./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e587d407128aaafd417211e5ccf66790913a0bc1afeba03ae0cdb578f5831614 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 03:29:21,186 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:29:21,190 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:29:21,251 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:29:21,251 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:29:21,257 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:29:21,259 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:29:21,263 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:29:21,266 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:29:21,272 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:29:21,273 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:29:21,276 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:29:21,277 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:29:21,280 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:29:21,282 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:29:21,284 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:29:21,286 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:29:21,287 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:29:21,289 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:29:21,298 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:29:21,299 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:29:21,301 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:29:21,305 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:29:21,306 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:29:21,316 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:29:21,316 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:29:21,317 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:29:21,320 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:29:21,320 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:29:21,323 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:29:21,323 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:29:21,325 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:29:21,328 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:29:21,330 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:29:21,331 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:29:21,331 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:29:21,332 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:29:21,332 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:29:21,333 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:29:21,334 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:29:21,335 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:29:21,336 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:29:21,375 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:29:21,376 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:29:21,376 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:29:21,377 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:29:21,378 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:29:21,378 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:29:21,378 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:29:21,378 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:29:21,379 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:29:21,379 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:29:21,379 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:29:21,380 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:29:21,380 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:29:21,380 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:29:21,380 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:29:21,381 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:29:21,381 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:29:21,381 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:29:21,382 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:29:21,382 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:29:21,383 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:29:21,383 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:29:21,383 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:29:21,384 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:29:21,384 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:29:21,384 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:29:21,384 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:29:21,385 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:29:21,385 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:29:21,385 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:29:21,385 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:29:21,386 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:29:21,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:29:21,386 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:29:21,387 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:29:21,387 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:29:21,387 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:29:21,387 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:29:21,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:29:21,388 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:29:21,388 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:29:21,388 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e587d407128aaafd417211e5ccf66790913a0bc1afeba03ae0cdb578f5831614 [2022-11-03 03:29:21,779 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:29:21,806 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:29:21,810 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:29:21,811 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:29:21,812 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:29:21,814 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c [2022-11-03 03:29:21,897 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/data/29ad7e51b/e02efe6833274ea7b8780758a7081d58/FLAG9657e1964 [2022-11-03 03:29:22,516 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:29:22,517 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c [2022-11-03 03:29:22,526 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/data/29ad7e51b/e02efe6833274ea7b8780758a7081d58/FLAG9657e1964 [2022-11-03 03:29:22,844 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/data/29ad7e51b/e02efe6833274ea7b8780758a7081d58 [2022-11-03 03:29:22,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:29:22,849 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:29:22,851 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:29:22,852 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:29:22,859 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:29:22,861 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:29:22" (1/1) ... [2022-11-03 03:29:22,862 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22ee78db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:22, skipping insertion in model container [2022-11-03 03:29:22,865 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:29:22" (1/1) ... [2022-11-03 03:29:22,875 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:29:22,901 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:29:23,130 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c[490,503] [2022-11-03 03:29:23,174 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:29:23,185 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:29:23,202 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c[490,503] [2022-11-03 03:29:23,215 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:29:23,232 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:29:23,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:23 WrapperNode [2022-11-03 03:29:23,233 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:29:23,235 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:29:23,235 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:29:23,236 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:29:23,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:23" (1/1) ... [2022-11-03 03:29:23,255 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:23" (1/1) ... [2022-11-03 03:29:23,279 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2022-11-03 03:29:23,280 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:29:23,281 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:29:23,281 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:29:23,281 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:29:23,293 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:23" (1/1) ... [2022-11-03 03:29:23,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:23" (1/1) ... [2022-11-03 03:29:23,295 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:23" (1/1) ... [2022-11-03 03:29:23,296 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:23" (1/1) ... [2022-11-03 03:29:23,300 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:23" (1/1) ... [2022-11-03 03:29:23,304 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:23" (1/1) ... [2022-11-03 03:29:23,306 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:23" (1/1) ... [2022-11-03 03:29:23,307 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:23" (1/1) ... [2022-11-03 03:29:23,310 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:29:23,311 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:29:23,311 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:29:23,311 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:29:23,313 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:23" (1/1) ... [2022-11-03 03:29:23,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:29:23,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:23,350 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:29:23,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:29:23,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:29:23,414 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 03:29:23,414 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 03:29:23,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:29:23,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:29:23,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:29:23,415 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 03:29:23,415 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 03:29:23,498 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:29:23,502 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:29:23,777 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:29:23,838 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:29:23,838 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 03:29:23,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:29:23 BoogieIcfgContainer [2022-11-03 03:29:23,842 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:29:23,844 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:29:23,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:29:23,854 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:29:23,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:29:22" (1/3) ... [2022-11-03 03:29:23,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e81b0e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:29:23, skipping insertion in model container [2022-11-03 03:29:23,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:23" (2/3) ... [2022-11-03 03:29:23,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e81b0e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:29:23, skipping insertion in model container [2022-11-03 03:29:23,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:29:23" (3/3) ... [2022-11-03 03:29:23,860 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound20.c [2022-11-03 03:29:23,888 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:29:23,888 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:29:23,985 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:29:24,000 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=LoopsAndPotentialCycles, 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;@97fbc50, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:29:24,000 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:29:24,005 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 16 states have internal predecessors, (20), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-03 03:29:24,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-03 03:29:24,017 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:24,019 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:24,020 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:24,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:24,030 INFO L85 PathProgramCache]: Analyzing trace with hash 966807424, now seen corresponding path program 1 times [2022-11-03 03:29:24,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:24,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970787685] [2022-11-03 03:29:24,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:24,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:24,182 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:29:24,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [34620589] [2022-11-03 03:29:24,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:24,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:24,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:24,189 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:24,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:29:24,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:24,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-03 03:29:24,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:24,349 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 03:29:24,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:24,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:24,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970787685] [2022-11-03 03:29:24,350 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:29:24,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34620589] [2022-11-03 03:29:24,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34620589] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:24,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:24,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:29:24,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807427567] [2022-11-03 03:29:24,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:24,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 03:29:24,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:24,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 03:29:24,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 03:29:24,400 INFO L87 Difference]: Start difference. First operand has 30 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 16 states have internal predecessors, (20), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-03 03:29:24,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:24,487 INFO L93 Difference]: Finished difference Result 49 states and 78 transitions. [2022-11-03 03:29:24,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 03:29:24,490 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 26 [2022-11-03 03:29:24,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:24,501 INFO L225 Difference]: With dead ends: 49 [2022-11-03 03:29:24,501 INFO L226 Difference]: Without dead ends: 28 [2022-11-03 03:29:24,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 03:29:24,516 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:24,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:29:24,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-03 03:29:24,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-03 03:29:24,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 15 states have internal predecessors, (16), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 03:29:24,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2022-11-03 03:29:24,591 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 39 transitions. Word has length 26 [2022-11-03 03:29:24,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:24,595 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 39 transitions. [2022-11-03 03:29:24,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-03 03:29:24,596 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 39 transitions. [2022-11-03 03:29:24,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 03:29:24,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:24,600 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:24,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:24,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:24,817 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:24,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:24,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1643993843, now seen corresponding path program 1 times [2022-11-03 03:29:24,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:24,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166171719] [2022-11-03 03:29:24,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:24,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:24,841 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:29:24,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1740836877] [2022-11-03 03:29:24,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:24,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:24,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:24,844 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:24,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:29:24,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:24,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:29:24,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:25,107 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 03:29:25,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:25,263 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 03:29:25,263 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:25,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166171719] [2022-11-03 03:29:25,264 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:29:25,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740836877] [2022-11-03 03:29:25,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740836877] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:25,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [947096801] [2022-11-03 03:29:25,301 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-03 03:29:25,305 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:29:25,311 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:29:25,326 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:29:25,337 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:29:26,804 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-03 03:29:26,838 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:29:28,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [947096801] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:28,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:29:28,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5, 5] total 14 [2022-11-03 03:29:28,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682328804] [2022-11-03 03:29:28,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:28,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 03:29:28,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:28,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 03:29:28,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-11-03 03:29:28,156 INFO L87 Difference]: Start difference. First operand 28 states and 39 transitions. Second operand has 11 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-03 03:29:28,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:28,493 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2022-11-03 03:29:28,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 03:29:28,495 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 27 [2022-11-03 03:29:28,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:28,496 INFO L225 Difference]: With dead ends: 38 [2022-11-03 03:29:28,496 INFO L226 Difference]: Without dead ends: 30 [2022-11-03 03:29:28,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 62 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-11-03 03:29:28,499 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 44 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:28,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 48 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:29:28,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-03 03:29:28,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-03 03:29:28,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 03:29:28,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2022-11-03 03:29:28,527 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 27 [2022-11-03 03:29:28,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:28,528 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2022-11-03 03:29:28,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-03 03:29:28,529 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2022-11-03 03:29:28,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-03 03:29:28,530 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:28,531 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:28,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:28,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-03 03:29:28,757 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:28,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:28,758 INFO L85 PathProgramCache]: Analyzing trace with hash -575116102, now seen corresponding path program 1 times [2022-11-03 03:29:28,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:28,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333462333] [2022-11-03 03:29:28,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:28,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:28,785 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:29:28,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [562015705] [2022-11-03 03:29:28,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:28,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:28,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:28,798 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:28,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:29:28,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:28,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:29:28,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:28,976 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 03:29:28,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:29,085 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 03:29:29,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:29,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333462333] [2022-11-03 03:29:29,085 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:29:29,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562015705] [2022-11-03 03:29:29,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562015705] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 03:29:29,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:29:29,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-11-03 03:29:29,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76575697] [2022-11-03 03:29:29,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:29,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:29:29,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:29,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:29:29,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:29:29,089 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-03 03:29:29,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:29,184 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-11-03 03:29:29,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:29:29,185 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 28 [2022-11-03 03:29:29,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:29,186 INFO L225 Difference]: With dead ends: 36 [2022-11-03 03:29:29,187 INFO L226 Difference]: Without dead ends: 34 [2022-11-03 03:29:29,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:29:29,188 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:29,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 102 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:29:29,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-03 03:29:29,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-11-03 03:29:29,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 03:29:29,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2022-11-03 03:29:29,211 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 28 [2022-11-03 03:29:29,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:29,212 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2022-11-03 03:29:29,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-03 03:29:29,212 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2022-11-03 03:29:29,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-03 03:29:29,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:29,214 INFO L195 NwaCegarLoop]: trace histogram [6, 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] [2022-11-03 03:29:29,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:29,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-03 03:29:29,429 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:29,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:29,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1810277145, now seen corresponding path program 1 times [2022-11-03 03:29:29,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:29,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866936054] [2022-11-03 03:29:29,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:29,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:29,447 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:29:29,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [134113176] [2022-11-03 03:29:29,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:29,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:29,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:29,449 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:29,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 03:29:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:29,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:29:29,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:29,612 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 03:29:29,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:29,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:29,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866936054] [2022-11-03 03:29:29,613 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:29:29,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134113176] [2022-11-03 03:29:29,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134113176] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:29,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:29,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:29:29,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41338576] [2022-11-03 03:29:29,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:29,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:29:29,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:29,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:29:29,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:29,617 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 03:29:29,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:29,711 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2022-11-03 03:29:29,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:29:29,712 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 33 [2022-11-03 03:29:29,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:29,714 INFO L225 Difference]: With dead ends: 47 [2022-11-03 03:29:29,714 INFO L226 Difference]: Without dead ends: 45 [2022-11-03 03:29:29,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:29:29,716 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:29,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 126 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:29:29,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-03 03:29:29,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-11-03 03:29:29,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-03 03:29:29,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 58 transitions. [2022-11-03 03:29:29,751 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 58 transitions. Word has length 33 [2022-11-03 03:29:29,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:29,751 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 58 transitions. [2022-11-03 03:29:29,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 03:29:29,752 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 58 transitions. [2022-11-03 03:29:29,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-03 03:29:29,754 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:29,754 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 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] [2022-11-03 03:29:29,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:29,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:29,978 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:29,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:29,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1313498982, now seen corresponding path program 1 times [2022-11-03 03:29:29,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:29,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471374204] [2022-11-03 03:29:29,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:29,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:30,010 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:29:30,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [400063243] [2022-11-03 03:29:30,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:30,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:30,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:30,014 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:30,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 03:29:30,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:30,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 03:29:30,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:30,294 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 03:29:30,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:30,441 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 03:29:30,441 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:30,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471374204] [2022-11-03 03:29:30,442 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:29:30,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400063243] [2022-11-03 03:29:30,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400063243] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 03:29:30,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:29:30,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-11-03 03:29:30,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892537129] [2022-11-03 03:29:30,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:30,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:29:30,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:30,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:29:30,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:29:30,446 INFO L87 Difference]: Start difference. First operand 44 states and 58 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 03:29:30,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:30,565 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2022-11-03 03:29:30,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:29:30,566 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 38 [2022-11-03 03:29:30,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:30,568 INFO L225 Difference]: With dead ends: 51 [2022-11-03 03:29:30,568 INFO L226 Difference]: Without dead ends: 49 [2022-11-03 03:29:30,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:29:30,570 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:30,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 114 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:29:30,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-03 03:29:30,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-11-03 03:29:30,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-03 03:29:30,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2022-11-03 03:29:30,598 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 38 [2022-11-03 03:29:30,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:30,599 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2022-11-03 03:29:30,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 03:29:30,599 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2022-11-03 03:29:30,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-03 03:29:30,600 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:30,601 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:30,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:30,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:30,814 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:30,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:30,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1793667961, now seen corresponding path program 1 times [2022-11-03 03:29:30,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:30,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093937885] [2022-11-03 03:29:30,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:30,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:30,837 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:29:30,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [856744608] [2022-11-03 03:29:30,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:30,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:30,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:30,861 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:30,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 03:29:30,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:30,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 03:29:30,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:31,381 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 03:29:31,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:31,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:31,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093937885] [2022-11-03 03:29:31,548 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:29:31,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856744608] [2022-11-03 03:29:31,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856744608] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:29:31,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1183337024] [2022-11-03 03:29:31,558 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-03 03:29:31,558 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:29:31,559 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:29:31,559 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:29:31,559 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:29:32,863 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2022-11-03 03:29:32,875 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-03 03:29:32,896 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:29:35,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1183337024] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:35,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:29:35,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [10] total 22 [2022-11-03 03:29:35,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283425441] [2022-11-03 03:29:35,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:35,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 03:29:35,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:35,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 03:29:35,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2022-11-03 03:29:35,365 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-03 03:29:35,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:35,904 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2022-11-03 03:29:35,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 03:29:35,905 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 43 [2022-11-03 03:29:35,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:35,909 INFO L225 Difference]: With dead ends: 73 [2022-11-03 03:29:35,909 INFO L226 Difference]: Without dead ends: 71 [2022-11-03 03:29:35,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 53 SyntacticMatches, 15 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2022-11-03 03:29:35,912 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 45 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:35,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 50 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:29:35,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-03 03:29:35,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2022-11-03 03:29:35,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 41 states have internal predecessors, (43), 20 states have call successors, (20), 9 states have call predecessors, (20), 9 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-03 03:29:35,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2022-11-03 03:29:35,978 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 43 [2022-11-03 03:29:35,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:35,978 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2022-11-03 03:29:35,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-03 03:29:35,981 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2022-11-03 03:29:35,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 03:29:35,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:35,989 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:36,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:36,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 03:29:36,217 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:36,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:36,217 INFO L85 PathProgramCache]: Analyzing trace with hash 434944611, now seen corresponding path program 1 times [2022-11-03 03:29:36,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:36,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196997618] [2022-11-03 03:29:36,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:36,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:36,233 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:29:36,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1165203113] [2022-11-03 03:29:36,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:36,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:36,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:36,235 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:36,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 03:29:36,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:36,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:29:36,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:36,370 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 03:29:36,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:36,462 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 03:29:36,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:36,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196997618] [2022-11-03 03:29:36,462 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:29:36,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165203113] [2022-11-03 03:29:36,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165203113] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:36,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1528054070] [2022-11-03 03:29:36,465 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-03 03:29:36,466 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:29:36,466 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:29:36,466 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:29:36,467 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:29:49,731 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-03 03:29:49,738 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-03 03:29:49,758 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:29:53,970 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2096#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:29:53,970 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:29:53,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:29:53,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-11-03 03:29:53,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589565604] [2022-11-03 03:29:53,971 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:29:53,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:29:53,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:53,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:29:53,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2022-11-03 03:29:53,973 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-03 03:29:54,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:54,369 INFO L93 Difference]: Finished difference Result 111 states and 148 transitions. [2022-11-03 03:29:54,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:29:54,369 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 52 [2022-11-03 03:29:54,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:54,379 INFO L225 Difference]: With dead ends: 111 [2022-11-03 03:29:54,379 INFO L226 Difference]: Without dead ends: 103 [2022-11-03 03:29:54,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 123 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2022-11-03 03:29:54,381 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 28 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:54,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 177 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:29:54,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-11-03 03:29:54,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2022-11-03 03:29:54,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 53 states have internal predecessors, (61), 32 states have call successors, (32), 9 states have call predecessors, (32), 9 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-03 03:29:54,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 124 transitions. [2022-11-03 03:29:54,413 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 124 transitions. Word has length 52 [2022-11-03 03:29:54,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:54,414 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 124 transitions. [2022-11-03 03:29:54,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-03 03:29:54,414 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 124 transitions. [2022-11-03 03:29:54,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-03 03:29:54,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:54,416 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:54,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:54,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:54,621 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:54,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:54,622 INFO L85 PathProgramCache]: Analyzing trace with hash -243308457, now seen corresponding path program 1 times [2022-11-03 03:29:54,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:54,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409416090] [2022-11-03 03:29:54,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:54,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:54,643 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:29:54,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1613534996] [2022-11-03 03:29:54,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:54,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:54,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:54,645 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:54,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 03:29:54,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:54,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 03:29:54,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:54,948 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-03 03:29:54,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:55,104 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-03 03:29:55,104 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:55,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409416090] [2022-11-03 03:29:55,105 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:29:55,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613534996] [2022-11-03 03:29:55,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613534996] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:55,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [897097136] [2022-11-03 03:29:55,108 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-03 03:29:55,108 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:29:55,108 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:29:55,109 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:29:55,109 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:30:06,341 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2022-11-03 03:30:06,351 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-03 03:30:06,365 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:30:11,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [897097136] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:11,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:30:11,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [9, 8] total 27 [2022-11-03 03:30:11,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125416147] [2022-11-03 03:30:11,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:11,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 03:30:11,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:11,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 03:30:11,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2022-11-03 03:30:11,635 INFO L87 Difference]: Start difference. First operand 94 states and 124 transitions. Second operand has 17 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-03 03:30:13,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:13,601 INFO L93 Difference]: Finished difference Result 113 states and 146 transitions. [2022-11-03 03:30:13,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 03:30:13,602 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 58 [2022-11-03 03:30:13,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:13,604 INFO L225 Difference]: With dead ends: 113 [2022-11-03 03:30:13,604 INFO L226 Difference]: Without dead ends: 111 [2022-11-03 03:30:13,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 128 SyntacticMatches, 19 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2022-11-03 03:30:13,606 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 54 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:13,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 61 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 03:30:13,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-03 03:30:13,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-11-03 03:30:13,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 64 states have internal predecessors, (73), 36 states have call successors, (36), 11 states have call predecessors, (36), 11 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-11-03 03:30:13,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 144 transitions. [2022-11-03 03:30:13,648 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 144 transitions. Word has length 58 [2022-11-03 03:30:13,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:13,649 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 144 transitions. [2022-11-03 03:30:13,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-03 03:30:13,650 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 144 transitions. [2022-11-03 03:30:13,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-03 03:30:13,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:13,651 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 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] [2022-11-03 03:30:13,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:13,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-03 03:30:13,857 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:13,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:13,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1984692712, now seen corresponding path program 1 times [2022-11-03 03:30:13,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:13,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290977198] [2022-11-03 03:30:13,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:13,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:13,869 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:30:13,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [477831513] [2022-11-03 03:30:13,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:13,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:30:13,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:30:13,871 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:30:13,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 03:30:13,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:13,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:30:13,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:14,062 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-03 03:30:14,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:30:14,193 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-03 03:30:14,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:14,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290977198] [2022-11-03 03:30:14,193 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:30:14,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477831513] [2022-11-03 03:30:14,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477831513] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:30:14,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1250520063] [2022-11-03 03:30:14,196 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-03 03:30:14,197 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:30:14,197 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:30:14,197 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:30:14,198 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:30:19,418 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-03 03:30:19,472 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-03 03:30:19,486 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:30:26,951 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3548#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:30:26,951 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:30:26,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:30:26,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-11-03 03:30:26,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549983200] [2022-11-03 03:30:26,952 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:30:26,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:30:26,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:26,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:30:26,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-11-03 03:30:26,954 INFO L87 Difference]: Start difference. First operand 111 states and 144 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 03:30:27,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:27,296 INFO L93 Difference]: Finished difference Result 122 states and 158 transitions. [2022-11-03 03:30:27,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:30:27,297 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 65 [2022-11-03 03:30:27,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:27,300 INFO L225 Difference]: With dead ends: 122 [2022-11-03 03:30:27,300 INFO L226 Difference]: Without dead ends: 120 [2022-11-03 03:30:27,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 157 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2022-11-03 03:30:27,301 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 18 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:27,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 106 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:30:27,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-03 03:30:27,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-11-03 03:30:27,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 69 states have internal predecessors, (77), 40 states have call successors, (40), 12 states have call predecessors, (40), 12 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2022-11-03 03:30:27,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 156 transitions. [2022-11-03 03:30:27,339 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 156 transitions. Word has length 65 [2022-11-03 03:30:27,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:27,340 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 156 transitions. [2022-11-03 03:30:27,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 03:30:27,341 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 156 transitions. [2022-11-03 03:30:27,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-03 03:30:27,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:27,342 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:27,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:27,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:30:27,550 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:27,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:27,550 INFO L85 PathProgramCache]: Analyzing trace with hash -2003369438, now seen corresponding path program 1 times [2022-11-03 03:30:27,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:27,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972296519] [2022-11-03 03:30:27,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:27,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:27,561 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:30:27,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1357901478] [2022-11-03 03:30:27,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:27,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:30:27,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:30:27,563 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:30:27,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 03:30:27,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:27,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 03:30:27,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:28,013 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-03 03:30:28,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:30:28,316 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-03 03:30:28,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:28,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972296519] [2022-11-03 03:30:28,316 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:30:28,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357901478] [2022-11-03 03:30:28,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357901478] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:30:28,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1930121894] [2022-11-03 03:30:28,319 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-03 03:30:28,319 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:30:28,320 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:30:28,320 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:30:28,320 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:30:32,870 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-03 03:30:32,873 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-03 03:30:32,887 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:30:51,130 WARN L234 SmtUtils]: Spent 9.33s on a formula simplification. DAG size of input: 77 DAG size of output: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:31:11,076 WARN L234 SmtUtils]: Spent 17.79s on a formula simplification. DAG size of input: 79 DAG size of output: 72 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:31:11,607 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4394#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:31:11,607 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:31:11,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:31:11,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-11-03 03:31:11,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844528454] [2022-11-03 03:31:11,608 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:31:11,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 03:31:11,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:31:11,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 03:31:11,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 03:31:11,610 INFO L87 Difference]: Start difference. First operand 120 states and 156 transitions. Second operand has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 13 states have internal predecessors, (29), 9 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2022-11-03 03:31:15,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:15,350 INFO L93 Difference]: Finished difference Result 199 states and 279 transitions. [2022-11-03 03:31:15,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 03:31:15,350 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 13 states have internal predecessors, (29), 9 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) Word has length 74 [2022-11-03 03:31:15,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:15,352 INFO L225 Difference]: With dead ends: 199 [2022-11-03 03:31:15,353 INFO L226 Difference]: Without dead ends: 197 [2022-11-03 03:31:15,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 174 SyntacticMatches, 14 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 40.1s TimeCoverageRelationStatistics Valid=312, Invalid=2138, Unknown=0, NotChecked=0, Total=2450 [2022-11-03 03:31:15,355 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 51 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:15,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 279 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 03:31:15,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-11-03 03:31:15,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 187. [2022-11-03 03:31:15,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 99 states have (on average 1.2222222222222223) internal successors, (121), 101 states have internal predecessors, (121), 73 states have call successors, (73), 14 states have call predecessors, (73), 14 states have return successors, (72), 71 states have call predecessors, (72), 72 states have call successors, (72) [2022-11-03 03:31:15,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 266 transitions. [2022-11-03 03:31:15,472 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 266 transitions. Word has length 74 [2022-11-03 03:31:15,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:15,473 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 266 transitions. [2022-11-03 03:31:15,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 13 states have internal predecessors, (29), 9 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2022-11-03 03:31:15,473 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 266 transitions. [2022-11-03 03:31:15,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-03 03:31:15,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:15,475 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:15,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:15,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 03:31:15,701 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:31:15,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:15,701 INFO L85 PathProgramCache]: Analyzing trace with hash -134461569, now seen corresponding path program 1 times [2022-11-03 03:31:15,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:31:15,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263824497] [2022-11-03 03:31:15,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:15,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:31:15,714 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:31:15,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1068853446] [2022-11-03 03:31:15,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:15,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:31:15,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:31:15,727 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:31:15,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 03:31:15,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:15,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:31:15,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:15,872 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-11-03 03:31:15,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:15,982 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-11-03 03:31:15,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:31:15,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263824497] [2022-11-03 03:31:15,983 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:31:15,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068853446] [2022-11-03 03:31:15,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068853446] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:31:15,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [962373426] [2022-11-03 03:31:15,985 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-03 03:31:15,986 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:31:15,986 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:31:15,986 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:31:15,987 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:31:22,517 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-03 03:31:22,520 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-03 03:31:22,537 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:31:51,096 WARN L234 SmtUtils]: Spent 26.48s on a formula simplification. DAG size of input: 176 DAG size of output: 147 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:32:06,360 WARN L234 SmtUtils]: Spent 13.56s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:32:28,668 WARN L234 SmtUtils]: Spent 21.74s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:32:55,157 WARN L234 SmtUtils]: Spent 24.10s on a formula simplification. DAG size of input: 174 DAG size of output: 82 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:32:55,466 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5535#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:32:55,466 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:32:55,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:32:55,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-11-03 03:32:55,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025400038] [2022-11-03 03:32:55,466 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:32:55,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:32:55,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:55,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:32:55,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2022-11-03 03:32:55,468 INFO L87 Difference]: Start difference. First operand 187 states and 266 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 03:32:55,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:55,933 INFO L93 Difference]: Finished difference Result 201 states and 277 transitions. [2022-11-03 03:32:55,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:32:55,934 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 79 [2022-11-03 03:32:55,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:55,935 INFO L225 Difference]: With dead ends: 201 [2022-11-03 03:32:55,936 INFO L226 Difference]: Without dead ends: 197 [2022-11-03 03:32:55,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 205 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 93.2s TimeCoverageRelationStatistics Valid=170, Invalid=886, Unknown=0, NotChecked=0, Total=1056 [2022-11-03 03:32:55,937 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 24 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:55,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 87 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:32:55,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-11-03 03:32:56,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2022-11-03 03:32:56,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 109 states have internal predecessors, (127), 71 states have call successors, (71), 17 states have call predecessors, (71), 17 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2022-11-03 03:32:56,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 268 transitions. [2022-11-03 03:32:56,036 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 268 transitions. Word has length 79 [2022-11-03 03:32:56,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:56,037 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 268 transitions. [2022-11-03 03:32:56,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 03:32:56,038 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 268 transitions. [2022-11-03 03:32:56,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-03 03:32:56,039 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:56,039 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:56,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:56,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:32:56,258 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:56,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:56,259 INFO L85 PathProgramCache]: Analyzing trace with hash 145896886, now seen corresponding path program 1 times [2022-11-03 03:32:56,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:56,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327819952] [2022-11-03 03:32:56,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:56,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:56,271 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:32:56,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2098496312] [2022-11-03 03:32:56,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:56,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:32:56,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:32:56,274 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:32:56,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 03:32:56,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:56,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-03 03:32:56,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:57,479 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 81 proven. 36 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2022-11-03 03:32:57,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:33:22,238 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 79 proven. 33 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-11-03 03:33:22,238 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:22,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327819952] [2022-11-03 03:33:22,239 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:33:22,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098496312] [2022-11-03 03:33:22,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098496312] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:33:22,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1708766057] [2022-11-03 03:33:22,241 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-03 03:33:22,241 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:33:22,242 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:33:22,242 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:33:22,242 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:33:25,838 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-03 03:33:25,842 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-03 03:33:25,855 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:34:06,969 WARN L234 SmtUtils]: Spent 14.87s on a formula simplification. DAG size of input: 83 DAG size of output: 76 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:34:29,439 WARN L234 SmtUtils]: Spent 15.34s on a formula simplification. DAG size of input: 85 DAG size of output: 76 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:34:35,496 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6743#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:34:35,496 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:34:35,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:34:35,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-11-03 03:34:35,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902312979] [2022-11-03 03:34:35,496 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:34:35,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 03:34:35,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:35,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 03:34:35,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1415, Unknown=5, NotChecked=0, Total=1640 [2022-11-03 03:34:35,498 INFO L87 Difference]: Start difference. First operand 197 states and 268 transitions. Second operand has 22 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 12 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (32), 13 states have call predecessors, (32), 11 states have call successors, (32) [2022-11-03 03:34:37,583 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 [] [2022-11-03 03:34:40,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 03:34:43,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 03:34:57,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 03:35:04,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 03:35:06,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 03:35:08,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 03:35:11,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 03:35:16,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 03:35:50,443 WARN L234 SmtUtils]: Spent 22.66s on a formula simplification. DAG size of input: 72 DAG size of output: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:35:51,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:35:51,487 INFO L93 Difference]: Finished difference Result 234 states and 316 transitions. [2022-11-03 03:35:51,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-03 03:35:51,488 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 12 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (32), 13 states have call predecessors, (32), 11 states have call successors, (32) Word has length 90 [2022-11-03 03:35:51,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:35:51,490 INFO L225 Difference]: With dead ends: 234 [2022-11-03 03:35:51,490 INFO L226 Difference]: Without dead ends: 232 [2022-11-03 03:35:51,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 209 SyntacticMatches, 20 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1564 ImplicationChecksByTransitivity, 124.2s TimeCoverageRelationStatistics Valid=480, Invalid=2707, Unknown=5, NotChecked=0, Total=3192 [2022-11-03 03:35:51,493 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 98 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 211 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:35:51,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 115 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 670 Invalid, 9 Unknown, 0 Unchecked, 29.4s Time] [2022-11-03 03:35:51,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-11-03 03:35:51,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 226. [2022-11-03 03:35:51,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 123 states have (on average 1.1626016260162602) internal successors, (143), 127 states have internal predecessors, (143), 83 states have call successors, (83), 19 states have call predecessors, (83), 19 states have return successors, (82), 79 states have call predecessors, (82), 82 states have call successors, (82) [2022-11-03 03:35:51,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 308 transitions. [2022-11-03 03:35:51,640 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 308 transitions. Word has length 90 [2022-11-03 03:35:51,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:35:51,641 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 308 transitions. [2022-11-03 03:35:51,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 12 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (32), 13 states have call predecessors, (32), 11 states have call successors, (32) [2022-11-03 03:35:51,641 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 308 transitions. [2022-11-03 03:35:51,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-03 03:35:51,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:35:51,643 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:35:51,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 03:35:51,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 03:35:51,850 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:35:51,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:35:51,850 INFO L85 PathProgramCache]: Analyzing trace with hash 2106799636, now seen corresponding path program 2 times [2022-11-03 03:35:51,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:35:51,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757163483] [2022-11-03 03:35:51,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:51,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:35:51,865 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:35:51,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [414381192] [2022-11-03 03:35:51,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:35:51,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:35:51,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:35:51,870 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:35:51,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 03:35:51,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 03:35:51,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:35:51,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:35:51,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:51,974 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-11-03 03:35:51,974 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:35:51,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:35:51,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757163483] [2022-11-03 03:35:51,975 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:35:51,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414381192] [2022-11-03 03:35:51,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414381192] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:35:51,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:35:51,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:35:51,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15981510] [2022-11-03 03:35:51,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:35:51,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:35:51,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:35:51,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:35:51,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:35:51,981 INFO L87 Difference]: Start difference. First operand 226 states and 308 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:35:52,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:35:52,243 INFO L93 Difference]: Finished difference Result 325 states and 441 transitions. [2022-11-03 03:35:52,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:35:52,243 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 99 [2022-11-03 03:35:52,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:35:52,245 INFO L225 Difference]: With dead ends: 325 [2022-11-03 03:35:52,245 INFO L226 Difference]: Without dead ends: 211 [2022-11-03 03:35:52,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:35:52,247 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 6 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:35:52,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 128 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:35:52,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-03 03:35:52,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 179. [2022-11-03 03:35:52,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 100 states have (on average 1.12) internal successors, (112), 103 states have internal predecessors, (112), 59 states have call successors, (59), 19 states have call predecessors, (59), 19 states have return successors, (58), 56 states have call predecessors, (58), 58 states have call successors, (58) [2022-11-03 03:35:52,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 229 transitions. [2022-11-03 03:35:52,358 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 229 transitions. Word has length 99 [2022-11-03 03:35:52,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:35:52,359 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 229 transitions. [2022-11-03 03:35:52,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:35:52,359 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 229 transitions. [2022-11-03 03:35:52,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-03 03:35:52,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:35:52,361 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:35:52,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-03 03:35:52,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 03:35:52,577 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:35:52,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:35:52,577 INFO L85 PathProgramCache]: Analyzing trace with hash -425141716, now seen corresponding path program 2 times [2022-11-03 03:35:52,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:35:52,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928502000] [2022-11-03 03:35:52,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:52,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:35:52,587 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:35:52,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [476668528] [2022-11-03 03:35:52,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:35:52,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:35:52,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:35:52,589 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:35:52,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54728cc7-c825-471e-96fb-d9e5f83eb4cf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 03:35:52,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 03:35:52,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:35:52,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-03 03:35:52,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:54,677 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 51 proven. 48 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2022-11-03 03:35:54,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:36:09,517 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 51 proven. 42 refuted. 6 times theorem prover too weak. 355 trivial. 0 not checked. [2022-11-03 03:36:09,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:36:09,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928502000] [2022-11-03 03:36:09,518 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:36:09,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476668528] [2022-11-03 03:36:09,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476668528] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:36:09,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1662659789] [2022-11-03 03:36:09,520 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-03 03:36:09,520 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:36:09,521 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:36:09,521 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:36:09,521 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:36:13,692 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-03 03:36:13,696 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-03 03:36:13,709 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:36:35,057 WARN L234 SmtUtils]: Spent 11.33s on a formula simplification. DAG size of input: 83 DAG size of output: 76 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:36:54,761 WARN L234 SmtUtils]: Spent 17.11s on a formula simplification. DAG size of input: 85 DAG size of output: 76 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:36:55,128 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9266#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:36:55,128 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:36:55,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:36:55,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2022-11-03 03:36:55,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181438702] [2022-11-03 03:36:55,129 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:36:55,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-03 03:36:55,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:36:55,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-03 03:36:55,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1488, Unknown=3, NotChecked=0, Total=1722 [2022-11-03 03:36:55,130 INFO L87 Difference]: Start difference. First operand 179 states and 229 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 20 states have internal predecessors, (40), 13 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 11 states have call predecessors, (36), 13 states have call successors, (36) [2022-11-03 03:37:46,063 WARN L234 SmtUtils]: Spent 48.73s on a formula simplification that was a NOOP. DAG size: 83 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:37:50,793 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 [] [2022-11-03 03:37:53,423 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse4 (* 2 |c_ULTIMATE.start_main_~b~0#1|)) (.cse1 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse0 (<= |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~c~0#1|)) (.cse9 (= |c_ULTIMATE.start_main_~b~0#1| 0)) (.cse10 (* |c_ULTIMATE.start_main_~c~0#1| (- 1)))) (and (or (= |c_ULTIMATE.start_main_~c~0#1| 0) (not (= (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~k~0#1|)) |c_ULTIMATE.start_main_~a~0#1|)) .cse0 (= (+ .cse1 .cse2) (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)))) (let ((.cse5 (div .cse4 |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse3 (* .cse5 |c_ULTIMATE.start_main_~b~0#1|))) (or (<= (+ .cse3 |c_ULTIMATE.start_main_~b~0#1|) |c_ULTIMATE.start_main_~a~0#1|) (not (<= .cse4 |c_ULTIMATE.start_main_~a~0#1|)) (= .cse3 |c_ULTIMATE.start_main_~a~0#1|) (= (+ |c_ULTIMATE.start_main_~a~0#1| (* |c_ULTIMATE.start_main_~x~0#1| .cse5 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| .cse5 |c_ULTIMATE.start_main_~s~0#1|)) (+ .cse3 .cse1 .cse2))))) (let ((.cse8 (+ |c_ULTIMATE.start_main_~a~0#1| .cse10 .cse4))) (let ((.cse7 (div .cse8 |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse6 (* .cse7 |c_ULTIMATE.start_main_~b~0#1|))) (or (<= (+ |c_ULTIMATE.start_main_~b~0#1| .cse6) |c_ULTIMATE.start_main_~a~0#1|) (= |c_ULTIMATE.start_main_~a~0#1| .cse6) (< .cse7 (+ 2 |c_ULTIMATE.start_main_~k~0#1|)) (not (= (mod .cse8 |c_ULTIMATE.start_main_~b~0#1|) 0)) (= (+ .cse1 .cse2 .cse6) (+ |c_ULTIMATE.start_main_~a~0#1| (* |c_ULTIMATE.start_main_~x~0#1| .cse7 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| .cse7 |c_ULTIMATE.start_main_~s~0#1|))) (not (<= .cse4 |c_ULTIMATE.start_main_~c~0#1|)) .cse9)))) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|) (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) |c_ULTIMATE.start_main_~b~0#1|) (let ((.cse13 (+ |c_ULTIMATE.start_main_~a~0#1| .cse10 |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse12 (div .cse13 |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse11 (* .cse12 |c_ULTIMATE.start_main_~b~0#1|))) (or (= |c_ULTIMATE.start_main_~a~0#1| .cse11) (not (<= (+ |c_ULTIMATE.start_main_~k~0#1| 1) .cse12)) (= (+ .cse1 .cse2 .cse11) (+ |c_ULTIMATE.start_main_~a~0#1| (* |c_ULTIMATE.start_main_~y~0#1| .cse12 |c_ULTIMATE.start_main_~s~0#1|) (* |c_ULTIMATE.start_main_~x~0#1| .cse12 |c_ULTIMATE.start_main_~q~0#1|))) (not .cse0) (<= (+ |c_ULTIMATE.start_main_~b~0#1| .cse11) |c_ULTIMATE.start_main_~a~0#1|) .cse9 (not (= (mod .cse13 |c_ULTIMATE.start_main_~b~0#1|) 0)))))))) is different from true [2022-11-03 03:37:55,474 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse3 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse4 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse6 (= |c_ULTIMATE.start_main_~b~0#1| 0)) (.cse7 (* |c_ULTIMATE.start_main_~c~0#1| (- 1)))) (and (let ((.cse5 (* 2 |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse2 (+ |c_ULTIMATE.start_main_~a~0#1| .cse7 .cse5))) (let ((.cse1 (div .cse2 |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse0 (* .cse1 |c_ULTIMATE.start_main_~b~0#1|))) (or (<= (+ |c_ULTIMATE.start_main_~b~0#1| .cse0) |c_ULTIMATE.start_main_~a~0#1|) (= |c_ULTIMATE.start_main_~a~0#1| .cse0) (< .cse1 (+ 2 |c_ULTIMATE.start_main_~k~0#1|)) (not (= (mod .cse2 |c_ULTIMATE.start_main_~b~0#1|) 0)) (= (+ .cse3 .cse4 .cse0) (+ |c_ULTIMATE.start_main_~a~0#1| (* |c_ULTIMATE.start_main_~x~0#1| .cse1 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| .cse1 |c_ULTIMATE.start_main_~s~0#1|))) (not (<= .cse5 |c_ULTIMATE.start_main_~c~0#1|)) .cse6))))) (let ((.cse10 (+ |c_ULTIMATE.start_main_~a~0#1| .cse7 |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse9 (div .cse10 |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse8 (* .cse9 |c_ULTIMATE.start_main_~b~0#1|))) (or (= |c_ULTIMATE.start_main_~a~0#1| .cse8) (not (<= (+ |c_ULTIMATE.start_main_~k~0#1| 1) .cse9)) (= (+ .cse3 .cse4 .cse8) (+ |c_ULTIMATE.start_main_~a~0#1| (* |c_ULTIMATE.start_main_~y~0#1| .cse9 |c_ULTIMATE.start_main_~s~0#1|) (* |c_ULTIMATE.start_main_~x~0#1| .cse9 |c_ULTIMATE.start_main_~q~0#1|))) (not (<= |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~c~0#1|)) (<= (+ |c_ULTIMATE.start_main_~b~0#1| .cse8) |c_ULTIMATE.start_main_~a~0#1|) .cse6 (not (= (mod .cse10 |c_ULTIMATE.start_main_~b~0#1|) 0)))))))) is different from true [2022-11-03 03:38:44,468 WARN L234 SmtUtils]: Spent 48.31s on a formula simplification that was a NOOP. DAG size: 84 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:39:07,297 WARN L234 SmtUtils]: Spent 16.70s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:39:09,309 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 [] [2022-11-03 03:39:11,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 03:39:17,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 03:39:19,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 03:39:24,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 03:39:43,717 WARN L234 SmtUtils]: Spent 19.05s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:40:46,071 WARN L234 SmtUtils]: Spent 1.01m on a formula simplification that was a NOOP. DAG size: 89 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:40:59,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 03:41:01,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 03:43:29,700 WARN L234 SmtUtils]: Spent 2.39m on a formula simplification. DAG size of input: 94 DAG size of output: 94 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:43:33,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 03:43:35,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 03:43:37,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 03:43:39,886 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|))) (let ((.cse5 (* |c_ULTIMATE.start_main_~y~0#1| 2)) (.cse4 (+ .cse6 |c_ULTIMATE.start_main_~x~0#1|)) (.cse2 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse3 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse1 (<= |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~c~0#1|)) (.cse0 (= |c_ULTIMATE.start_main_~b~0#1| 0))) (and (not .cse0) (or (= |c_ULTIMATE.start_main_~c~0#1| 0) (not (= (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~k~0#1|)) |c_ULTIMATE.start_main_~a~0#1|)) .cse1 (= (+ .cse2 .cse3) (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)))) (not (<= |c_ULTIMATE.start_main_~y~0#1| .cse4)) (<= .cse5 |c_ULTIMATE.start_main_~x~0#1|) (= (+ .cse6 .cse5) 0) (= 1 |c_ULTIMATE.start_main_~q~0#1|) (= |c_ULTIMATE.start_main_~b~0#1| .cse4) (let ((.cse9 (+ |c_ULTIMATE.start_main_~a~0#1| (* |c_ULTIMATE.start_main_~c~0#1| (- 1)) |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse8 (div .cse9 |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse7 (* .cse8 |c_ULTIMATE.start_main_~b~0#1|))) (or (= |c_ULTIMATE.start_main_~a~0#1| .cse7) (not (<= (+ |c_ULTIMATE.start_main_~k~0#1| 1) .cse8)) (= (+ .cse2 .cse3 .cse7) (+ |c_ULTIMATE.start_main_~a~0#1| (* |c_ULTIMATE.start_main_~y~0#1| .cse8 |c_ULTIMATE.start_main_~s~0#1|) (* |c_ULTIMATE.start_main_~x~0#1| .cse8 |c_ULTIMATE.start_main_~q~0#1|))) (not .cse1) (<= (+ |c_ULTIMATE.start_main_~b~0#1| .cse7) |c_ULTIMATE.start_main_~a~0#1|) .cse0 (not (= (mod .cse9 |c_ULTIMATE.start_main_~b~0#1|) 0))))))))) is different from true [2022-11-03 03:44:02,821 WARN L234 SmtUtils]: Spent 21.87s on a formula simplification that was a NOOP. DAG size: 83 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:44:04,826 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 []