./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum_const5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum_const5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R --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 e6c0909fc593366247feb227b85c6733aa1dfc9c572e69f3a5aa951fa82d0326 --- 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-38b53e6 [2022-11-25 15:35:39,405 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:35:39,407 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:35:39,427 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:35:39,428 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:35:39,429 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:35:39,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:35:39,432 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:35:39,434 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:35:39,435 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:35:39,436 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:35:39,437 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:35:39,438 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:35:39,439 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:35:39,440 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:35:39,441 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:35:39,442 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:35:39,443 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:35:39,445 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:35:39,447 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:35:39,459 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:35:39,461 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:35:39,462 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:35:39,463 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:35:39,467 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:35:39,467 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:35:39,468 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:35:39,469 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:35:39,469 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:35:39,470 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:35:39,470 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:35:39,471 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:35:39,472 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:35:39,473 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:35:39,474 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:35:39,474 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:35:39,485 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:35:39,486 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:35:39,487 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:35:39,518 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:35:39,519 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:35:39,520 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 15:35:39,559 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:35:39,559 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:35:39,559 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:35:39,560 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:35:39,560 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:35:39,560 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:35:39,561 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:35:39,561 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:35:39,561 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:35:39,562 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:35:39,562 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 15:35:39,562 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:35:39,562 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 15:35:39,562 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:35:39,563 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 15:35:39,563 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:35:39,568 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 15:35:39,568 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 15:35:39,568 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 15:35:39,568 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:35:39,568 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 15:35:39,569 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:35:39,569 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:35:39,569 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:35:39,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:35:39,570 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:35:39,570 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:35:39,570 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 15:35:39,571 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 15:35:39,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 15:35:39,571 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:35:39,572 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 15:35:39,572 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:35:39,572 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:35:39,572 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e6c0909fc593366247feb227b85c6733aa1dfc9c572e69f3a5aa951fa82d0326 [2022-11-25 15:35:39,857 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:35:39,902 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:35:39,915 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:35:39,917 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:35:39,918 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:35:39,919 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/array-crafted/zero_sum_const5.c [2022-11-25 15:35:43,036 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:35:43,288 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:35:43,292 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/sv-benchmarks/c/array-crafted/zero_sum_const5.c [2022-11-25 15:35:43,305 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/data/45df63e8c/fb47c6795b7e4e14bc297ff684712694/FLAG35f199cf8 [2022-11-25 15:35:43,354 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/data/45df63e8c/fb47c6795b7e4e14bc297ff684712694 [2022-11-25 15:35:43,358 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:35:43,360 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:35:43,361 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:35:43,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:35:43,365 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:35:43,366 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:35:43" (1/1) ... [2022-11-25 15:35:43,368 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58dd6683 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:35:43, skipping insertion in model container [2022-11-25 15:35:43,368 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:35:43" (1/1) ... [2022-11-25 15:35:43,378 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:35:43,406 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:35:43,595 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/sv-benchmarks/c/array-crafted/zero_sum_const5.c[406,419] [2022-11-25 15:35:43,624 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:35:43,635 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 15:35:43,650 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/sv-benchmarks/c/array-crafted/zero_sum_const5.c[406,419] [2022-11-25 15:35:43,663 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:35:43,680 INFO L208 MainTranslator]: Completed translation [2022-11-25 15:35:43,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:35:43 WrapperNode [2022-11-25 15:35:43,681 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:35:43,682 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 15:35:43,682 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 15:35:43,683 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 15:35:43,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:35:43" (1/1) ... [2022-11-25 15:35:43,701 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:35:43" (1/1) ... [2022-11-25 15:35:43,728 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 148 [2022-11-25 15:35:43,728 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 15:35:43,729 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 15:35:43,729 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 15:35:43,729 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 15:35:43,740 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:35:43" (1/1) ... [2022-11-25 15:35:43,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:35:43" (1/1) ... [2022-11-25 15:35:43,763 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:35:43" (1/1) ... [2022-11-25 15:35:43,764 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:35:43" (1/1) ... [2022-11-25 15:35:43,771 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:35:43" (1/1) ... [2022-11-25 15:35:43,788 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:35:43" (1/1) ... [2022-11-25 15:35:43,790 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:35:43" (1/1) ... [2022-11-25 15:35:43,791 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:35:43" (1/1) ... [2022-11-25 15:35:43,794 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 15:35:43,795 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 15:35:43,795 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 15:35:43,795 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 15:35:43,796 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:35:43" (1/1) ... [2022-11-25 15:35:43,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:35:43,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:35:43,853 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 15:35:43,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 15:35:43,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 15:35:43,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 15:35:43,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 15:35:43,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 15:35:43,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 15:35:43,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 15:35:43,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 15:35:43,979 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 15:35:43,981 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 15:35:44,286 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 15:35:44,294 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 15:35:44,294 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-25 15:35:44,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:35:44 BoogieIcfgContainer [2022-11-25 15:35:44,297 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 15:35:44,300 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 15:35:44,307 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 15:35:44,333 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 15:35:44,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 03:35:43" (1/3) ... [2022-11-25 15:35:44,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@505a2b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:35:44, skipping insertion in model container [2022-11-25 15:35:44,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:35:43" (2/3) ... [2022-11-25 15:35:44,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@505a2b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:35:44, skipping insertion in model container [2022-11-25 15:35:44,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:35:44" (3/3) ... [2022-11-25 15:35:44,336 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum_const5.c [2022-11-25 15:35:44,381 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 15:35:44,381 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 15:35:44,467 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:35:44,477 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;@7b91d691, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:35:44,478 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 15:35:44,483 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 states have internal predecessors, (67), 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) [2022-11-25 15:35:44,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-25 15:35:44,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:35:44,493 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:35:44,493 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:35:44,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:35:44,504 INFO L85 PathProgramCache]: Analyzing trace with hash 226651140, now seen corresponding path program 1 times [2022-11-25 15:35:44,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:35:44,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184974569] [2022-11-25 15:35:44,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:44,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:35:44,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:44,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:35:44,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:35:44,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184974569] [2022-11-25 15:35:44,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184974569] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:35:44,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:35:44,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:35:44,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316895953] [2022-11-25 15:35:44,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:35:44,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 15:35:44,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:35:44,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 15:35:44,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 15:35:44,849 INFO L87 Difference]: Start difference. First operand has 44 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 states have internal predecessors, (67), 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) Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 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) [2022-11-25 15:35:44,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:35:44,891 INFO L93 Difference]: Finished difference Result 83 states and 126 transitions. [2022-11-25 15:35:44,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 15:35:44,895 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 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) Word has length 27 [2022-11-25 15:35:44,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:35:44,903 INFO L225 Difference]: With dead ends: 83 [2022-11-25 15:35:44,903 INFO L226 Difference]: Without dead ends: 39 [2022-11-25 15:35:44,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 15:35:44,913 INFO L413 NwaCegarLoop]: 55 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, 55 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 [2022-11-25 15:35:44,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 15:35:44,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-25 15:35:44,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-25 15:35:44,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 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) [2022-11-25 15:35:44,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2022-11-25 15:35:44,952 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 27 [2022-11-25 15:35:44,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:35:44,953 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2022-11-25 15:35:44,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 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) [2022-11-25 15:35:44,953 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2022-11-25 15:35:44,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-25 15:35:44,954 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:35:44,955 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:35:44,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 15:35:44,955 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:35:44,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:35:44,956 INFO L85 PathProgramCache]: Analyzing trace with hash -833651044, now seen corresponding path program 1 times [2022-11-25 15:35:44,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:35:44,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173354179] [2022-11-25 15:35:44,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:44,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:35:44,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:45,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:35:45,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:35:45,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173354179] [2022-11-25 15:35:45,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173354179] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:35:45,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:35:45,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:35:45,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803629964] [2022-11-25 15:35:45,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:35:45,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:35:45,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:35:45,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:35:45,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:35:45,105 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2022-11-25 15:35:45,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:35:45,223 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2022-11-25 15:35:45,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:35:45,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) Word has length 27 [2022-11-25 15:35:45,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:35:45,225 INFO L225 Difference]: With dead ends: 75 [2022-11-25 15:35:45,225 INFO L226 Difference]: Without dead ends: 41 [2022-11-25 15:35:45,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:35:45,228 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:35:45,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 50 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:35:45,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-25 15:35:45,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2022-11-25 15:35:45,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 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) [2022-11-25 15:35:45,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2022-11-25 15:35:45,237 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 27 [2022-11-25 15:35:45,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:35:45,237 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2022-11-25 15:35:45,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2022-11-25 15:35:45,238 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2022-11-25 15:35:45,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 15:35:45,239 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:35:45,239 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:35:45,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 15:35:45,240 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:35:45,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:35:45,241 INFO L85 PathProgramCache]: Analyzing trace with hash 479992254, now seen corresponding path program 1 times [2022-11-25 15:35:45,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:35:45,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755618322] [2022-11-25 15:35:45,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:45,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:35:45,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:45,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:35:45,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:35:45,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755618322] [2022-11-25 15:35:45,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755618322] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:35:45,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:35:45,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:35:45,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076870165] [2022-11-25 15:35:45,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:35:45,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:35:45,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:35:45,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:35:45,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:35:45,459 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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) [2022-11-25 15:35:45,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:35:45,624 INFO L93 Difference]: Finished difference Result 92 states and 120 transitions. [2022-11-25 15:35:45,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:35:45,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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) Word has length 29 [2022-11-25 15:35:45,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:35:45,626 INFO L225 Difference]: With dead ends: 92 [2022-11-25 15:35:45,626 INFO L226 Difference]: Without dead ends: 61 [2022-11-25 15:35:45,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:35:45,628 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 73 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:35:45,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 19 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:35:45,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-25 15:35:45,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2022-11-25 15:35:45,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 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) [2022-11-25 15:35:45,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2022-11-25 15:35:45,638 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 29 [2022-11-25 15:35:45,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:35:45,638 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2022-11-25 15:35:45,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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) [2022-11-25 15:35:45,639 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-11-25 15:35:45,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-25 15:35:45,644 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:35:45,645 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:35:45,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 15:35:45,645 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:35:45,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:35:45,646 INFO L85 PathProgramCache]: Analyzing trace with hash -509099182, now seen corresponding path program 1 times [2022-11-25 15:35:45,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:35:45,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235637872] [2022-11-25 15:35:45,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:45,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:35:45,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:45,841 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 15:35:45,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:35:45,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235637872] [2022-11-25 15:35:45,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235637872] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:35:45,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032852976] [2022-11-25 15:35:45,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:45,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:35:45,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:35:45,851 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:35:45,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 15:35:45,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:46,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 15:35:46,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:35:46,119 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 15:35:46,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:35:46,180 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 15:35:46,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032852976] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:35:46,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:35:46,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-25 15:35:46,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64041691] [2022-11-25 15:35:46,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:35:46,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 15:35:46,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:35:46,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 15:35:46,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:35:46,192 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2022-11-25 15:35:46,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:35:46,412 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2022-11-25 15:35:46,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:35:46,413 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) Word has length 49 [2022-11-25 15:35:46,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:35:46,414 INFO L225 Difference]: With dead ends: 97 [2022-11-25 15:35:46,414 INFO L226 Difference]: Without dead ends: 53 [2022-11-25 15:35:46,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:35:46,427 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 15:35:46,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 15:35:46,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-25 15:35:46,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-11-25 15:35:46,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 states have internal predecessors, (62), 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) [2022-11-25 15:35:46,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2022-11-25 15:35:46,440 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 49 [2022-11-25 15:35:46,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:35:46,441 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2022-11-25 15:35:46,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2022-11-25 15:35:46,441 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2022-11-25 15:35:46,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-25 15:35:46,442 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:35:46,443 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:35:46,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 15:35:46,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:35:46,653 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:35:46,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:35:46,653 INFO L85 PathProgramCache]: Analyzing trace with hash 290748660, now seen corresponding path program 2 times [2022-11-25 15:35:46,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:35:46,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676648228] [2022-11-25 15:35:46,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:46,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:35:46,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:46,864 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-25 15:35:46,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:35:46,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676648228] [2022-11-25 15:35:46,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676648228] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:35:46,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704406427] [2022-11-25 15:35:46,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:35:46,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:35:46,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:35:46,867 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:35:46,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 15:35:46,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:35:46,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:35:46,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 15:35:46,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:35:47,175 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-25 15:35:47,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:35:47,270 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-25 15:35:47,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704406427] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:35:47,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:35:47,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-25 15:35:47,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826025720] [2022-11-25 15:35:47,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:35:47,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 15:35:47,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:35:47,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 15:35:47,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-25 15:35:47,283 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 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) [2022-11-25 15:35:47,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:35:47,507 INFO L93 Difference]: Finished difference Result 123 states and 151 transitions. [2022-11-25 15:35:47,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 15:35:47,507 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 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) Word has length 51 [2022-11-25 15:35:47,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:35:47,512 INFO L225 Difference]: With dead ends: 123 [2022-11-25 15:35:47,513 INFO L226 Difference]: Without dead ends: 83 [2022-11-25 15:35:47,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2022-11-25 15:35:47,514 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 58 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 15:35:47,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 22 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 15:35:47,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-25 15:35:47,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2022-11-25 15:35:47,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 71 states have internal predecessors, (82), 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) [2022-11-25 15:35:47,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2022-11-25 15:35:47,536 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 51 [2022-11-25 15:35:47,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:35:47,537 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2022-11-25 15:35:47,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 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) [2022-11-25 15:35:47,537 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2022-11-25 15:35:47,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-25 15:35:47,539 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:35:47,539 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:35:47,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 15:35:47,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:35:47,740 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:35:47,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:35:47,740 INFO L85 PathProgramCache]: Analyzing trace with hash -813057144, now seen corresponding path program 3 times [2022-11-25 15:35:47,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:35:47,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036594813] [2022-11-25 15:35:47,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:47,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:35:47,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:54,950 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:35:54,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:35:54,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036594813] [2022-11-25 15:35:54,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036594813] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:35:54,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79996297] [2022-11-25 15:35:54,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:35:54,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:35:54,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:35:54,953 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:35:54,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 15:35:55,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 15:35:55,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:35:55,063 WARN L261 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 104 conjunts are in the unsatisfiable core [2022-11-25 15:35:55,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:35:57,551 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:35:57,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2022-11-25 15:35:57,799 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:35:57,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:36:09,171 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:36:09,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 76 [2022-11-25 15:36:09,655 INFO L321 Elim1Store]: treesize reduction 58, result has 13.4 percent of original size [2022-11-25 15:36:09,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 17 [2022-11-25 15:36:11,011 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:36:11,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79996297] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:36:11,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:36:11,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 29] total 62 [2022-11-25 15:36:11,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014786408] [2022-11-25 15:36:11,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:36:11,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-25 15:36:11,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:36:11,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-25 15:36:11,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=3406, Unknown=1, NotChecked=0, Total=3782 [2022-11-25 15:36:11,017 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 62 states, 62 states have (on average 3.306451612903226) internal successors, (205), 62 states have internal predecessors, (205), 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) [2022-11-25 15:36:23,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:36:23,542 INFO L93 Difference]: Finished difference Result 207 states and 237 transitions. [2022-11-25 15:36:23,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-25 15:36:23,543 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.306451612903226) internal successors, (205), 62 states have internal predecessors, (205), 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) Word has length 71 [2022-11-25 15:36:23,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:36:23,544 INFO L225 Difference]: With dead ends: 207 [2022-11-25 15:36:23,545 INFO L226 Difference]: Without dead ends: 201 [2022-11-25 15:36:23,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 100 SyntacticMatches, 36 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3086 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=987, Invalid=8324, Unknown=1, NotChecked=0, Total=9312 [2022-11-25 15:36:23,549 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 73 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 2443 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 2610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 2443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-25 15:36:23,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 138 Invalid, 2610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 2443 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-11-25 15:36:23,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-11-25 15:36:23,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 125. [2022-11-25 15:36:23,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.1612903225806452) internal successors, (144), 124 states have internal predecessors, (144), 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) [2022-11-25 15:36:23,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 144 transitions. [2022-11-25 15:36:23,591 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 144 transitions. Word has length 71 [2022-11-25 15:36:23,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:36:23,592 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 144 transitions. [2022-11-25 15:36:23,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.306451612903226) internal successors, (205), 62 states have internal predecessors, (205), 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) [2022-11-25 15:36:23,593 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 144 transitions. [2022-11-25 15:36:23,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-25 15:36:23,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:36:23,599 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:36:23,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 15:36:23,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:23,805 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:36:23,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:36:23,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1767165226, now seen corresponding path program 4 times [2022-11-25 15:36:23,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:36:23,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562530074] [2022-11-25 15:36:23,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:23,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:36:23,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:23,977 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 15:36:23,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:36:23,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562530074] [2022-11-25 15:36:23,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562530074] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:36:23,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630344247] [2022-11-25 15:36:23,979 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:36:23,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:23,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:36:23,981 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:36:24,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 15:36:24,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:36:24,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:36:24,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 15:36:24,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:36:24,253 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 15:36:24,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:36:24,374 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 15:36:24,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630344247] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:36:24,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:36:24,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-25 15:36:24,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952326446] [2022-11-25 15:36:24,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:36:24,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 15:36:24,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:36:24,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 15:36:24,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-11-25 15:36:24,377 INFO L87 Difference]: Start difference. First operand 125 states and 144 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 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) [2022-11-25 15:36:24,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:36:24,945 INFO L93 Difference]: Finished difference Result 289 states and 334 transitions. [2022-11-25 15:36:24,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 15:36:24,946 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 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) Word has length 73 [2022-11-25 15:36:24,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:36:24,947 INFO L225 Difference]: With dead ends: 289 [2022-11-25 15:36:24,947 INFO L226 Difference]: Without dead ends: 168 [2022-11-25 15:36:24,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 136 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-11-25 15:36:24,948 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 274 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 15:36:24,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 39 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 15:36:24,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-25 15:36:24,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 140. [2022-11-25 15:36:24,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.1366906474820144) internal successors, (158), 139 states have internal predecessors, (158), 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) [2022-11-25 15:36:24,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 158 transitions. [2022-11-25 15:36:24,981 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 158 transitions. Word has length 73 [2022-11-25 15:36:24,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:36:24,982 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 158 transitions. [2022-11-25 15:36:24,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 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) [2022-11-25 15:36:24,982 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 158 transitions. [2022-11-25 15:36:24,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-25 15:36:24,989 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:36:24,989 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:36:25,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 15:36:25,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 15:36:25,201 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:36:25,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:36:25,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1072452492, now seen corresponding path program 5 times [2022-11-25 15:36:25,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:36:25,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483990534] [2022-11-25 15:36:25,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:25,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:36:25,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:25,380 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-25 15:36:25,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:36:25,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483990534] [2022-11-25 15:36:25,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483990534] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:36:25,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892763557] [2022-11-25 15:36:25,381 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 15:36:25,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:25,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:36:25,383 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:36:25,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 15:36:25,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-25 15:36:25,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:36:25,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 15:36:25,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:36:25,744 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-25 15:36:25,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:36:25,889 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-25 15:36:25,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892763557] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:36:25,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:36:25,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-25 15:36:25,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324473694] [2022-11-25 15:36:25,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:36:25,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 15:36:25,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:36:25,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 15:36:25,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-11-25 15:36:25,892 INFO L87 Difference]: Start difference. First operand 140 states and 158 transitions. Second operand has 14 states, 14 states have (on average 7.5) internal successors, (105), 14 states have internal predecessors, (105), 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) [2022-11-25 15:36:26,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:36:26,392 INFO L93 Difference]: Finished difference Result 156 states and 174 transitions. [2022-11-25 15:36:26,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 15:36:26,392 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.5) internal successors, (105), 14 states have internal predecessors, (105), 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) Word has length 75 [2022-11-25 15:36:26,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:36:26,393 INFO L225 Difference]: With dead ends: 156 [2022-11-25 15:36:26,393 INFO L226 Difference]: Without dead ends: 104 [2022-11-25 15:36:26,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 141 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-11-25 15:36:26,395 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 181 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 15:36:26,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 24 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 15:36:26,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-25 15:36:26,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2022-11-25 15:36:26,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.118279569892473) internal successors, (104), 93 states have internal predecessors, (104), 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) [2022-11-25 15:36:26,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2022-11-25 15:36:26,410 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 75 [2022-11-25 15:36:26,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:36:26,414 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2022-11-25 15:36:26,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.5) internal successors, (105), 14 states have internal predecessors, (105), 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) [2022-11-25 15:36:26,415 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2022-11-25 15:36:26,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-25 15:36:26,417 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:36:26,417 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:36:26,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 15:36:26,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 15:36:26,625 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:36:26,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:36:26,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1413596990, now seen corresponding path program 6 times [2022-11-25 15:36:26,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:36:26,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217208489] [2022-11-25 15:36:26,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:26,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:36:26,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:43,278 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:36:43,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:36:43,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217208489] [2022-11-25 15:36:43,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217208489] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:36:43,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240567390] [2022-11-25 15:36:43,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 15:36:43,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:43,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:36:43,287 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:36:43,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 15:36:43,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-25 15:36:43,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:36:43,402 WARN L261 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 150 conjunts are in the unsatisfiable core [2022-11-25 15:36:43,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:36:43,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 15:36:43,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-25 15:36:55,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:36:55,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:36:55,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:36:55,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:36:55,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:36:55,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:36:55,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:36:55,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:36:55,632 INFO L321 Elim1Store]: treesize reduction 65, result has 43.0 percent of original size [2022-11-25 15:36:55,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 65 treesize of output 65 [2022-11-25 15:36:56,106 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:36:56,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:44:22,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 92 [2022-11-25 15:44:22,149 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:44:22,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 7969 treesize of output 6553 [2022-11-25 15:44:26,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 91 [2022-11-25 15:44:26,541 INFO L321 Elim1Store]: treesize reduction 48, result has 15.8 percent of original size [2022-11-25 15:44:26,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 6626 treesize of output 5162 [2022-11-25 15:45:46,875 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 1 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:45:46,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240567390] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:45:46,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:45:46,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 45, 60] total 157 [2022-11-25 15:45:46,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551722579] [2022-11-25 15:45:46,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:45:46,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 157 states [2022-11-25 15:45:46,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:45:46,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2022-11-25 15:45:46,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1649, Invalid=22730, Unknown=113, NotChecked=0, Total=24492 [2022-11-25 15:45:46,886 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand has 157 states, 157 states have (on average 1.7006369426751593) internal successors, (267), 157 states have internal predecessors, (267), 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) [2022-11-25 15:46:54,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:46:54,362 INFO L93 Difference]: Finished difference Result 496 states and 576 transitions. [2022-11-25 15:46:54,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-25 15:46:54,363 INFO L78 Accepts]: Start accepts. Automaton has has 157 states, 157 states have (on average 1.7006369426751593) internal successors, (267), 157 states have internal predecessors, (267), 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) Word has length 93 [2022-11-25 15:46:54,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:46:54,370 INFO L225 Difference]: With dead ends: 496 [2022-11-25 15:46:54,370 INFO L226 Difference]: Without dead ends: 414 [2022-11-25 15:46:54,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 75 SyntacticMatches, 35 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16647 ImplicationChecksByTransitivity, 491.6s TimeCoverageRelationStatistics Valid=4841, Invalid=36052, Unknown=113, NotChecked=0, Total=41006 [2022-11-25 15:46:54,382 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 1932 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 11837 mSolverCounterSat, 4413 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1932 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 16250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4413 IncrementalHoareTripleChecker+Valid, 11837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.2s IncrementalHoareTripleChecker+Time [2022-11-25 15:46:54,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1932 Valid, 381 Invalid, 16250 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4413 Valid, 11837 Invalid, 0 Unknown, 0 Unchecked, 32.2s Time] [2022-11-25 15:46:54,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-11-25 15:46:54,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 265. [2022-11-25 15:46:54,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.125) internal successors, (297), 264 states have internal predecessors, (297), 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) [2022-11-25 15:46:54,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 297 transitions. [2022-11-25 15:46:54,453 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 297 transitions. Word has length 93 [2022-11-25 15:46:54,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:46:54,453 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 297 transitions. [2022-11-25 15:46:54,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 157 states, 157 states have (on average 1.7006369426751593) internal successors, (267), 157 states have internal predecessors, (267), 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) [2022-11-25 15:46:54,454 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 297 transitions. [2022-11-25 15:46:54,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-25 15:46:54,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:46:54,456 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:46:54,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-25 15:46:54,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:46:54,657 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:46:54,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:46:54,658 INFO L85 PathProgramCache]: Analyzing trace with hash 197094432, now seen corresponding path program 7 times [2022-11-25 15:46:54,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:46:54,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143239801] [2022-11-25 15:46:54,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:46:54,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:46:54,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:46:54,927 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-25 15:46:54,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:46:54,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143239801] [2022-11-25 15:46:54,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143239801] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:46:54,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408645060] [2022-11-25 15:46:54,928 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 15:46:54,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:46:54,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:46:54,936 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:46:54,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 15:46:55,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:46:55,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 15:46:55,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:46:55,266 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-25 15:46:55,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:46:55,487 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-25 15:46:55,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408645060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:46:55,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:46:55,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-11-25 15:46:55,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627241142] [2022-11-25 15:46:55,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:46:55,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 15:46:55,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:46:55,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 15:46:55,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-25 15:46:55,489 INFO L87 Difference]: Start difference. First operand 265 states and 297 transitions. Second operand has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 states have internal predecessors, (73), 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) [2022-11-25 15:46:56,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:46:56,221 INFO L93 Difference]: Finished difference Result 445 states and 498 transitions. [2022-11-25 15:46:56,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 15:46:56,222 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 states have internal predecessors, (73), 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) Word has length 95 [2022-11-25 15:46:56,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:46:56,223 INFO L225 Difference]: With dead ends: 445 [2022-11-25 15:46:56,224 INFO L226 Difference]: Without dead ends: 127 [2022-11-25 15:46:56,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 176 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-11-25 15:46:56,227 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 201 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 15:46:56,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 48 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 15:46:56,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-25 15:46:56,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 116. [2022-11-25 15:46:56,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0956521739130434) internal successors, (126), 115 states have internal predecessors, (126), 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) [2022-11-25 15:46:56,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2022-11-25 15:46:56,262 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 95 [2022-11-25 15:46:56,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:46:56,262 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2022-11-25 15:46:56,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 states have internal predecessors, (73), 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) [2022-11-25 15:46:56,263 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2022-11-25 15:46:56,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-25 15:46:56,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:46:56,264 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:46:56,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 15:46:56,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:46:56,465 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:46:56,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:46:56,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1433123212, now seen corresponding path program 8 times [2022-11-25 15:46:56,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:46:56,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323282124] [2022-11-25 15:46:56,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:46:56,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:46:56,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:47:16,127 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 8 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:47:16,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:47:16,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323282124] [2022-11-25 15:47:16,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323282124] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:47:16,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123295395] [2022-11-25 15:47:16,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:47:16,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:47:16,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:47:16,136 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:47:16,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 15:47:16,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:47:16,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:47:16,273 WARN L261 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 180 conjunts are in the unsatisfiable core [2022-11-25 15:47:16,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:47:16,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 15:47:20,317 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:47:20,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:47:23,575 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 160 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 15:47:23,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123295395] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:47:23,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:47:23,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 23, 19] total 102 [2022-11-25 15:47:23,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692565100] [2022-11-25 15:47:23,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:47:23,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-11-25 15:47:23,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:47:23,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-11-25 15:47:23,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=9803, Unknown=0, NotChecked=0, Total=10302 [2022-11-25 15:47:23,580 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand has 102 states, 102 states have (on average 3.176470588235294) internal successors, (324), 102 states have internal predecessors, (324), 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) [2022-11-25 15:47:51,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:47:51,133 INFO L93 Difference]: Finished difference Result 346 states and 384 transitions. [2022-11-25 15:47:51,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-25 15:47:51,134 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 3.176470588235294) internal successors, (324), 102 states have internal predecessors, (324), 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) Word has length 115 [2022-11-25 15:47:51,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:47:51,137 INFO L225 Difference]: With dead ends: 346 [2022-11-25 15:47:51,138 INFO L226 Difference]: Without dead ends: 340 [2022-11-25 15:47:51,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 188 SyntacticMatches, 43 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9326 ImplicationChecksByTransitivity, 27.4s TimeCoverageRelationStatistics Valid=2325, Invalid=22167, Unknown=0, NotChecked=0, Total=24492 [2022-11-25 15:47:51,141 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 842 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 11625 mSolverCounterSat, 1664 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 13289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1664 IncrementalHoareTripleChecker+Valid, 11625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2022-11-25 15:47:51,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [842 Valid, 332 Invalid, 13289 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1664 Valid, 11625 Invalid, 0 Unknown, 0 Unchecked, 12.6s Time] [2022-11-25 15:47:51,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-11-25 15:47:51,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 121. [2022-11-25 15:47:51,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.1) internal successors, (132), 120 states have internal predecessors, (132), 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) [2022-11-25 15:47:51,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 132 transitions. [2022-11-25 15:47:51,190 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 132 transitions. Word has length 115 [2022-11-25 15:47:51,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:47:51,190 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 132 transitions. [2022-11-25 15:47:51,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 3.176470588235294) internal successors, (324), 102 states have internal predecessors, (324), 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) [2022-11-25 15:47:51,191 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 132 transitions. [2022-11-25 15:47:51,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-25 15:47:51,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:47:51,192 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:47:51,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 15:47:51,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 15:47:51,393 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:47:51,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:47:51,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1506332182, now seen corresponding path program 9 times [2022-11-25 15:47:51,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:47:51,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183967824] [2022-11-25 15:47:51,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:47:51,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:47:51,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:47:51,672 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-25 15:47:51,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:47:51,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183967824] [2022-11-25 15:47:51,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183967824] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:47:51,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413335010] [2022-11-25 15:47:51,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:47:51,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:47:51,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:47:51,674 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:47:51,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 15:47:51,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-25 15:47:51,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:47:51,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 15:47:51,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:47:51,962 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-25 15:47:51,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:47:52,058 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-25 15:47:52,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413335010] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:47:52,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:47:52,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-11-25 15:47:52,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002587871] [2022-11-25 15:47:52,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:47:52,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 15:47:52,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:47:52,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 15:47:52,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-11-25 15:47:52,061 INFO L87 Difference]: Start difference. First operand 121 states and 132 transitions. Second operand has 20 states, 20 states have (on average 6.1) internal successors, (122), 20 states have internal predecessors, (122), 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) [2022-11-25 15:47:52,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:47:52,929 INFO L93 Difference]: Finished difference Result 363 states and 402 transitions. [2022-11-25 15:47:52,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 15:47:52,930 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.1) internal successors, (122), 20 states have internal predecessors, (122), 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) Word has length 117 [2022-11-25 15:47:52,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:47:52,931 INFO L225 Difference]: With dead ends: 363 [2022-11-25 15:47:52,931 INFO L226 Difference]: Without dead ends: 153 [2022-11-25 15:47:52,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 222 SyntacticMatches, 10 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2022-11-25 15:47:52,933 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 331 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 15:47:52,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 49 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 15:47:52,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-11-25 15:47:52,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 136. [2022-11-25 15:47:52,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0814814814814815) internal successors, (146), 135 states have internal predecessors, (146), 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) [2022-11-25 15:47:52,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 146 transitions. [2022-11-25 15:47:52,982 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 146 transitions. Word has length 117 [2022-11-25 15:47:52,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:47:52,982 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 146 transitions. [2022-11-25 15:47:52,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.1) internal successors, (122), 20 states have internal predecessors, (122), 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) [2022-11-25 15:47:52,983 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 146 transitions. [2022-11-25 15:47:52,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-25 15:47:52,984 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:47:52,984 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:47:52,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 15:47:53,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:47:53,191 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:47:53,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:47:53,192 INFO L85 PathProgramCache]: Analyzing trace with hash 631817864, now seen corresponding path program 10 times [2022-11-25 15:47:53,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:47:53,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444048414] [2022-11-25 15:47:53,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:47:53,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:47:53,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:47:53,519 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-11-25 15:47:53,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:47:53,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444048414] [2022-11-25 15:47:53,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444048414] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:47:53,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989448094] [2022-11-25 15:47:53,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:47:53,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:47:53,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:47:53,521 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:47:53,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 15:47:53,673 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:47:53,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:47:53,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 15:47:53,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:47:54,032 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-11-25 15:47:54,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:47:54,377 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-11-25 15:47:54,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989448094] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:47:54,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:47:54,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-11-25 15:47:54,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174767797] [2022-11-25 15:47:54,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:47:54,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 15:47:54,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:47:54,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 15:47:54,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-11-25 15:47:54,379 INFO L87 Difference]: Start difference. First operand 136 states and 146 transitions. Second operand has 20 states, 20 states have (on average 4.5) internal successors, (90), 20 states have internal predecessors, (90), 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) [2022-11-25 15:47:55,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:47:55,348 INFO L93 Difference]: Finished difference Result 152 states and 162 transitions. [2022-11-25 15:47:55,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 15:47:55,349 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.5) internal successors, (90), 20 states have internal predecessors, (90), 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) Word has length 135 [2022-11-25 15:47:55,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:47:55,350 INFO L225 Difference]: With dead ends: 152 [2022-11-25 15:47:55,350 INFO L226 Difference]: Without dead ends: 148 [2022-11-25 15:47:55,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 255 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2022-11-25 15:47:55,351 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 292 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 15:47:55,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 29 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 15:47:55,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-25 15:47:55,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 138. [2022-11-25 15:47:55,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0802919708029197) internal successors, (148), 137 states have internal predecessors, (148), 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) [2022-11-25 15:47:55,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 148 transitions. [2022-11-25 15:47:55,417 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 148 transitions. Word has length 135 [2022-11-25 15:47:55,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:47:55,417 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 148 transitions. [2022-11-25 15:47:55,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.5) internal successors, (90), 20 states have internal predecessors, (90), 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) [2022-11-25 15:47:55,418 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 148 transitions. [2022-11-25 15:47:55,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-25 15:47:55,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:47:55,419 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:47:55,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 15:47:55,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 15:47:55,626 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:47:55,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:47:55,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1639815466, now seen corresponding path program 11 times [2022-11-25 15:47:55,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:47:55,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272316824] [2022-11-25 15:47:55,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:47:55,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:47:55,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:48:31,565 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 10 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:48:31,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:48:31,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272316824] [2022-11-25 15:48:31,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272316824] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:48:31,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280872972] [2022-11-25 15:48:31,566 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 15:48:31,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:48:31,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:48:31,580 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:48:31,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 15:48:31,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-25 15:48:31,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:48:31,837 WARN L261 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 228 conjunts are in the unsatisfiable core [2022-11-25 15:48:31,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:48:31,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 15:48:32,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 15:48:32,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 15:48:32,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 15:48:39,573 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:48:39,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:48:44,969 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 250 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-25 15:48:44,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280872972] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:48:44,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:48:44,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 28, 23] total 128 [2022-11-25 15:48:44,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449247178] [2022-11-25 15:48:44,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:48:44,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-11-25 15:48:44,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:48:44,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-11-25 15:48:44,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=608, Invalid=15648, Unknown=0, NotChecked=0, Total=16256 [2022-11-25 15:48:44,975 INFO L87 Difference]: Start difference. First operand 138 states and 148 transitions. Second operand has 128 states, 128 states have (on average 3.03125) internal successors, (388), 128 states have internal predecessors, (388), 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) [2022-11-25 15:49:29,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:49:29,203 INFO L93 Difference]: Finished difference Result 424 states and 471 transitions. [2022-11-25 15:49:29,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-25 15:49:29,204 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 3.03125) internal successors, (388), 128 states have internal predecessors, (388), 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) Word has length 137 [2022-11-25 15:49:29,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:49:29,206 INFO L225 Difference]: With dead ends: 424 [2022-11-25 15:49:29,206 INFO L226 Difference]: Without dead ends: 418 [2022-11-25 15:49:29,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 219 SyntacticMatches, 52 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13056 ImplicationChecksByTransitivity, 48.1s TimeCoverageRelationStatistics Valid=3093, Invalid=34737, Unknown=0, NotChecked=0, Total=37830 [2022-11-25 15:49:29,209 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 2349 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 16410 mSolverCounterSat, 4215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2349 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 20625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4215 IncrementalHoareTripleChecker+Valid, 16410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.5s IncrementalHoareTripleChecker+Time [2022-11-25 15:49:29,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2349 Valid, 339 Invalid, 20625 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4215 Valid, 16410 Invalid, 0 Unknown, 0 Unchecked, 19.5s Time] [2022-11-25 15:49:29,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-11-25 15:49:29,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 143. [2022-11-25 15:49:29,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.0845070422535212) internal successors, (154), 142 states have internal predecessors, (154), 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) [2022-11-25 15:49:29,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 154 transitions. [2022-11-25 15:49:29,286 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 154 transitions. Word has length 137 [2022-11-25 15:49:29,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:49:29,287 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 154 transitions. [2022-11-25 15:49:29,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 3.03125) internal successors, (388), 128 states have internal predecessors, (388), 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) [2022-11-25 15:49:29,288 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 154 transitions. [2022-11-25 15:49:29,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-25 15:49:29,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:49:29,289 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:49:29,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:29,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 15:49:29,496 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:49:29,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:29,496 INFO L85 PathProgramCache]: Analyzing trace with hash -337097908, now seen corresponding path program 12 times [2022-11-25 15:49:29,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:49:29,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486506867] [2022-11-25 15:49:29,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:29,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:49:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:29,744 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-11-25 15:49:29,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:49:29,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486506867] [2022-11-25 15:49:29,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486506867] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:49:29,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128413251] [2022-11-25 15:49:29,745 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 15:49:29,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:49:29,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:29,748 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:49:29,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 15:49:29,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-25 15:49:29,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:49:29,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 15:49:29,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:30,169 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-11-25 15:49:30,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:49:30,420 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-11-25 15:49:30,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128413251] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:49:30,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:49:30,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-11-25 15:49:30,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491001349] [2022-11-25 15:49:30,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:49:30,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 15:49:30,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:49:30,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 15:49:30,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-11-25 15:49:30,424 INFO L87 Difference]: Start difference. First operand 143 states and 154 transitions. Second operand has 23 states, 23 states have (on average 4.434782608695652) internal successors, (102), 23 states have internal predecessors, (102), 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) [2022-11-25 15:49:31,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:49:31,567 INFO L93 Difference]: Finished difference Result 423 states and 462 transitions. [2022-11-25 15:49:31,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 15:49:31,568 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.434782608695652) internal successors, (102), 23 states have internal predecessors, (102), 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) Word has length 139 [2022-11-25 15:49:31,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:49:31,569 INFO L225 Difference]: With dead ends: 423 [2022-11-25 15:49:31,569 INFO L226 Difference]: Without dead ends: 175 [2022-11-25 15:49:31,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 264 SyntacticMatches, 12 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2022-11-25 15:49:31,571 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 359 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 15:49:31,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 50 Invalid, 1300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 15:49:31,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-25 15:49:31,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 158. [2022-11-25 15:49:31,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.070063694267516) internal successors, (168), 157 states have internal predecessors, (168), 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) [2022-11-25 15:49:31,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 168 transitions. [2022-11-25 15:49:31,661 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 168 transitions. Word has length 139 [2022-11-25 15:49:31,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:49:31,662 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 168 transitions. [2022-11-25 15:49:31,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.434782608695652) internal successors, (102), 23 states have internal predecessors, (102), 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) [2022-11-25 15:49:31,662 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 168 transitions. [2022-11-25 15:49:31,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-25 15:49:31,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:49:31,664 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:49:31,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-25 15:49:31,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 15:49:31,871 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:49:31,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:31,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1612014142, now seen corresponding path program 13 times [2022-11-25 15:49:31,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:49:31,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467753669] [2022-11-25 15:49:31,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:31,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:49:31,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:32,240 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-11-25 15:49:32,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:49:32,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467753669] [2022-11-25 15:49:32,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467753669] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:49:32,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121149963] [2022-11-25 15:49:32,241 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 15:49:32,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:49:32,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:32,242 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:49:32,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 15:49:32,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:32,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 15:49:32,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:32,786 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-11-25 15:49:32,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:49:33,170 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-11-25 15:49:33,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121149963] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:49:33,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:49:33,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-11-25 15:49:33,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787290574] [2022-11-25 15:49:33,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:49:33,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 15:49:33,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:49:33,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 15:49:33,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-11-25 15:49:33,173 INFO L87 Difference]: Start difference. First operand 158 states and 168 transitions. Second operand has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 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) [2022-11-25 15:49:34,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:49:34,193 INFO L93 Difference]: Finished difference Result 174 states and 184 transitions. [2022-11-25 15:49:34,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 15:49:34,194 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 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) Word has length 157 [2022-11-25 15:49:34,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:49:34,196 INFO L225 Difference]: With dead ends: 174 [2022-11-25 15:49:34,196 INFO L226 Difference]: Without dead ends: 170 [2022-11-25 15:49:34,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 294 SyntacticMatches, 12 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=275, Invalid=915, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 15:49:34,198 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 300 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 15:49:34,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 32 Invalid, 1126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 15:49:34,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-25 15:49:34,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 160. [2022-11-25 15:49:34,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.069182389937107) internal successors, (170), 159 states have internal predecessors, (170), 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) [2022-11-25 15:49:34,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 170 transitions. [2022-11-25 15:49:34,312 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 170 transitions. Word has length 157 [2022-11-25 15:49:34,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:49:34,313 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 170 transitions. [2022-11-25 15:49:34,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 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) [2022-11-25 15:49:34,313 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 170 transitions. [2022-11-25 15:49:34,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-25 15:49:34,314 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:49:34,314 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:49:34,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:34,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e119364-ad91-430e-93d7-202eeec60c41/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 15:49:34,522 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:49:34,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:34,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1284366496, now seen corresponding path program 14 times [2022-11-25 15:49:34,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:49:34,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672879788] [2022-11-25 15:49:34,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:34,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:49:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat