [2023-12-02 08:29:57,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2154 GetRequests, 1844 SyntacticMatches, 63 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28476 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=17307, Invalid=44445, Unknown=0, NotChecked=0, Total=61752 [2023-12-02 08:29:57,017 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 2389 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 1538 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2390 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 1815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 1538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-02 08:29:57,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2390 Valid, 433 Invalid, 1815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 1538 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-12-02 08:29:57,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191190 states. [2023-12-02 08:30:14,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191190 to 186788. [2023-12-02 08:30:14,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186788 states, 177044 states have (on average 1.0718578432480061) internal successors, (189766), 177052 states have internal predecessors, (189766), 9650 states have call successors, (9650), 88 states have call predecessors, (9650), 88 states have return successors, (9650), 9647 states have call predecessors, (9650), 9650 states have call successors, (9650) [2023-12-02 08:30:14,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186788 states to 186788 states and 209066 transitions. [2023-12-02 08:30:14,636 INFO L78 Accepts]: Start accepts. Automaton has 186788 states and 209066 transitions. Word has length 667 [2023-12-02 08:30:14,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:30:14,636 INFO L495 AbstractCegarLoop]: Abstraction has 186788 states and 209066 transitions. [2023-12-02 08:30:14,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 67 states have (on average 16.98507462686567) internal successors, (1138), 69 states have internal predecessors, (1138), 63 states have call successors, (64), 1 states have call predecessors, (64), 2 states have return successors, (64), 63 states have call predecessors, (64), 63 states have call successors, (64) [2023-12-02 08:30:14,637 INFO L276 IsEmpty]: Start isEmpty. Operand 186788 states and 209066 transitions. [2023-12-02 08:30:14,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 687 [2023-12-02 08:30:14,651 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:30:14,651 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 33, 33, 33, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 28, 28, 28, 28, 28, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:30:14,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2023-12-02 08:30:14,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:30:14,852 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:30:14,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:30:14,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1821093717, now seen corresponding path program 22 times [2023-12-02 08:30:14,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:30:14,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651364933] [2023-12-02 08:30:14,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:30:14,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:30:15,052 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:30:15,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1731694001] [2023-12-02 08:30:15,052 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 08:30:15,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:30:15,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:30:15,054 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:30:15,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-12-02 08:30:15,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:30:15,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 1126 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 08:30:15,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:30:16,814 INFO L134 CoverageAnalysis]: Checked inductivity of 10162 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 2506 trivial. 0 not checked. [2023-12-02 08:30:16,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:30:16,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:30:16,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651364933] [2023-12-02 08:30:16,932 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:30:16,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731694001] [2023-12-02 08:30:16,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731694001] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:30:16,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1919934827] [2023-12-02 08:30:16,934 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 08:30:16,934 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:30:16,934 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:30:16,934 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:30:16,934 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:30:17,698 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:30:17,706 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:30:17,726 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:30:24,016 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3868393#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 4611686014132420609)) (<= 1 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= ~counter~0 100) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 08:30:24,016 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:30:24,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:30:24,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-12-02 08:30:24,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981256480] [2023-12-02 08:30:24,016 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 08:30:24,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 08:30:24,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:30:24,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 08:30:24,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1547, Unknown=0, NotChecked=0, Total=1722 [2023-12-02 08:30:24,018 INFO L87 Difference]: Start difference. First operand 186788 states and 209066 transitions. Second operand has 15 states, 14 states have (on average 15.928571428571429) internal successors, (223), 15 states have internal predecessors, (223), 12 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2023-12-02 08:30:40,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:30:40,689 INFO L93 Difference]: Finished difference Result 187918 states and 210303 transitions. [2023-12-02 08:30:40,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 08:30:40,689 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 15.928571428571429) internal successors, (223), 15 states have internal predecessors, (223), 12 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) Word has length 686 [2023-12-02 08:30:40,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:30:40,882 INFO L225 Difference]: With dead ends: 187918 [2023-12-02 08:30:40,882 INFO L226 Difference]: Without dead ends: 187917 [2023-12-02 08:30:40,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1387 GetRequests, 1281 SyntacticMatches, 65 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1889 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2023-12-02 08:30:40,899 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 76 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 1472 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 1472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 08:30:40,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 830 Invalid, 1472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1472 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 08:30:40,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187917 states. [2023-12-02 08:30:58,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187917 to 186788. [2023-12-02 08:30:58,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186788 states, 177044 states have (on average 1.0718521949345925) internal successors, (189765), 177052 states have internal predecessors, (189765), 9650 states have call successors, (9650), 88 states have call predecessors, (9650), 88 states have return successors, (9650), 9647 states have call predecessors, (9650), 9650 states have call successors, (9650) [2023-12-02 08:30:58,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186788 states to 186788 states and 209065 transitions. [2023-12-02 08:30:58,940 INFO L78 Accepts]: Start accepts. Automaton has 186788 states and 209065 transitions. Word has length 686 [2023-12-02 08:30:58,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:30:58,941 INFO L495 AbstractCegarLoop]: Abstraction has 186788 states and 209065 transitions. [2023-12-02 08:30:58,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 15.928571428571429) internal successors, (223), 15 states have internal predecessors, (223), 12 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2023-12-02 08:30:58,941 INFO L276 IsEmpty]: Start isEmpty. Operand 186788 states and 209065 transitions. [2023-12-02 08:30:58,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 708 [2023-12-02 08:30:58,966 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:30:58,966 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 34, 34, 34, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 22, 22, 22, 22, 22, 11, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:30:58,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2023-12-02 08:30:59,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:30:59,167 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:30:59,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:30:59,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1593666963, now seen corresponding path program 23 times [2023-12-02 08:30:59,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:30:59,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844847267] [2023-12-02 08:30:59,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:30:59,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:30:59,188 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:30:59,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1564150820] [2023-12-02 08:30:59,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 08:30:59,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:30:59,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:30:59,189 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:30:59,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-12-02 08:30:59,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 08:30:59,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:30:59,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 08:30:59,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:31:00,610 INFO L134 CoverageAnalysis]: Checked inductivity of 10320 backedges. 1746 proven. 69 refuted. 0 times theorem prover too weak. 8505 trivial. 0 not checked. [2023-12-02 08:31:00,610 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:31:01,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:31:01,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844847267] [2023-12-02 08:31:01,385 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:31:01,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564150820] [2023-12-02 08:31:01,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564150820] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:31:01,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1976573272] [2023-12-02 08:31:01,386 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 08:31:01,386 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:31:01,387 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:31:01,387 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:31:01,387 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:31:02,492 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:31:02,501 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:31:02,522 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:31:09,648 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4284821#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 1 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= ~counter~0 100) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 08:31:09,648 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:31:09,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:31:09,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2023-12-02 08:31:09,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648046624] [2023-12-02 08:31:09,648 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 08:31:09,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 08:31:09,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:31:09,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 08:31:09,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1287, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 08:31:09,649 INFO L87 Difference]: Start difference. First operand 186788 states and 209065 transitions. Second operand has 9 states, 8 states have (on average 11.25) internal successors, (90), 9 states have internal predecessors, (90), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-02 08:31:26,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:31:26,320 INFO L93 Difference]: Finished difference Result 186819 states and 209083 transitions. [2023-12-02 08:31:26,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 08:31:26,321 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 11.25) internal successors, (90), 9 states have internal predecessors, (90), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 707 [2023-12-02 08:31:26,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:31:26,527 INFO L225 Difference]: With dead ends: 186819 [2023-12-02 08:31:26,527 INFO L226 Difference]: Without dead ends: 186808 [2023-12-02 08:31:26,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1453 GetRequests, 1345 SyntacticMatches, 67 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2187 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=234, Invalid=1572, Unknown=0, NotChecked=0, Total=1806 [2023-12-02 08:31:26,547 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 89 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 08:31:26,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 279 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 08:31:26,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186808 states. [2023-12-02 08:31:45,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186808 to 185354. [2023-12-02 08:31:45,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185354 states, 175686 states have (on average 1.0714171874822125) internal successors, (188233), 175694 states have internal predecessors, (188233), 9574 states have call successors, (9574), 88 states have call predecessors, (9574), 88 states have return successors, (9574), 9571 states have call predecessors, (9574), 9574 states have call successors, (9574) [2023-12-02 08:31:45,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185354 states to 185354 states and 207381 transitions. [2023-12-02 08:31:45,528 INFO L78 Accepts]: Start accepts. Automaton has 185354 states and 207381 transitions. Word has length 707 [2023-12-02 08:31:45,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:31:45,529 INFO L495 AbstractCegarLoop]: Abstraction has 185354 states and 207381 transitions. [2023-12-02 08:31:45,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 11.25) internal successors, (90), 9 states have internal predecessors, (90), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-02 08:31:45,529 INFO L276 IsEmpty]: Start isEmpty. Operand 185354 states and 207381 transitions. [2023-12-02 08:31:45,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 750 [2023-12-02 08:31:45,549 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:31:45,549 INFO L195 NwaCegarLoop]: trace histogram [36, 36, 36, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 33, 33, 33, 33, 33, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:31:45,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2023-12-02 08:31:45,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2023-12-02 08:31:45,750 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:31:45,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:31:45,750 INFO L85 PathProgramCache]: Analyzing trace with hash 87282625, now seen corresponding path program 2 times [2023-12-02 08:31:45,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:31:45,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199889263] [2023-12-02 08:31:45,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:31:45,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:31:45,772 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:31:45,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1134604606] [2023-12-02 08:31:45,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 08:31:45,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:31:45,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:31:45,773 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:31:45,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-12-02 08:31:45,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2023-12-02 08:31:45,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:31:45,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-02 08:31:45,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:31:47,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12373 backedges. 0 proven. 6462 refuted. 0 times theorem prover too weak. 5911 trivial. 0 not checked. [2023-12-02 08:31:47,063 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:31:47,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:31:47,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199889263] [2023-12-02 08:31:47,186 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:31:47,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134604606] [2023-12-02 08:31:47,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134604606] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:31:47,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1935084473] [2023-12-02 08:31:47,187 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2023-12-02 08:31:47,188 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:31:47,188 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:31:47,188 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:31:47,188 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:31:48,176 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:31:48,184 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:31:48,212 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:31:55,096 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4698526#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 101 ~counter~0) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= ~counter~0 2147483647) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 08:31:55,096 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:31:55,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:31:55,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-12-02 08:31:55,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027984998] [2023-12-02 08:31:55,096 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 08:31:55,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 08:31:55,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:31:55,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 08:31:55,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=2066, Unknown=0, NotChecked=0, Total=2256 [2023-12-02 08:31:55,098 INFO L87 Difference]: Start difference. First operand 185354 states and 207381 transitions. Second operand has 18 states, 17 states have (on average 14.647058823529411) internal successors, (249), 18 states have internal predecessors, (249), 14 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2023-12-02 08:32:14,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:32:14,489 INFO L93 Difference]: Finished difference Result 200362 states and 223674 transitions. [2023-12-02 08:32:14,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 08:32:14,490 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 14.647058823529411) internal successors, (249), 18 states have internal predecessors, (249), 14 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 749 [2023-12-02 08:32:14,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:32:14,762 INFO L225 Difference]: With dead ends: 200362 [2023-12-02 08:32:14,763 INFO L226 Difference]: Without dead ends: 200358 [2023-12-02 08:32:14,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1513 GetRequests, 1395 SyntacticMatches, 71 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1707 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=199, Invalid=2153, Unknown=0, NotChecked=0, Total=2352 [2023-12-02 08:32:14,784 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 115 mSDsluCounter, 1991 mSDsCounter, 0 mSdLazyCounter, 4455 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 2155 SdHoareTripleChecker+Invalid, 4456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-02 08:32:14,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 2155 Invalid, 4456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4455 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-02 08:32:14,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200358 states. [2023-12-02 08:32:32,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200358 to 185344. [2023-12-02 08:32:32,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185344 states, 175676 states have (on average 1.0714098681663973) internal successors, (188221), 175684 states have internal predecessors, (188221), 9574 states have call successors, (9574), 88 states have call predecessors, (9574), 88 states have return successors, (9574), 9571 states have call predecessors, (9574), 9574 states have call successors, (9574) [2023-12-02 08:32:33,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185344 states to 185344 states and 207369 transitions. [2023-12-02 08:32:33,009 INFO L78 Accepts]: Start accepts. Automaton has 185344 states and 207369 transitions. Word has length 749 [2023-12-02 08:32:33,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:32:33,009 INFO L495 AbstractCegarLoop]: Abstraction has 185344 states and 207369 transitions. [2023-12-02 08:32:33,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 14.647058823529411) internal successors, (249), 18 states have internal predecessors, (249), 14 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2023-12-02 08:32:33,010 INFO L276 IsEmpty]: Start isEmpty. Operand 185344 states and 207369 transitions. [2023-12-02 08:32:33,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 771 [2023-12-02 08:32:33,035 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:32:33,036 INFO L195 NwaCegarLoop]: trace histogram [37, 37, 37, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 34, 34, 34, 34, 34, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:32:33,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2023-12-02 08:32:33,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2023-12-02 08:32:33,236 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 08:32:33,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:32:33,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1711315685, now seen corresponding path program 3 times [2023-12-02 08:32:33,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:32:33,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965752648] [2023-12-02 08:32:33,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:32:33,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:32:33,267 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 08:32:33,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1896388985] [2023-12-02 08:32:33,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 08:32:33,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:32:33,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:32:33,268 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:32:33,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69a26062-190f-40a9-ac7a-15dd19c2f249/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-12-02 08:32:33,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 08:32:33,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:32:33,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 1252 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-02 08:32:33,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:32:34,948 INFO L134 CoverageAnalysis]: Checked inductivity of 13104 backedges. 4867 proven. 6975 refuted. 0 times theorem prover too weak. 1262 trivial. 0 not checked. [2023-12-02 08:32:34,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:32:36,127 INFO L134 CoverageAnalysis]: Checked inductivity of 13104 backedges. 4867 proven. 6975 refuted. 0 times theorem prover too weak. 1262 trivial. 0 not checked. [2023-12-02 08:32:36,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:32:36,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965752648] [2023-12-02 08:32:36,127 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 08:32:36,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896388985] [2023-12-02 08:32:36,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896388985] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:32:36,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [260581721] [2023-12-02 08:32:36,129 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2023-12-02 08:32:36,129 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:32:36,129 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:32:36,129 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:32:36,129 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:32:36,886 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 08:32:36,894 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 08:32:36,914 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:32:44,015 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5129525#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 101 ~counter~0) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= ~counter~0 2147483647) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 08:32:44,015 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:32:44,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 08:32:44,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 62 [2023-12-02 08:32:44,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333074913] [2023-12-02 08:32:44,016 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 08:32:44,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-12-02 08:32:44,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:32:44,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-12-02 08:32:44,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1279, Invalid=6553, Unknown=0, NotChecked=0, Total=7832 [2023-12-02 08:32:44,019 INFO L87 Difference]: Start difference. First operand 185344 states and 207369 transitions. Second operand has 62 states, 62 states have (on average 17.032258064516128) internal successors, (1056), 62 states have internal predecessors, (1056), 59 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 59 states have call predecessors, (60), 59 states have call successors, (60) [2023-12-02 08:33:09,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 08:33:19,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:33:19,696 INFO L93 Difference]: Finished difference Result 355741 states and 405340 transitions. [2023-12-02 08:33:19,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-12-02 08:33:19,697 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 17.032258064516128) internal successors, (1056), 62 states have internal predecessors, (1056), 59 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 59 states have call predecessors, (60), 59 states have call successors, (60) Word has length 770 [2023-12-02 08:33:19,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:33:20,081 INFO L225 Difference]: With dead ends: 355741 [2023-12-02 08:33:20,081 INFO L226 Difference]: Without dead ends: 284019 [2023-12-02 08:33:20,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2354 GetRequests, 2134 SyntacticMatches, 87 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14503 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=3026, Invalid=15064, Unknown=0, NotChecked=0, Total=18090 [2023-12-02 08:33:20,137 INFO L413 NwaCegarLoop]: 768 mSDtfsCounter, 1655 mSDsluCounter, 6086 mSDsCounter, 0 mSdLazyCounter, 9814 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1655 SdHoareTripleChecker+Valid, 6854 SdHoareTripleChecker+Invalid, 9841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 9814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:33:20,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1655 Valid, 6854 Invalid, 9841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 9814 Invalid, 0 Unknown, 0 Unchecked, 11.1s Time] [2023-12-02 08:33:20,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284019 states.