./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814a5c11-247a-451e-bf15-991bd7d86dfd/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814a5c11-247a-451e-bf15-991bd7d86dfd/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814a5c11-247a-451e-bf15-991bd7d86dfd/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814a5c11-247a-451e-bf15-991bd7d86dfd/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814a5c11-247a-451e-bf15-991bd7d86dfd/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814a5c11-247a-451e-bf15-991bd7d86dfd/bin/uautomizer-w2VwFs6gM0 --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 28cfabe4b70eff8f7baaccb87c67f08c79dbf056ceeb2a0d56109f4b60f10f62 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 14:57:06,638 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 14:57:06,641 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 14:57:06,677 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 14:57:06,678 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 14:57:06,679 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 14:57:06,681 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 14:57:06,684 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 14:57:06,686 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 14:57:06,687 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 14:57:06,689 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 14:57:06,690 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 14:57:06,691 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 14:57:06,692 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 14:57:06,694 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 14:57:06,695 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 14:57:06,698 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 14:57:06,700 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 14:57:06,702 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 14:57:06,704 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 14:57:06,706 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 14:57:06,710 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 14:57:06,714 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 14:57:06,715 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 14:57:06,726 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 14:57:06,727 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 14:57:06,727 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 14:57:06,735 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 14:57:06,735 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 14:57:06,737 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 14:57:06,737 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 14:57:06,738 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 14:57:06,739 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 14:57:06,740 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 14:57:06,741 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 14:57:06,742 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 14:57:06,743 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 14:57:06,743 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 14:57:06,743 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 14:57:06,745 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 14:57:06,746 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 14:57:06,748 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814a5c11-247a-451e-bf15-991bd7d86dfd/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 14:57:06,797 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 14:57:06,798 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 14:57:06,798 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 14:57:06,799 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 14:57:06,807 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 14:57:06,807 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 14:57:06,807 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 14:57:06,807 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 14:57:06,807 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 14:57:06,808 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 14:57:06,809 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 14:57:06,809 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 14:57:06,809 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 14:57:06,809 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 14:57:06,810 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 14:57:06,810 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 14:57:06,810 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 14:57:06,810 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 14:57:06,810 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 14:57:06,811 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 14:57:06,811 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 14:57:06,811 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 14:57:06,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:57:06,812 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 14:57:06,812 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 14:57:06,812 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 14:57:06,812 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 14:57:06,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 14:57:06,813 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 14:57:06,813 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 14:57:06,813 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 14:57:06,813 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 14:57:06,813 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_814a5c11-247a-451e-bf15-991bd7d86dfd/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814a5c11-247a-451e-bf15-991bd7d86dfd/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 28cfabe4b70eff8f7baaccb87c67f08c79dbf056ceeb2a0d56109f4b60f10f62 [2021-11-22 14:57:07,111 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 14:57:07,132 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 14:57:07,135 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 14:57:07,136 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 14:57:07,137 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 14:57:07,138 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814a5c11-247a-451e-bf15-991bd7d86dfd/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound20.c [2021-11-22 14:57:07,197 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814a5c11-247a-451e-bf15-991bd7d86dfd/bin/uautomizer-w2VwFs6gM0/data/78d435ffe/2cdb1e1542d34624bf124dc44f234d56/FLAG598e41bdf [2021-11-22 14:57:07,739 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 14:57:07,740 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814a5c11-247a-451e-bf15-991bd7d86dfd/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound20.c [2021-11-22 14:57:07,752 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814a5c11-247a-451e-bf15-991bd7d86dfd/bin/uautomizer-w2VwFs6gM0/data/78d435ffe/2cdb1e1542d34624bf124dc44f234d56/FLAG598e41bdf [2021-11-22 14:57:08,112 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814a5c11-247a-451e-bf15-991bd7d86dfd/bin/uautomizer-w2VwFs6gM0/data/78d435ffe/2cdb1e1542d34624bf124dc44f234d56 [2021-11-22 14:57:08,115 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 14:57:08,116 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 14:57:08,118 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 14:57:08,118 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 14:57:08,122 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 14:57:08,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:57:08" (1/1) ... [2021-11-22 14:57:08,124 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aa27b98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:57:08, skipping insertion in model container [2021-11-22 14:57:08,124 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:57:08" (1/1) ... [2021-11-22 14:57:08,135 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 14:57:08,150 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 14:57:08,350 WARN L230 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_814a5c11-247a-451e-bf15-991bd7d86dfd/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound20.c[537,550] [2021-11-22 14:57:08,374 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:57:08,382 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 14:57:08,395 WARN L230 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_814a5c11-247a-451e-bf15-991bd7d86dfd/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound20.c[537,550] [2021-11-22 14:57:08,403 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:57:08,416 INFO L208 MainTranslator]: Completed translation [2021-11-22 14:57:08,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:57:08 WrapperNode [2021-11-22 14:57:08,417 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 14:57:08,418 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 14:57:08,419 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 14:57:08,419 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 14:57:08,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:57:08" (1/1) ... [2021-11-22 14:57:08,446 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:57:08" (1/1) ... [2021-11-22 14:57:08,468 INFO L137 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 100 [2021-11-22 14:57:08,468 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 14:57:08,469 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 14:57:08,469 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 14:57:08,470 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 14:57:08,479 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:57:08" (1/1) ... [2021-11-22 14:57:08,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:57:08" (1/1) ... [2021-11-22 14:57:08,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:57:08" (1/1) ... [2021-11-22 14:57:08,481 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:57:08" (1/1) ... [2021-11-22 14:57:08,486 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:57:08" (1/1) ... [2021-11-22 14:57:08,492 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:57:08" (1/1) ... [2021-11-22 14:57:08,493 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:57:08" (1/1) ... [2021-11-22 14:57:08,495 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 14:57:08,497 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 14:57:08,497 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 14:57:08,497 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 14:57:08,498 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:57:08" (1/1) ... [2021-11-22 14:57:08,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:57:08,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814a5c11-247a-451e-bf15-991bd7d86dfd/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:57:08,539 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814a5c11-247a-451e-bf15-991bd7d86dfd/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 14:57:08,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814a5c11-247a-451e-bf15-991bd7d86dfd/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 14:57:08,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 14:57:08,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 14:57:08,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 14:57:08,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 14:57:08,645 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 14:57:08,647 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 14:57:08,903 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 14:57:08,910 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 14:57:08,910 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-22 14:57:08,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:57:08 BoogieIcfgContainer [2021-11-22 14:57:08,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 14:57:08,915 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 14:57:08,924 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 14:57:08,928 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 14:57:08,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:57:08" (1/3) ... [2021-11-22 14:57:08,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54e35de3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:57:08, skipping insertion in model container [2021-11-22 14:57:08,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:57:08" (2/3) ... [2021-11-22 14:57:08,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54e35de3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:57:08, skipping insertion in model container [2021-11-22 14:57:08,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:57:08" (3/3) ... [2021-11-22 14:57:08,932 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound20.c [2021-11-22 14:57:08,937 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 14:57:08,950 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-11-22 14:57:09,009 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 14:57:09,016 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-22 14:57:09,016 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-11-22 14:57:09,032 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 42 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:57:09,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-22 14:57:09,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:57:09,041 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:57:09,042 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-22 14:57:09,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:57:09,051 INFO L85 PathProgramCache]: Analyzing trace with hash 119446382, now seen corresponding path program 1 times [2021-11-22 14:57:09,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:57:09,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571483452] [2021-11-22 14:57:09,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:57:09,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:57:09,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:57:09,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:57:09,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:57:09,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571483452] [2021-11-22 14:57:09,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571483452] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:57:09,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:57:09,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 14:57:09,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802309496] [2021-11-22 14:57:09,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:57:09,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-22 14:57:09,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:57:09,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-22 14:57:09,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 14:57:09,291 INFO L87 Difference]: Start difference. First operand has 43 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 42 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:57:09,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:57:09,321 INFO L93 Difference]: Finished difference Result 83 states and 110 transitions. [2021-11-22 14:57:09,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-22 14:57:09,323 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-22 14:57:09,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:57:09,335 INFO L225 Difference]: With dead ends: 83 [2021-11-22 14:57:09,336 INFO L226 Difference]: Without dead ends: 39 [2021-11-22 14:57:09,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 14:57:09,347 INFO L933 BasicCegarLoop]: 47 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, 47 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 [2021-11-22 14:57:09,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:57:09,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-22 14:57:09,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-22 14:57:09,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.34375) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:57:09,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-11-22 14:57:09,393 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 8 [2021-11-22 14:57:09,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:57:09,394 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-11-22 14:57:09,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:57:09,394 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-11-22 14:57:09,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-22 14:57:09,395 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:57:09,396 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:57:09,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 14:57:09,397 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-22 14:57:09,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:57:09,401 INFO L85 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2021-11-22 14:57:09,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:57:09,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69104880] [2021-11-22 14:57:09,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:57:09,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:57:09,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:57:09,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:57:09,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:57:09,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69104880] [2021-11-22 14:57:09,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69104880] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:57:09,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:57:09,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 14:57:09,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385948933] [2021-11-22 14:57:09,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:57:09,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:57:09,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:57:09,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:57:09,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:57:09,554 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:57:09,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:57:09,658 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2021-11-22 14:57:09,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 14:57:09,659 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-22 14:57:09,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:57:09,663 INFO L225 Difference]: With dead ends: 64 [2021-11-22 14:57:09,664 INFO L226 Difference]: Without dead ends: 62 [2021-11-22 14:57:09,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:57:09,670 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 54 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:57:09,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 75 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:57:09,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-22 14:57:09,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 37. [2021-11-22 14:57:09,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:57:09,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-11-22 14:57:09,690 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 8 [2021-11-22 14:57:09,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:57:09,691 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-11-22 14:57:09,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:57:09,692 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-11-22 14:57:09,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-22 14:57:09,694 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:57:09,694 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:57:09,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 14:57:09,696 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-22 14:57:09,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:57:09,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1986040785, now seen corresponding path program 1 times [2021-11-22 14:57:09,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:57:09,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510592079] [2021-11-22 14:57:09,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:57:09,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:57:09,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:57:09,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:57:09,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:57:09,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510592079] [2021-11-22 14:57:09,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510592079] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:57:09,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:57:09,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:57:09,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791033689] [2021-11-22 14:57:09,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:57:09,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:57:09,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:57:09,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:57:09,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:57:09,754 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:57:09,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:57:09,771 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2021-11-22 14:57:09,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:57:09,772 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-22 14:57:09,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:57:09,773 INFO L225 Difference]: With dead ends: 59 [2021-11-22 14:57:09,773 INFO L226 Difference]: Without dead ends: 39 [2021-11-22 14:57:09,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:57:09,775 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:57:09,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 110 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:57:09,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-22 14:57:09,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-22 14:57:09,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.303030303030303) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:57:09,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-11-22 14:57:09,783 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 10 [2021-11-22 14:57:09,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:57:09,783 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-11-22 14:57:09,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:57:09,784 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-11-22 14:57:09,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-22 14:57:09,784 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:57:09,784 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:57:09,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 14:57:09,785 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-22 14:57:09,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:57:09,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1985334737, now seen corresponding path program 1 times [2021-11-22 14:57:09,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:57:09,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884782655] [2021-11-22 14:57:09,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:57:09,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:57:09,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:57:09,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:57:09,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:57:09,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884782655] [2021-11-22 14:57:09,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884782655] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:57:09,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:57:09,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 14:57:09,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182825436] [2021-11-22 14:57:09,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:57:09,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:57:09,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:57:09,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:57:09,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:57:09,886 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:57:09,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:57:09,975 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2021-11-22 14:57:09,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 14:57:09,976 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-22 14:57:09,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:57:09,978 INFO L225 Difference]: With dead ends: 59 [2021-11-22 14:57:09,978 INFO L226 Difference]: Without dead ends: 57 [2021-11-22 14:57:09,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:57:09,989 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 47 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:57:09,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 63 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:57:09,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-22 14:57:10,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 37. [2021-11-22 14:57:10,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.28125) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:57:10,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-11-22 14:57:10,008 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 10 [2021-11-22 14:57:10,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:57:10,009 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-11-22 14:57:10,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:57:10,010 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-11-22 14:57:10,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-22 14:57:10,011 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:57:10,011 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:57:10,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-22 14:57:10,012 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-22 14:57:10,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:57:10,013 INFO L85 PathProgramCache]: Analyzing trace with hash -941046702, now seen corresponding path program 1 times [2021-11-22 14:57:10,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:57:10,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833121520] [2021-11-22 14:57:10,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:57:10,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:57:10,038 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:57:10,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [683478550] [2021-11-22 14:57:10,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:57:10,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:57:10,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814a5c11-247a-451e-bf15-991bd7d86dfd/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:57:10,040 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814a5c11-247a-451e-bf15-991bd7d86dfd/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:57:10,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814a5c11-247a-451e-bf15-991bd7d86dfd/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 14:57:10,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:57:10,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-22 14:57:10,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:57:10,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:57:10,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 14:57:10,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:57:10,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833121520] [2021-11-22 14:57:10,303 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:57:10,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683478550] [2021-11-22 14:57:10,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683478550] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:57:10,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:57:10,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 14:57:10,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689117934] [2021-11-22 14:57:10,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:57:10,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:57:10,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:57:10,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:57:10,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:57:10,307 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:57:12,387 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-22 14:57:12,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:57:12,593 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2021-11-22 14:57:12,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 14:57:12,594 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-22 14:57:12,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:57:12,595 INFO L225 Difference]: With dead ends: 70 [2021-11-22 14:57:12,595 INFO L226 Difference]: Without dead ends: 62 [2021-11-22 14:57:12,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:57:12,596 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 29 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-22 14:57:12,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 76 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 40 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-22 14:57:12,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-22 14:57:12,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2021-11-22 14:57:12,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:57:12,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-11-22 14:57:12,605 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 12 [2021-11-22 14:57:12,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:57:12,606 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-11-22 14:57:12,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:57:12,606 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-11-22 14:57:12,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-22 14:57:12,607 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:57:12,607 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:57:12,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814a5c11-247a-451e-bf15-991bd7d86dfd/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 14:57:12,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814a5c11-247a-451e-bf15-991bd7d86dfd/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:57:12,832 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-22 14:57:12,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:57:12,832 INFO L85 PathProgramCache]: Analyzing trace with hash 12618603, now seen corresponding path program 1 times [2021-11-22 14:57:12,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:57:12,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713990556] [2021-11-22 14:57:12,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:57:12,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:57:12,858 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:57:12,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [964955122] [2021-11-22 14:57:12,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:57:12,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:57:12,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814a5c11-247a-451e-bf15-991bd7d86dfd/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:57:12,864 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814a5c11-247a-451e-bf15-991bd7d86dfd/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:57:12,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814a5c11-247a-451e-bf15-991bd7d86dfd/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 14:57:12,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:57:12,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-22 14:57:12,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:57:13,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:57:13,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 14:57:13,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:57:13,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713990556] [2021-11-22 14:57:13,239 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:57:13,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964955122] [2021-11-22 14:57:13,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964955122] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:57:13,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:57:13,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 14:57:13,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965318201] [2021-11-22 14:57:13,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:57:13,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 14:57:13,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:57:13,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 14:57:13,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:57:13,241 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:57:13,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:57:13,567 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2021-11-22 14:57:13,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 14:57:13,570 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-22 14:57:13,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:57:13,571 INFO L225 Difference]: With dead ends: 73 [2021-11-22 14:57:13,571 INFO L226 Difference]: Without dead ends: 67 [2021-11-22 14:57:13,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-22 14:57:13,572 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 35 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:57:13,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 105 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 14:57:13,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-22 14:57:13,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2021-11-22 14:57:13,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.25) internal successors, (70), 60 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:57:13,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2021-11-22 14:57:13,581 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 17 [2021-11-22 14:57:13,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:57:13,581 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2021-11-22 14:57:13,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:57:13,581 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2021-11-22 14:57:13,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-22 14:57:13,582 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:57:13,582 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:57:13,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814a5c11-247a-451e-bf15-991bd7d86dfd/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 14:57:13,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814a5c11-247a-451e-bf15-991bd7d86dfd/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:57:13,798 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-22 14:57:13,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:57:13,799 INFO L85 PathProgramCache]: Analyzing trace with hash -463138512, now seen corresponding path program 1 times [2021-11-22 14:57:13,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:57:13,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530354286] [2021-11-22 14:57:13,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:57:13,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:57:13,809 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:57:13,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [453218700] [2021-11-22 14:57:13,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:57:13,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:57:13,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814a5c11-247a-451e-bf15-991bd7d86dfd/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:57:13,810 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814a5c11-247a-451e-bf15-991bd7d86dfd/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:57:13,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814a5c11-247a-451e-bf15-991bd7d86dfd/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 14:57:13,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:57:13,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-22 14:57:13,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:57:13,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:57:13,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:57:14,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:57:14,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:57:14,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530354286] [2021-11-22 14:57:14,044 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:57:14,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453218700] [2021-11-22 14:57:14,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453218700] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:57:14,045 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:57:14,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-22 14:57:14,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625450245] [2021-11-22 14:57:14,045 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:57:14,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 14:57:14,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:57:14,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 14:57:14,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-22 14:57:14,046 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:57:14,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:57:14,141 INFO L93 Difference]: Finished difference Result 138 states and 161 transitions. [2021-11-22 14:57:14,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 14:57:14,141 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-22 14:57:14,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:57:14,143 INFO L225 Difference]: With dead ends: 138 [2021-11-22 14:57:14,143 INFO L226 Difference]: Without dead ends: 118 [2021-11-22 14:57:14,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-22 14:57:14,144 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 54 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:57:14,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 218 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:57:14,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-22 14:57:14,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2021-11-22 14:57:14,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.236842105263158) internal successors, (94), 80 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:57:14,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2021-11-22 14:57:14,157 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 19 [2021-11-22 14:57:14,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:57:14,157 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2021-11-22 14:57:14,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:57:14,158 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2021-11-22 14:57:14,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-22 14:57:14,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:57:14,159 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:57:14,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814a5c11-247a-451e-bf15-991bd7d86dfd/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 14:57:14,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814a5c11-247a-451e-bf15-991bd7d86dfd/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:57:14,374 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-22 14:57:14,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:57:14,375 INFO L85 PathProgramCache]: Analyzing trace with hash -2015810285, now seen corresponding path program 1 times [2021-11-22 14:57:14,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:57:14,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244690072] [2021-11-22 14:57:14,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:57:14,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:57:14,384 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:57:14,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999507294] [2021-11-22 14:57:14,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:57:14,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:57:14,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814a5c11-247a-451e-bf15-991bd7d86dfd/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:57:14,386 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814a5c11-247a-451e-bf15-991bd7d86dfd/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:57:14,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814a5c11-247a-451e-bf15-991bd7d86dfd/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 14:57:14,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:57:14,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-22 14:57:14,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:57:14,901 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:57:14,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:57:17,506 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:57:17,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:57:17,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244690072] [2021-11-22 14:57:17,506 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 14:57:17,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999507294] [2021-11-22 14:57:17,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999507294] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:57:17,507 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:57:17,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2021-11-22 14:57:17,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99008834] [2021-11-22 14:57:17,507 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:57:17,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 14:57:17,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:57:17,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 14:57:17,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-22 14:57:17,509 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:57:18,809 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:57:22,079 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-22 14:57:24,244 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:57:27,121 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:57:28,970 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 14:57:28,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:57:28,971 INFO L93 Difference]: Finished difference Result 125 states and 140 transitions. [2021-11-22 14:57:28,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 14:57:28,978 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-22 14:57:28,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:57:28,979 INFO L225 Difference]: With dead ends: 125 [2021-11-22 14:57:28,979 INFO L226 Difference]: Without dead ends: 113 [2021-11-22 14:57:28,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-11-22 14:57:28,981 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 186 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 32 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:57:28,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 177 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 102 Invalid, 2 Unknown, 0 Unchecked, 11.1s Time] [2021-11-22 14:57:28,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-22 14:57:28,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 91. [2021-11-22 14:57:28,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 87 states have (on average 1.2183908045977012) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:57:28,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2021-11-22 14:57:28,997 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 21 [2021-11-22 14:57:28,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:57:28,998 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2021-11-22 14:57:28,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:57:28,998 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2021-11-22 14:57:28,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-22 14:57:28,999 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:57:29,000 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:57:29,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814a5c11-247a-451e-bf15-991bd7d86dfd/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 14:57:29,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814a5c11-247a-451e-bf15-991bd7d86dfd/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:57:29,204 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-22 14:57:29,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:57:29,204 INFO L85 PathProgramCache]: Analyzing trace with hash -850742503, now seen corresponding path program 1 times [2021-11-22 14:57:29,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:57:29,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612065382] [2021-11-22 14:57:29,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:57:29,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:57:29,214 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 14:57:29,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [709527859] [2021-11-22 14:57:29,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:57:29,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:57:29,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814a5c11-247a-451e-bf15-991bd7d86dfd/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:57:29,215 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814a5c11-247a-451e-bf15-991bd7d86dfd/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:57:29,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_814a5c11-247a-451e-bf15-991bd7d86dfd/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process