./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6d5fb336862157190b75f459fa5ac35efb8ca70e207f909b082fde37cf98e7f7 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:37:54,715 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:37:54,717 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:37:54,736 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:37:54,737 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:37:54,738 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:37:54,740 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:37:54,741 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:37:54,743 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:37:54,744 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:37:54,745 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:37:54,746 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:37:54,746 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:37:54,748 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:37:54,749 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:37:54,750 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:37:54,751 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:37:54,752 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:37:54,757 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:37:54,760 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:37:54,762 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:37:54,765 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:37:54,766 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:37:54,767 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:37:54,770 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:37:54,771 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:37:54,771 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:37:54,772 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:37:54,773 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:37:54,774 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:37:54,774 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:37:54,775 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:37:54,776 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:37:54,777 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:37:54,778 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:37:54,778 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:37:54,787 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:37:54,787 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:37:54,788 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:37:54,789 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:37:54,790 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:37:54,790 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:37:54,838 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:37:54,839 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:37:54,839 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:37:54,839 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:37:54,840 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:37:54,840 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:37:54,841 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:37:54,841 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:37:54,841 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:37:54,841 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:37:54,842 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:37:54,843 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:37:54,843 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:37:54,843 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:37:54,843 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:37:54,843 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:37:54,844 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:37:54,844 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:37:54,844 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:37:54,844 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:37:54,844 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:37:54,844 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:37:54,845 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:37:54,845 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:37:54,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:37:54,845 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:37:54,847 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:37:54,847 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:37:54,847 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:37:54,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:37:54,847 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:37:54,847 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:37:54,848 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:37:54,848 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_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d5fb336862157190b75f459fa5ac35efb8ca70e207f909b082fde37cf98e7f7 [2022-11-18 20:37:55,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:37:55,143 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:37:55,146 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:37:55,147 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:37:55,148 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:37:55,149 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound10.c [2022-11-18 20:37:55,219 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/data/2e8cd3c82/ebc954f90e19404dab1fe7fcf27ea66d/FLAG21106e77e [2022-11-18 20:37:55,790 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:37:55,791 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound10.c [2022-11-18 20:37:55,797 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/data/2e8cd3c82/ebc954f90e19404dab1fe7fcf27ea66d/FLAG21106e77e [2022-11-18 20:37:56,143 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/data/2e8cd3c82/ebc954f90e19404dab1fe7fcf27ea66d [2022-11-18 20:37:56,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:37:56,150 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:37:56,152 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:37:56,152 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:37:56,156 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:37:56,158 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:37:56" (1/1) ... [2022-11-18 20:37:56,160 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ffb3784 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:37:56, skipping insertion in model container [2022-11-18 20:37:56,160 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:37:56" (1/1) ... [2022-11-18 20:37:56,168 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:37:56,186 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:37:56,415 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound10.c[538,551] [2022-11-18 20:37:56,446 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:37:56,461 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:37:56,478 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound10.c[538,551] [2022-11-18 20:37:56,503 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:37:56,522 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:37:56,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:37:56 WrapperNode [2022-11-18 20:37:56,523 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:37:56,524 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:37:56,525 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:37:56,525 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:37:56,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:37:56" (1/1) ... [2022-11-18 20:37:56,540 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:37:56" (1/1) ... [2022-11-18 20:37:56,566 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2022-11-18 20:37:56,566 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:37:56,567 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:37:56,567 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:37:56,567 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:37:56,578 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:37:56" (1/1) ... [2022-11-18 20:37:56,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:37:56" (1/1) ... [2022-11-18 20:37:56,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:37:56" (1/1) ... [2022-11-18 20:37:56,589 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:37:56" (1/1) ... [2022-11-18 20:37:56,596 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:37:56" (1/1) ... [2022-11-18 20:37:56,606 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:37:56" (1/1) ... [2022-11-18 20:37:56,607 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:37:56" (1/1) ... [2022-11-18 20:37:56,609 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:37:56" (1/1) ... [2022-11-18 20:37:56,611 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:37:56,616 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:37:56,616 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:37:56,616 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:37:56,617 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:37:56" (1/1) ... [2022-11-18 20:37:56,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:37:56,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:37:56,649 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:37:56,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:37:56,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:37:56,701 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-18 20:37:56,701 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-18 20:37:56,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:37:56,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:37:56,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:37:56,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-18 20:37:56,702 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-18 20:37:56,768 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:37:56,770 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:37:56,982 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:37:56,988 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:37:56,988 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 20:37:56,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:37:56 BoogieIcfgContainer [2022-11-18 20:37:56,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:37:56,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:37:56,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:37:56,995 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:37:56,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:37:56" (1/3) ... [2022-11-18 20:37:56,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f371c28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:37:56, skipping insertion in model container [2022-11-18 20:37:56,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:37:56" (2/3) ... [2022-11-18 20:37:56,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f371c28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:37:56, skipping insertion in model container [2022-11-18 20:37:56,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:37:56" (3/3) ... [2022-11-18 20:37:56,999 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound10.c [2022-11-18 20:37:57,018 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:37:57,018 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:37:57,125 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:37:57,133 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;@649aa3ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:37:57,134 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 20:37:57,138 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-18 20:37:57,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-18 20:37:57,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:37:57,148 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:37:57,149 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:37:57,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:37:57,155 INFO L85 PathProgramCache]: Analyzing trace with hash -487550744, now seen corresponding path program 1 times [2022-11-18 20:37:57,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:37:57,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404222264] [2022-11-18 20:37:57,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:37:57,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:37:57,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:37:57,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:37:57,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:37:57,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:37:57,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:37:57,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-18 20:37:57,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:37:57,433 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:37:57,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:37:57,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404222264] [2022-11-18 20:37:57,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404222264] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:37:57,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:37:57,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:37:57,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856839088] [2022-11-18 20:37:57,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:37:57,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:37:57,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:37:57,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:37:57,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:37:57,511 INFO L87 Difference]: Start difference. First operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-18 20:37:57,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:37:57,559 INFO L93 Difference]: Finished difference Result 63 states and 104 transitions. [2022-11-18 20:37:57,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:37:57,563 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-11-18 20:37:57,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:37:57,577 INFO L225 Difference]: With dead ends: 63 [2022-11-18 20:37:57,578 INFO L226 Difference]: Without dead ends: 29 [2022-11-18 20:37:57,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:37:57,588 INFO L413 NwaCegarLoop]: 43 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, 43 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:37:57,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:37:57,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-18 20:37:57,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-18 20:37:57,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-18 20:37:57,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2022-11-18 20:37:57,647 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 24 [2022-11-18 20:37:57,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:37:57,648 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2022-11-18 20:37:57,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-18 20:37:57,649 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2022-11-18 20:37:57,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-18 20:37:57,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:37:57,656 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:37:57,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:37:57,658 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:37:57,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:37:57,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1636258074, now seen corresponding path program 1 times [2022-11-18 20:37:57,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:37:57,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183983470] [2022-11-18 20:37:57,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:37:57,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:37:57,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:37:57,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:37:57,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:37:57,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:37:57,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:37:57,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-18 20:37:57,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:37:57,954 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:37:57,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:37:57,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183983470] [2022-11-18 20:37:57,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183983470] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:37:57,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:37:57,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:37:57,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179121727] [2022-11-18 20:37:57,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:37:57,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:37:57,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:37:57,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:37:57,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:37:57,966 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 20:37:58,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:37:58,057 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2022-11-18 20:37:58,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:37:58,059 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-11-18 20:37:58,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:37:58,060 INFO L225 Difference]: With dead ends: 42 [2022-11-18 20:37:58,060 INFO L226 Difference]: Without dead ends: 40 [2022-11-18 20:37:58,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:37:58,062 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:37:58,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 128 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:37:58,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-18 20:37:58,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2022-11-18 20:37:58,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-18 20:37:58,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2022-11-18 20:37:58,086 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 24 [2022-11-18 20:37:58,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:37:58,094 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2022-11-18 20:37:58,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 20:37:58,095 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2022-11-18 20:37:58,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-18 20:37:58,096 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:37:58,097 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:37:58,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:37:58,097 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:37:58,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:37:58,098 INFO L85 PathProgramCache]: Analyzing trace with hash 906849917, now seen corresponding path program 1 times [2022-11-18 20:37:58,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:37:58,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604198147] [2022-11-18 20:37:58,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:37:58,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:37:58,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:37:58,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:37:58,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:37:58,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:37:58,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:37:58,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-18 20:37:58,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:37:58,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-18 20:37:58,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:37:58,329 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:37:58,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:37:58,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604198147] [2022-11-18 20:37:58,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604198147] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:37:58,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:37:58,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:37:58,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985827524] [2022-11-18 20:37:58,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:37:58,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:37:58,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:37:58,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:37:58,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:37:58,333 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 20:37:58,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:37:58,405 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2022-11-18 20:37:58,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:37:58,406 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-11-18 20:37:58,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:37:58,407 INFO L225 Difference]: With dead ends: 46 [2022-11-18 20:37:58,407 INFO L226 Difference]: Without dead ends: 44 [2022-11-18 20:37:58,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:37:58,409 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:37:58,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 123 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:37:58,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-18 20:37:58,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-11-18 20:37:58,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-18 20:37:58,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-11-18 20:37:58,421 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 29 [2022-11-18 20:37:58,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:37:58,422 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-11-18 20:37:58,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 20:37:58,422 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-11-18 20:37:58,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-18 20:37:58,428 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:37:58,428 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:37:58,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 20:37:58,429 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:37:58,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:37:58,430 INFO L85 PathProgramCache]: Analyzing trace with hash 710995206, now seen corresponding path program 1 times [2022-11-18 20:37:58,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:37:58,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001857378] [2022-11-18 20:37:58,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:37:58,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:37:58,466 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:37:58,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1804498838] [2022-11-18 20:37:58,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:37:58,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:37:58,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:37:58,473 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:37:58,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:37:58,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:37:58,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 20:37:58,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:37:58,812 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-18 20:37:58,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:37:59,007 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-18 20:37:59,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:37:59,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001857378] [2022-11-18 20:37:59,008 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:37:59,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804498838] [2022-11-18 20:37:59,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804498838] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:37:59,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:37:59,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2022-11-18 20:37:59,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772835621] [2022-11-18 20:37:59,013 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:37:59,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:37:59,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:37:59,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:37:59,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:37:59,018 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-18 20:37:59,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:37:59,290 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2022-11-18 20:37:59,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:37:59,291 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 34 [2022-11-18 20:37:59,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:37:59,294 INFO L225 Difference]: With dead ends: 72 [2022-11-18 20:37:59,294 INFO L226 Difference]: Without dead ends: 57 [2022-11-18 20:37:59,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:37:59,296 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 24 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:37:59,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 137 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:37:59,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-18 20:37:59,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2022-11-18 20:37:59,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-18 20:37:59,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2022-11-18 20:37:59,314 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 34 [2022-11-18 20:37:59,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:37:59,314 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2022-11-18 20:37:59,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-18 20:37:59,315 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2022-11-18 20:37:59,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-18 20:37:59,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:37:59,316 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:37:59,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:37:59,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-18 20:37:59,517 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:37:59,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:37:59,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1829555286, now seen corresponding path program 1 times [2022-11-18 20:37:59,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:37:59,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520745934] [2022-11-18 20:37:59,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:37:59,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:37:59,530 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:37:59,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1193444767] [2022-11-18 20:37:59,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:37:59,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:37:59,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:37:59,532 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:37:59,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:37:59,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:37:59,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 20:37:59,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:37:59,850 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:37:59,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:38:00,085 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-18 20:38:00,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:00,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520745934] [2022-11-18 20:38:00,086 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:38:00,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193444767] [2022-11-18 20:38:00,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193444767] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:38:00,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:38:00,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2022-11-18 20:38:00,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729618887] [2022-11-18 20:38:00,087 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:38:00,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 20:38:00,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:00,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 20:38:00,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:38:00,089 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 13 states have internal predecessors, (30), 7 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-18 20:38:00,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:00,452 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2022-11-18 20:38:00,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:38:00,453 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 13 states have internal predecessors, (30), 7 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 41 [2022-11-18 20:38:00,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:00,454 INFO L225 Difference]: With dead ends: 69 [2022-11-18 20:38:00,454 INFO L226 Difference]: Without dead ends: 62 [2022-11-18 20:38:00,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-11-18 20:38:00,455 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 54 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:00,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 100 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:38:00,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-18 20:38:00,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-11-18 20:38:00,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.105263157894737) internal successors, (42), 41 states have internal predecessors, (42), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-18 20:38:00,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2022-11-18 20:38:00,482 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 41 [2022-11-18 20:38:00,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:00,483 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2022-11-18 20:38:00,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 13 states have internal predecessors, (30), 7 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-18 20:38:00,483 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2022-11-18 20:38:00,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-18 20:38:00,484 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:00,484 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:00,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:38:00,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:38:00,685 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:38:00,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:00,686 INFO L85 PathProgramCache]: Analyzing trace with hash -677073599, now seen corresponding path program 1 times [2022-11-18 20:38:00,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:00,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151368035] [2022-11-18 20:38:00,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:00,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:00,697 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:38:00,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1267188281] [2022-11-18 20:38:00,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:00,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:38:00,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:38:00,698 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:38:00,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:38:00,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:00,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 20:38:00,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:38:00,812 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-18 20:38:00,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:38:00,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:00,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151368035] [2022-11-18 20:38:00,813 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:38:00,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267188281] [2022-11-18 20:38:00,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267188281] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:38:00,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:38:00,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:38:00,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501299873] [2022-11-18 20:38:00,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:38:00,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:38:00,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:00,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:38:00,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:38:00,815 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-18 20:38:00,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:00,863 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2022-11-18 20:38:00,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:38:00,863 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 69 [2022-11-18 20:38:00,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:00,865 INFO L225 Difference]: With dead ends: 70 [2022-11-18 20:38:00,865 INFO L226 Difference]: Without dead ends: 63 [2022-11-18 20:38:00,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:38:00,866 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:00,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 67 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:38:00,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-18 20:38:00,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-11-18 20:38:00,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 41 states have internal predecessors, (43), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-18 20:38:00,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2022-11-18 20:38:00,882 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 69 [2022-11-18 20:38:00,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:00,883 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2022-11-18 20:38:00,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-18 20:38:00,883 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2022-11-18 20:38:00,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-18 20:38:00,884 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:00,884 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:00,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-18 20:38:01,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:38:01,089 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:38:01,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:01,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1754894755, now seen corresponding path program 1 times [2022-11-18 20:38:01,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:01,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671734013] [2022-11-18 20:38:01,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:01,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:01,102 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:38:01,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [934948219] [2022-11-18 20:38:01,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:01,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:38:01,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:38:01,104 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:38:01,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:38:01,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:01,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-18 20:38:01,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:38:02,177 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 42 proven. 8 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-18 20:38:02,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:39:12,775 WARN L233 SmtUtils]: Spent 40.36s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:40:07,330 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse11 (mod |c_ULTIMATE.start_main_~B~0#1| 4294967296))) (or (let ((.cse7 (= (mod |c_ULTIMATE.start_main_~d~0#1| 2) 0)) (.cse12 (div |c_ULTIMATE.start_main_~d~0#1| 2)) (.cse13 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296))) (let ((.cse2 (+ .cse12 .cse13)) (.cse5 (not .cse7)) (.cse6 (+ .cse12 .cse13 1)) (.cse8 (* .cse11 |c_ULTIMATE.start_main_~q~0#1|)) (.cse9 (* (div |c_ULTIMATE.start_main_~p~0#1| 2) .cse11)) (.cse1 (< |c_ULTIMATE.start_main_~p~0#1| 0)) (.cse0 (= (mod |c_ULTIMATE.start_main_~p~0#1| 2) 0))) (and (or (and (not .cse0) .cse1) (let ((.cse3 (+ .cse8 |c_ULTIMATE.start_main_~r~0#1| .cse9)) (.cse4 (< |c_ULTIMATE.start_main_~d~0#1| 0))) (and (or (= .cse2 .cse3) (and .cse4 .cse5)) (or (= .cse3 .cse6) .cse7 (not .cse4))))) (or (let ((.cse10 (+ .cse8 .cse11 |c_ULTIMATE.start_main_~r~0#1| .cse9))) (and (or (= .cse2 .cse10) .cse5) (or (= .cse10 .cse6) .cse7))) (not .cse1) .cse0)))) (<= |c_ULTIMATE.start_main_~d~0#1| |c_ULTIMATE.start_main_~r~0#1|) (not (= |c_ULTIMATE.start_main_~d~0#1| (* |c_ULTIMATE.start_main_~p~0#1| .cse11))))) is different from true [2022-11-18 20:41:11,198 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 3 refuted. 0 times theorem prover too weak. 103 trivial. 5 not checked. [2022-11-18 20:41:11,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:41:11,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671734013] [2022-11-18 20:41:11,198 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:41:11,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934948219] [2022-11-18 20:41:11,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934948219] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:41:11,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:41:11,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2022-11-18 20:41:11,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850611440] [2022-11-18 20:41:11,200 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:41:11,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-18 20:41:11,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:41:11,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-18 20:41:11,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=379, Unknown=8, NotChecked=40, Total=506 [2022-11-18 20:41:11,202 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 19 states have internal predecessors, (40), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 10 states have call predecessors, (20), 7 states have call successors, (20) [2022-11-18 20:41:15,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:41:17,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:41:21,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:41:23,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:41:31,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:41:35,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:41:42,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:41:44,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:41:44,605 INFO L93 Difference]: Finished difference Result 118 states and 145 transitions. [2022-11-18 20:41:44,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 20:41:44,606 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 19 states have internal predecessors, (40), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 10 states have call predecessors, (20), 7 states have call successors, (20) Word has length 71 [2022-11-18 20:41:44,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:41:44,607 INFO L225 Difference]: With dead ends: 118 [2022-11-18 20:41:44,608 INFO L226 Difference]: Without dead ends: 100 [2022-11-18 20:41:44,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 75.3s TimeCoverageRelationStatistics Valid=177, Invalid=808, Unknown=11, NotChecked=60, Total=1056 [2022-11-18 20:41:44,609 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 84 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 140 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 19.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:41:44,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 127 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 592 Invalid, 5 Unknown, 73 Unchecked, 19.2s Time] [2022-11-18 20:41:44,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-18 20:41:44,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 91. [2022-11-18 20:41:44,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 60 states have internal predecessors, (62), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (22), 19 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-18 20:41:44,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2022-11-18 20:41:44,641 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 71 [2022-11-18 20:41:44,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:41:44,642 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2022-11-18 20:41:44,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 19 states have internal predecessors, (40), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 10 states have call predecessors, (20), 7 states have call successors, (20) [2022-11-18 20:41:44,643 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2022-11-18 20:41:44,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-18 20:41:44,644 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:41:44,644 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:41:44,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-18 20:41:44,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-18 20:41:44,850 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:41:44,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:41:44,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1620227847, now seen corresponding path program 1 times [2022-11-18 20:41:44,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:41:44,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850856251] [2022-11-18 20:41:44,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:41:44,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:41:44,869 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:41:44,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [14625477] [2022-11-18 20:41:44,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:41:44,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:41:44,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:41:44,871 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:41:44,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:41:44,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:41:44,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-18 20:41:44,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:41:45,642 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 26 proven. 9 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-11-18 20:41:45,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:41:48,145 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-11-18 20:41:48,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:41:48,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850856251] [2022-11-18 20:41:48,146 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:41:48,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14625477] [2022-11-18 20:41:48,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14625477] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:41:48,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:41:48,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2022-11-18 20:41:48,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098388093] [2022-11-18 20:41:48,146 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:41:48,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 20:41:48,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:41:48,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 20:41:48,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:41:48,148 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) [2022-11-18 20:41:50,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:41:50,733 INFO L93 Difference]: Finished difference Result 127 states and 148 transitions. [2022-11-18 20:41:50,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 20:41:50,734 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) Word has length 82 [2022-11-18 20:41:50,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:41:50,735 INFO L225 Difference]: With dead ends: 127 [2022-11-18 20:41:50,735 INFO L226 Difference]: Without dead ends: 97 [2022-11-18 20:41:50,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2022-11-18 20:41:50,737 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 45 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:41:50,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 236 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-18 20:41:50,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-18 20:41:50,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 76. [2022-11-18 20:41:50,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 50 states have internal predecessors, (52), 17 states have call successors, (17), 10 states have call predecessors, (17), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-18 20:41:50,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2022-11-18 20:41:50,769 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 82 [2022-11-18 20:41:50,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:41:50,770 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2022-11-18 20:41:50,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) [2022-11-18 20:41:50,771 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2022-11-18 20:41:50,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-18 20:41:50,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:41:50,772 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:41:50,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-18 20:41:50,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-18 20:41:50,978 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:41:50,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:41:50,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1888027627, now seen corresponding path program 2 times [2022-11-18 20:41:50,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:41:50,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026087129] [2022-11-18 20:41:50,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:41:50,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:41:50,989 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:41:50,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [761522711] [2022-11-18 20:41:50,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:41:50,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:41:50,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:41:50,996 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:41:51,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:41:51,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:41:51,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:41:51,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 20:41:51,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:41:51,116 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-11-18 20:41:51,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:41:51,242 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-11-18 20:41:51,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:41:51,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026087129] [2022-11-18 20:41:51,242 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:41:51,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761522711] [2022-11-18 20:41:51,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761522711] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:41:51,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:41:51,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2022-11-18 20:41:51,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077134372] [2022-11-18 20:41:51,243 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:41:51,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:41:51,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:41:51,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:41:51,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:41:51,245 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-18 20:41:51,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:41:51,340 INFO L93 Difference]: Finished difference Result 108 states and 128 transitions. [2022-11-18 20:41:51,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:41:51,341 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 84 [2022-11-18 20:41:51,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:41:51,342 INFO L225 Difference]: With dead ends: 108 [2022-11-18 20:41:51,342 INFO L226 Difference]: Without dead ends: 81 [2022-11-18 20:41:51,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:41:51,344 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 0 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:41:51,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 147 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:41:51,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-18 20:41:51,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-11-18 20:41:51,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 50 states have (on average 1.08) internal successors, (54), 52 states have internal predecessors, (54), 20 states have call successors, (20), 10 states have call predecessors, (20), 10 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-18 20:41:51,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2022-11-18 20:41:51,370 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 84 [2022-11-18 20:41:51,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:41:51,371 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2022-11-18 20:41:51,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-18 20:41:51,371 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2022-11-18 20:41:51,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-18 20:41:51,373 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:41:51,373 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:41:51,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:41:51,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:41:51,584 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:41:51,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:41:51,584 INFO L85 PathProgramCache]: Analyzing trace with hash -2103086134, now seen corresponding path program 3 times [2022-11-18 20:41:51,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:41:51,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041022517] [2022-11-18 20:41:51,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:41:51,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:41:51,594 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:41:51,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2077197889] [2022-11-18 20:41:51,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:41:51,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:41:51,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:41:51,603 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:41:51,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:41:51,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 20:41:51,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:41:51,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-18 20:41:51,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:41:52,550 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 32 proven. 24 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-11-18 20:41:52,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:42:45,642 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 26 proven. 19 refuted. 5 times theorem prover too weak. 324 trivial. 0 not checked. [2022-11-18 20:42:45,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:42:45,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041022517] [2022-11-18 20:42:45,643 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:42:45,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077197889] [2022-11-18 20:42:45,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077197889] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:42:45,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:42:45,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2022-11-18 20:42:45,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798614454] [2022-11-18 20:42:45,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:42:45,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-18 20:42:45,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:42:45,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-18 20:42:45,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=379, Unknown=4, NotChecked=0, Total=462 [2022-11-18 20:42:45,646 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 18 states have internal predecessors, (45), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (31), 11 states have call predecessors, (31), 10 states have call successors, (31) [2022-11-18 20:44:34,624 WARN L233 SmtUtils]: Spent 1.77m on a formula simplification. DAG size of input: 172 DAG size of output: 48 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:44:36,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:44:38,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:44:40,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:44:42,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:44:44,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:44:46,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:44:48,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:44:52,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:44:54,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:44:56,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:44:58,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:44:59,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:45:01,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:45:03,919 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse43 (div |c_ULTIMATE.start_main_~p~0#1| 2))) (let ((.cse44 (+ .cse43 1)) (.cse39 (mod |c_ULTIMATE.start_main_~B~0#1| 4294967296))) (let ((.cse7 (= (mod |c_ULTIMATE.start_main_~p~0#1| 2) 0)) (.cse2 (* |c_ULTIMATE.start_main_~p~0#1| .cse39)) (.cse37 (< |c_ULTIMATE.start_main_~p~0#1| 0)) (.cse40 (< .cse43 0)) (.cse11 (= (mod .cse43 2) 0)) (.cse41 (* (div |c_ULTIMATE.start_main_~p~0#1| 4) .cse39)) (.cse22 (= (mod .cse44 2) 0)) (.cse1 (* .cse39 |c_ULTIMATE.start_main_~q~0#1|)) (.cse42 (* (div .cse44 2) .cse39)) (.cse38 (* .cse43 .cse39)) (.cse36 (< |c_ULTIMATE.start_main_~d~0#1| 0)) (.cse33 (= (mod |c_ULTIMATE.start_main_~d~0#1| 2) 0))) (let ((.cse3 (and .cse36 (not .cse33))) (.cse21 (+ .cse1 |c_ULTIMATE.start_main_~r~0#1| .cse42 (* 2 .cse39) .cse38)) (.cse24 (+ .cse1 .cse39 |c_ULTIMATE.start_main_~r~0#1| .cse42 .cse38)) (.cse23 (not .cse22)) (.cse15 (+ .cse41 .cse1 |c_ULTIMATE.start_main_~r~0#1| .cse38)) (.cse16 (and .cse40 (not .cse11))) (.cse13 (+ .cse41 .cse1 .cse39 |c_ULTIMATE.start_main_~r~0#1| .cse38)) (.cse12 (not .cse40)) (.cse4 (not .cse37)) (.cse6 (+ .cse1 .cse39 |c_ULTIMATE.start_main_~r~0#1| .cse38 .cse2)) (.cse9 (+ .cse1 |c_ULTIMATE.start_main_~r~0#1| .cse38 .cse2)) (.cse8 (and (not .cse7) .cse37)) (.cse10 (div |c_ULTIMATE.start_main_~d~0#1| 2)) (.cse0 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse34 (not .cse36))) (and (= (+ (* 3 |c_ULTIMATE.start_main_~d~0#1|) .cse0) (+ .cse1 |c_ULTIMATE.start_main_~r~0#1| (* 3 .cse2))) (or .cse3 (let ((.cse5 (+ .cse10 |c_ULTIMATE.start_main_~d~0#1| .cse0))) (and (or .cse4 (= .cse5 .cse6) .cse7) (or .cse8 (= .cse5 .cse9))))) (or .cse3 (let ((.cse20 (= (mod .cse10 2) 0)) (.cse26 (< .cse10 0)) (.cse25 (div |c_ULTIMATE.start_main_~d~0#1| 4))) (let ((.cse14 (+ .cse10 .cse25 .cse0)) (.cse17 (and (not .cse20) .cse26)) (.cse18 (not .cse26)) (.cse19 (+ .cse10 .cse25 .cse0 1))) (and (or .cse8 (and (or (and (or .cse11 .cse12 (= .cse13 .cse14)) (or (= .cse15 .cse14) .cse16)) .cse17) (or .cse18 (and (or (= .cse13 .cse19) .cse11 .cse12) (or .cse16 (= .cse15 .cse19))) .cse20))) (or .cse4 (and (or (and (or (= .cse21 .cse14) .cse22) (or .cse23 (= .cse24 .cse14))) .cse17) (or .cse18 (and (or .cse22 (= .cse21 .cse19)) (or .cse23 (= .cse24 .cse19))) .cse20)) .cse7))))) (or (let ((.cse32 (+ .cse10 1))) (let ((.cse31 (div .cse32 2)) (.cse30 (= (mod .cse32 2) 0))) (let ((.cse27 (not .cse30)) (.cse28 (+ .cse10 .cse31 .cse0 1)) (.cse29 (+ .cse10 .cse31 2 .cse0))) (and (or .cse4 (and (or .cse27 (and (or .cse23 (= .cse28 .cse24)) (or (= .cse28 .cse21) .cse22))) (or (and (or (= .cse21 .cse29) .cse22) (or (= .cse24 .cse29) .cse23)) .cse30)) .cse7) (or .cse8 (and (or .cse27 (and (or .cse11 .cse12 (= .cse28 .cse13)) (or (= .cse28 .cse15) .cse16))) (or (and (or (= .cse15 .cse29) .cse16) (or .cse11 (= .cse13 .cse29) .cse12)) .cse30))))))) .cse33 .cse34) (or .cse33 (let ((.cse35 (+ .cse10 |c_ULTIMATE.start_main_~d~0#1| .cse0 1))) (and (or .cse4 (= .cse6 .cse35) .cse7) (or (= .cse35 .cse9) .cse8))) .cse34)))))) is different from false [2022-11-18 20:47:38,223 WARN L233 SmtUtils]: Spent 2.52m on a formula simplification. DAG size of input: 142 DAG size of output: 142 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:47:42,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:47:47,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:47:57,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:48:01,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:48:05,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:48:05,924 INFO L93 Difference]: Finished difference Result 208 states and 268 transitions. [2022-11-18 20:48:05,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 20:48:05,926 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 18 states have internal predecessors, (45), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (31), 11 states have call predecessors, (31), 10 states have call successors, (31) Word has length 101 [2022-11-18 20:48:05,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:48:05,927 INFO L225 Difference]: With dead ends: 208 [2022-11-18 20:48:05,927 INFO L226 Difference]: Without dead ends: 185 [2022-11-18 20:48:05,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 179 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 285.0s TimeCoverageRelationStatistics Valid=116, Invalid=585, Unknown=5, NotChecked=50, Total=756 [2022-11-18 20:48:05,929 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 81 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 122 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 53.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:48:05,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 443 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1137 Invalid, 13 Unknown, 2 Unchecked, 53.3s Time] [2022-11-18 20:48:05,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-18 20:48:06,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 150. [2022-11-18 20:48:06,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 90 states have (on average 1.1) internal successors, (99), 94 states have internal predecessors, (99), 43 states have call successors, (43), 16 states have call predecessors, (43), 16 states have return successors, (42), 39 states have call predecessors, (42), 42 states have call successors, (42) [2022-11-18 20:48:06,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 184 transitions. [2022-11-18 20:48:06,022 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 184 transitions. Word has length 101 [2022-11-18 20:48:06,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:48:06,023 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 184 transitions. [2022-11-18 20:48:06,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 18 states have internal predecessors, (45), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (31), 11 states have call predecessors, (31), 10 states have call successors, (31) [2022-11-18 20:48:06,023 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 184 transitions. [2022-11-18 20:48:06,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-18 20:48:06,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:48:06,025 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:48:06,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:48:06,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 20:48:06,231 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:48:06,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:48:06,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1168936300, now seen corresponding path program 2 times [2022-11-18 20:48:06,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:48:06,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291716282] [2022-11-18 20:48:06,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:48:06,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:48:06,241 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:48:06,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1074102282] [2022-11-18 20:48:06,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:48:06,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:48:06,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:48:06,243 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:48:06,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:48:06,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:48:06,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:48:06,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-18 20:48:06,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:48:07,522 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 32 proven. 68 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-11-18 20:48:07,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:48:22,951 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 32 proven. 68 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-11-18 20:48:22,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:48:22,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291716282] [2022-11-18 20:48:22,951 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:48:22,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074102282] [2022-11-18 20:48:22,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074102282] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:48:22,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:48:22,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2022-11-18 20:48:22,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297482103] [2022-11-18 20:48:22,953 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:48:22,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-18 20:48:22,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:48:22,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-18 20:48:22,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2022-11-18 20:48:22,958 INFO L87 Difference]: Start difference. First operand 150 states and 184 transitions. Second operand has 26 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 16 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 14 states have call predecessors, (33), 14 states have call successors, (33) [2022-11-18 20:48:39,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:48:49,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:48:53,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:48:53,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:48:53,199 INFO L93 Difference]: Finished difference Result 201 states and 256 transitions. [2022-11-18 20:48:53,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-18 20:48:53,205 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 16 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 14 states have call predecessors, (33), 14 states have call successors, (33) Word has length 112 [2022-11-18 20:48:53,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:48:53,207 INFO L225 Difference]: With dead ends: 201 [2022-11-18 20:48:53,208 INFO L226 Difference]: Without dead ends: 155 [2022-11-18 20:48:53,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=346, Invalid=1060, Unknown=0, NotChecked=0, Total=1406 [2022-11-18 20:48:53,209 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 99 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 234 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:48:53,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 221 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 731 Invalid, 2 Unknown, 0 Unchecked, 17.5s Time] [2022-11-18 20:48:53,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-18 20:48:53,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 136. [2022-11-18 20:48:53,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 81 states have (on average 1.1111111111111112) internal successors, (90), 85 states have internal predecessors, (90), 40 states have call successors, (40), 14 states have call predecessors, (40), 14 states have return successors, (39), 36 states have call predecessors, (39), 39 states have call successors, (39) [2022-11-18 20:48:53,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 169 transitions. [2022-11-18 20:48:53,342 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 169 transitions. Word has length 112 [2022-11-18 20:48:53,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:48:53,342 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 169 transitions. [2022-11-18 20:48:53,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 16 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 14 states have call predecessors, (33), 14 states have call successors, (33) [2022-11-18 20:48:53,343 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 169 transitions. [2022-11-18 20:48:53,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-18 20:48:53,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:48:53,344 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:48:53,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:48:53,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 20:48:53,559 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:48:53,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:48:53,560 INFO L85 PathProgramCache]: Analyzing trace with hash -929042098, now seen corresponding path program 4 times [2022-11-18 20:48:53,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:48:53,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358733579] [2022-11-18 20:48:53,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:48:53,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:48:53,570 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:48:53,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [244365713] [2022-11-18 20:48:53,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:48:53,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:48:53,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:48:53,572 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:48:53,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b504702-eb2e-437c-b800-c000dd989c06/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:48:53,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:48:53,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:48:53,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-18 20:48:53,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:48:55,373 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 60 proven. 69 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked. [2022-11-18 20:48:55,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:49:21,195 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 34 proven. 41 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2022-11-18 20:49:21,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:49:21,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358733579] [2022-11-18 20:49:21,196 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:49:21,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244365713] [2022-11-18 20:49:21,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244365713] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:49:21,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:49:21,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 28 [2022-11-18 20:49:21,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809950983] [2022-11-18 20:49:21,197 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:49:21,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-18 20:49:21,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:49:21,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-18 20:49:21,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-11-18 20:49:21,199 INFO L87 Difference]: Start difference. First operand 136 states and 169 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 16 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (40), 16 states have call predecessors, (40), 16 states have call successors, (40) [2022-11-18 20:51:08,164 WARN L233 SmtUtils]: Spent 1.73m on a formula simplification. DAG size of input: 165 DAG size of output: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:51:12,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 20:51:13,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 20:51:17,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:51:19,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:51:21,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:51:23,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:51:26,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:51:43,024 WARN L233 SmtUtils]: Spent 15.07s on a formula simplification. DAG size of input: 94 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:51:45,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:51:47,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:51:49,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []