./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/phases_1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-acceleration/phases_1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN --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 4f868671c12bae02e06798527bc7c1ed7b8332d3fee83b3ff24f9cd503da0a60 --- 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-6b4ec56 [2022-11-20 10:30:17,807 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:30:17,809 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:30:17,831 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:30:17,831 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:30:17,833 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:30:17,834 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:30:17,836 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:30:17,838 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:30:17,839 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:30:17,840 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:30:17,844 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:30:17,846 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:30:17,847 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:30:17,852 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:30:17,853 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:30:17,855 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:30:17,858 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:30:17,860 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:30:17,864 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:30:17,869 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:30:17,870 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:30:17,872 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:30:17,873 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:30:17,876 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:30:17,876 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:30:17,877 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:30:17,878 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:30:17,879 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:30:17,880 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:30:17,880 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:30:17,890 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:30:17,891 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:30:17,892 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:30:17,893 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:30:17,893 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:30:17,894 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:30:17,894 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:30:17,895 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:30:17,896 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:30:17,896 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:30:17,900 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 10:30:17,944 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:30:17,944 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:30:17,944 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:30:17,945 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:30:17,945 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:30:17,946 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:30:17,946 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:30:17,947 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:30:17,947 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:30:17,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:30:17,948 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:30:17,948 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:30:17,948 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:30:17,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:30:17,949 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:30:17,949 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:30:17,949 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:30:17,949 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:30:17,950 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:30:17,950 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:30:17,950 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:30:17,951 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:30:17,951 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:30:17,951 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:30:17,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:30:17,952 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:30:17,952 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:30:17,952 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:30:17,953 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:30:17,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:30:17,953 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:30:17,953 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:30:17,953 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:30:17,954 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f868671c12bae02e06798527bc7c1ed7b8332d3fee83b3ff24f9cd503da0a60 [2022-11-20 10:30:18,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:30:18,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:30:18,234 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:30:18,235 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:30:18,236 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:30:18,237 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/loop-acceleration/phases_1-2.c [2022-11-20 10:30:21,200 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:30:21,401 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:30:21,402 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/sv-benchmarks/c/loop-acceleration/phases_1-2.c [2022-11-20 10:30:21,408 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/data/05c85cea5/574a0926256d43c4ad92f09a9fa76065/FLAGad60e0cde [2022-11-20 10:30:21,423 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/data/05c85cea5/574a0926256d43c4ad92f09a9fa76065 [2022-11-20 10:30:21,425 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:30:21,427 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:30:21,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:30:21,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:30:21,432 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:30:21,433 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:30:21" (1/1) ... [2022-11-20 10:30:21,434 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54d6b12f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:21, skipping insertion in model container [2022-11-20 10:30:21,435 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:30:21" (1/1) ... [2022-11-20 10:30:21,442 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:30:21,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:30:21,646 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_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/sv-benchmarks/c/loop-acceleration/phases_1-2.c[322,335] [2022-11-20 10:30:21,657 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:30:21,667 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:30:21,679 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_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/sv-benchmarks/c/loop-acceleration/phases_1-2.c[322,335] [2022-11-20 10:30:21,681 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:30:21,694 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:30:21,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:21 WrapperNode [2022-11-20 10:30:21,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:30:21,695 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:30:21,696 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:30:21,696 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:30:21,703 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:21" (1/1) ... [2022-11-20 10:30:21,710 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:21" (1/1) ... [2022-11-20 10:30:21,726 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 27 [2022-11-20 10:30:21,727 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:30:21,727 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:30:21,728 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:30:21,728 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:30:21,737 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:21" (1/1) ... [2022-11-20 10:30:21,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:21" (1/1) ... [2022-11-20 10:30:21,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:21" (1/1) ... [2022-11-20 10:30:21,739 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:21" (1/1) ... [2022-11-20 10:30:21,748 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:21" (1/1) ... [2022-11-20 10:30:21,752 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:21" (1/1) ... [2022-11-20 10:30:21,754 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:21" (1/1) ... [2022-11-20 10:30:21,754 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:21" (1/1) ... [2022-11-20 10:30:21,758 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:30:21,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:30:21,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:30:21,761 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:30:21,762 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:21" (1/1) ... [2022-11-20 10:30:21,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:30:21,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:21,800 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:30:21,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:30:21,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:30:21,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:30:21,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:30:21,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:30:21,896 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:30:21,897 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:30:21,987 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:30:21,993 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:30:21,993 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 10:30:21,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:30:21 BoogieIcfgContainer [2022-11-20 10:30:21,995 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:30:21,997 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:30:21,998 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:30:22,001 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:30:22,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:30:21" (1/3) ... [2022-11-20 10:30:22,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1382dc06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:30:22, skipping insertion in model container [2022-11-20 10:30:22,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:21" (2/3) ... [2022-11-20 10:30:22,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1382dc06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:30:22, skipping insertion in model container [2022-11-20 10:30:22,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:30:21" (3/3) ... [2022-11-20 10:30:22,004 INFO L112 eAbstractionObserver]: Analyzing ICFG phases_1-2.c [2022-11-20 10:30:22,024 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:30:22,025 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 10:30:22,109 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:30:22,120 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;@68d0410d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:30:22,120 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 10:30:22,140 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 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) [2022-11-20 10:30:22,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 10:30:22,146 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:30:22,159 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 10:30:22,160 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:30:22,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:22,165 INFO L85 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2022-11-20 10:30:22,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:22,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502435262] [2022-11-20 10:30:22,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:22,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:22,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:22,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:22,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:22,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502435262] [2022-11-20 10:30:22,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502435262] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:30:22,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:30:22,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:30:22,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799374456] [2022-11-20 10:30:22,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:30:22,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 10:30:22,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:22,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 10:30:22,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 10:30:22,432 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 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 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2022-11-20 10:30:22,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:30:22,448 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2022-11-20 10:30:22,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 10:30:22,452 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2022-11-20 10:30:22,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:30:22,465 INFO L225 Difference]: With dead ends: 20 [2022-11-20 10:30:22,465 INFO L226 Difference]: Without dead ends: 8 [2022-11-20 10:30:22,467 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 [2022-11-20 10:30:22,473 INFO L413 NwaCegarLoop]: 13 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, 13 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 [2022-11-20 10:30:22,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:30:22,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-11-20 10:30:22,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-11-20 10:30:22,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 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) [2022-11-20 10:30:22,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2022-11-20 10:30:22,510 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2022-11-20 10:30:22,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:30:22,511 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2022-11-20 10:30:22,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2022-11-20 10:30:22,512 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2022-11-20 10:30:22,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 10:30:22,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:30:22,513 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 10:30:22,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:30:22,514 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:30:22,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:22,515 INFO L85 PathProgramCache]: Analyzing trace with hash 889639793, now seen corresponding path program 1 times [2022-11-20 10:30:22,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:22,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585271445] [2022-11-20 10:30:22,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:22,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:22,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:22,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:22,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:22,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585271445] [2022-11-20 10:30:22,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585271445] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:30:22,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:30:22,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:30:22,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111198762] [2022-11-20 10:30:22,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:30:22,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:30:22,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:22,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:30:22,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:30:22,746 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-11-20 10:30:22,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:30:22,774 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2022-11-20 10:30:22,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:30:22,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2022-11-20 10:30:22,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:30:22,776 INFO L225 Difference]: With dead ends: 16 [2022-11-20 10:30:22,776 INFO L226 Difference]: Without dead ends: 10 [2022-11-20 10:30:22,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:30:22,787 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:30:22,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 10 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:30:22,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-20 10:30:22,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-20 10:30:22,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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) [2022-11-20 10:30:22,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-11-20 10:30:22,792 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2022-11-20 10:30:22,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:30:22,792 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-11-20 10:30:22,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-11-20 10:30:22,793 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-11-20 10:30:22,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 10:30:22,793 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:30:22,794 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:22,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 10:30:22,794 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:30:22,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:22,795 INFO L85 PathProgramCache]: Analyzing trace with hash 295691924, now seen corresponding path program 1 times [2022-11-20 10:30:22,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:22,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840181837] [2022-11-20 10:30:22,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:22,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:22,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:22,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:22,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:22,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840181837] [2022-11-20 10:30:22,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840181837] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:22,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718734358] [2022-11-20 10:30:22,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:22,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:22,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:22,929 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:22,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:30:23,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:23,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 10:30:23,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:23,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:23,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:30:23,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:23,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718734358] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:30:23,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:30:23,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-20 10:30:23,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359196694] [2022-11-20 10:30:23,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:30:23,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:30:23,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:23,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:30:23,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:30:23,177 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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) [2022-11-20 10:30:23,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:30:23,256 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2022-11-20 10:30:23,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:30:23,258 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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 8 [2022-11-20 10:30:23,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:30:23,259 INFO L225 Difference]: With dead ends: 20 [2022-11-20 10:30:23,260 INFO L226 Difference]: Without dead ends: 14 [2022-11-20 10:30:23,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:30:23,262 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:30:23,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 21 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:30:23,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-20 10:30:23,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2022-11-20 10:30:23,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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) [2022-11-20 10:30:23,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-11-20 10:30:23,273 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2022-11-20 10:30:23,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:30:23,274 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-11-20 10:30:23,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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) [2022-11-20 10:30:23,275 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-11-20 10:30:23,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:30:23,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:30:23,275 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:23,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:30:23,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:23,486 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:30:23,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:23,486 INFO L85 PathProgramCache]: Analyzing trace with hash 572634524, now seen corresponding path program 1 times [2022-11-20 10:30:23,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:23,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164334528] [2022-11-20 10:30:23,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:23,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:23,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:23,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:23,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:23,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164334528] [2022-11-20 10:30:23,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164334528] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:23,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786789150] [2022-11-20 10:30:23,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:23,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:23,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:23,690 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:23,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:30:23,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:23,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:30:23,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:23,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:23,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:30:23,939 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:23,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786789150] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:30:23,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:30:23,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2022-11-20 10:30:23,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210600325] [2022-11-20 10:30:23,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:30:23,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 10:30:23,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:23,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 10:30:23,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:30:23,942 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 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) [2022-11-20 10:30:24,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:30:24,314 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2022-11-20 10:30:24,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:30:24,315 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 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 12 [2022-11-20 10:30:24,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:30:24,316 INFO L225 Difference]: With dead ends: 26 [2022-11-20 10:30:24,317 INFO L226 Difference]: Without dead ends: 19 [2022-11-20 10:30:24,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:30:24,318 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 6 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:30:24,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 30 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:30:24,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-20 10:30:24,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-20 10:30:24,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 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) [2022-11-20 10:30:24,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-11-20 10:30:24,325 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 12 [2022-11-20 10:30:24,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:30:24,326 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-11-20 10:30:24,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 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) [2022-11-20 10:30:24,326 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-11-20 10:30:24,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 10:30:24,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:30:24,327 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:24,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:30:24,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:24,533 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:30:24,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:24,535 INFO L85 PathProgramCache]: Analyzing trace with hash -549258615, now seen corresponding path program 2 times [2022-11-20 10:30:24,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:24,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261994494] [2022-11-20 10:30:24,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:24,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:24,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:24,730 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:30:24,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:24,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261994494] [2022-11-20 10:30:24,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261994494] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:24,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655042639] [2022-11-20 10:30:24,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:30:24,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:24,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:24,732 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:24,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:30:24,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:30:24,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:30:24,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 10:30:24,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:24,999 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:24,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:30:25,205 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:25,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655042639] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:30:25,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:30:25,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 17 [2022-11-20 10:30:25,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114004163] [2022-11-20 10:30:25,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:30:25,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 10:30:25,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:25,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 10:30:25,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:30:25,208 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 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) [2022-11-20 10:30:25,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:30:25,944 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2022-11-20 10:30:25,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:30:25,945 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 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 18 [2022-11-20 10:30:25,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:30:25,946 INFO L225 Difference]: With dead ends: 36 [2022-11-20 10:30:25,946 INFO L226 Difference]: Without dead ends: 25 [2022-11-20 10:30:25,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2022-11-20 10:30:25,948 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:30:25,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 30 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:30:25,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-20 10:30:25,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-20 10:30:25,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 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) [2022-11-20 10:30:25,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2022-11-20 10:30:25,954 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 18 [2022-11-20 10:30:25,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:30:25,955 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2022-11-20 10:30:25,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 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) [2022-11-20 10:30:25,955 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2022-11-20 10:30:25,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 10:30:25,956 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:30:25,956 INFO L195 NwaCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:25,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:30:26,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:26,168 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:30:26,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:26,169 INFO L85 PathProgramCache]: Analyzing trace with hash 379103926, now seen corresponding path program 3 times [2022-11-20 10:30:26,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:26,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78640955] [2022-11-20 10:30:26,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:26,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:26,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:26,326 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 10:30:26,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:26,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78640955] [2022-11-20 10:30:26,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78640955] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:26,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891369437] [2022-11-20 10:30:26,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:30:26,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:26,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:26,328 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:26,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:30:26,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-20 10:30:26,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:30:26,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:30:26,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:26,573 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:30:26,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:30:26,988 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:30:26,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891369437] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:30:26,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:30:26,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 11] total 20 [2022-11-20 10:30:26,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887273273] [2022-11-20 10:30:26,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:30:26,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 10:30:26,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:26,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 10:30:26,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2022-11-20 10:30:26,991 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 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) [2022-11-20 10:30:30,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:30:30,085 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2022-11-20 10:30:30,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 10:30:30,086 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 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 24 [2022-11-20 10:30:30,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:30:30,087 INFO L225 Difference]: With dead ends: 58 [2022-11-20 10:30:30,087 INFO L226 Difference]: Without dead ends: 43 [2022-11-20 10:30:30,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=284, Invalid=472, Unknown=0, NotChecked=0, Total=756 [2022-11-20 10:30:30,088 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 37 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:30:30,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 23 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:30:30,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-20 10:30:30,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-20 10:30:30,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 42 states have internal predecessors, (48), 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) [2022-11-20 10:30:30,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-11-20 10:30:30,100 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 24 [2022-11-20 10:30:30,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:30:30,100 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-11-20 10:30:30,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 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) [2022-11-20 10:30:30,101 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-11-20 10:30:30,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-20 10:30:30,102 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:30:30,102 INFO L195 NwaCegarLoop]: trace histogram [18, 13, 5, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:30,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-20 10:30:30,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:30,307 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:30:30,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:30,308 INFO L85 PathProgramCache]: Analyzing trace with hash 286774065, now seen corresponding path program 4 times [2022-11-20 10:30:30,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:30,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316833085] [2022-11-20 10:30:30,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:30,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:30,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:30,808 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 126 proven. 182 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 10:30:30,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:30,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316833085] [2022-11-20 10:30:30,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316833085] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:30,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860132838] [2022-11-20 10:30:30,809 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:30:30,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:30,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:30,815 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:30,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 10:30:30,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:30:30,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:30:30,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 10:30:30,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:31,135 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 51 proven. 272 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:30:31,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:30:32,454 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 51 proven. 272 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:30:32,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860132838] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:30:32,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:30:32,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 20] total 38 [2022-11-20 10:30:32,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138899078] [2022-11-20 10:30:32,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:30:32,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-20 10:30:32,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:32,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-20 10:30:32,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=994, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 10:30:32,458 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 38 states have internal predecessors, (80), 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) [2022-11-20 10:31:09,877 WARN L233 SmtUtils]: Spent 6.25s on a formula simplification. DAG size of input: 122 DAG size of output: 17 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:31:09,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:31:09,887 INFO L93 Difference]: Finished difference Result 94 states and 122 transitions. [2022-11-20 10:31:09,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-20 10:31:09,888 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 38 states have internal predecessors, (80), 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 42 [2022-11-20 10:31:09,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:31:09,890 INFO L225 Difference]: With dead ends: 94 [2022-11-20 10:31:09,890 INFO L226 Difference]: Without dead ends: 79 [2022-11-20 10:31:09,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 38.0s TimeCoverageRelationStatistics Valid=1058, Invalid=1912, Unknown=0, NotChecked=0, Total=2970 [2022-11-20 10:31:09,892 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 82 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:31:09,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 36 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 10:31:09,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-20 10:31:09,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-11-20 10:31:09,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0769230769230769) internal successors, (84), 78 states have internal predecessors, (84), 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) [2022-11-20 10:31:09,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2022-11-20 10:31:09,909 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 42 [2022-11-20 10:31:09,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:31:09,910 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2022-11-20 10:31:09,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 38 states have internal predecessors, (80), 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) [2022-11-20 10:31:09,910 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2022-11-20 10:31:09,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-20 10:31:09,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:31:09,912 INFO L195 NwaCegarLoop]: trace histogram [36, 31, 5, 1, 1, 1, 1, 1, 1] [2022-11-20 10:31:09,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-20 10:31:10,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:31:10,118 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:31:10,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:31:10,118 INFO L85 PathProgramCache]: Analyzing trace with hash 195541479, now seen corresponding path program 5 times [2022-11-20 10:31:10,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:31:10,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266383046] [2022-11-20 10:31:10,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:10,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:31:10,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:11,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 288 proven. 992 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 10:31:11,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:11,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266383046] [2022-11-20 10:31:11,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266383046] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:31:11,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601688330] [2022-11-20 10:31:11,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:31:11,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:31:11,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:31:11,683 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:31:11,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 10:31:19,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2022-11-20 10:31:19,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:31:19,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-20 10:31:19,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:31:19,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:19,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:31:23,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:23,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601688330] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:31:23,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:31:23,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 39, 39] total 77 [2022-11-20 10:31:23,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278004894] [2022-11-20 10:31:23,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:31:23,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-11-20 10:31:23,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:23,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-11-20 10:31:23,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1589, Invalid=4263, Unknown=0, NotChecked=0, Total=5852 [2022-11-20 10:31:23,086 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand has 77 states, 77 states have (on average 2.051948051948052) internal successors, (158), 77 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) [2022-11-20 10:32:00,885 WARN L233 SmtUtils]: Spent 15.17s on a formula simplification. DAG size of input: 150 DAG size of output: 10 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:32:32,180 WARN L233 SmtUtils]: Spent 9.26s on a formula simplification. DAG size of input: 142 DAG size of output: 10 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:33:10,906 WARN L233 SmtUtils]: Spent 5.97s on a formula simplification. DAG size of input: 134 DAG size of output: 10 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:33:44,164 WARN L233 SmtUtils]: Spent 6.77s on a formula simplification. DAG size of input: 126 DAG size of output: 10 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:37:56,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:37:56,668 INFO L93 Difference]: Finished difference Result 128 states and 171 transitions. [2022-11-20 10:37:56,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-20 10:37:56,669 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.051948051948052) internal successors, (158), 77 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) Word has length 78 [2022-11-20 10:37:56,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:37:56,671 INFO L225 Difference]: With dead ends: 128 [2022-11-20 10:37:56,671 INFO L226 Difference]: Without dead ends: 113 [2022-11-20 10:37:56,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 112 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 392.5s TimeCoverageRelationStatistics Valid=2924, Invalid=6365, Unknown=23, NotChecked=0, Total=9312 [2022-11-20 10:37:56,674 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 53 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 2597 mSolverCounterSat, 819 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 3416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 819 IncrementalHoareTripleChecker+Valid, 2597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:37:56,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 117 Invalid, 3416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [819 Valid, 2597 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-11-20 10:37:56,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-20 10:37:56,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-11-20 10:37:56,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.1964285714285714) internal successors, (134), 112 states have internal predecessors, (134), 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) [2022-11-20 10:37:56,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 134 transitions. [2022-11-20 10:37:56,694 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 134 transitions. Word has length 78 [2022-11-20 10:37:56,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:37:56,694 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 134 transitions. [2022-11-20 10:37:56,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.051948051948052) internal successors, (158), 77 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) [2022-11-20 10:37:56,695 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 134 transitions. [2022-11-20 10:37:56,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-20 10:37:56,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:37:56,697 INFO L195 NwaCegarLoop]: trace histogram [53, 32, 21, 1, 1, 1, 1, 1, 1] [2022-11-20 10:37:56,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 10:37:56,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 10:37:56,904 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:37:56,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:37:56,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1658186330, now seen corresponding path program 6 times [2022-11-20 10:37:56,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:37:56,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450426326] [2022-11-20 10:37:56,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:37:56,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:37:56,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:37:58,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1353 proven. 1056 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-11-20 10:37:58,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:37:58,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450426326] [2022-11-20 10:37:58,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450426326] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:37:58,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57407661] [2022-11-20 10:37:58,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:37:58,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:37:58,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:37:58,431 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:37:58,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_795d352a-6a2c-4ef2-a50c-b1936d1e3be3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 10:38:29,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 53 check-sat command(s) [2022-11-20 10:38:29,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:29,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-20 10:38:29,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:30,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-11-20 10:38:30,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:34,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-11-20 10:38:34,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57407661] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:34,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:38:34,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 38, 39] total 76 [2022-11-20 10:38:34,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236861952] [2022-11-20 10:38:34,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:34,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-20 10:38:34,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:34,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-20 10:38:34,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1552, Invalid=4148, Unknown=0, NotChecked=0, Total=5700 [2022-11-20 10:38:34,948 INFO L87 Difference]: Start difference. First operand 113 states and 134 transitions. Second operand has 76 states, 76 states have (on average 2.0526315789473686) internal successors, (156), 76 states have internal predecessors, (156), 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) [2022-11-20 10:38:38,120 WARN L837 $PredicateComparison]: unable to prove that (and (let ((.cse0 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 29) 4294967296))) (or (not (< .cse0 268435455)) (< .cse0 65521))) (let ((.cse1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 28) 4294967296))) (or (< .cse1 65521) (not (< .cse1 268435455)))) (let ((.cse2 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 27) 4294967296))) (or (< .cse2 65521) (not (< .cse2 268435455)))) (let ((.cse3 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 38) 4294967296))) (or (not (< .cse3 268435455)) (< .cse3 65521))) (let ((.cse4 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 12) 4294967296))) (or (< .cse4 65521) (not (< .cse4 268435455)))) (let ((.cse5 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 9) 4294967296))) (or (< .cse5 65521) (not (< .cse5 268435455)))) (let ((.cse6 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 25) 4294967296))) (or (< .cse6 65521) (not (< .cse6 268435455)))) (let ((.cse7 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 30) 4294967296))) (or (< .cse7 65521) (not (< .cse7 268435455)))) (let ((.cse8 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 22) 4294967296))) (or (< .cse8 65521) (not (< .cse8 268435455)))) (let ((.cse9 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 31) 4294967296))) (or (< .cse9 65521) (not (< .cse9 268435455)))) (let ((.cse10 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 17) 4294967296))) (or (not (< .cse10 268435455)) (< .cse10 65521))) (let ((.cse11 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 16) 4294967296))) (or (< .cse11 65521) (not (< .cse11 268435455)))) (let ((.cse12 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 11) 4294967296))) (or (< .cse12 65521) (not (< .cse12 268435455)))) (let ((.cse13 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 20) 4294967296))) (or (< .cse13 65521) (not (< .cse13 268435455)))) (let ((.cse14 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 14) 4294967296))) (or (< .cse14 65521) (not (< .cse14 268435455)))) (let ((.cse15 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 34) 4294967296))) (or (not (< .cse15 268435455)) (< .cse15 65521))) (let ((.cse16 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 13) 4294967296))) (or (< .cse16 65521) (not (< .cse16 268435455)))) (let ((.cse17 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 6) 4294967296))) (or (< .cse17 65521) (not (< .cse17 268435455)))) (let ((.cse18 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 2) 4294967296))) (or (< .cse18 65521) (not (< .cse18 268435455)))) (let ((.cse19 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 35) 4294967296))) (or (< .cse19 65521) (not (< .cse19 268435455)))) (let ((.cse20 (mod (+ 7 |c_ULTIMATE.start_main_~x~0#1|) 4294967296))) (or (< .cse20 65521) (not (< .cse20 268435455)))) (let ((.cse21 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 10) 4294967296))) (or (not (< .cse21 268435455)) (< .cse21 65521))) (let ((.cse22 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 18) 4294967296))) (or (< .cse22 65521) (not (< .cse22 268435455)))) (let ((.cse23 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4) 4294967296))) (or (< .cse23 65521) (not (< .cse23 268435455)))) (< (mod |c_ULTIMATE.start_main_~x~0#1| 4294967296) 65521) (let ((.cse24 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 36) 4294967296))) (or (< .cse24 65521) (not (< .cse24 268435455)))) (let ((.cse25 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 15) 4294967296))) (or (< .cse25 65521) (not (< .cse25 268435455)))) (let ((.cse26 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 21) 4294967296))) (or (not (< .cse26 268435455)) (< .cse26 65521))) (let ((.cse27 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 32) 4294967296))) (or (not (< .cse27 268435455)) (< .cse27 65521))) (let ((.cse28 (mod (+ 23 |c_ULTIMATE.start_main_~x~0#1|) 4294967296))) (or (< .cse28 65521) (not (< .cse28 268435455)))) (let ((.cse29 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 8) 4294967296))) (or (< .cse29 65521) (not (< .cse29 268435455)))) (let ((.cse30 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 26) 4294967296))) (or (< .cse30 65521) (not (< .cse30 268435455)))) (let ((.cse31 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 37) 4294967296))) (or (not (< .cse31 268435455)) (< .cse31 65521))) (let ((.cse32 (mod (+ 19 |c_ULTIMATE.start_main_~x~0#1|) 4294967296))) (or (< .cse32 65521) (not (< .cse32 268435455)))) (let ((.cse33 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 33) 4294967296))) (or (not (< .cse33 268435455)) (< .cse33 65521))) (let ((.cse34 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 24) 4294967296))) (or (< .cse34 65521) (not (< .cse34 268435455))))) is different from false [2022-11-20 10:38:40,139 WARN L837 $PredicateComparison]: unable to prove that (and (let ((.cse0 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 29) 4294967296))) (or (not (< .cse0 268435455)) (< .cse0 65521))) (let ((.cse1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 28) 4294967296))) (or (< .cse1 65521) (not (< .cse1 268435455)))) (let ((.cse2 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 27) 4294967296))) (or (< .cse2 65521) (not (< .cse2 268435455)))) (let ((.cse3 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 12) 4294967296))) (or (< .cse3 65521) (not (< .cse3 268435455)))) (let ((.cse4 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 9) 4294967296))) (or (< .cse4 65521) (not (< .cse4 268435455)))) (let ((.cse5 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 25) 4294967296))) (or (< .cse5 65521) (not (< .cse5 268435455)))) (let ((.cse6 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 30) 4294967296))) (or (< .cse6 65521) (not (< .cse6 268435455)))) (let ((.cse7 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 22) 4294967296))) (or (< .cse7 65521) (not (< .cse7 268435455)))) (let ((.cse8 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 31) 4294967296))) (or (< .cse8 65521) (not (< .cse8 268435455)))) (let ((.cse9 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 17) 4294967296))) (or (not (< .cse9 268435455)) (< .cse9 65521))) (let ((.cse10 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 16) 4294967296))) (or (< .cse10 65521) (not (< .cse10 268435455)))) (let ((.cse11 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 11) 4294967296))) (or (< .cse11 65521) (not (< .cse11 268435455)))) (let ((.cse12 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 20) 4294967296))) (or (< .cse12 65521) (not (< .cse12 268435455)))) (let ((.cse13 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 14) 4294967296))) (or (< .cse13 65521) (not (< .cse13 268435455)))) (let ((.cse14 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 34) 4294967296))) (or (not (< .cse14 268435455)) (< .cse14 65521))) (let ((.cse15 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 13) 4294967296))) (or (< .cse15 65521) (not (< .cse15 268435455)))) (let ((.cse16 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 6) 4294967296))) (or (< .cse16 65521) (not (< .cse16 268435455)))) (let ((.cse17 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 35) 4294967296))) (or (< .cse17 65521) (not (< .cse17 268435455)))) (let ((.cse18 (mod (+ 7 |c_ULTIMATE.start_main_~x~0#1|) 4294967296))) (or (< .cse18 65521) (not (< .cse18 268435455)))) (let ((.cse19 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 10) 4294967296))) (or (not (< .cse19 268435455)) (< .cse19 65521))) (let ((.cse20 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 18) 4294967296))) (or (< .cse20 65521) (not (< .cse20 268435455)))) (let ((.cse21 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 36) 4294967296))) (or (< .cse21 65521) (not (< .cse21 268435455)))) (let ((.cse22 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 15) 4294967296))) (or (< .cse22 65521) (not (< .cse22 268435455)))) (let ((.cse23 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 21) 4294967296))) (or (not (< .cse23 268435455)) (< .cse23 65521))) (let ((.cse24 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 32) 4294967296))) (or (not (< .cse24 268435455)) (< .cse24 65521))) (let ((.cse25 (mod (+ 23 |c_ULTIMATE.start_main_~x~0#1|) 4294967296))) (or (< .cse25 65521) (not (< .cse25 268435455)))) (let ((.cse26 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 8) 4294967296))) (or (< .cse26 65521) (not (< .cse26 268435455)))) (let ((.cse27 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 26) 4294967296))) (or (< .cse27 65521) (not (< .cse27 268435455)))) (let ((.cse28 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 37) 4294967296))) (or (not (< .cse28 268435455)) (< .cse28 65521))) (let ((.cse29 (mod (+ 19 |c_ULTIMATE.start_main_~x~0#1|) 4294967296))) (or (< .cse29 65521) (not (< .cse29 268435455)))) (let ((.cse30 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 33) 4294967296))) (or (not (< .cse30 268435455)) (< .cse30 65521))) (let ((.cse31 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 24) 4294967296))) (or (< .cse31 65521) (not (< .cse31 268435455))))) is different from false [2022-11-20 10:40:17,495 WARN L233 SmtUtils]: Spent 1.04m on a formula simplification. DAG size of input: 222 DAG size of output: 19 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:42:06,381 WARN L233 SmtUtils]: Spent 1.27m on a formula simplification. DAG size of input: 250 DAG size of output: 19 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:44:09,010 WARN L233 SmtUtils]: Spent 1.12m on a formula simplification. DAG size of input: 243 DAG size of output: 19 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:45:13,979 WARN L233 SmtUtils]: Spent 14.10s on a formula simplification. DAG size of input: 231 DAG size of output: 10 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)