./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/xor3.i --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_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/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_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/xor3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/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_835e9555-22d7-4747-8d2a-df3a03ab6826/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 c89c2ec3a6d8d6162c4c4ac97fed99fb9c343c7a2c2e60d87226da2b47103d07 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 15:28:50,944 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 15:28:50,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 15:28:50,999 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 15:28:51,000 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 15:28:51,001 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 15:28:51,003 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 15:28:51,006 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 15:28:51,010 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 15:28:51,011 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 15:28:51,013 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 15:28:51,015 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 15:28:51,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 15:28:51,018 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 15:28:51,020 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 15:28:51,023 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 15:28:51,026 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 15:28:51,031 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 15:28:51,033 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 15:28:51,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 15:28:51,047 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 15:28:51,049 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 15:28:51,056 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 15:28:51,057 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 15:28:51,061 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 15:28:51,068 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 15:28:51,068 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 15:28:51,069 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 15:28:51,070 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 15:28:51,072 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 15:28:51,077 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 15:28:51,078 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 15:28:51,079 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 15:28:51,080 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 15:28:51,081 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 15:28:51,082 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 15:28:51,082 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 15:28:51,083 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 15:28:51,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 15:28:51,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 15:28:51,085 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 15:28:51,086 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 15:28:51,113 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 15:28:51,113 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 15:28:51,114 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 15:28:51,114 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 15:28:51,115 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 15:28:51,115 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 15:28:51,116 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 15:28:51,116 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 15:28:51,116 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 15:28:51,116 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 15:28:51,117 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 15:28:51,117 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 15:28:51,117 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 15:28:51,117 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 15:28:51,117 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 15:28:51,117 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 15:28:51,118 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 15:28:51,118 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 15:28:51,118 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 15:28:51,118 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 15:28:51,119 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 15:28:51,119 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 15:28:51,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:28:51,119 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 15:28:51,119 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 15:28:51,120 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 15:28:51,120 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 15:28:51,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 15:28:51,120 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 15:28:51,121 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 15:28:51,121 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 15:28:51,121 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 15:28:51,121 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_835e9555-22d7-4747-8d2a-df3a03ab6826/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c89c2ec3a6d8d6162c4c4ac97fed99fb9c343c7a2c2e60d87226da2b47103d07 [2021-11-22 15:28:51,398 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 15:28:51,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 15:28:51,426 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 15:28:51,428 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 15:28:51,429 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 15:28:51,430 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/array-crafted/xor3.i [2021-11-22 15:28:51,526 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/data/83c61e556/3f2e4a58f82f4e239a9f7e07559c9b53/FLAGef0dade1b [2021-11-22 15:28:51,969 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 15:28:51,970 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/sv-benchmarks/c/array-crafted/xor3.i [2021-11-22 15:28:51,977 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/data/83c61e556/3f2e4a58f82f4e239a9f7e07559c9b53/FLAGef0dade1b [2021-11-22 15:28:52,351 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/data/83c61e556/3f2e4a58f82f4e239a9f7e07559c9b53 [2021-11-22 15:28:52,355 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 15:28:52,356 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 15:28:52,358 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 15:28:52,359 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 15:28:52,363 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 15:28:52,364 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:28:52" (1/1) ... [2021-11-22 15:28:52,365 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20942deb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:28:52, skipping insertion in model container [2021-11-22 15:28:52,365 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:28:52" (1/1) ... [2021-11-22 15:28:52,373 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 15:28:52,390 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 15:28:52,600 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_835e9555-22d7-4747-8d2a-df3a03ab6826/sv-benchmarks/c/array-crafted/xor3.i[1297,1310] [2021-11-22 15:28:52,604 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:28:52,611 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 15:28:52,633 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_835e9555-22d7-4747-8d2a-df3a03ab6826/sv-benchmarks/c/array-crafted/xor3.i[1297,1310] [2021-11-22 15:28:52,634 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:28:52,648 INFO L208 MainTranslator]: Completed translation [2021-11-22 15:28:52,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:28:52 WrapperNode [2021-11-22 15:28:52,649 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 15:28:52,650 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 15:28:52,650 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 15:28:52,650 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 15:28:52,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:28:52" (1/1) ... [2021-11-22 15:28:52,664 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:28:52" (1/1) ... [2021-11-22 15:28:52,692 INFO L137 Inliner]: procedures = 16, calls = 30, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 131 [2021-11-22 15:28:52,693 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 15:28:52,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 15:28:52,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 15:28:52,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 15:28:52,704 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:28:52" (1/1) ... [2021-11-22 15:28:52,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:28:52" (1/1) ... [2021-11-22 15:28:52,707 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:28:52" (1/1) ... [2021-11-22 15:28:52,708 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:28:52" (1/1) ... [2021-11-22 15:28:52,721 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:28:52" (1/1) ... [2021-11-22 15:28:52,727 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:28:52" (1/1) ... [2021-11-22 15:28:52,729 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:28:52" (1/1) ... [2021-11-22 15:28:52,731 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 15:28:52,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 15:28:52,733 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 15:28:52,733 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 15:28:52,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:28:52" (1/1) ... [2021-11-22 15:28:52,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:28:52,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:28:52,778 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 15:28:52,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 15:28:52,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 15:28:52,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 15:28:52,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-22 15:28:52,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-22 15:28:52,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 15:28:52,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 15:28:52,840 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-22 15:28:52,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 15:28:52,911 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 15:28:52,912 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 15:28:53,111 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 15:28:53,129 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 15:28:53,130 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-22 15:28:53,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:28:53 BoogieIcfgContainer [2021-11-22 15:28:53,132 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 15:28:53,134 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 15:28:53,135 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 15:28:53,156 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 15:28:53,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 03:28:52" (1/3) ... [2021-11-22 15:28:53,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43e0cb6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:28:53, skipping insertion in model container [2021-11-22 15:28:53,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:28:52" (2/3) ... [2021-11-22 15:28:53,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43e0cb6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:28:53, skipping insertion in model container [2021-11-22 15:28:53,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:28:53" (3/3) ... [2021-11-22 15:28:53,160 INFO L111 eAbstractionObserver]: Analyzing ICFG xor3.i [2021-11-22 15:28:53,166 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 15:28:53,166 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 15:28:53,231 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 15:28:53,239 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 15:28:53,240 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-22 15:28:53,256 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 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 15:28:53,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-22 15:28:53,277 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:28:53,278 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 15:28:53,279 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:28:53,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:28:53,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1858201700, now seen corresponding path program 1 times [2021-11-22 15:28:53,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:28:53,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503369724] [2021-11-22 15:28:53,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:28:53,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:28:53,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:28:53,567 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 15:28:53,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:28:53,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503369724] [2021-11-22 15:28:53,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503369724] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:28:53,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:28:53,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:28:53,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442984783] [2021-11-22 15:28:53,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:28:53,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:28:53,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:28:53,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:28:53,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:28:53,621 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 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 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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 15:28:53,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:28:53,676 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-11-22 15:28:53,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:28:53,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 15:28:53,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:28:53,693 INFO L225 Difference]: With dead ends: 52 [2021-11-22 15:28:53,693 INFO L226 Difference]: Without dead ends: 25 [2021-11-22 15:28:53,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:28:53,717 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 1 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:28:53,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 56 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:28:53,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-22 15:28:53,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-11-22 15:28:53,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 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 15:28:53,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-22 15:28:53,757 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2021-11-22 15:28:53,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:28:53,757 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-22 15:28:53,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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 15:28:53,758 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-22 15:28:53,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-22 15:28:53,759 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:28:53,759 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:28:53,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 15:28:53,760 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:28:53,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:28:53,761 INFO L85 PathProgramCache]: Analyzing trace with hash 290125730, now seen corresponding path program 1 times [2021-11-22 15:28:53,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:28:53,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326872948] [2021-11-22 15:28:53,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:28:53,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:28:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:28:53,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:28:53,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:28:53,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326872948] [2021-11-22 15:28:53,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326872948] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:28:53,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98010631] [2021-11-22 15:28:53,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:28:53,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:28:53,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:28:53,828 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:28:53,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 15:28:53,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:28:53,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-22 15:28:53,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:28:54,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:28:54,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 15:28:54,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98010631] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:28:54,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 15:28:54,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-22 15:28:54,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583886985] [2021-11-22 15:28:54,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:28:54,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:28:54,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:28:54,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:28:54,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:28:54,052 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 15:28:54,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:28:54,080 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-11-22 15:28:54,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:28:54,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 15:28:54,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:28:54,082 INFO L225 Difference]: With dead ends: 46 [2021-11-22 15:28:54,082 INFO L226 Difference]: Without dead ends: 30 [2021-11-22 15:28:54,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:28:54,085 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:28:54,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 36 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:28:54,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-22 15:28:54,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2021-11-22 15:28:54,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 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 15:28:54,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-11-22 15:28:54,092 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2021-11-22 15:28:54,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:28:54,093 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-11-22 15:28:54,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 15:28:54,093 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-11-22 15:28:54,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-22 15:28:54,094 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:28:54,095 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:28:54,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 15:28:54,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:28:54,314 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:28:54,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:28:54,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1760334112, now seen corresponding path program 1 times [2021-11-22 15:28:54,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:28:54,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495049326] [2021-11-22 15:28:54,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:28:54,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:28:54,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:28:54,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-22 15:28:54,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:28:54,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495049326] [2021-11-22 15:28:54,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495049326] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:28:54,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294087322] [2021-11-22 15:28:54,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:28:54,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:28:54,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:28:54,430 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:28:54,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 15:28:54,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:28:54,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-22 15:28:54,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:28:54,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 15:28:54,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 15:28:54,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294087322] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:28:54,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 15:28:54,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-22 15:28:54,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38302466] [2021-11-22 15:28:54,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:28:54,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:28:54,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:28:54,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:28:54,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:28:54,627 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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 15:28:54,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:28:54,649 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-11-22 15:28:54,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:28:54,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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 25 [2021-11-22 15:28:54,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:28:54,655 INFO L225 Difference]: With dead ends: 38 [2021-11-22 15:28:54,655 INFO L226 Difference]: Without dead ends: 29 [2021-11-22 15:28:54,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:28:54,662 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:28:54,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 47 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:28:54,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-22 15:28:54,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-11-22 15:28:54,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 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 15:28:54,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-11-22 15:28:54,685 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2021-11-22 15:28:54,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:28:54,685 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-11-22 15:28:54,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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 15:28:54,686 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-11-22 15:28:54,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-22 15:28:54,688 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:28:54,689 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:28:54,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 15:28:54,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-22 15:28:54,918 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:28:54,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:28:54,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1208457118, now seen corresponding path program 1 times [2021-11-22 15:28:54,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:28:54,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253927218] [2021-11-22 15:28:54,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:28:54,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:28:54,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:28:55,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 15:28:55,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:28:55,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253927218] [2021-11-22 15:28:55,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253927218] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:28:55,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636352389] [2021-11-22 15:28:55,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:28:55,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:28:55,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:28:55,003 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:28:55,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 15:28:55,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:28:55,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 15:28:55,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:28:55,136 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 15:28:55,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:28:55,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 15:28:55,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636352389] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:28:55,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:28:55,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-22 15:28:55,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452466844] [2021-11-22 15:28:55,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:28:55,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 15:28:55,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:28:55,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 15:28:55,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:28:55,250 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) 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 15:28:55,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:28:55,299 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-11-22 15:28:55,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:28:55,300 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) 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 27 [2021-11-22 15:28:55,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:28:55,303 INFO L225 Difference]: With dead ends: 57 [2021-11-22 15:28:55,303 INFO L226 Difference]: Without dead ends: 34 [2021-11-22 15:28:55,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:28:55,310 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:28:55,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 71 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:28:55,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-22 15:28:55,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-11-22 15:28:55,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:28:55,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-11-22 15:28:55,322 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2021-11-22 15:28:55,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:28:55,322 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-11-22 15:28:55,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) 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 15:28:55,325 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-11-22 15:28:55,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-22 15:28:55,327 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:28:55,330 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:28:55,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 15:28:55,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:28:55,546 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:28:55,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:28:55,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1267081640, now seen corresponding path program 2 times [2021-11-22 15:28:55,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:28:55,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222248870] [2021-11-22 15:28:55,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:28:55,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:28:55,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:28:55,605 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-22 15:28:55,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:28:55,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222248870] [2021-11-22 15:28:55,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222248870] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:28:55,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084801609] [2021-11-22 15:28:55,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:28:55,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:28:55,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:28:55,607 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:28:55,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 15:28:55,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 15:28:55,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:28:55,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 15:28:55,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:28:55,813 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 15:28:55,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:28:55,981 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 15:28:55,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084801609] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:28:55,981 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:28:55,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2021-11-22 15:28:55,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817801357] [2021-11-22 15:28:55,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:28:55,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-22 15:28:55,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:28:55,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-22 15:28:55,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-11-22 15:28:55,987 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 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 15:28:56,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:28:56,113 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2021-11-22 15:28:56,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-22 15:28:56,115 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 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 33 [2021-11-22 15:28:56,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:28:56,119 INFO L225 Difference]: With dead ends: 78 [2021-11-22 15:28:56,119 INFO L226 Difference]: Without dead ends: 55 [2021-11-22 15:28:56,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-11-22 15:28:56,121 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 23 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:28:56,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 66 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:28:56,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-22 15:28:56,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2021-11-22 15:28:56,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 51 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:28:56,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2021-11-22 15:28:56,143 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 33 [2021-11-22 15:28:56,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:28:56,144 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2021-11-22 15:28:56,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 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 15:28:56,144 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2021-11-22 15:28:56,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-22 15:28:56,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:28:56,149 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:28:56,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-22 15:28:56,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:28:56,365 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:28:56,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:28:56,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1849229898, now seen corresponding path program 3 times [2021-11-22 15:28:56,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:28:56,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957340644] [2021-11-22 15:28:56,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:28:56,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:28:56,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:28:56,531 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-22 15:28:56,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:28:56,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957340644] [2021-11-22 15:28:56,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957340644] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:28:56,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821655563] [2021-11-22 15:28:56,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 15:28:56,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:28:56,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:28:56,533 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:28:56,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 15:28:56,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-22 15:28:56,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:28:56,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 15:28:56,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:28:56,705 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-22 15:28:56,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:28:56,802 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-22 15:28:56,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821655563] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:28:56,802 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:28:56,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-22 15:28:56,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039409351] [2021-11-22 15:28:56,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:28:56,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 15:28:56,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:28:56,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 15:28:56,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:28:56,807 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) 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 15:28:56,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:28:56,892 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2021-11-22 15:28:56,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:28:56,893 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) 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 51 [2021-11-22 15:28:56,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:28:56,896 INFO L225 Difference]: With dead ends: 69 [2021-11-22 15:28:56,896 INFO L226 Difference]: Without dead ends: 58 [2021-11-22 15:28:56,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:28:56,898 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 4 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:28:56,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 113 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:28:56,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-22 15:28:56,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-11-22 15:28:56,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.087719298245614) internal successors, (62), 57 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:28:56,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2021-11-22 15:28:56,931 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 51 [2021-11-22 15:28:56,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:28:56,933 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2021-11-22 15:28:56,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) 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 15:28:56,948 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2021-11-22 15:28:56,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-22 15:28:56,949 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:28:56,949 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:28:56,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-22 15:28:57,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-22 15:28:57,162 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:28:57,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:28:57,162 INFO L85 PathProgramCache]: Analyzing trace with hash -790181948, now seen corresponding path program 4 times [2021-11-22 15:28:57,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:28:57,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870406084] [2021-11-22 15:28:57,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:28:57,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:28:57,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:28:57,250 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-22 15:28:57,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:28:57,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870406084] [2021-11-22 15:28:57,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870406084] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:28:57,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940458095] [2021-11-22 15:28:57,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 15:28:57,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:28:57,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:28:57,269 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:28:57,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-22 15:28:57,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 15:28:57,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:28:57,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 15:28:57,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:28:57,460 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-22 15:28:57,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:28:57,583 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-22 15:28:57,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940458095] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:28:57,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:28:57,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-11-22 15:28:57,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130180386] [2021-11-22 15:28:57,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:28:57,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 15:28:57,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:28:57,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 15:28:57,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-22 15:28:57,587 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 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 15:28:57,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:28:57,696 INFO L93 Difference]: Finished difference Result 111 states and 129 transitions. [2021-11-22 15:28:57,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 15:28:57,697 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 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 57 [2021-11-22 15:28:57,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:28:57,699 INFO L225 Difference]: With dead ends: 111 [2021-11-22 15:28:57,699 INFO L226 Difference]: Without dead ends: 82 [2021-11-22 15:28:57,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-22 15:28:57,700 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 28 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:28:57,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 51 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:28:57,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-22 15:28:57,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-11-22 15:28:57,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0617283950617284) internal successors, (86), 81 states have internal predecessors, (86), 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 15:28:57,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2021-11-22 15:28:57,710 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 57 [2021-11-22 15:28:57,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:28:57,711 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2021-11-22 15:28:57,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 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 15:28:57,711 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2021-11-22 15:28:57,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-22 15:28:57,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:28:57,713 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:28:57,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-22 15:28:57,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-22 15:28:57,926 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:28:57,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:28:57,927 INFO L85 PathProgramCache]: Analyzing trace with hash 459280572, now seen corresponding path program 5 times [2021-11-22 15:28:57,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:28:57,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947856425] [2021-11-22 15:28:57,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:28:57,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:28:57,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:28:58,095 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-22 15:28:58,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:28:58,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947856425] [2021-11-22 15:28:58,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947856425] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:28:58,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308271517] [2021-11-22 15:28:58,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 15:28:58,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:28:58,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:28:58,102 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:28:58,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-22 15:28:58,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-11-22 15:28:58,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:28:58,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-22 15:28:58,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:28:58,677 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2021-11-22 15:28:58,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:28:58,977 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2021-11-22 15:28:58,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308271517] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:28:58,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:28:58,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 27 [2021-11-22 15:28:58,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087626674] [2021-11-22 15:28:58,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:28:58,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-22 15:28:58,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:28:58,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-22 15:28:58,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=505, Unknown=0, NotChecked=0, Total=702 [2021-11-22 15:28:58,980 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand has 27 states, 27 states have (on average 3.037037037037037) internal successors, (82), 27 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:28:59,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:28:59,237 INFO L93 Difference]: Finished difference Result 192 states and 224 transitions. [2021-11-22 15:28:59,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-22 15:28:59,237 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.037037037037037) internal successors, (82), 27 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-22 15:28:59,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:28:59,239 INFO L225 Difference]: With dead ends: 192 [2021-11-22 15:28:59,239 INFO L226 Difference]: Without dead ends: 133 [2021-11-22 15:28:59,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=197, Invalid=505, Unknown=0, NotChecked=0, Total=702 [2021-11-22 15:28:59,241 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 71 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 15:28:59,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 131 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 15:28:59,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-22 15:28:59,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2021-11-22 15:28:59,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.0381679389312977) internal successors, (136), 131 states have internal predecessors, (136), 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 15:28:59,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2021-11-22 15:28:59,254 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 81 [2021-11-22 15:28:59,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:28:59,254 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2021-11-22 15:28:59,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.037037037037037) internal successors, (82), 27 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:28:59,255 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2021-11-22 15:28:59,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-22 15:28:59,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:28:59,257 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 11, 11, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:28:59,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-22 15:28:59,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:28:59,485 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:28:59,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:28:59,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1420700182, now seen corresponding path program 6 times [2021-11-22 15:28:59,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:28:59,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201237420] [2021-11-22 15:28:59,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:28:59,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:28:59,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:28:59,706 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 604 trivial. 0 not checked. [2021-11-22 15:28:59,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:28:59,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201237420] [2021-11-22 15:28:59,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201237420] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:28:59,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624385680] [2021-11-22 15:28:59,707 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 15:28:59,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:28:59,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:28:59,709 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:28:59,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-22 15:28:59,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-22 15:28:59,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:28:59,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 15:28:59,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:29:00,278 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 709 trivial. 0 not checked. [2021-11-22 15:29:00,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:29:00,565 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 709 trivial. 0 not checked. [2021-11-22 15:29:00,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624385680] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:29:00,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:29:00,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 7] total 24 [2021-11-22 15:29:00,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107451301] [2021-11-22 15:29:00,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:29:00,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-22 15:29:00,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:29:00,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-22 15:29:00,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2021-11-22 15:29:00,574 INFO L87 Difference]: Start difference. First operand 132 states and 136 transitions. Second operand has 24 states, 24 states have (on average 3.375) internal successors, (81), 24 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:29:00,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:29:00,670 INFO L93 Difference]: Finished difference Result 254 states and 268 transitions. [2021-11-22 15:29:00,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-22 15:29:00,678 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.375) internal successors, (81), 24 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-22 15:29:00,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:29:00,682 INFO L225 Difference]: With dead ends: 254 [2021-11-22 15:29:00,682 INFO L226 Difference]: Without dead ends: 147 [2021-11-22 15:29:00,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2021-11-22 15:29:00,690 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 22 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:29:00,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 126 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:29:00,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-22 15:29:00,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2021-11-22 15:29:00,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.0344827586206897) internal successors, (150), 145 states have internal predecessors, (150), 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 15:29:00,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2021-11-22 15:29:00,719 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 131 [2021-11-22 15:29:00,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:29:00,720 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2021-11-22 15:29:00,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.375) internal successors, (81), 24 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:29:00,720 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2021-11-22 15:29:00,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-22 15:29:00,725 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:29:00,725 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:29:00,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-22 15:29:00,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:29:00,930 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:29:00,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:29:00,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1857475612, now seen corresponding path program 7 times [2021-11-22 15:29:00,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:29:00,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476817622] [2021-11-22 15:29:00,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:29:00,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:29:00,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:29:01,164 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-11-22 15:29:01,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:29:01,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476817622] [2021-11-22 15:29:01,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476817622] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:29:01,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570165829] [2021-11-22 15:29:01,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 15:29:01,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:29:01,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:29:01,166 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:29:01,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-22 15:29:01,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:29:01,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-22 15:29:01,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:29:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-11-22 15:29:01,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:29:01,955 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-11-22 15:29:01,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570165829] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:29:01,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:29:01,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2021-11-22 15:29:01,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834634733] [2021-11-22 15:29:01,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:29:01,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-22 15:29:01,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:29:01,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-22 15:29:01,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-11-22 15:29:01,958 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand has 29 states, 29 states have (on average 2.689655172413793) internal successors, (78), 29 states have internal predecessors, (78), 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 15:29:02,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:29:02,055 INFO L93 Difference]: Finished difference Result 293 states and 314 transitions. [2021-11-22 15:29:02,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-22 15:29:02,055 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.689655172413793) internal successors, (78), 29 states have internal predecessors, (78), 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 145 [2021-11-22 15:29:02,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:29:02,057 INFO L225 Difference]: With dead ends: 293 [2021-11-22 15:29:02,057 INFO L226 Difference]: Without dead ends: 174 [2021-11-22 15:29:02,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-11-22 15:29:02,059 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 39 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:29:02,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 117 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:29:02,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-22 15:29:02,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2021-11-22 15:29:02,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.0289017341040463) internal successors, (178), 173 states have internal predecessors, (178), 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 15:29:02,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 178 transitions. [2021-11-22 15:29:02,072 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 178 transitions. Word has length 145 [2021-11-22 15:29:02,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:29:02,072 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 178 transitions. [2021-11-22 15:29:02,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.689655172413793) internal successors, (78), 29 states have internal predecessors, (78), 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 15:29:02,073 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 178 transitions. [2021-11-22 15:29:02,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-22 15:29:02,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:29:02,075 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 14, 14, 14, 14, 14, 14, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:29:02,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-22 15:29:02,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:29:02,295 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:29:02,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:29:02,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1542409984, now seen corresponding path program 8 times [2021-11-22 15:29:02,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:29:02,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244038150] [2021-11-22 15:29:02,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:29:02,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:29:02,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:29:02,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1364 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-11-22 15:29:02,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:29:02,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244038150] [2021-11-22 15:29:02,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244038150] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:29:02,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843395328] [2021-11-22 15:29:02,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:29:02,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:29:02,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:29:02,813 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:29:02,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-22 15:29:02,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 15:29:02,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:29:02,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-22 15:29:02,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:29:03,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1364 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-11-22 15:29:03,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:29:04,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1364 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-11-22 15:29:04,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843395328] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:29:04,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:29:04,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 57 [2021-11-22 15:29:04,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837016803] [2021-11-22 15:29:04,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:29:04,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-22 15:29:04,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:29:04,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-22 15:29:04,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-11-22 15:29:04,475 INFO L87 Difference]: Start difference. First operand 174 states and 178 transitions. Second operand has 57 states, 57 states have (on average 2.3508771929824563) internal successors, (134), 57 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:29:04,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:29:04,677 INFO L93 Difference]: Finished difference Result 349 states and 384 transitions. [2021-11-22 15:29:04,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-22 15:29:04,678 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.3508771929824563) internal successors, (134), 57 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2021-11-22 15:29:04,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:29:04,680 INFO L225 Difference]: With dead ends: 349 [2021-11-22 15:29:04,680 INFO L226 Difference]: Without dead ends: 230 [2021-11-22 15:29:04,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-11-22 15:29:04,684 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 81 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:29:04,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 140 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:29:04,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-11-22 15:29:04,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2021-11-22 15:29:04,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.0218340611353711) internal successors, (234), 229 states have internal predecessors, (234), 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 15:29:04,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 234 transitions. [2021-11-22 15:29:04,698 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 234 transitions. Word has length 173 [2021-11-22 15:29:04,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:29:04,698 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 234 transitions. [2021-11-22 15:29:04,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.3508771929824563) internal successors, (134), 57 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:29:04,699 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 234 transitions. [2021-11-22 15:29:04,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-11-22 15:29:04,702 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:29:04,702 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 14, 14, 14, 14, 14, 14, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:29:04,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-22 15:29:04,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:29:04,929 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:29:04,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:29:04,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1936799032, now seen corresponding path program 9 times [2021-11-22 15:29:04,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:29:04,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368429262] [2021-11-22 15:29:04,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:29:04,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:29:05,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:29:06,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3604 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-11-22 15:29:06,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:29:06,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368429262] [2021-11-22 15:29:06,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368429262] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:29:06,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348513829] [2021-11-22 15:29:06,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 15:29:06,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:29:06,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:29:06,539 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:29:06,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-22 15:29:07,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-22 15:29:07,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:29:07,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-22 15:29:07,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:29:08,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3604 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 3504 trivial. 0 not checked. [2021-11-22 15:29:08,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:29:09,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3604 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 3504 trivial. 0 not checked. [2021-11-22 15:29:09,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348513829] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:29:09,154 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:29:09,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 13, 13] total 79 [2021-11-22 15:29:09,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987682146] [2021-11-22 15:29:09,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:29:09,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-22 15:29:09,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:29:09,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-22 15:29:09,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1871, Invalid=4291, Unknown=0, NotChecked=0, Total=6162 [2021-11-22 15:29:09,160 INFO L87 Difference]: Start difference. First operand 230 states and 234 transitions. Second operand has 79 states, 79 states have (on average 2.4177215189873418) internal successors, (191), 79 states have internal predecessors, (191), 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 15:29:09,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:29:09,439 INFO L93 Difference]: Finished difference Result 376 states and 396 transitions. [2021-11-22 15:29:09,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-11-22 15:29:09,440 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.4177215189873418) internal successors, (191), 79 states have internal predecessors, (191), 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 229 [2021-11-22 15:29:09,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:29:09,444 INFO L225 Difference]: With dead ends: 376 [2021-11-22 15:29:09,444 INFO L226 Difference]: Without dead ends: 257 [2021-11-22 15:29:09,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1871, Invalid=4291, Unknown=0, NotChecked=0, Total=6162 [2021-11-22 15:29:09,449 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 77 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 15:29:09,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 186 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 15:29:09,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-11-22 15:29:09,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 256. [2021-11-22 15:29:09,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.0196078431372548) internal successors, (260), 255 states have internal predecessors, (260), 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 15:29:09,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 260 transitions. [2021-11-22 15:29:09,464 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 260 transitions. Word has length 229 [2021-11-22 15:29:09,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:29:09,465 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 260 transitions. [2021-11-22 15:29:09,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.4177215189873418) internal successors, (191), 79 states have internal predecessors, (191), 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 15:29:09,466 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 260 transitions. [2021-11-22 15:29:09,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-22 15:29:09,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:29:09,471 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 22, 22, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:29:09,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-22 15:29:09,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-22 15:29:09,685 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:29:09,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:29:09,685 INFO L85 PathProgramCache]: Analyzing trace with hash -541914130, now seen corresponding path program 10 times [2021-11-22 15:29:09,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:29:09,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106115296] [2021-11-22 15:29:09,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:29:09,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:29:09,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:29:11,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4097 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2021-11-22 15:29:11,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:29:11,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106115296] [2021-11-22 15:29:11,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106115296] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:29:11,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133315787] [2021-11-22 15:29:11,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 15:29:11,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:29:11,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:29:11,257 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:29:11,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-22 15:29:11,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 15:29:11,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:29:11,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-22 15:29:11,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:29:11,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4097 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2021-11-22 15:29:11,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:29:15,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4097 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2021-11-22 15:29:15,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133315787] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:29:15,514 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:29:15,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 115 [2021-11-22 15:29:15,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033293630] [2021-11-22 15:29:15,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:29:15,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2021-11-22 15:29:15,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:29:15,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2021-11-22 15:29:15,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2021-11-22 15:29:15,524 INFO L87 Difference]: Start difference. First operand 256 states and 260 transitions. Second operand has 115 states, 115 states have (on average 2.1739130434782608) internal successors, (250), 115 states have internal predecessors, (250), 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 15:29:15,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:29:15,984 INFO L93 Difference]: Finished difference Result 513 states and 577 transitions. [2021-11-22 15:29:15,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-11-22 15:29:15,994 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.1739130434782608) internal successors, (250), 115 states have internal predecessors, (250), 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 255 [2021-11-22 15:29:15,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:29:15,998 INFO L225 Difference]: With dead ends: 513 [2021-11-22 15:29:15,998 INFO L226 Difference]: Without dead ends: 370 [2021-11-22 15:29:16,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2021-11-22 15:29:16,005 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 112 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 15:29:16,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 163 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 15:29:16,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-11-22 15:29:16,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 370. [2021-11-22 15:29:16,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 1.013550135501355) internal successors, (374), 369 states have internal predecessors, (374), 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 15:29:16,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 374 transitions. [2021-11-22 15:29:16,019 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 374 transitions. Word has length 255 [2021-11-22 15:29:16,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:29:16,019 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 374 transitions. [2021-11-22 15:29:16,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.1739130434782608) internal successors, (250), 115 states have internal predecessors, (250), 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 15:29:16,020 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 374 transitions. [2021-11-22 15:29:16,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2021-11-22 15:29:16,027 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:29:16,027 INFO L514 BasicCegarLoop]: trace histogram [112, 112, 22, 22, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:29:16,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-22 15:29:16,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-22 15:29:16,245 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:29:16,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:29:16,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1296472516, now seen corresponding path program 11 times [2021-11-22 15:29:16,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:29:16,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980169584] [2021-11-22 15:29:16,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:29:16,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:29:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:29:21,226 INFO L134 CoverageAnalysis]: Checked inductivity of 13616 backedges. 0 proven. 12544 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2021-11-22 15:29:21,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:29:21,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980169584] [2021-11-22 15:29:21,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980169584] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:29:21,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284331071] [2021-11-22 15:29:21,226 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 15:29:21,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:29:21,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:29:21,227 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:29:21,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_835e9555-22d7-4747-8d2a-df3a03ab6826/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process