./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW --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 1b264b79c7d49597e329d8bc966f852f62544d53af86fa71e439360bb21aacf5 --- 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-4e7fbc6 [2022-11-23 16:07:21,628 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 16:07:21,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 16:07:21,652 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 16:07:21,652 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 16:07:21,654 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 16:07:21,655 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 16:07:21,657 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 16:07:21,659 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 16:07:21,660 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 16:07:21,661 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 16:07:21,663 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 16:07:21,663 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 16:07:21,664 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 16:07:21,666 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 16:07:21,667 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 16:07:21,668 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 16:07:21,669 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 16:07:21,671 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 16:07:21,673 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 16:07:21,675 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 16:07:21,676 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 16:07:21,677 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 16:07:21,678 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 16:07:21,682 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 16:07:21,682 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 16:07:21,683 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 16:07:21,684 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 16:07:21,685 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 16:07:21,686 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 16:07:21,686 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 16:07:21,687 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 16:07:21,688 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 16:07:21,689 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 16:07:21,690 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 16:07:21,691 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 16:07:21,692 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 16:07:21,692 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 16:07:21,693 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 16:07:21,694 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 16:07:21,703 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 16:07:21,704 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 16:07:21,736 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 16:07:21,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 16:07:21,737 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 16:07:21,737 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 16:07:21,738 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 16:07:21,738 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 16:07:21,738 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 16:07:21,739 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 16:07:21,739 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 16:07:21,739 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 16:07:21,739 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 16:07:21,740 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 16:07:21,740 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 16:07:21,740 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 16:07:21,740 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 16:07:21,741 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 16:07:21,741 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 16:07:21,741 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 16:07:21,742 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 16:07:21,742 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 16:07:21,742 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 16:07:21,743 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 16:07:21,743 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 16:07:21,743 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 16:07:21,743 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 16:07:21,743 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 16:07:21,744 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 16:07:21,744 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 16:07:21,744 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 16:07:21,744 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 16:07:21,745 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 16:07:21,745 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 16:07:21,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 16:07:21,745 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 16:07:21,746 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 16:07:21,746 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 16:07:21,746 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 16:07:21,746 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 16:07:21,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 16:07:21,747 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 16:07:21,747 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 16:07:21,747 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_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b264b79c7d49597e329d8bc966f852f62544d53af86fa71e439360bb21aacf5 [2022-11-23 16:07:22,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 16:07:22,111 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 16:07:22,113 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 16:07:22,114 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 16:07:22,116 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 16:07:22,117 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound1.c [2022-11-23 16:07:25,211 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 16:07:25,497 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 16:07:25,498 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound1.c [2022-11-23 16:07:25,507 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/data/78562d25b/5d7a0772516e495997892aa4319310e0/FLAGc637668e4 [2022-11-23 16:07:25,540 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/data/78562d25b/5d7a0772516e495997892aa4319310e0 [2022-11-23 16:07:25,542 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 16:07:25,546 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 16:07:25,552 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 16:07:25,552 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 16:07:25,556 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 16:07:25,557 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:07:25" (1/1) ... [2022-11-23 16:07:25,558 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37476216 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:25, skipping insertion in model container [2022-11-23 16:07:25,559 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:07:25" (1/1) ... [2022-11-23 16:07:25,566 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 16:07:25,585 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 16:07:25,734 WARN L237 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_cf26463b-a198-4bfd-8159-d0cb6641a122/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound1.c[709,722] [2022-11-23 16:07:25,756 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 16:07:25,766 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 16:07:25,778 WARN L237 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_cf26463b-a198-4bfd-8159-d0cb6641a122/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound1.c[709,722] [2022-11-23 16:07:25,789 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 16:07:25,803 INFO L208 MainTranslator]: Completed translation [2022-11-23 16:07:25,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:25 WrapperNode [2022-11-23 16:07:25,804 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 16:07:25,805 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 16:07:25,805 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 16:07:25,805 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 16:07:25,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:25" (1/1) ... [2022-11-23 16:07:25,821 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:25" (1/1) ... [2022-11-23 16:07:25,840 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 41 [2022-11-23 16:07:25,841 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 16:07:25,841 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 16:07:25,842 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 16:07:25,842 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 16:07:25,851 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:25" (1/1) ... [2022-11-23 16:07:25,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:25" (1/1) ... [2022-11-23 16:07:25,853 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:25" (1/1) ... [2022-11-23 16:07:25,853 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:25" (1/1) ... [2022-11-23 16:07:25,858 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:25" (1/1) ... [2022-11-23 16:07:25,862 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:25" (1/1) ... [2022-11-23 16:07:25,863 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:25" (1/1) ... [2022-11-23 16:07:25,864 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:25" (1/1) ... [2022-11-23 16:07:25,866 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 16:07:25,867 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 16:07:25,867 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 16:07:25,867 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 16:07:25,868 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:25" (1/1) ... [2022-11-23 16:07:25,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 16:07:25,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:07:25,900 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 16:07:25,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 16:07:25,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 16:07:25,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 16:07:25,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 16:07:25,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 16:07:25,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-23 16:07:25,946 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-23 16:07:26,047 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 16:07:26,070 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 16:07:26,275 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 16:07:26,291 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 16:07:26,291 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 16:07:26,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:07:26 BoogieIcfgContainer [2022-11-23 16:07:26,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 16:07:26,296 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 16:07:26,296 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 16:07:26,300 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 16:07:26,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:07:25" (1/3) ... [2022-11-23 16:07:26,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a6b49f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:07:26, skipping insertion in model container [2022-11-23 16:07:26,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:25" (2/3) ... [2022-11-23 16:07:26,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a6b49f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:07:26, skipping insertion in model container [2022-11-23 16:07:26,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:07:26" (3/3) ... [2022-11-23 16:07:26,303 INFO L112 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound1.c [2022-11-23 16:07:26,321 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 16:07:26,322 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 16:07:26,367 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 16:07:26,373 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;@27eba11e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 16:07:26,374 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 16:07:26,377 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 16:07:26,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 16:07:26,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:07:26,384 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 16:07:26,385 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:07:26,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:07:26,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1811081999, now seen corresponding path program 1 times [2022-11-23 16:07:26,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:07:26,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30487866] [2022-11-23 16:07:26,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:26,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:07:26,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:26,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:07:26,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30487866] [2022-11-23 16:07:26,555 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-23 16:07:26,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547061305] [2022-11-23 16:07:26,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:26,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:07:26,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:07:26,565 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:07:26,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 16:07:26,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:26,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-23 16:07:26,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:07:26,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:07:26,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:07:26,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547061305] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:07:26,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:07:26,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 16:07:26,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110258207] [2022-11-23 16:07:26,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:07:26,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 16:07:26,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:07:26,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 16:07:26,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 16:07:26,723 INFO L87 Difference]: Start difference. First operand has 18 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:07:26,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:07:26,763 INFO L93 Difference]: Finished difference Result 35 states and 57 transitions. [2022-11-23 16:07:26,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 16:07:26,766 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-23 16:07:26,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:07:26,773 INFO L225 Difference]: With dead ends: 35 [2022-11-23 16:07:26,774 INFO L226 Difference]: Without dead ends: 16 [2022-11-23 16:07:26,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 16:07:26,780 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:07:26,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 16:07:26,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-23 16:07:26,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-23 16:07:26,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-23 16:07:26,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2022-11-23 16:07:26,819 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 6 [2022-11-23 16:07:26,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:07:26,819 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2022-11-23 16:07:26,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:07:26,820 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2022-11-23 16:07:26,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 16:07:26,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:07:26,821 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:07:26,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 16:07:27,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:07:27,027 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:07:27,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:07:27,028 INFO L85 PathProgramCache]: Analyzing trace with hash -772994646, now seen corresponding path program 1 times [2022-11-23 16:07:27,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:07:27,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063863575] [2022-11-23 16:07:27,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:27,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:07:27,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:27,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:07:27,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063863575] [2022-11-23 16:07:27,076 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-23 16:07:27,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029642656] [2022-11-23 16:07:27,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:27,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:07:27,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:07:27,080 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:07:27,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 16:07:27,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:27,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 16:07:27,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:07:27,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:07:27,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:07:27,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029642656] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:07:27,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:07:27,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:07:27,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987454892] [2022-11-23 16:07:27,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:07:27,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:07:27,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:07:27,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:07:27,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:07:27,235 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:07:27,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:07:27,274 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2022-11-23 16:07:27,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 16:07:27,277 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-23 16:07:27,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:07:27,278 INFO L225 Difference]: With dead ends: 27 [2022-11-23 16:07:27,278 INFO L226 Difference]: Without dead ends: 18 [2022-11-23 16:07:27,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:07:27,280 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:07:27,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 16:07:27,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-23 16:07:27,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-23 16:07:27,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-23 16:07:27,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2022-11-23 16:07:27,287 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 7 [2022-11-23 16:07:27,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:07:27,287 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2022-11-23 16:07:27,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:07:27,288 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2022-11-23 16:07:27,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 16:07:27,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:07:27,288 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:07:27,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 16:07:27,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:07:27,489 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:07:27,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:07:27,490 INFO L85 PathProgramCache]: Analyzing trace with hash -771326350, now seen corresponding path program 1 times [2022-11-23 16:07:27,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:07:27,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080952379] [2022-11-23 16:07:27,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:27,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:07:27,508 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 16:07:27,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [50841614] [2022-11-23 16:07:27,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:27,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:07:27,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:07:27,510 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:07:27,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 16:07:27,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 16:07:27,573 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 16:07:27,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 16:07:27,603 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-23 16:07:27,604 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 16:07:27,605 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-23 16:07:27,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 16:07:27,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:07:27,826 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-23 16:07:27,830 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-23 16:07:27,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 04:07:27 BoogieIcfgContainer [2022-11-23 16:07:27,848 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-23 16:07:27,849 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-23 16:07:27,849 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-23 16:07:27,849 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-23 16:07:27,850 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:07:26" (3/4) ... [2022-11-23 16:07:27,853 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-23 16:07:27,853 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-23 16:07:27,854 INFO L158 Benchmark]: Toolchain (without parser) took 2310.00ms. Allocated memory is still 155.2MB. Free memory was 127.1MB in the beginning and 79.2MB in the end (delta: 47.8MB). Peak memory consumption was 45.6MB. Max. memory is 16.1GB. [2022-11-23 16:07:27,854 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 125.8MB. Free memory is still 98.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 16:07:27,855 INFO L158 Benchmark]: CACSL2BoogieTranslator took 252.39ms. Allocated memory is still 155.2MB. Free memory was 127.1MB in the beginning and 115.8MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-23 16:07:27,855 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.90ms. Allocated memory is still 155.2MB. Free memory was 115.8MB in the beginning and 114.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 16:07:27,856 INFO L158 Benchmark]: Boogie Preprocessor took 24.37ms. Allocated memory is still 155.2MB. Free memory was 114.5MB in the beginning and 113.1MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 16:07:27,856 INFO L158 Benchmark]: RCFGBuilder took 427.39ms. Allocated memory is still 155.2MB. Free memory was 113.1MB in the beginning and 119.2MB in the end (delta: -6.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-23 16:07:27,857 INFO L158 Benchmark]: TraceAbstraction took 1552.35ms. Allocated memory is still 155.2MB. Free memory was 118.4MB in the beginning and 79.2MB in the end (delta: 39.1MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. [2022-11-23 16:07:27,857 INFO L158 Benchmark]: Witness Printer took 4.16ms. Allocated memory is still 155.2MB. Free memory is still 79.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 16:07:27,859 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 125.8MB. Free memory is still 98.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 252.39ms. Allocated memory is still 155.2MB. Free memory was 127.1MB in the beginning and 115.8MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.90ms. Allocated memory is still 155.2MB. Free memory was 115.8MB in the beginning and 114.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 24.37ms. Allocated memory is still 155.2MB. Free memory was 114.5MB in the beginning and 113.1MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 427.39ms. Allocated memory is still 155.2MB. Free memory was 113.1MB in the beginning and 119.2MB in the end (delta: -6.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 1552.35ms. Allocated memory is still 155.2MB. Free memory was 118.4MB in the beginning and 79.2MB in the end (delta: 39.1MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. * Witness Printer took 4.16ms. Allocated memory is still 155.2MB. Free memory is still 79.2MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_int at line 34. Possible FailurePath: [L24] int counter = 0; [L26] int r; [L27] double a, x, s; [L28] a = __VERIFIER_nondet_double() [L29] x = a [L30] s = 3.25 [L31] r = 1 VAL [a=2, counter=0, r=1, s=13/4, x=2] [L33] EXPR counter++ VAL [a=2, counter=1, counter++=0, r=1, s=13/4, x=2] [L33] COND TRUE counter++<1 [L34] CALL __VERIFIER_assert((int)(4*s) - 12*r*r == 1) VAL [counter=1, unknown-#in~cond-unknown=0] [L17] COND TRUE !(cond) VAL [cond=0, counter=1, unknown-#in~cond-unknown=0] [L19] reach_error() VAL [cond=0, counter=1, unknown-#in~cond-unknown=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.5s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 78 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 37 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11 IncrementalHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 41 mSDtfsCounter, 11 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, InterpolantAutomatonStates: 6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 33 NumberOfCodeBlocks, 33 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 15 SizeOfPredicates, 0 NumberOfNonLiveVariables, 90 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-23 16:07:27,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW --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 1b264b79c7d49597e329d8bc966f852f62544d53af86fa71e439360bb21aacf5 --- 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-4e7fbc6 [2022-11-23 16:07:30,409 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 16:07:30,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 16:07:30,473 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 16:07:30,474 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 16:07:30,477 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 16:07:30,480 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 16:07:30,484 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 16:07:30,486 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 16:07:30,492 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 16:07:30,493 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 16:07:30,496 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 16:07:30,496 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 16:07:30,498 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 16:07:30,500 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 16:07:30,506 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 16:07:30,508 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 16:07:30,509 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 16:07:30,510 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 16:07:30,512 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 16:07:30,513 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 16:07:30,517 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 16:07:30,518 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 16:07:30,519 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 16:07:30,533 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 16:07:30,533 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 16:07:30,533 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 16:07:30,535 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 16:07:30,536 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 16:07:30,537 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 16:07:30,537 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 16:07:30,538 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 16:07:30,540 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 16:07:30,541 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 16:07:30,541 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 16:07:30,542 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 16:07:30,542 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 16:07:30,543 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 16:07:30,543 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 16:07:30,544 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 16:07:30,544 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 16:07:30,549 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-23 16:07:30,591 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 16:07:30,591 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 16:07:30,592 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 16:07:30,592 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 16:07:30,594 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 16:07:30,594 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 16:07:30,594 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 16:07:30,594 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 16:07:30,594 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 16:07:30,595 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 16:07:30,596 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 16:07:30,596 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 16:07:30,597 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 16:07:30,597 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 16:07:30,597 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 16:07:30,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 16:07:30,597 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 16:07:30,598 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 16:07:30,598 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 16:07:30,598 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 16:07:30,598 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-23 16:07:30,598 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-23 16:07:30,598 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 16:07:30,599 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 16:07:30,599 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 16:07:30,599 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 16:07:30,599 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 16:07:30,599 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 16:07:30,600 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 16:07:30,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 16:07:30,600 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 16:07:30,600 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 16:07:30,601 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 16:07:30,601 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-23 16:07:30,601 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-23 16:07:30,601 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 16:07:30,601 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 16:07:30,601 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 16:07:30,602 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b264b79c7d49597e329d8bc966f852f62544d53af86fa71e439360bb21aacf5 [2022-11-23 16:07:30,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 16:07:31,029 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 16:07:31,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 16:07:31,033 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 16:07:31,033 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 16:07:31,035 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound1.c [2022-11-23 16:07:34,115 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 16:07:34,344 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 16:07:34,344 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound1.c [2022-11-23 16:07:34,350 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/data/5584895c4/2ed5efa868b6417ba2392df361d22e50/FLAG04b568e55 [2022-11-23 16:07:34,365 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/data/5584895c4/2ed5efa868b6417ba2392df361d22e50 [2022-11-23 16:07:34,367 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 16:07:34,369 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 16:07:34,379 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 16:07:34,379 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 16:07:34,384 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 16:07:34,385 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:07:34" (1/1) ... [2022-11-23 16:07:34,387 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a4772a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:34, skipping insertion in model container [2022-11-23 16:07:34,387 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:07:34" (1/1) ... [2022-11-23 16:07:34,394 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 16:07:34,420 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 16:07:34,629 WARN L237 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_cf26463b-a198-4bfd-8159-d0cb6641a122/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound1.c[709,722] [2022-11-23 16:07:34,673 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 16:07:34,689 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 16:07:34,705 WARN L237 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_cf26463b-a198-4bfd-8159-d0cb6641a122/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound1.c[709,722] [2022-11-23 16:07:34,729 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 16:07:34,754 INFO L208 MainTranslator]: Completed translation [2022-11-23 16:07:34,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:34 WrapperNode [2022-11-23 16:07:34,754 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 16:07:34,755 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 16:07:34,756 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 16:07:34,756 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 16:07:34,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:34" (1/1) ... [2022-11-23 16:07:34,785 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:34" (1/1) ... [2022-11-23 16:07:34,814 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2022-11-23 16:07:34,814 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 16:07:34,816 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 16:07:34,816 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 16:07:34,816 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 16:07:34,826 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:34" (1/1) ... [2022-11-23 16:07:34,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:34" (1/1) ... [2022-11-23 16:07:34,835 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:34" (1/1) ... [2022-11-23 16:07:34,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:34" (1/1) ... [2022-11-23 16:07:34,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:34" (1/1) ... [2022-11-23 16:07:34,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:34" (1/1) ... [2022-11-23 16:07:34,866 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:34" (1/1) ... [2022-11-23 16:07:34,867 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:34" (1/1) ... [2022-11-23 16:07:34,869 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 16:07:34,870 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 16:07:34,870 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 16:07:34,870 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 16:07:34,871 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:34" (1/1) ... [2022-11-23 16:07:34,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 16:07:34,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:07:34,904 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 16:07:34,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 16:07:34,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 16:07:34,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-23 16:07:34,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 16:07:34,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 16:07:34,952 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-23 16:07:34,952 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-23 16:07:35,056 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 16:07:35,058 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 16:07:36,978 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 16:07:36,992 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 16:07:36,992 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 16:07:37,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:07:37 BoogieIcfgContainer [2022-11-23 16:07:37,004 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 16:07:37,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 16:07:37,019 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 16:07:37,022 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 16:07:37,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:07:34" (1/3) ... [2022-11-23 16:07:37,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a992533 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:07:37, skipping insertion in model container [2022-11-23 16:07:37,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:07:34" (2/3) ... [2022-11-23 16:07:37,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a992533 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:07:37, skipping insertion in model container [2022-11-23 16:07:37,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:07:37" (3/3) ... [2022-11-23 16:07:37,026 INFO L112 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound1.c [2022-11-23 16:07:37,045 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 16:07:37,046 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 16:07:37,092 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 16:07:37,099 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;@36283607, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 16:07:37,099 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 16:07:37,103 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 16:07:37,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 16:07:37,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:07:37,111 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:07:37,111 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:07:37,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:07:37,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1821846948, now seen corresponding path program 1 times [2022-11-23 16:07:37,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:07:37,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [845044528] [2022-11-23 16:07:37,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:37,131 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:07:37,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:07:37,138 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:07:37,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-23 16:07:37,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:37,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-23 16:07:37,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:07:37,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:07:37,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:07:37,361 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:07:37,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [845044528] [2022-11-23 16:07:37,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [845044528] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:07:37,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:07:37,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 16:07:37,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657858654] [2022-11-23 16:07:37,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:07:37,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 16:07:37,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:07:37,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 16:07:37,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 16:07:37,400 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:07:37,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:07:37,428 INFO L93 Difference]: Finished difference Result 40 states and 62 transitions. [2022-11-23 16:07:37,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 16:07:37,430 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-23 16:07:37,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:07:37,437 INFO L225 Difference]: With dead ends: 40 [2022-11-23 16:07:37,438 INFO L226 Difference]: Without dead ends: 17 [2022-11-23 16:07:37,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 16:07:37,444 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:07:37,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 16:07:37,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-23 16:07:37,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-23 16:07:37,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-23 16:07:37,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2022-11-23 16:07:37,482 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 7 [2022-11-23 16:07:37,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:07:37,482 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2022-11-23 16:07:37,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:07:37,483 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2022-11-23 16:07:37,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 16:07:37,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:07:37,483 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:07:37,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-23 16:07:37,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:07:37,700 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:07:37,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:07:37,701 INFO L85 PathProgramCache]: Analyzing trace with hash 178653015, now seen corresponding path program 1 times [2022-11-23 16:07:37,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:07:37,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1910052776] [2022-11-23 16:07:37,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:37,702 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:07:37,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:07:37,703 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:07:37,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-23 16:07:37,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:37,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 16:07:37,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:07:37,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:07:37,942 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:07:37,943 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:07:37,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1910052776] [2022-11-23 16:07:37,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1910052776] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:07:37,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:07:37,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:07:37,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787513651] [2022-11-23 16:07:37,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:07:37,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:07:37,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:07:37,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:07:37,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:07:37,947 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:07:38,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:07:38,001 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2022-11-23 16:07:38,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 16:07:38,002 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-23 16:07:38,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:07:38,002 INFO L225 Difference]: With dead ends: 28 [2022-11-23 16:07:38,003 INFO L226 Difference]: Without dead ends: 19 [2022-11-23 16:07:38,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:07:38,005 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:07:38,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 16:07:38,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-23 16:07:38,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-23 16:07:38,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-23 16:07:38,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2022-11-23 16:07:38,012 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 8 [2022-11-23 16:07:38,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:07:38,013 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2022-11-23 16:07:38,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:07:38,013 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2022-11-23 16:07:38,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 16:07:38,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:07:38,014 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:07:38,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-23 16:07:38,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:07:38,223 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:07:38,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:07:38,224 INFO L85 PathProgramCache]: Analyzing trace with hash 180321311, now seen corresponding path program 1 times [2022-11-23 16:07:38,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:07:38,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1967444879] [2022-11-23 16:07:38,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:38,225 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:07:38,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:07:38,226 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:07:38,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-23 16:07:38,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 16:07:38,362 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 16:07:38,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 16:07:38,482 ERROR L250 FreeRefinementEngine]: Caught unknown exception: Invalid model [2022-11-23 16:07:38,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1256819381] [2022-11-23 16:07:38,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:38,483 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 16:07:38,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 16:07:38,508 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 16:07:38,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-23 16:07:38,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:38,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 16:07:38,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:07:39,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:07:39,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:07:39,001 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:07:39,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1967444879] [2022-11-23 16:07:39,002 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 16:07:39,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1256819381] [2022-11-23 16:07:39,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1256819381] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:07:39,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:07:39,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 16:07:39,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278820451] [2022-11-23 16:07:39,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:07:39,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 16:07:39,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:07:39,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 16:07:39,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:07:39,013 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:07:41,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 16:07:43,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 16:07:45,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 16:07:47,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 16:07:50,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.43s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 16:07:52,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 16:07:54,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 16:07:57,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 16:07:59,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.33s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 16:07:59,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:07:59,534 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2022-11-23 16:07:59,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 16:07:59,630 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-23 16:07:59,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:07:59,633 INFO L225 Difference]: With dead ends: 33 [2022-11-23 16:07:59,633 INFO L226 Difference]: Without dead ends: 31 [2022-11-23 16:07:59,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-23 16:07:59,635 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 16 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.4s IncrementalHoareTripleChecker+Time [2022-11-23 16:07:59,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 74 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 8 Unknown, 0 Unchecked, 20.4s Time] [2022-11-23 16:07:59,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-23 16:07:59,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2022-11-23 16:07:59,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 19 states have internal predecessors, (21), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-23 16:07:59,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-11-23 16:07:59,646 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 8 [2022-11-23 16:07:59,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:07:59,646 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-11-23 16:07:59,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:07:59,647 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-11-23 16:07:59,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 16:07:59,647 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:07:59,648 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:07:59,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-23 16:07:59,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2022-11-23 16:08:00,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 16:08:00,049 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:08:00,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:08:00,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1242689983, now seen corresponding path program 1 times [2022-11-23 16:08:00,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:08:00,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1262023383] [2022-11-23 16:08:00,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:08:00,050 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:08:00,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:08:00,052 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:08:00,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-23 16:08:00,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 16:08:00,430 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 16:08:00,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 16:08:00,759 ERROR L250 FreeRefinementEngine]: Caught unknown exception: Invalid model [2022-11-23 16:08:00,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [939572633] [2022-11-23 16:08:00,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:08:00,760 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 16:08:00,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 16:08:00,761 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 16:08:00,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf26463b-a198-4bfd-8159-d0cb6641a122/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-23 16:08:01,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 16:08:01,318 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 16:08:01,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat