./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e46fdb43c1704e8aa9295c108b22e9521ffebb273e9060ca31abf40569948ab2 --- 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-8393723 [2022-11-18 19:53:26,492 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 19:53:26,495 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 19:53:26,527 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 19:53:26,527 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 19:53:26,529 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 19:53:26,532 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 19:53:26,534 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 19:53:26,537 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 19:53:26,539 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 19:53:26,541 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 19:53:26,543 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 19:53:26,544 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 19:53:26,546 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 19:53:26,548 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 19:53:26,550 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 19:53:26,552 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 19:53:26,554 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 19:53:26,557 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 19:53:26,560 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 19:53:26,563 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 19:53:26,565 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 19:53:26,567 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 19:53:26,569 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 19:53:26,575 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 19:53:26,576 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 19:53:26,576 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 19:53:26,578 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 19:53:26,579 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 19:53:26,581 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 19:53:26,582 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 19:53:26,583 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 19:53:26,585 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 19:53:26,586 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 19:53:26,588 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 19:53:26,589 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 19:53:26,590 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 19:53:26,591 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 19:53:26,591 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 19:53:26,593 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 19:53:26,594 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 19:53:26,604 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 19:53:26,654 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 19:53:26,660 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 19:53:26,662 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 19:53:26,662 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 19:53:26,665 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 19:53:26,665 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 19:53:26,666 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 19:53:26,667 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 19:53:26,667 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 19:53:26,668 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 19:53:26,669 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 19:53:26,670 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 19:53:26,670 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 19:53:26,670 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 19:53:26,671 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 19:53:26,671 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 19:53:26,671 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 19:53:26,672 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 19:53:26,672 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 19:53:26,672 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 19:53:26,673 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 19:53:26,673 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 19:53:26,674 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 19:53:26,674 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 19:53:26,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:53:26,675 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 19:53:26,675 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 19:53:26,675 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 19:53:26,676 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 19:53:26,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 19:53:26,676 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 19:53:26,677 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 19:53:26,677 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 19:53:26,678 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_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e46fdb43c1704e8aa9295c108b22e9521ffebb273e9060ca31abf40569948ab2 [2022-11-18 19:53:27,003 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 19:53:27,049 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 19:53:27,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 19:53:27,054 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 19:53:27,055 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 19:53:27,057 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound5.i [2022-11-18 19:53:27,164 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/data/d7f2108aa/c0edcae8478a4d49bdab3be3bb37409e/FLAG4821c903a [2022-11-18 19:53:27,855 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 19:53:27,856 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound5.i [2022-11-18 19:53:27,879 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/data/d7f2108aa/c0edcae8478a4d49bdab3be3bb37409e/FLAG4821c903a [2022-11-18 19:53:28,179 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/data/d7f2108aa/c0edcae8478a4d49bdab3be3bb37409e [2022-11-18 19:53:28,183 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 19:53:28,185 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 19:53:28,193 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 19:53:28,193 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 19:53:28,198 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 19:53:28,199 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:53:28" (1/1) ... [2022-11-18 19:53:28,201 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@384612c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:53:28, skipping insertion in model container [2022-11-18 19:53:28,201 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:53:28" (1/1) ... [2022-11-18 19:53:28,219 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 19:53:28,239 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:53:28,485 WARN L234 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_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound5.i[951,964] [2022-11-18 19:53:28,508 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:53:28,526 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 19:53:28,559 WARN L234 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_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound5.i[951,964] [2022-11-18 19:53:28,568 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:53:28,592 INFO L208 MainTranslator]: Completed translation [2022-11-18 19:53:28,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:53:28 WrapperNode [2022-11-18 19:53:28,593 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 19:53:28,596 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 19:53:28,596 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 19:53:28,596 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 19:53:28,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:53:28" (1/1) ... [2022-11-18 19:53:28,618 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:53:28" (1/1) ... [2022-11-18 19:53:28,647 INFO L138 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 51 [2022-11-18 19:53:28,647 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 19:53:28,648 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 19:53:28,648 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 19:53:28,648 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 19:53:28,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:53:28" (1/1) ... [2022-11-18 19:53:28,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:53:28" (1/1) ... [2022-11-18 19:53:28,683 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:53:28" (1/1) ... [2022-11-18 19:53:28,684 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:53:28" (1/1) ... [2022-11-18 19:53:28,689 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:53:28" (1/1) ... [2022-11-18 19:53:28,704 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:53:28" (1/1) ... [2022-11-18 19:53:28,708 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:53:28" (1/1) ... [2022-11-18 19:53:28,709 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:53:28" (1/1) ... [2022-11-18 19:53:28,712 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 19:53:28,721 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 19:53:28,722 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 19:53:28,722 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 19:53:28,723 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:53:28" (1/1) ... [2022-11-18 19:53:28,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:53:28,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:53:28,786 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 19:53:28,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 19:53:28,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 19:53:28,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 19:53:28,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 19:53:28,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 19:53:28,851 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-18 19:53:28,851 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-18 19:53:28,959 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 19:53:28,963 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 19:53:29,280 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 19:53:29,289 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 19:53:29,289 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 19:53:29,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:53:29 BoogieIcfgContainer [2022-11-18 19:53:29,293 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 19:53:29,299 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 19:53:29,299 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 19:53:29,304 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 19:53:29,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 07:53:28" (1/3) ... [2022-11-18 19:53:29,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@567e265c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:53:29, skipping insertion in model container [2022-11-18 19:53:29,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:53:28" (2/3) ... [2022-11-18 19:53:29,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@567e265c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:53:29, skipping insertion in model container [2022-11-18 19:53:29,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:53:29" (3/3) ... [2022-11-18 19:53:29,311 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound5.i [2022-11-18 19:53:29,339 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 19:53:29,339 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 19:53:29,457 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:53:29,474 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=PETRI_NET, 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;@54302f30, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:53:29,475 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 19:53:29,482 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 19:53:29,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-18 19:53:29,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:53:29,494 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:53:29,496 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:53:29,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:53:29,507 INFO L85 PathProgramCache]: Analyzing trace with hash 553144752, now seen corresponding path program 1 times [2022-11-18 19:53:29,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:53:29,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571708218] [2022-11-18 19:53:29,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:53:29,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:53:29,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:53:29,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:53:29,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571708218] [2022-11-18 19:53:29,735 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-18 19:53:29,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532585385] [2022-11-18 19:53:29,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:53:29,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:53:29,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:53:29,745 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:53:29,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 19:53:29,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:53:29,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-18 19:53:29,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:53:29,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:53:29,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:53:29,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532585385] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:53:29,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:53:29,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:53:29,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165238588] [2022-11-18 19:53:29,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:53:29,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 19:53:29,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:53:29,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 19:53:29,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 19:53:29,937 INFO L87 Difference]: Start difference. First operand has 21 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2022-11-18 19:53:29,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:53:29,967 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2022-11-18 19:53:29,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 19:53:29,970 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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 [2022-11-18 19:53:29,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:53:29,981 INFO L225 Difference]: With dead ends: 37 [2022-11-18 19:53:29,981 INFO L226 Difference]: Without dead ends: 17 [2022-11-18 19:53:29,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 19:53:29,990 INFO L413 NwaCegarLoop]: 26 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, 26 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 [2022-11-18 19:53:29,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:53:30,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-18 19:53:30,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-18 19:53:30,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-18 19:53:30,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2022-11-18 19:53:30,044 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 8 [2022-11-18 19:53:30,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:53:30,045 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2022-11-18 19:53:30,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2022-11-18 19:53:30,046 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2022-11-18 19:53:30,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 19:53:30,047 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:53:30,047 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:53:30,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 19:53:30,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-18 19:53:30,256 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:53:30,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:53:30,257 INFO L85 PathProgramCache]: Analyzing trace with hash -803059042, now seen corresponding path program 1 times [2022-11-18 19:53:30,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:53:30,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845772506] [2022-11-18 19:53:30,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:53:30,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:53:30,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:53:30,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:53:30,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845772506] [2022-11-18 19:53:30,348 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-18 19:53:30,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381995268] [2022-11-18 19:53:30,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:53:30,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:53:30,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:53:30,353 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:53:30,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 19:53:30,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:53:30,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 19:53:30,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:53:30,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:53:30,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:53:30,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381995268] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:53:30,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:53:30,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:53:30,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183164035] [2022-11-18 19:53:30,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:53:30,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:53:30,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:53:30,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:53:30,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:53:30,598 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-11-18 19:53:30,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:53:30,656 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2022-11-18 19:53:30,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 19:53:30,662 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 10 [2022-11-18 19:53:30,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:53:30,664 INFO L225 Difference]: With dead ends: 31 [2022-11-18 19:53:30,669 INFO L226 Difference]: Without dead ends: 19 [2022-11-18 19:53:30,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:53:30,671 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 55 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 [2022-11-18 19:53:30,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:53:30,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-18 19:53:30,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-18 19:53:30,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-18 19:53:30,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2022-11-18 19:53:30,680 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2022-11-18 19:53:30,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:53:30,680 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2022-11-18 19:53:30,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-11-18 19:53:30,683 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2022-11-18 19:53:30,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 19:53:30,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:53:30,687 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:53:30,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 19:53:30,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:53:30,905 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:53:30,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:53:30,906 INFO L85 PathProgramCache]: Analyzing trace with hash 549278495, now seen corresponding path program 1 times [2022-11-18 19:53:30,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:53:30,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440544997] [2022-11-18 19:53:30,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:53:30,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:53:30,963 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 19:53:30,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [788788459] [2022-11-18 19:53:30,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:53:30,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:53:30,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:53:30,976 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:53:30,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 19:53:31,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:53:31,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 19:53:31,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:53:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:53:31,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:53:31,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:53:31,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440544997] [2022-11-18 19:53:31,120 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 19:53:31,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788788459] [2022-11-18 19:53:31,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788788459] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:53:31,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:53:31,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:53:31,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686844138] [2022-11-18 19:53:31,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:53:31,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:53:31,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:53:31,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:53:31,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:53:31,125 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-11-18 19:53:31,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:53:31,182 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2022-11-18 19:53:31,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:53:31,184 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 11 [2022-11-18 19:53:31,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:53:31,185 INFO L225 Difference]: With dead ends: 30 [2022-11-18 19:53:31,185 INFO L226 Difference]: Without dead ends: 23 [2022-11-18 19:53:31,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:53:31,188 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:53:31,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 56 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:53:31,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-18 19:53:31,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-11-18 19:53:31,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-18 19:53:31,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2022-11-18 19:53:31,196 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 11 [2022-11-18 19:53:31,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:53:31,197 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2022-11-18 19:53:31,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-11-18 19:53:31,198 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2022-11-18 19:53:31,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 19:53:31,199 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:53:31,199 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:53:31,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 19:53:31,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:53:31,408 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:53:31,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:53:31,409 INFO L85 PathProgramCache]: Analyzing trace with hash 551065955, now seen corresponding path program 1 times [2022-11-18 19:53:31,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:53:31,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627541999] [2022-11-18 19:53:31,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:53:31,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:53:31,441 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 19:53:31,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [135003758] [2022-11-18 19:53:31,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:53:31,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:53:31,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:53:31,453 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:53:31,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 19:53:31,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:53:31,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 19:53:31,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:53:31,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:53:31,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:53:31,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:53:31,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627541999] [2022-11-18 19:53:31,714 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 19:53:31,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135003758] [2022-11-18 19:53:31,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135003758] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:53:31,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:53:31,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 19:53:31,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157335765] [2022-11-18 19:53:31,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:53:31,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:53:31,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:53:31,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:53:31,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:53:31,719 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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) [2022-11-18 19:53:31,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:53:31,813 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-11-18 19:53:31,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:53:31,814 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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 11 [2022-11-18 19:53:31,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:53:31,815 INFO L225 Difference]: With dead ends: 31 [2022-11-18 19:53:31,816 INFO L226 Difference]: Without dead ends: 28 [2022-11-18 19:53:31,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:53:31,818 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 10 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:53:31,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 59 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 19:53:31,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-18 19:53:31,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-18 19:53:31,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 19:53:31,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-11-18 19:53:31,829 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 11 [2022-11-18 19:53:31,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:53:31,830 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-11-18 19:53:31,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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) [2022-11-18 19:53:31,830 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-11-18 19:53:31,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:53:31,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:53:31,832 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:53:31,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 19:53:32,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-18 19:53:32,042 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:53:32,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:53:32,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1647533572, now seen corresponding path program 1 times [2022-11-18 19:53:32,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:53:32,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932478685] [2022-11-18 19:53:32,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:53:32,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:53:32,070 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 19:53:32,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [993549902] [2022-11-18 19:53:32,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:53:32,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:53:32,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:53:32,082 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:53:32,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 19:53:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:53:32,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 19:53:32,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:53:32,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:53:32,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:53:32,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:53:32,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:53:32,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932478685] [2022-11-18 19:53:32,300 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 19:53:32,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993549902] [2022-11-18 19:53:32,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993549902] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:53:32,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:53:32,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-18 19:53:32,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831544886] [2022-11-18 19:53:32,302 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:53:32,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 19:53:32,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:53:32,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 19:53:32,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-18 19:53:32,305 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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) [2022-11-18 19:53:32,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:53:32,416 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2022-11-18 19:53:32,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 19:53:32,418 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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 13 [2022-11-18 19:53:32,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:53:32,419 INFO L225 Difference]: With dead ends: 62 [2022-11-18 19:53:32,420 INFO L226 Difference]: Without dead ends: 50 [2022-11-18 19:53:32,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:53:32,422 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 42 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:53:32,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 107 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 19:53:32,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-18 19:53:32,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2022-11-18 19:53:32,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.3) internal successors, (39), 31 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 19:53:32,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2022-11-18 19:53:32,441 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 13 [2022-11-18 19:53:32,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:53:32,441 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2022-11-18 19:53:32,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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) [2022-11-18 19:53:32,442 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2022-11-18 19:53:32,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 19:53:32,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:53:32,445 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:53:32,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 19:53:32,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:53:32,668 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:53:32,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:53:32,669 INFO L85 PathProgramCache]: Analyzing trace with hash -791761799, now seen corresponding path program 1 times [2022-11-18 19:53:32,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:53:32,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84218480] [2022-11-18 19:53:32,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:53:32,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:53:32,709 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 19:53:32,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2146698766] [2022-11-18 19:53:32,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:53:32,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:53:32,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:53:32,712 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:53:32,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 19:53:32,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:53:32,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 19:53:32,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:53:32,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:53:32,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:53:32,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:53:32,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:53:32,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84218480] [2022-11-18 19:53:32,947 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 19:53:32,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146698766] [2022-11-18 19:53:32,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146698766] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:53:32,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:53:32,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-18 19:53:32,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812224053] [2022-11-18 19:53:32,949 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:53:32,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 19:53:32,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:53:32,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 19:53:32,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-18 19:53:32,955 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 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) [2022-11-18 19:53:33,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:53:33,134 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2022-11-18 19:53:33,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 19:53:33,136 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 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 14 [2022-11-18 19:53:33,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:53:33,141 INFO L225 Difference]: With dead ends: 72 [2022-11-18 19:53:33,142 INFO L226 Difference]: Without dead ends: 65 [2022-11-18 19:53:33,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-18 19:53:33,147 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 54 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:53:33,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 104 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 19:53:33,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-18 19:53:33,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2022-11-18 19:53:33,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 51 states have internal predecessors, (65), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-18 19:53:33,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2022-11-18 19:53:33,178 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 14 [2022-11-18 19:53:33,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:53:33,179 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2022-11-18 19:53:33,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 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) [2022-11-18 19:53:33,180 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2022-11-18 19:53:33,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 19:53:33,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:53:33,183 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:53:33,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 19:53:33,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:53:33,396 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:53:33,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:53:33,397 INFO L85 PathProgramCache]: Analyzing trace with hash -789974339, now seen corresponding path program 1 times [2022-11-18 19:53:33,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:53:33,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489601089] [2022-11-18 19:53:33,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:53:33,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:53:33,416 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 19:53:33,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [336348360] [2022-11-18 19:53:33,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:53:33,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:53:33,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:53:33,432 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:53:33,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 19:53:33,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:53:33,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 19:53:33,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:53:33,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:53:33,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:53:33,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:53:33,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489601089] [2022-11-18 19:53:33,658 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 19:53:33,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336348360] [2022-11-18 19:53:33,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336348360] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:53:33,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:53:33,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:53:33,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778478606] [2022-11-18 19:53:33,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:53:33,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:53:33,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:53:33,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:53:33,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:53:33,661 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-11-18 19:53:33,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:53:33,770 INFO L93 Difference]: Finished difference Result 94 states and 119 transitions. [2022-11-18 19:53:33,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:53:33,772 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 14 [2022-11-18 19:53:33,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:53:33,774 INFO L225 Difference]: With dead ends: 94 [2022-11-18 19:53:33,774 INFO L226 Difference]: Without dead ends: 89 [2022-11-18 19:53:33,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:53:33,776 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 9 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:53:33,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 50 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 19:53:33,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-18 19:53:33,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2022-11-18 19:53:33,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 68 states have (on average 1.2794117647058822) internal successors, (87), 71 states have internal predecessors, (87), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-18 19:53:33,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2022-11-18 19:53:33,811 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 14 [2022-11-18 19:53:33,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:53:33,812 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2022-11-18 19:53:33,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-11-18 19:53:33,813 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2022-11-18 19:53:33,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-18 19:53:33,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:53:33,814 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:53:33,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 19:53:34,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:53:34,022 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:53:34,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:53:34,022 INFO L85 PathProgramCache]: Analyzing trace with hash 2118336314, now seen corresponding path program 1 times [2022-11-18 19:53:34,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:53:34,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897245143] [2022-11-18 19:53:34,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:53:34,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:53:34,039 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 19:53:34,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1183155226] [2022-11-18 19:53:34,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:53:34,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:53:34,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:53:34,042 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:53:34,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 19:53:34,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:53:34,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 19:53:34,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:53:34,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:53:34,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:53:34,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:53:34,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897245143] [2022-11-18 19:53:34,178 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 19:53:34,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183155226] [2022-11-18 19:53:34,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183155226] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:53:34,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:53:34,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:53:34,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951468502] [2022-11-18 19:53:34,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:53:34,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:53:34,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:53:34,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:53:34,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:53:34,182 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-18 19:53:34,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:53:34,216 INFO L93 Difference]: Finished difference Result 137 states and 164 transitions. [2022-11-18 19:53:34,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:53:34,217 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-11-18 19:53:34,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:53:34,218 INFO L225 Difference]: With dead ends: 137 [2022-11-18 19:53:34,219 INFO L226 Difference]: Without dead ends: 67 [2022-11-18 19:53:34,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:53:34,221 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:53:34,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:53:34,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-18 19:53:34,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-11-18 19:53:34,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 56 states have internal predecessors, (68), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-18 19:53:34,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2022-11-18 19:53:34,239 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 20 [2022-11-18 19:53:34,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:53:34,240 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2022-11-18 19:53:34,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-18 19:53:34,240 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2022-11-18 19:53:34,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-18 19:53:34,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:53:34,242 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:53:34,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 19:53:34,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:53:34,461 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:53:34,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:53:34,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1149777120, now seen corresponding path program 1 times [2022-11-18 19:53:34,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:53:34,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394746913] [2022-11-18 19:53:34,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:53:34,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:53:34,479 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 19:53:34,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [639799528] [2022-11-18 19:53:34,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:53:34,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:53:34,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:53:34,482 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:53:34,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 19:53:34,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:53:34,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-18 19:53:34,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:53:35,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:53:35,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:54:16,156 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse1 (mod |c_ULTIMATE.start_main_~b~0#1| 2147483648)) (.cse2 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (or (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967296) .cse0)) (= (mod (+ |c_ULTIMATE.start_main_~r~0#1| (* 2 .cse1 |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) .cse0) (<= (* 2 .cse1) .cse2) (not (<= (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296) .cse2)))) is different from true [2022-11-18 19:54:44,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-11-18 19:54:44,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:54:44,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394746913] [2022-11-18 19:54:44,694 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 19:54:44,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639799528] [2022-11-18 19:54:44,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639799528] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:54:44,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:54:44,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2022-11-18 19:54:44,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399184804] [2022-11-18 19:54:44,695 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:54:44,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 19:54:44,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:54:44,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 19:54:44,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=214, Unknown=2, NotChecked=30, Total=306 [2022-11-18 19:54:44,697 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 states have internal predecessors, (37), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 19:54:47,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 19:54:49,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 19:54:54,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 19:54:58,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 19:54:59,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:54:59,526 INFO L93 Difference]: Finished difference Result 114 states and 133 transitions. [2022-11-18 19:54:59,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 19:54:59,527 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 states have internal predecessors, (37), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2022-11-18 19:54:59,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:54:59,529 INFO L225 Difference]: With dead ends: 114 [2022-11-18 19:54:59,530 INFO L226 Difference]: Without dead ends: 80 [2022-11-18 19:54:59,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=85, Invalid=297, Unknown=2, NotChecked=36, Total=420 [2022-11-18 19:54:59,531 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 43 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 29 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2022-11-18 19:54:59,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 123 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 168 Invalid, 4 Unknown, 39 Unchecked, 12.8s Time] [2022-11-18 19:54:59,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-18 19:54:59,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2022-11-18 19:54:59,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 61 states have internal predecessors, (69), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-18 19:54:59,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2022-11-18 19:54:59,561 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 23 [2022-11-18 19:54:59,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:54:59,562 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2022-11-18 19:54:59,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 states have internal predecessors, (37), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 19:54:59,562 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2022-11-18 19:54:59,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-18 19:54:59,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:54:59,566 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:54:59,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 19:54:59,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:54:59,772 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:54:59,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:54:59,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1350184604, now seen corresponding path program 1 times [2022-11-18 19:54:59,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:54:59,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663052506] [2022-11-18 19:54:59,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:54:59,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:54:59,796 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 19:54:59,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1444784415] [2022-11-18 19:54:59,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:54:59,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:54:59,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:54:59,800 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:54:59,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 19:54:59,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:54:59,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-18 19:54:59,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:55:00,392 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:55:00,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:55:30,771 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse1 (mod |c_ULTIMATE.start_main_~b~0#1| 2147483648)) (.cse2 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (or (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967296) .cse0)) (= (mod (+ |c_ULTIMATE.start_main_~r~0#1| (* 2 .cse1 |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) .cse0) (<= (* 2 .cse1) .cse2) (not (<= (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296) .cse2)))) is different from true [2022-11-18 19:56:10,946 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse1 (mod |c_ULTIMATE.start_main_~b~0#1| 1073741824)) (.cse2 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (or (= .cse0 (mod (+ |c_ULTIMATE.start_main_~r~0#1| (* .cse1 4 |c_ULTIMATE.start_main_~q~0#1|)) 4294967296)) (not (<= (* 2 (mod |c_ULTIMATE.start_main_~b~0#1| 2147483648)) .cse2)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~b~0#1| 4 |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967296) .cse0)) (<= (* .cse1 4) .cse2))) is different from true [2022-11-18 19:56:53,572 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse2 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse0 (mod |c_ULTIMATE.start_main_~b~0#1| 536870912)) (.cse1 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (or (<= (* 8 .cse0) .cse1) (not (= .cse2 (mod (+ (* 8 |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967296))) (= .cse2 (mod (+ (* 8 .cse0 |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967296)) (not (<= (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296) .cse1)) (not (<= (* (mod |c_ULTIMATE.start_main_~b~0#1| 1073741824) 4) .cse1)))) is different from true [2022-11-18 19:57:26,367 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 18 not checked. [2022-11-18 19:57:26,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:57:26,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663052506] [2022-11-18 19:57:26,368 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 19:57:26,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444784415] [2022-11-18 19:57:26,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444784415] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:57:26,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:57:26,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2022-11-18 19:57:26,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581041256] [2022-11-18 19:57:26,368 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:57:26,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-18 19:57:26,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:57:26,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-18 19:57:26,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=271, Unknown=4, NotChecked=108, Total=462 [2022-11-18 19:57:26,370 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 20 states have internal predecessors, (49), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 19:57:28,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 19:57:33,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 19:57:35,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 19:57:36,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 19:57:39,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 19:57:43,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 19:57:45,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 19:57:48,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 19:57:49,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 19:57:52,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 19:57:53,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 19:57:54,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 19:57:55,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:57:55,073 INFO L93 Difference]: Finished difference Result 145 states and 176 transitions. [2022-11-18 19:57:55,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 19:57:55,074 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 20 states have internal predecessors, (49), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-11-18 19:57:55,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:57:55,075 INFO L225 Difference]: With dead ends: 145 [2022-11-18 19:57:55,075 INFO L226 Difference]: Without dead ends: 121 [2022-11-18 19:57:55,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=107, Invalid=363, Unknown=4, NotChecked=126, Total=600 [2022-11-18 19:57:55,077 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 68 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 44 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 27.5s IncrementalHoareTripleChecker+Time [2022-11-18 19:57:55,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 219 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 285 Invalid, 6 Unknown, 234 Unchecked, 27.5s Time] [2022-11-18 19:57:55,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-18 19:57:55,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-11-18 19:57:55,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 97 states have (on average 1.1855670103092784) internal successors, (115), 101 states have internal predecessors, (115), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-18 19:57:55,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 144 transitions. [2022-11-18 19:57:55,126 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 144 transitions. Word has length 29 [2022-11-18 19:57:55,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:57:55,126 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 144 transitions. [2022-11-18 19:57:55,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 20 states have internal predecessors, (49), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 19:57:55,126 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 144 transitions. [2022-11-18 19:57:55,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-18 19:57:55,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:57:55,129 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-18 19:57:55,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 19:57:55,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 19:57:55,329 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:57:55,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:57:55,330 INFO L85 PathProgramCache]: Analyzing trace with hash -815549923, now seen corresponding path program 2 times [2022-11-18 19:57:55,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:57:55,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064007972] [2022-11-18 19:57:55,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:57:55,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:57:55,340 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 19:57:55,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [87629087] [2022-11-18 19:57:55,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:57:55,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:57:55,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:57:55,342 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:57:55,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 19:57:55,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:57:55,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:57:55,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 19:57:55,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:57:55,712 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 19:57:55,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:57:56,138 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 19:57:56,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:57:56,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064007972] [2022-11-18 19:57:56,139 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 19:57:56,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87629087] [2022-11-18 19:57:56,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87629087] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:57:56,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:57:56,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2022-11-18 19:57:56,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586665813] [2022-11-18 19:57:56,140 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:57:56,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 19:57:56,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:57:56,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 19:57:56,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:57:56,141 INFO L87 Difference]: Start difference. First operand 121 states and 144 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-18 19:57:56,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:57:56,986 INFO L93 Difference]: Finished difference Result 150 states and 180 transitions. [2022-11-18 19:57:56,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 19:57:56,987 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 32 [2022-11-18 19:57:56,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:57:56,988 INFO L225 Difference]: With dead ends: 150 [2022-11-18 19:57:56,988 INFO L226 Difference]: Without dead ends: 118 [2022-11-18 19:57:56,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:57:56,989 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 19:57:56,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 120 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-18 19:57:56,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-18 19:57:57,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 101. [2022-11-18 19:57:57,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 85 states have internal predecessors, (97), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-18 19:57:57,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 122 transitions. [2022-11-18 19:57:57,014 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 122 transitions. Word has length 32 [2022-11-18 19:57:57,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:57:57,014 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 122 transitions. [2022-11-18 19:57:57,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-18 19:57:57,015 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 122 transitions. [2022-11-18 19:57:57,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-18 19:57:57,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:57:57,016 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:57:57,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 19:57:57,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:57:57,223 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:57:57,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:57:57,224 INFO L85 PathProgramCache]: Analyzing trace with hash 81521713, now seen corresponding path program 1 times [2022-11-18 19:57:57,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:57:57,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355063634] [2022-11-18 19:57:57,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:57:57,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:57:57,241 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 19:57:57,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1303845231] [2022-11-18 19:57:57,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:57:57,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:57:57,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:57:57,243 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:57:57,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 19:57:57,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:57,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 19:57:57,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:57:57,330 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-18 19:57:57,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:57:57,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:57:57,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355063634] [2022-11-18 19:57:57,331 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 19:57:57,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303845231] [2022-11-18 19:57:57,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303845231] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:57:57,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:57:57,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:57:57,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110722207] [2022-11-18 19:57:57,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:57:57,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:57:57,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:57:57,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:57:57,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:57:57,333 INFO L87 Difference]: Start difference. First operand 101 states and 122 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-18 19:57:57,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:57:57,387 INFO L93 Difference]: Finished difference Result 143 states and 169 transitions. [2022-11-18 19:57:57,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:57:57,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-11-18 19:57:57,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:57:57,389 INFO L225 Difference]: With dead ends: 143 [2022-11-18 19:57:57,390 INFO L226 Difference]: Without dead ends: 101 [2022-11-18 19:57:57,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:57:57,391 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:57:57,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 65 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:57:57,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-18 19:57:57,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-11-18 19:57:57,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 81 states have (on average 1.1728395061728396) internal successors, (95), 85 states have internal predecessors, (95), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-18 19:57:57,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 120 transitions. [2022-11-18 19:57:57,416 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 120 transitions. Word has length 34 [2022-11-18 19:57:57,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:57:57,417 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 120 transitions. [2022-11-18 19:57:57,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-18 19:57:57,417 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 120 transitions. [2022-11-18 19:57:57,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-18 19:57:57,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:57:57,419 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:57:57,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 19:57:57,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:57:57,626 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:57:57,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:57:57,626 INFO L85 PathProgramCache]: Analyzing trace with hash -2053011364, now seen corresponding path program 2 times [2022-11-18 19:57:57,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:57:57,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200862380] [2022-11-18 19:57:57,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:57:57,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:57:57,648 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 19:57:57,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1926881149] [2022-11-18 19:57:57,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:57:57,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:57:57,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:57:57,658 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:57:57,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 19:57:57,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:57:57,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:57:57,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 19:57:57,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:57:57,809 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 19:57:57,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:57:57,899 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 42 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:57:57,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:57:57,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200862380] [2022-11-18 19:57:57,899 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 19:57:57,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926881149] [2022-11-18 19:57:57,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926881149] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:57:57,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:57:57,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2022-11-18 19:57:57,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955310173] [2022-11-18 19:57:57,900 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:57:57,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 19:57:57,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:57:57,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 19:57:57,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-18 19:57:57,901 INFO L87 Difference]: Start difference. First operand 101 states and 120 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 19:57:57,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:57:57,972 INFO L93 Difference]: Finished difference Result 124 states and 146 transitions. [2022-11-18 19:57:57,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:57:57,973 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2022-11-18 19:57:57,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:57:57,975 INFO L225 Difference]: With dead ends: 124 [2022-11-18 19:57:57,975 INFO L226 Difference]: Without dead ends: 98 [2022-11-18 19:57:57,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 54 SyntacticMatches, 7 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:57:57,976 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 31 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:57:57,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 92 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:57:57,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-18 19:57:57,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-11-18 19:57:57,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 78 states have (on average 1.1538461538461537) internal successors, (90), 82 states have internal predecessors, (90), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-18 19:57:57,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 115 transitions. [2022-11-18 19:57:57,999 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 115 transitions. Word has length 35 [2022-11-18 19:57:58,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:57:58,000 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 115 transitions. [2022-11-18 19:57:58,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 19:57:58,000 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 115 transitions. [2022-11-18 19:57:58,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-18 19:57:58,002 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:57:58,002 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:57:58,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 19:57:58,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 19:57:58,209 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:57:58,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:57:58,209 INFO L85 PathProgramCache]: Analyzing trace with hash 2145998975, now seen corresponding path program 3 times [2022-11-18 19:57:58,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:57:58,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989594] [2022-11-18 19:57:58,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:57:58,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:57:58,223 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 19:57:58,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [383009625] [2022-11-18 19:57:58,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:57:58,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:57:58,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:57:58,237 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:57:58,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 20:01:49,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 20:01:49,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:01:49,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-18 20:01:49,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:01:53,254 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 20:01:53,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:02:21,985 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296))) (let ((.cse2 (div .cse0 2)) (.cse3 (* 4294967295 |c_ULTIMATE.start_main_~b~0#1|)) (.cse1 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296))) (or (= .cse0 (mod |c_ULTIMATE.start_main_~B~0#1| 4294967296)) (not (= .cse1 (mod (+ |c_ULTIMATE.start_main_~r~0#1| (* |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296))) (not (<= (mod .cse2 4294967296) (mod (+ |c_ULTIMATE.start_main_~r~0#1| .cse3) 4294967296))) (not (<= .cse0 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (= (mod (+ (* 2 .cse2) |c_ULTIMATE.start_main_~r~0#1| (* 2 .cse2 |c_ULTIMATE.start_main_~q~0#1|) .cse3) 4294967296) .cse1)))) is different from true [2022-11-18 20:04:02,017 WARN L233 SmtUtils]: Spent 9.95s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:04:16,895 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 24 proven. 9 refuted. 3 times theorem prover too weak. 10 trivial. 1 not checked. [2022-11-18 20:04:16,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:04:16,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989594] [2022-11-18 20:04:16,896 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:04:16,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383009625] [2022-11-18 20:04:16,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383009625] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:04:16,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:04:16,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2022-11-18 20:04:16,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578014219] [2022-11-18 20:04:16,897 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:04:16,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 20:04:16,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:04:16,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 20:04:16,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=403, Unknown=8, NotChecked=42, Total=552 [2022-11-18 20:04:16,900 INFO L87 Difference]: Start difference. First operand 98 states and 115 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 22 states have internal predecessors, (56), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-18 20:04:31,321 WARN L233 SmtUtils]: Spent 12.35s on a formula simplification. DAG size of input: 70 DAG size of output: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:04:33,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:04:35,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:04:38,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:04:40,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:04:44,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:04:48,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:04:51,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:04:53,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:04:56,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:04:58,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:05:01,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:05:02,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:05:04,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:05:07,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:05:09,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:05:15,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:05:17,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:05:19,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:05:20,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:05:22,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:05:24,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:05:26,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:05:28,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:05:30,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:05:35,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:05:37,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:05:39,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:05:41,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:05:43,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:05:45,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:05:48,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:05:52,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:05:54,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:05:56,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:05:58,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:06:24,774 WARN L233 SmtUtils]: Spent 15.00s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:06:27,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:06:28,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:06:30,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:06:33,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:06:34,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:06:35,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:06:37,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:06:43,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:06:45,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:06:46,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:06:46,048 INFO L93 Difference]: Finished difference Result 159 states and 193 transitions. [2022-11-18 20:06:46,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 20:06:46,049 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 22 states have internal predecessors, (56), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2022-11-18 20:06:46,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:06:46,050 INFO L225 Difference]: With dead ends: 159 [2022-11-18 20:06:46,051 INFO L226 Difference]: Without dead ends: 154 [2022-11-18 20:06:46,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 101.1s TimeCoverageRelationStatistics Valid=157, Invalid=648, Unknown=11, NotChecked=54, Total=870 [2022-11-18 20:06:46,052 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 93 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 66 mSolverCounterUnsat, 23 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 101.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 23 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 102.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:06:46,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 233 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 306 Invalid, 23 Unknown, 61 Unchecked, 102.3s Time] [2022-11-18 20:06:46,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-18 20:06:46,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 122. [2022-11-18 20:06:46,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 97 states have (on average 1.1546391752577319) internal successors, (112), 101 states have internal predecessors, (112), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (16), 12 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-18 20:06:46,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 145 transitions. [2022-11-18 20:06:46,098 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 145 transitions. Word has length 41 [2022-11-18 20:06:46,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:06:46,098 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 145 transitions. [2022-11-18 20:06:46,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 22 states have internal predecessors, (56), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-18 20:06:46,099 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 145 transitions. [2022-11-18 20:06:46,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-18 20:06:46,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:06:46,100 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:06:46,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 20:06:46,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 20:06:46,317 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:06:46,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:06:46,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1615195818, now seen corresponding path program 4 times [2022-11-18 20:06:46,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:06:46,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613160990] [2022-11-18 20:06:46,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:06:46,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:06:46,336 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:06:46,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [558089747] [2022-11-18 20:06:46,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:06:46,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:06:46,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:06:46,347 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:06:46,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 20:06:46,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:06:46,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:06:46,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 20:06:46,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:06:46,563 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 44 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:06:46,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:06:46,653 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:06:46,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:06:46,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613160990] [2022-11-18 20:06:46,654 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:06:46,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558089747] [2022-11-18 20:06:46,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558089747] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:06:46,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:06:46,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2022-11-18 20:06:46,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571310583] [2022-11-18 20:06:46,655 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:06:46,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:06:46,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:06:46,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:06:46,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:06:46,657 INFO L87 Difference]: Start difference. First operand 122 states and 145 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-18 20:06:46,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:06:46,732 INFO L93 Difference]: Finished difference Result 128 states and 150 transitions. [2022-11-18 20:06:46,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:06:46,733 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 44 [2022-11-18 20:06:46,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:06:46,734 INFO L225 Difference]: With dead ends: 128 [2022-11-18 20:06:46,734 INFO L226 Difference]: Without dead ends: 0 [2022-11-18 20:06:46,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 7 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:06:46,735 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 40 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:06:46,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 86 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:06:46,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-18 20:06:46,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-18 20:06:46,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:06:46,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-18 20:06:46,737 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 44 [2022-11-18 20:06:46,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:06:46,737 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-18 20:06:46,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-18 20:06:46,738 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-18 20:06:46,738 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-18 20:06:46,741 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-18 20:06:46,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 20:06:46,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 20:06:46,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-18 20:06:56,031 WARN L233 SmtUtils]: Spent 8.98s on a formula simplification. DAG size of input: 188 DAG size of output: 71 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-18 20:07:04,377 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-18 20:07:04,377 INFO L899 garLoopResultBuilder]: For program point L48(line 48) no Hoare annotation was computed. [2022-11-18 20:07:04,377 INFO L899 garLoopResultBuilder]: For program point L38(lines 38 47) no Hoare annotation was computed. [2022-11-18 20:07:04,378 INFO L895 garLoopResultBuilder]: At program point L38-2(lines 38 47) the Hoare annotation is: (= (mod |ULTIMATE.start_main_~A~0#1| 4294967296) (mod (+ |ULTIMATE.start_main_~r~0#1| (* |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~q~0#1|)) 4294967296)) [2022-11-18 20:07:04,378 INFO L899 garLoopResultBuilder]: For program point L34-1(lines 34 37) no Hoare annotation was computed. [2022-11-18 20:07:04,378 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-11-18 20:07:04,378 INFO L895 garLoopResultBuilder]: At program point L34-3(lines 34 37) the Hoare annotation is: (let ((.cse4 (mod |ULTIMATE.start_main_~r~0#1| 4294967296))) (let ((.cse2 (<= 1 .cse4)) (.cse0 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse1 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse3 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and .cse0 .cse1 (<= 5 ~counter~0)) (and (<= 2 ~counter~0) (= |ULTIMATE.start_main_~b~0#1| 4) .cse2 .cse0 .cse1 .cse3 (<= ~counter~0 2)) (and (= |ULTIMATE.start_main_~b~0#1| 8) .cse0 .cse1 (<= 4 .cse4) .cse3 (<= 3 ~counter~0)) (and (<= 0 ~counter~0) (<= ~counter~0 0) .cse0 (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~b~0#1|) .cse1 .cse3) (and (<= ~counter~0 1) (<= 1 ~counter~0) .cse2 .cse0 .cse1 (= 2 |ULTIMATE.start_main_~b~0#1|) .cse3) (and .cse0 .cse1 (<= 4 ~counter~0) .cse3 (= (mod |ULTIMATE.start_main_~b~0#1| 2) 0) (= (mod (div (- |ULTIMATE.start_main_~b~0#1|) (- 2)) 2) 0))))) [2022-11-18 20:07:04,379 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-18 20:07:04,379 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-11-18 20:07:04,379 INFO L902 garLoopResultBuilder]: At program point L49(lines 26 50) the Hoare annotation is: true [2022-11-18 20:07:04,379 INFO L899 garLoopResultBuilder]: For program point L43(lines 43 46) no Hoare annotation was computed. [2022-11-18 20:07:04,380 INFO L895 garLoopResultBuilder]: At program point L43-2(lines 26 50) the Hoare annotation is: (let ((.cse8 (mod |ULTIMATE.start_main_~b~0#1| 4294967296)) (.cse16 (mod |ULTIMATE.start_main_~r~0#1| 4294967296)) (.cse13 (+ |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~r~0#1|))) (let ((.cse10 (= |ULTIMATE.start_main_~q~0#1| 1)) (.cse11 (= .cse13 |ULTIMATE.start_main_~A~0#1|)) (.cse2 (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~b~0#1|)) (.cse15 (< ~counter~0 4)) (.cse0 (not (<= .cse8 .cse16))) (.cse5 (<= 1 .cse16)) (.cse1 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse3 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse6 (= 2 |ULTIMATE.start_main_~b~0#1|)) (.cse12 (<= 4 ~counter~0)) (.cse4 (= |ULTIMATE.start_main_~B~0#1| 1)) (.cse14 (mod |ULTIMATE.start_main_~A~0#1| 4294967296))) (or (and .cse0 (<= ~counter~0 1) .cse1 .cse2 .cse3 .cse4) (and .cse0 .cse5 .cse1 .cse3 .cse6 .cse4 (<= ~counter~0 2)) (let ((.cse9 (mod .cse13 4294967296)) (.cse7 (div |ULTIMATE.start_main_~b~0#1| 2))) (and (< .cse7 1073741824) (<= .cse8 .cse9) .cse10 .cse11 .cse12 (<= 0 .cse7) .cse4 (= (mod |ULTIMATE.start_main_~b~0#1| 2) 0) (<= (+ .cse9 1) (+ (* 4 .cse7) (* (div (+ (- .cse7) 1073741823) 1073741824) 4294967296))))) (and (not (<= 2 .cse14)) .cse15 .cse10 .cse11 .cse2 (<= 1 .cse14) .cse4) (and (= |ULTIMATE.start_main_~b~0#1| 8) .cse0 .cse1 .cse3 (<= 4 .cse16) .cse12 .cse4) (and .cse0 (= |ULTIMATE.start_main_~b~0#1| 4) .cse15 .cse5 .cse1 .cse3 .cse4 (<= 3 ~counter~0)) (and .cse0 .cse5 .cse1 .cse3 .cse6 .cse12 .cse4) (and (<= 5 ~counter~0) (= .cse14 (mod (+ |ULTIMATE.start_main_~r~0#1| (* |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~q~0#1|)) 4294967296)))))) [2022-11-18 20:07:04,380 INFO L895 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (let ((.cse16 (+ |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse9 (mod |ULTIMATE.start_main_~b~0#1| 4294967296)) (.cse6 (mod |ULTIMATE.start_main_~r~0#1| 4294967296))) (let ((.cse4 (= 2 |ULTIMATE.start_main_~b~0#1|)) (.cse0 (not (<= .cse9 .cse6))) (.cse1 (<= 1 .cse6)) (.cse2 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse3 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse8 (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~b~0#1|)) (.cse10 (< ~counter~0 5)) (.cse12 (= |ULTIMATE.start_main_~q~0#1| 1)) (.cse13 (= .cse16 |ULTIMATE.start_main_~A~0#1|)) (.cse5 (= |ULTIMATE.start_main_~B~0#1| 1)) (.cse7 (<= 5 ~counter~0))) (or (and .cse0 (< ~counter~0 4) .cse1 .cse2 .cse3 .cse4 .cse5) (and (= |ULTIMATE.start_main_~b~0#1| 8) .cse0 .cse2 .cse3 (<= 4 .cse6) .cse5 .cse7) (and .cse2 .cse8 .cse3 (< .cse6 .cse9) .cse5 (<= ~counter~0 2)) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse7) (and .cse0 (= |ULTIMATE.start_main_~b~0#1| 4) .cse1 .cse2 .cse3 (<= 4 ~counter~0) .cse10 .cse5) (let ((.cse11 (mod |ULTIMATE.start_main_~A~0#1| 4294967296))) (and (not (<= 2 .cse11)) .cse12 .cse13 .cse8 (<= 1 .cse11) .cse10 .cse5)) (let ((.cse15 (mod .cse16 4294967296)) (.cse14 (div |ULTIMATE.start_main_~b~0#1| 2))) (and (< .cse14 1073741824) (<= .cse9 .cse15) .cse12 .cse13 (<= 0 .cse14) .cse5 .cse7 (= (mod |ULTIMATE.start_main_~b~0#1| 2) 0) (<= (+ .cse15 1) (+ (* 4 .cse14) (* (div (+ (- .cse14) 1073741823) 1073741824) 4294967296)))))))) [2022-11-18 20:07:04,380 INFO L899 garLoopResultBuilder]: For program point L39-1(lines 38 47) no Hoare annotation was computed. [2022-11-18 20:07:04,380 INFO L899 garLoopResultBuilder]: For program point L35(line 35) no Hoare annotation was computed. [2022-11-18 20:07:04,380 INFO L899 garLoopResultBuilder]: For program point L19-2(lines 18 24) no Hoare annotation was computed. [2022-11-18 20:07:04,381 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 18 24) the Hoare annotation is: true [2022-11-18 20:07:04,381 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 18 24) no Hoare annotation was computed. [2022-11-18 20:07:04,381 INFO L899 garLoopResultBuilder]: For program point L20(lines 20 21) no Hoare annotation was computed. [2022-11-18 20:07:04,381 INFO L899 garLoopResultBuilder]: For program point L19(lines 19 22) no Hoare annotation was computed. [2022-11-18 20:07:04,381 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2022-11-18 20:07:04,384 INFO L444 BasicCegarLoop]: Path program histogram: [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:07:04,387 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-18 20:07:04,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 08:07:04 BoogieIcfgContainer [2022-11-18 20:07:04,410 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-18 20:07:04,411 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-18 20:07:04,411 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-18 20:07:04,412 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-18 20:07:04,412 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:53:29" (3/4) ... [2022-11-18 20:07:04,416 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-18 20:07:04,424 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-11-18 20:07:04,428 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2022-11-18 20:07:04,429 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-11-18 20:07:04,429 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-18 20:07:04,429 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-18 20:07:04,463 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/witness.graphml [2022-11-18 20:07:04,463 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-18 20:07:04,464 INFO L158 Benchmark]: Toolchain (without parser) took 816279.68ms. Allocated memory was 100.7MB in the beginning and 146.8MB in the end (delta: 46.1MB). Free memory was 68.9MB in the beginning and 62.1MB in the end (delta: 6.8MB). Peak memory consumption was 53.1MB. Max. memory is 16.1GB. [2022-11-18 20:07:04,464 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 100.7MB. Free memory was 56.0MB in the beginning and 55.9MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 20:07:04,465 INFO L158 Benchmark]: CACSL2BoogieTranslator took 401.50ms. Allocated memory is still 100.7MB. Free memory was 68.6MB in the beginning and 77.4MB in the end (delta: -8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-18 20:07:04,465 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.71ms. Allocated memory is still 100.7MB. Free memory was 77.4MB in the beginning and 75.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-18 20:07:04,466 INFO L158 Benchmark]: Boogie Preprocessor took 72.50ms. Allocated memory is still 100.7MB. Free memory was 75.9MB in the beginning and 74.8MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-18 20:07:04,466 INFO L158 Benchmark]: RCFGBuilder took 571.73ms. Allocated memory is still 100.7MB. Free memory was 74.8MB in the beginning and 64.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-18 20:07:04,467 INFO L158 Benchmark]: TraceAbstraction took 815111.79ms. Allocated memory was 100.7MB in the beginning and 146.8MB in the end (delta: 46.1MB). Free memory was 63.7MB in the beginning and 65.2MB in the end (delta: -1.5MB). Peak memory consumption was 75.7MB. Max. memory is 16.1GB. [2022-11-18 20:07:04,467 INFO L158 Benchmark]: Witness Printer took 52.34ms. Allocated memory is still 146.8MB. Free memory was 64.2MB in the beginning and 62.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-18 20:07:04,469 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 100.7MB. Free memory was 56.0MB in the beginning and 55.9MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 401.50ms. Allocated memory is still 100.7MB. Free memory was 68.6MB in the beginning and 77.4MB in the end (delta: -8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 51.71ms. Allocated memory is still 100.7MB. Free memory was 77.4MB in the beginning and 75.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 72.50ms. Allocated memory is still 100.7MB. Free memory was 75.9MB in the beginning and 74.8MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 571.73ms. Allocated memory is still 100.7MB. Free memory was 74.8MB in the beginning and 64.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 815111.79ms. Allocated memory was 100.7MB in the beginning and 146.8MB in the end (delta: 46.1MB). Free memory was 63.7MB in the beginning and 65.2MB in the end (delta: -1.5MB). Peak memory consumption was 75.7MB. Max. memory is 16.1GB. * Witness Printer took 52.34ms. Allocated memory is still 146.8MB. Free memory was 64.2MB in the beginning and 62.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * 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 - PositiveResult [Line: 21]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 815.0s, OverallIterations: 15, TraceHistogramMax: 6, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 194.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 17.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 33 mSolverCounterUnknown, 420 SdHoareTripleChecker+Valid, 143.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 407 mSDsluCounter, 1429 SdHoareTripleChecker+Invalid, 143.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 334 IncrementalHoareTripleChecker+Unchecked, 1072 mSDsCounter, 200 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1088 IncrementalHoareTripleChecker+Invalid, 1655 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 200 mSolverCounterUnsat, 357 mSDtfsCounter, 1088 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 575 GetRequests, 421 SyntacticMatches, 21 SemanticMatches, 133 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 131.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=122occurred in iteration=14, InterpolantAutomatonStates: 124, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 15 MinimizatonAttempts, 79 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 72 PreInvPairs, 111 NumberOfFragments, 624 HoareAnnotationTreeSize, 72 FomulaSimplifications, 454 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 6 FomulaSimplificationsInter, 2253 FormulaSimplificationTreeSizeReductionInter, 17.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 232.1s SatisfiabilityAnalysisTime, 365.9s InterpolantComputationTime, 357 NumberOfCodeBlocks, 351 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 547 ConstructedInterpolants, 0 QuantifiedInterpolants, 5585 SizeOfPredicates, 28 NumberOfNonLiveVariables, 1217 ConjunctsInSsa, 202 ConjunctsInUnsatCore, 23 InterpolantComputations, 7 PerfectInterpolantSequences, 337/454 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: (((((((((((!(b % 4294967296 <= r % 4294967296) && counter <= 1) && q == 0) && B == b) && A == r) && B == 1) || ((((((!(b % 4294967296 <= r % 4294967296) && 1 <= r % 4294967296) && q == 0) && A == r) && 2 == b) && B == 1) && counter <= 2)) || ((((((((b / 2 < 1073741824 && b % 4294967296 <= (b + r) % 4294967296) && q == 1) && b + r == A) && 4 <= counter) && 0 <= b / 2) && B == 1) && b % 2 == 0) && (b + r) % 4294967296 + 1 <= 4 * (b / 2) + (-(b / 2) + 1073741823) / 1073741824 * 4294967296)) || ((((((!(2 <= A % 4294967296) && counter < 4) && q == 1) && b + r == A) && B == b) && 1 <= A % 4294967296) && B == 1)) || ((((((b == 8 && !(b % 4294967296 <= r % 4294967296)) && q == 0) && A == r) && 4 <= r % 4294967296) && 4 <= counter) && B == 1)) || (((((((!(b % 4294967296 <= r % 4294967296) && b == 4) && counter < 4) && 1 <= r % 4294967296) && q == 0) && A == r) && B == 1) && 3 <= counter)) || ((((((!(b % 4294967296 <= r % 4294967296) && 1 <= r % 4294967296) && q == 0) && A == r) && 2 == b) && 4 <= counter) && B == 1)) || (5 <= counter && A % 4294967296 == (r + b * q) % 4294967296) - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((((q == 0 && A == r) && 5 <= counter) || ((((((2 <= counter && b == 4) && 1 <= r % 4294967296) && q == 0) && A == r) && B == 1) && counter <= 2)) || (((((b == 8 && q == 0) && A == r) && 4 <= r % 4294967296) && B == 1) && 3 <= counter)) || (((((0 <= counter && counter <= 0) && q == 0) && B == b) && A == r) && B == 1)) || ((((((counter <= 1 && 1 <= counter) && 1 <= r % 4294967296) && q == 0) && A == r) && 2 == b) && B == 1)) || (((((q == 0 && A == r) && 4 <= counter) && B == 1) && b % 2 == 0) && -b / -2 % 2 == 0) RESULT: Ultimate proved your program to be correct! [2022-11-18 20:07:04,709 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2022-11-18 20:07:04,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd88a11b-cfaa-41d8-ae56-cfe47e1e88eb/bin/uautomizer-TMbwUNV5ro/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 Writing output log to file Ultimate.log Result: TRUE