./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-longest-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longest-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt --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 37b183961076d6fcb23260763ff12b2e8c94306b ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-12 23:59:04,611 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-12 23:59:04,614 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-12 23:59:04,654 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-12 23:59:04,657 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-12 23:59:04,661 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-12 23:59:04,664 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-12 23:59:04,668 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-12 23:59:04,671 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-12 23:59:04,679 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-12 23:59:04,680 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-12 23:59:04,682 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-12 23:59:04,684 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-12 23:59:04,686 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-12 23:59:04,688 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-12 23:59:04,691 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-12 23:59:04,695 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-12 23:59:04,697 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-12 23:59:04,699 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-12 23:59:04,704 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-12 23:59:04,711 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-12 23:59:04,713 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-12 23:59:04,714 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-12 23:59:04,715 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-12 23:59:04,724 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-12 23:59:04,725 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-12 23:59:04,725 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-12 23:59:04,727 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-12 23:59:04,728 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-12 23:59:04,730 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-12 23:59:04,731 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-12 23:59:04,732 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-12 23:59:04,734 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-12 23:59:04,735 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-12 23:59:04,737 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-12 23:59:04,738 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-12 23:59:04,738 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-12 23:59:04,739 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-12 23:59:04,739 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-12 23:59:04,740 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-12 23:59:04,741 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-12 23:59:04,742 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-12 23:59:04,792 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-12 23:59:04,792 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-12 23:59:04,793 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-12 23:59:04,793 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-12 23:59:04,800 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-12 23:59:04,801 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-12 23:59:04,801 INFO L138 SettingsManager]: * Use SBE=true [2021-10-12 23:59:04,802 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-12 23:59:04,802 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-12 23:59:04,802 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-12 23:59:04,803 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-12 23:59:04,803 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-12 23:59:04,804 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-12 23:59:04,804 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-12 23:59:04,804 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-12 23:59:04,804 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-12 23:59:04,804 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-12 23:59:04,805 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-12 23:59:04,805 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-12 23:59:04,805 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-12 23:59:04,805 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-12 23:59:04,806 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-12 23:59:04,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-12 23:59:04,806 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-12 23:59:04,806 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-12 23:59:04,806 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-12 23:59:04,807 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-12 23:59:04,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-12 23:59:04,807 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-12 23:59:04,809 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-12 23:59:04,809 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_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37b183961076d6fcb23260763ff12b2e8c94306b [2021-10-12 23:59:05,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-12 23:59:05,204 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-12 23:59:05,207 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-12 23:59:05,208 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-12 23:59:05,209 INFO L275 PluginConnector]: CDTParser initialized [2021-10-12 23:59:05,210 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/pthread/triangular-longest-1.i [2021-10-12 23:59:05,276 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/data/5dcb93759/99d0dbfa06ca4ca8851e87b018b57fd2/FLAGff3968955 [2021-10-12 23:59:05,756 INFO L306 CDTParser]: Found 1 translation units. [2021-10-12 23:59:05,756 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/sv-benchmarks/c/pthread/triangular-longest-1.i [2021-10-12 23:59:05,780 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/data/5dcb93759/99d0dbfa06ca4ca8851e87b018b57fd2/FLAGff3968955 [2021-10-12 23:59:06,073 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/data/5dcb93759/99d0dbfa06ca4ca8851e87b018b57fd2 [2021-10-12 23:59:06,075 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-12 23:59:06,077 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-12 23:59:06,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-12 23:59:06,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-12 23:59:06,084 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-12 23:59:06,084 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 11:59:06" (1/1) ... [2021-10-12 23:59:06,086 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14018732 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:06, skipping insertion in model container [2021-10-12 23:59:06,086 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 11:59:06" (1/1) ... [2021-10-12 23:59:06,093 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-12 23:59:06,130 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-12 23:59:06,478 WARN L228 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_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/sv-benchmarks/c/pthread/triangular-longest-1.i[30962,30975] [2021-10-12 23:59:06,482 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-12 23:59:06,490 INFO L203 MainTranslator]: Completed pre-run [2021-10-12 23:59:06,529 WARN L228 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_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/sv-benchmarks/c/pthread/triangular-longest-1.i[30962,30975] [2021-10-12 23:59:06,530 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-12 23:59:06,570 INFO L208 MainTranslator]: Completed translation [2021-10-12 23:59:06,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:06 WrapperNode [2021-10-12 23:59:06,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-12 23:59:06,572 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-12 23:59:06,572 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-12 23:59:06,572 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-12 23:59:06,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:06" (1/1) ... [2021-10-12 23:59:06,593 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:06" (1/1) ... [2021-10-12 23:59:06,613 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-12 23:59:06,614 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-12 23:59:06,614 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-12 23:59:06,615 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-12 23:59:06,622 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:06" (1/1) ... [2021-10-12 23:59:06,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:06" (1/1) ... [2021-10-12 23:59:06,626 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:06" (1/1) ... [2021-10-12 23:59:06,626 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:06" (1/1) ... [2021-10-12 23:59:06,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:06" (1/1) ... [2021-10-12 23:59:06,635 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:06" (1/1) ... [2021-10-12 23:59:06,637 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:06" (1/1) ... [2021-10-12 23:59:06,640 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-12 23:59:06,641 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-12 23:59:06,641 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-12 23:59:06,641 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-12 23:59:06,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:06" (1/1) ... [2021-10-12 23:59:06,663 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-12 23:59:06,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:06,694 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:06,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-12 23:59:06,751 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-10-12 23:59:06,752 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-10-12 23:59:06,753 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-10-12 23:59:06,753 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-10-12 23:59:06,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-12 23:59:06,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-12 23:59:06,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-12 23:59:06,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-12 23:59:06,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-12 23:59:06,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-12 23:59:06,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-12 23:59:06,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-12 23:59:06,756 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-12 23:59:07,087 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-12 23:59:07,088 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-12 23:59:07,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 11:59:07 BoogieIcfgContainer [2021-10-12 23:59:07,090 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-12 23:59:07,092 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-12 23:59:07,093 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-12 23:59:07,096 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-12 23:59:07,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 11:59:06" (1/3) ... [2021-10-12 23:59:07,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@794bd175 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 11:59:07, skipping insertion in model container [2021-10-12 23:59:07,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:06" (2/3) ... [2021-10-12 23:59:07,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@794bd175 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 11:59:07, skipping insertion in model container [2021-10-12 23:59:07,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 11:59:07" (3/3) ... [2021-10-12 23:59:07,100 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2021-10-12 23:59:07,106 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-12 23:59:07,106 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-12 23:59:07,106 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-12 23:59:07,106 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-12 23:59:07,144 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,145 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,145 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,145 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,145 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,146 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,146 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,146 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,146 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,146 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,147 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,147 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,147 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,148 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,148 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,148 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,148 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,148 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,149 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,149 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,149 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,149 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,150 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,150 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,150 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,150 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,150 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,151 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,151 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,151 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,151 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,152 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,152 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,152 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,152 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,152 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,153 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,153 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,153 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,153 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,154 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,154 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,154 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,154 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,155 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,155 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,155 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,155 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,155 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,156 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,156 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,157 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,158 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,158 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,160 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,160 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,167 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,167 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,167 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,167 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,168 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,168 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,177 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,178 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,178 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,178 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,179 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,179 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-12 23:59:07,183 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-10-12 23:59:07,240 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-12 23:59:07,249 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-10-12 23:59:07,249 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-12 23:59:07,279 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-12 23:59:07,291 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 66 transitions, 142 flow [2021-10-12 23:59:07,295 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 66 transitions, 142 flow [2021-10-12 23:59:07,296 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 68 places, 66 transitions, 142 flow [2021-10-12 23:59:07,353 INFO L129 PetriNetUnfolder]: 5/64 cut-off events. [2021-10-12 23:59:07,353 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-12 23:59:07,361 INFO L84 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 5/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 65 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2021-10-12 23:59:07,364 INFO L116 LiptonReduction]: Number of co-enabled transitions 1078 [2021-10-12 23:59:10,767 INFO L131 LiptonReduction]: Checked pairs total: 1010 [2021-10-12 23:59:10,767 INFO L133 LiptonReduction]: Total number of compositions: 58 [2021-10-12 23:59:10,778 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2021-10-12 23:59:10,791 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 34 states have (on average 2.5294117647058822) internal successors, (86), 34 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) [2021-10-12 23:59:10,794 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 34 states have (on average 2.5294117647058822) internal successors, (86), 34 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) [2021-10-12 23:59:10,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-12 23:59:10,803 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:10,803 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-12 23:59:10,804 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-12 23:59:10,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:10,808 INFO L82 PathProgramCache]: Analyzing trace with hash -776411381, now seen corresponding path program 1 times [2021-10-12 23:59:10,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:10,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96010883] [2021-10-12 23:59:10,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:10,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:10,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:11,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:11,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:11,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96010883] [2021-10-12 23:59:11,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96010883] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:11,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:11,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-12 23:59:11,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451871478] [2021-10-12 23:59:11,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-12 23:59:11,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:11,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-12 23:59:11,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-12 23:59:11,155 INFO L87 Difference]: Start difference. First operand has 35 states, 34 states have (on average 2.5294117647058822) internal successors, (86), 34 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) Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:11,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:11,202 INFO L93 Difference]: Finished difference Result 44 states and 107 transitions. [2021-10-12 23:59:11,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-12 23:59:11,203 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-12 23:59:11,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:11,213 INFO L225 Difference]: With dead ends: 44 [2021-10-12 23:59:11,213 INFO L226 Difference]: Without dead ends: 38 [2021-10-12 23:59:11,214 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-12 23:59:11,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-12 23:59:11,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-10-12 23:59:11,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 37 states have internal predecessors, (92), 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) [2021-10-12 23:59:11,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2021-10-12 23:59:11,249 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 6 [2021-10-12 23:59:11,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:11,249 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2021-10-12 23:59:11,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:11,250 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2021-10-12 23:59:11,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-12 23:59:11,251 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:11,251 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:11,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-12 23:59:11,252 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-12 23:59:11,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:11,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1192430633, now seen corresponding path program 1 times [2021-10-12 23:59:11,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:11,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107805455] [2021-10-12 23:59:11,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:11,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:11,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:11,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:11,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:11,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107805455] [2021-10-12 23:59:11,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107805455] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:11,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:11,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-12 23:59:11,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129433060] [2021-10-12 23:59:11,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-12 23:59:11,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:11,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-12 23:59:11,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-12 23:59:11,409 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:11,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:11,482 INFO L93 Difference]: Finished difference Result 64 states and 150 transitions. [2021-10-12 23:59:11,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-12 23:59:11,483 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-12 23:59:11,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:11,485 INFO L225 Difference]: With dead ends: 64 [2021-10-12 23:59:11,485 INFO L226 Difference]: Without dead ends: 50 [2021-10-12 23:59:11,485 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-12 23:59:11,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-12 23:59:11,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-10-12 23:59:11,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.4390243902439024) internal successors, (100), 41 states have internal predecessors, (100), 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) [2021-10-12 23:59:11,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2021-10-12 23:59:11,498 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2021-10-12 23:59:11,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:11,498 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2021-10-12 23:59:11,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:11,499 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2021-10-12 23:59:11,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-12 23:59:11,500 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:11,500 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:11,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-12 23:59:11,500 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-12 23:59:11,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:11,503 INFO L82 PathProgramCache]: Analyzing trace with hash -830913789, now seen corresponding path program 1 times [2021-10-12 23:59:11,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:11,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793094090] [2021-10-12 23:59:11,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:11,505 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:11,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:11,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:11,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:11,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793094090] [2021-10-12 23:59:11,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793094090] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:11,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:11,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-12 23:59:11,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142044872] [2021-10-12 23:59:11,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-12 23:59:11,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:11,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-12 23:59:11,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-12 23:59:11,609 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:11,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:11,766 INFO L93 Difference]: Finished difference Result 58 states and 136 transitions. [2021-10-12 23:59:11,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-12 23:59:11,767 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-12 23:59:11,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:11,772 INFO L225 Difference]: With dead ends: 58 [2021-10-12 23:59:11,772 INFO L226 Difference]: Without dead ends: 52 [2021-10-12 23:59:11,773 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 95.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-12 23:59:11,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-12 23:59:11,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 38. [2021-10-12 23:59:11,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.4324324324324325) internal successors, (90), 37 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:11,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 90 transitions. [2021-10-12 23:59:11,793 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 90 transitions. Word has length 10 [2021-10-12 23:59:11,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:11,794 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 90 transitions. [2021-10-12 23:59:11,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:11,795 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 90 transitions. [2021-10-12 23:59:11,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-12 23:59:11,797 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:11,797 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:11,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-12 23:59:11,798 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-12 23:59:11,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:11,799 INFO L82 PathProgramCache]: Analyzing trace with hash -855995889, now seen corresponding path program 2 times [2021-10-12 23:59:11,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:11,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999830579] [2021-10-12 23:59:11,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:11,800 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:11,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:11,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:11,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:11,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999830579] [2021-10-12 23:59:11,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999830579] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:11,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:11,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-12 23:59:11,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349659592] [2021-10-12 23:59:11,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-12 23:59:11,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:11,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-12 23:59:11,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-12 23:59:11,945 INFO L87 Difference]: Start difference. First operand 38 states and 90 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:12,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:12,029 INFO L93 Difference]: Finished difference Result 60 states and 142 transitions. [2021-10-12 23:59:12,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-12 23:59:12,029 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-12 23:59:12,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:12,030 INFO L225 Difference]: With dead ends: 60 [2021-10-12 23:59:12,030 INFO L226 Difference]: Without dead ends: 47 [2021-10-12 23:59:12,031 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 50.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-10-12 23:59:12,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-12 23:59:12,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2021-10-12 23:59:12,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 39 states have internal predecessors, (97), 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) [2021-10-12 23:59:12,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2021-10-12 23:59:12,038 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2021-10-12 23:59:12,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:12,038 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2021-10-12 23:59:12,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:12,039 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2021-10-12 23:59:12,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-12 23:59:12,039 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:12,039 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:12,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-12 23:59:12,040 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-12 23:59:12,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:12,040 INFO L82 PathProgramCache]: Analyzing trace with hash 11487317, now seen corresponding path program 3 times [2021-10-12 23:59:12,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:12,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913364336] [2021-10-12 23:59:12,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:12,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:12,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:12,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:12,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:12,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913364336] [2021-10-12 23:59:12,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913364336] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:12,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332484079] [2021-10-12 23:59:12,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-12 23:59:12,164 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:12,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:12,173 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:12,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-12 23:59:12,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-12 23:59:12,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:12,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-12 23:59:12,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:12,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:12,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332484079] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:12,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:12,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-10-12 23:59:12,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129274344] [2021-10-12 23:59:12,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-12 23:59:12,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:12,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-12 23:59:12,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-12 23:59:12,353 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:12,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:12,574 INFO L93 Difference]: Finished difference Result 71 states and 167 transitions. [2021-10-12 23:59:12,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-12 23:59:12,574 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-12 23:59:12,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:12,577 INFO L225 Difference]: With dead ends: 71 [2021-10-12 23:59:12,577 INFO L226 Difference]: Without dead ends: 57 [2021-10-12 23:59:12,577 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 161.4ms TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2021-10-12 23:59:12,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-12 23:59:12,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2021-10-12 23:59:12,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.511627906976744) internal successors, (108), 43 states have internal predecessors, (108), 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) [2021-10-12 23:59:12,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 108 transitions. [2021-10-12 23:59:12,596 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 108 transitions. Word has length 11 [2021-10-12 23:59:12,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:12,596 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 108 transitions. [2021-10-12 23:59:12,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:12,597 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 108 transitions. [2021-10-12 23:59:12,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-12 23:59:12,598 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:12,598 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:12,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:12,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:12,825 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-12 23:59:12,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:12,825 INFO L82 PathProgramCache]: Analyzing trace with hash -766059705, now seen corresponding path program 4 times [2021-10-12 23:59:12,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:12,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508657893] [2021-10-12 23:59:12,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:12,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:12,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:12,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:12,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:12,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508657893] [2021-10-12 23:59:12,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508657893] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:12,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262311168] [2021-10-12 23:59:12,942 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-12 23:59:12,943 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:12,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:12,948 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:12,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-12 23:59:13,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-12 23:59:13,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:13,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-12 23:59:13,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:13,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:13,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262311168] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:13,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:13,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-10-12 23:59:13,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416237556] [2021-10-12 23:59:13,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-12 23:59:13,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:13,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-12 23:59:13,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-12 23:59:13,173 INFO L87 Difference]: Start difference. First operand 44 states and 108 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:13,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:13,292 INFO L93 Difference]: Finished difference Result 76 states and 180 transitions. [2021-10-12 23:59:13,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-12 23:59:13,294 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-12 23:59:13,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:13,296 INFO L225 Difference]: With dead ends: 76 [2021-10-12 23:59:13,296 INFO L226 Difference]: Without dead ends: 66 [2021-10-12 23:59:13,297 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-10-12 23:59:13,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-12 23:59:13,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 52. [2021-10-12 23:59:13,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.450980392156863) internal successors, (125), 51 states have internal predecessors, (125), 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) [2021-10-12 23:59:13,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 125 transitions. [2021-10-12 23:59:13,313 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 125 transitions. Word has length 11 [2021-10-12 23:59:13,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:13,314 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 125 transitions. [2021-10-12 23:59:13,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:13,314 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 125 transitions. [2021-10-12 23:59:13,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-12 23:59:13,315 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:13,315 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:13,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:13,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:13,538 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-12 23:59:13,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:13,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1845299755, now seen corresponding path program 5 times [2021-10-12 23:59:13,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:13,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572584914] [2021-10-12 23:59:13,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:13,539 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:13,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:13,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-12 23:59:13,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:13,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572584914] [2021-10-12 23:59:13,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572584914] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:13,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826357863] [2021-10-12 23:59:13,654 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-12 23:59:13,654 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:13,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:13,655 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:13,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-12 23:59:13,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-12 23:59:13,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:13,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-12 23:59:13,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:13,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-12 23:59:13,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826357863] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:13,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:13,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-10-12 23:59:13,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572867925] [2021-10-12 23:59:13,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-12 23:59:13,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:13,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-12 23:59:13,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-12 23:59:13,865 INFO L87 Difference]: Start difference. First operand 52 states and 125 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 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) [2021-10-12 23:59:14,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:14,072 INFO L93 Difference]: Finished difference Result 81 states and 194 transitions. [2021-10-12 23:59:14,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-12 23:59:14,073 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 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 13 [2021-10-12 23:59:14,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:14,074 INFO L225 Difference]: With dead ends: 81 [2021-10-12 23:59:14,074 INFO L226 Difference]: Without dead ends: 70 [2021-10-12 23:59:14,076 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 167.1ms TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2021-10-12 23:59:14,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-12 23:59:14,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 43. [2021-10-12 23:59:14,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.4523809523809526) internal successors, (103), 42 states have internal predecessors, (103), 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) [2021-10-12 23:59:14,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 103 transitions. [2021-10-12 23:59:14,091 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 103 transitions. Word has length 13 [2021-10-12 23:59:14,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:14,091 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 103 transitions. [2021-10-12 23:59:14,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 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) [2021-10-12 23:59:14,092 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 103 transitions. [2021-10-12 23:59:14,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-12 23:59:14,098 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:14,098 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:14,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:14,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:14,325 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-12 23:59:14,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:14,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1743618811, now seen corresponding path program 6 times [2021-10-12 23:59:14,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:14,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58962918] [2021-10-12 23:59:14,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:14,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:14,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:14,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:14,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:14,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58962918] [2021-10-12 23:59:14,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58962918] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:14,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450375819] [2021-10-12 23:59:14,439 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-12 23:59:14,439 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:14,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:14,440 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:14,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-12 23:59:14,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-12 23:59:14,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:14,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-12 23:59:14,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:14,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:14,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450375819] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:14,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:14,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-10-12 23:59:14,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793352740] [2021-10-12 23:59:14,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-12 23:59:14,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:14,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-12 23:59:14,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-12 23:59:14,723 INFO L87 Difference]: Start difference. First operand 43 states and 103 transitions. Second operand has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 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) [2021-10-12 23:59:14,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:14,936 INFO L93 Difference]: Finished difference Result 92 states and 221 transitions. [2021-10-12 23:59:14,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-12 23:59:14,937 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 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 13 [2021-10-12 23:59:14,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:14,939 INFO L225 Difference]: With dead ends: 92 [2021-10-12 23:59:14,939 INFO L226 Difference]: Without dead ends: 72 [2021-10-12 23:59:14,939 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 225.1ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-10-12 23:59:14,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-12 23:59:14,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 43. [2021-10-12 23:59:14,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.4761904761904763) internal successors, (104), 42 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:14,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 104 transitions. [2021-10-12 23:59:14,949 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 104 transitions. Word has length 13 [2021-10-12 23:59:14,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:14,950 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 104 transitions. [2021-10-12 23:59:14,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 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) [2021-10-12 23:59:14,950 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 104 transitions. [2021-10-12 23:59:14,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-12 23:59:14,951 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:14,951 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:14,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:15,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:15,177 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-12 23:59:15,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:15,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1369648897, now seen corresponding path program 7 times [2021-10-12 23:59:15,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:15,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287998044] [2021-10-12 23:59:15,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:15,178 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:15,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:15,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:15,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:15,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287998044] [2021-10-12 23:59:15,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287998044] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:15,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58693130] [2021-10-12 23:59:15,342 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-12 23:59:15,342 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:15,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:15,343 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:15,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-12 23:59:15,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:15,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-12 23:59:15,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:15,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:15,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58693130] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:15,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:15,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-10-12 23:59:15,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636837901] [2021-10-12 23:59:15,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-12 23:59:15,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:15,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-12 23:59:15,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-10-12 23:59:15,576 INFO L87 Difference]: Start difference. First operand 43 states and 104 transitions. Second operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 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) [2021-10-12 23:59:15,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:15,882 INFO L93 Difference]: Finished difference Result 98 states and 236 transitions. [2021-10-12 23:59:15,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-12 23:59:15,882 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 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 14 [2021-10-12 23:59:15,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:15,883 INFO L225 Difference]: With dead ends: 98 [2021-10-12 23:59:15,884 INFO L226 Difference]: Without dead ends: 78 [2021-10-12 23:59:15,885 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 284.2ms TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2021-10-12 23:59:15,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-12 23:59:15,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 47. [2021-10-12 23:59:15,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.4565217391304346) internal successors, (113), 46 states have internal predecessors, (113), 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) [2021-10-12 23:59:15,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 113 transitions. [2021-10-12 23:59:15,891 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 113 transitions. Word has length 14 [2021-10-12 23:59:15,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:15,891 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 113 transitions. [2021-10-12 23:59:15,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 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) [2021-10-12 23:59:15,891 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 113 transitions. [2021-10-12 23:59:15,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-12 23:59:15,892 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:15,892 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:15,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:16,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-12 23:59:16,101 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-12 23:59:16,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:16,101 INFO L82 PathProgramCache]: Analyzing trace with hash -580081853, now seen corresponding path program 8 times [2021-10-12 23:59:16,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:16,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115238641] [2021-10-12 23:59:16,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:16,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:16,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:16,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:16,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:16,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115238641] [2021-10-12 23:59:16,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115238641] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:16,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127387792] [2021-10-12 23:59:16,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-12 23:59:16,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:16,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:16,214 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:16,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-12 23:59:16,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-12 23:59:16,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:16,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-12 23:59:16,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:16,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:16,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127387792] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:16,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:16,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-10-12 23:59:16,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744706128] [2021-10-12 23:59:16,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-12 23:59:16,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:16,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-12 23:59:16,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-10-12 23:59:16,460 INFO L87 Difference]: Start difference. First operand 47 states and 113 transitions. Second operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 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) [2021-10-12 23:59:16,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:16,804 INFO L93 Difference]: Finished difference Result 100 states and 241 transitions. [2021-10-12 23:59:16,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-12 23:59:16,804 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 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 15 [2021-10-12 23:59:16,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:16,805 INFO L225 Difference]: With dead ends: 100 [2021-10-12 23:59:16,805 INFO L226 Difference]: Without dead ends: 80 [2021-10-12 23:59:16,806 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 296.6ms TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-10-12 23:59:16,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-12 23:59:16,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 47. [2021-10-12 23:59:16,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.4782608695652173) internal successors, (114), 46 states have internal predecessors, (114), 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) [2021-10-12 23:59:16,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 114 transitions. [2021-10-12 23:59:16,809 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 114 transitions. Word has length 15 [2021-10-12 23:59:16,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:16,810 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 114 transitions. [2021-10-12 23:59:16,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 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) [2021-10-12 23:59:16,810 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 114 transitions. [2021-10-12 23:59:16,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-12 23:59:16,811 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:16,811 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:16,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:17,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:17,012 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-12 23:59:17,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:17,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1972247363, now seen corresponding path program 9 times [2021-10-12 23:59:17,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:17,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230500862] [2021-10-12 23:59:17,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:17,012 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:17,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:17,145 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:17,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:17,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230500862] [2021-10-12 23:59:17,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230500862] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:17,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114935107] [2021-10-12 23:59:17,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-12 23:59:17,146 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:17,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:17,147 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:17,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-12 23:59:17,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-12 23:59:17,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:17,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-12 23:59:17,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:17,375 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:17,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114935107] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:17,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:17,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-10-12 23:59:17,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472188390] [2021-10-12 23:59:17,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-12 23:59:17,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:17,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-12 23:59:17,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-10-12 23:59:17,390 INFO L87 Difference]: Start difference. First operand 47 states and 114 transitions. Second operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 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) [2021-10-12 23:59:17,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:17,711 INFO L93 Difference]: Finished difference Result 90 states and 219 transitions. [2021-10-12 23:59:17,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-12 23:59:17,711 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 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 16 [2021-10-12 23:59:17,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:17,712 INFO L225 Difference]: With dead ends: 90 [2021-10-12 23:59:17,713 INFO L226 Difference]: Without dead ends: 75 [2021-10-12 23:59:17,713 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 300.5ms TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2021-10-12 23:59:17,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-12 23:59:17,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2021-10-12 23:59:17,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.4925373134328357) internal successors, (167), 67 states have internal predecessors, (167), 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) [2021-10-12 23:59:17,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2021-10-12 23:59:17,722 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 16 [2021-10-12 23:59:17,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:17,722 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2021-10-12 23:59:17,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 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) [2021-10-12 23:59:17,723 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2021-10-12 23:59:17,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-12 23:59:17,724 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:17,724 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:17,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:17,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:17,937 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-12 23:59:17,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:17,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1010115109, now seen corresponding path program 10 times [2021-10-12 23:59:17,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:17,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892809207] [2021-10-12 23:59:17,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:17,939 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:17,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:18,071 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:18,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:18,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892809207] [2021-10-12 23:59:18,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892809207] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:18,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536541249] [2021-10-12 23:59:18,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-12 23:59:18,075 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:18,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:18,080 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:18,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-12 23:59:18,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-12 23:59:18,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:18,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-12 23:59:18,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:18,307 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:18,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536541249] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:18,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:18,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-10-12 23:59:18,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140067431] [2021-10-12 23:59:18,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-12 23:59:18,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:18,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-12 23:59:18,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-12 23:59:18,311 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 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) [2021-10-12 23:59:18,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:18,753 INFO L93 Difference]: Finished difference Result 87 states and 213 transitions. [2021-10-12 23:59:18,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-12 23:59:18,754 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 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 17 [2021-10-12 23:59:18,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:18,755 INFO L225 Difference]: With dead ends: 87 [2021-10-12 23:59:18,755 INFO L226 Difference]: Without dead ends: 75 [2021-10-12 23:59:18,756 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 366.0ms TimeCoverageRelationStatistics Valid=350, Invalid=772, Unknown=0, NotChecked=0, Total=1122 [2021-10-12 23:59:18,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-12 23:59:18,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2021-10-12 23:59:18,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.492957746478873) internal successors, (177), 71 states have internal predecessors, (177), 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) [2021-10-12 23:59:18,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2021-10-12 23:59:18,760 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 17 [2021-10-12 23:59:18,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:18,761 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2021-10-12 23:59:18,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 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) [2021-10-12 23:59:18,761 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2021-10-12 23:59:18,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-12 23:59:18,761 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:18,762 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:18,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:18,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:18,976 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-12 23:59:18,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:18,977 INFO L82 PathProgramCache]: Analyzing trace with hash 887437825, now seen corresponding path program 11 times [2021-10-12 23:59:18,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:18,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622857409] [2021-10-12 23:59:18,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:18,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:18,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:19,084 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:19,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:19,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622857409] [2021-10-12 23:59:19,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622857409] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:19,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76973923] [2021-10-12 23:59:19,085 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-12 23:59:19,085 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:19,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:19,086 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:19,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-12 23:59:19,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-12 23:59:19,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:19,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-12 23:59:19,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:19,308 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:19,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76973923] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:19,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:19,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-10-12 23:59:19,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393561859] [2021-10-12 23:59:19,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-12 23:59:19,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:19,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-12 23:59:19,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-10-12 23:59:19,313 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 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) [2021-10-12 23:59:19,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:19,604 INFO L93 Difference]: Finished difference Result 93 states and 227 transitions. [2021-10-12 23:59:19,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-12 23:59:19,604 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 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 17 [2021-10-12 23:59:19,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:19,605 INFO L225 Difference]: With dead ends: 93 [2021-10-12 23:59:19,605 INFO L226 Difference]: Without dead ends: 78 [2021-10-12 23:59:19,606 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 273.1ms TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2021-10-12 23:59:19,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-12 23:59:19,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 50. [2021-10-12 23:59:19,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.4693877551020407) internal successors, (121), 49 states have internal predecessors, (121), 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) [2021-10-12 23:59:19,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2021-10-12 23:59:19,610 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 17 [2021-10-12 23:59:19,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:19,610 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2021-10-12 23:59:19,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 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) [2021-10-12 23:59:19,610 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2021-10-12 23:59:19,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-12 23:59:19,611 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:19,611 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:19,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:19,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:19,824 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-12 23:59:19,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:19,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1740779799, now seen corresponding path program 12 times [2021-10-12 23:59:19,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:19,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512674302] [2021-10-12 23:59:19,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:19,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:19,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:19,974 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:19,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:19,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512674302] [2021-10-12 23:59:19,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512674302] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:19,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574933362] [2021-10-12 23:59:19,975 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-12 23:59:19,975 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:19,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:19,976 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:19,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-12 23:59:20,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-12 23:59:20,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:20,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-12 23:59:20,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:20,208 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:20,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574933362] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:20,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:20,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-10-12 23:59:20,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689261377] [2021-10-12 23:59:20,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-12 23:59:20,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:20,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-12 23:59:20,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-10-12 23:59:20,210 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 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) [2021-10-12 23:59:20,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:20,640 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2021-10-12 23:59:20,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-12 23:59:20,640 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-12 23:59:20,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:20,641 INFO L225 Difference]: With dead ends: 106 [2021-10-12 23:59:20,641 INFO L226 Difference]: Without dead ends: 92 [2021-10-12 23:59:20,642 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 386.1ms TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2021-10-12 23:59:20,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-12 23:59:20,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 66. [2021-10-12 23:59:20,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.5692307692307694) internal successors, (167), 65 states have internal predecessors, (167), 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) [2021-10-12 23:59:20,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 167 transitions. [2021-10-12 23:59:20,644 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 167 transitions. Word has length 18 [2021-10-12 23:59:20,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:20,644 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 167 transitions. [2021-10-12 23:59:20,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 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) [2021-10-12 23:59:20,645 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 167 transitions. [2021-10-12 23:59:20,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-12 23:59:20,645 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:20,645 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:20,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:20,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-12 23:59:20,850 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-12 23:59:20,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:20,850 INFO L82 PathProgramCache]: Analyzing trace with hash -57718435, now seen corresponding path program 13 times [2021-10-12 23:59:20,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:20,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275211114] [2021-10-12 23:59:20,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:20,851 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:20,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:21,018 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:21,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:21,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275211114] [2021-10-12 23:59:21,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275211114] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:21,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202964132] [2021-10-12 23:59:21,019 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-12 23:59:21,019 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:21,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:21,024 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:21,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-12 23:59:21,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:21,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-12 23:59:21,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:21,286 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:21,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202964132] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:21,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:21,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-10-12 23:59:21,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266695269] [2021-10-12 23:59:21,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-12 23:59:21,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:21,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-12 23:59:21,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-10-12 23:59:21,289 INFO L87 Difference]: Start difference. First operand 66 states and 167 transitions. Second operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:21,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:21,821 INFO L93 Difference]: Finished difference Result 108 states and 260 transitions. [2021-10-12 23:59:21,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-12 23:59:21,821 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-12 23:59:21,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:21,822 INFO L225 Difference]: With dead ends: 108 [2021-10-12 23:59:21,823 INFO L226 Difference]: Without dead ends: 94 [2021-10-12 23:59:21,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 489.8ms TimeCoverageRelationStatistics Valid=517, Invalid=1205, Unknown=0, NotChecked=0, Total=1722 [2021-10-12 23:59:21,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-12 23:59:21,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 56. [2021-10-12 23:59:21,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.4545454545454546) internal successors, (135), 55 states have internal predecessors, (135), 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) [2021-10-12 23:59:21,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 135 transitions. [2021-10-12 23:59:21,831 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 135 transitions. Word has length 19 [2021-10-12 23:59:21,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:21,831 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 135 transitions. [2021-10-12 23:59:21,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:21,831 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 135 transitions. [2021-10-12 23:59:21,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-12 23:59:21,832 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:21,832 INFO L512 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:21,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:22,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-12 23:59:22,036 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-12 23:59:22,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:22,037 INFO L82 PathProgramCache]: Analyzing trace with hash 2147399191, now seen corresponding path program 14 times [2021-10-12 23:59:22,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:22,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229361104] [2021-10-12 23:59:22,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:22,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:22,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:22,212 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-12 23:59:22,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:22,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229361104] [2021-10-12 23:59:22,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229361104] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:22,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71828999] [2021-10-12 23:59:22,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-12 23:59:22,214 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:22,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:22,216 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:22,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-12 23:59:22,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-12 23:59:22,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:22,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-12 23:59:22,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:22,544 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-12 23:59:22,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71828999] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:22,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:22,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-10-12 23:59:22,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651167751] [2021-10-12 23:59:22,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-12 23:59:22,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:22,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-12 23:59:22,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-10-12 23:59:22,550 INFO L87 Difference]: Start difference. First operand 56 states and 135 transitions. Second operand has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:23,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:23,040 INFO L93 Difference]: Finished difference Result 94 states and 229 transitions. [2021-10-12 23:59:23,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-12 23:59:23,041 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-12 23:59:23,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:23,042 INFO L225 Difference]: With dead ends: 94 [2021-10-12 23:59:23,042 INFO L226 Difference]: Without dead ends: 88 [2021-10-12 23:59:23,043 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 470.7ms TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2021-10-12 23:59:23,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-12 23:59:23,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2021-10-12 23:59:23,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.573529411764706) internal successors, (175), 68 states have internal predecessors, (175), 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) [2021-10-12 23:59:23,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 175 transitions. [2021-10-12 23:59:23,047 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 175 transitions. Word has length 20 [2021-10-12 23:59:23,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:23,047 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 175 transitions. [2021-10-12 23:59:23,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:23,048 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 175 transitions. [2021-10-12 23:59:23,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-12 23:59:23,050 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:23,050 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:23,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:23,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-12 23:59:23,251 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-12 23:59:23,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:23,251 INFO L82 PathProgramCache]: Analyzing trace with hash 2147401113, now seen corresponding path program 15 times [2021-10-12 23:59:23,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:23,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693142189] [2021-10-12 23:59:23,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:23,252 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:23,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:23,410 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:23,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:23,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693142189] [2021-10-12 23:59:23,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693142189] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:23,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632478403] [2021-10-12 23:59:23,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-12 23:59:23,412 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:23,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:23,413 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:23,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-12 23:59:23,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-12 23:59:23,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:23,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-12 23:59:23,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:23,734 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:23,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632478403] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:23,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:23,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-10-12 23:59:23,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926218405] [2021-10-12 23:59:23,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-12 23:59:23,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:23,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-12 23:59:23,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-10-12 23:59:23,737 INFO L87 Difference]: Start difference. First operand 69 states and 175 transitions. Second operand has 18 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 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) [2021-10-12 23:59:24,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:24,320 INFO L93 Difference]: Finished difference Result 112 states and 269 transitions. [2021-10-12 23:59:24,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-12 23:59:24,321 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 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 20 [2021-10-12 23:59:24,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:24,322 INFO L225 Difference]: With dead ends: 112 [2021-10-12 23:59:24,322 INFO L226 Difference]: Without dead ends: 98 [2021-10-12 23:59:24,323 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 510.9ms TimeCoverageRelationStatistics Valid=495, Invalid=1311, Unknown=0, NotChecked=0, Total=1806 [2021-10-12 23:59:24,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-12 23:59:24,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 56. [2021-10-12 23:59:24,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.4727272727272727) internal successors, (136), 55 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) [2021-10-12 23:59:24,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 136 transitions. [2021-10-12 23:59:24,328 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 136 transitions. Word has length 20 [2021-10-12 23:59:24,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:24,328 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 136 transitions. [2021-10-12 23:59:24,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 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) [2021-10-12 23:59:24,328 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 136 transitions. [2021-10-12 23:59:24,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-12 23:59:24,329 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:24,329 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:24,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:24,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-12 23:59:24,541 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-12 23:59:24,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:24,543 INFO L82 PathProgramCache]: Analyzing trace with hash 367449309, now seen corresponding path program 16 times [2021-10-12 23:59:24,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:24,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558395247] [2021-10-12 23:59:24,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:24,544 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:24,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:24,713 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-12 23:59:24,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:24,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558395247] [2021-10-12 23:59:24,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558395247] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:24,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746286424] [2021-10-12 23:59:24,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-12 23:59:24,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:24,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:24,716 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:24,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-12 23:59:24,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-12 23:59:24,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:24,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-12 23:59:24,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:25,055 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-12 23:59:25,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746286424] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:25,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:25,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-10-12 23:59:25,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041416385] [2021-10-12 23:59:25,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-12 23:59:25,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:25,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-12 23:59:25,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-10-12 23:59:25,065 INFO L87 Difference]: Start difference. First operand 56 states and 136 transitions. Second operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:25,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:25,655 INFO L93 Difference]: Finished difference Result 113 states and 274 transitions. [2021-10-12 23:59:25,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-12 23:59:25,656 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-12 23:59:25,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:25,657 INFO L225 Difference]: With dead ends: 113 [2021-10-12 23:59:25,658 INFO L226 Difference]: Without dead ends: 102 [2021-10-12 23:59:25,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 541.5ms TimeCoverageRelationStatistics Valid=606, Invalid=1286, Unknown=0, NotChecked=0, Total=1892 [2021-10-12 23:59:25,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-10-12 23:59:25,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 88. [2021-10-12 23:59:25,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.471264367816092) internal successors, (215), 87 states have internal predecessors, (215), 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) [2021-10-12 23:59:25,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2021-10-12 23:59:25,664 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 21 [2021-10-12 23:59:25,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:25,665 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2021-10-12 23:59:25,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:25,665 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2021-10-12 23:59:25,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-12 23:59:25,666 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:25,666 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:25,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:25,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-12 23:59:25,867 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-12 23:59:25,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:25,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1493904649, now seen corresponding path program 17 times [2021-10-12 23:59:25,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:25,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998449870] [2021-10-12 23:59:25,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:25,868 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:25,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:26,059 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:26,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:26,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998449870] [2021-10-12 23:59:26,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998449870] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:26,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302204991] [2021-10-12 23:59:26,060 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-12 23:59:26,060 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:26,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:26,061 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:26,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-12 23:59:26,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-10-12 23:59:26,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:26,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-12 23:59:26,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:26,356 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:26,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302204991] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:26,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:26,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-10-12 23:59:26,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995701525] [2021-10-12 23:59:26,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-12 23:59:26,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:26,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-12 23:59:26,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-10-12 23:59:26,358 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 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) [2021-10-12 23:59:26,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:26,963 INFO L93 Difference]: Finished difference Result 128 states and 310 transitions. [2021-10-12 23:59:26,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-12 23:59:26,964 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 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 22 [2021-10-12 23:59:26,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:26,965 INFO L225 Difference]: With dead ends: 128 [2021-10-12 23:59:26,965 INFO L226 Difference]: Without dead ends: 108 [2021-10-12 23:59:26,967 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 579.8ms TimeCoverageRelationStatistics Valid=781, Invalid=1669, Unknown=0, NotChecked=0, Total=2450 [2021-10-12 23:59:26,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-10-12 23:59:26,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 92. [2021-10-12 23:59:26,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.4725274725274726) internal successors, (225), 91 states have internal predecessors, (225), 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) [2021-10-12 23:59:26,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 225 transitions. [2021-10-12 23:59:26,971 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 225 transitions. Word has length 22 [2021-10-12 23:59:26,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:26,972 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 225 transitions. [2021-10-12 23:59:26,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 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) [2021-10-12 23:59:26,972 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 225 transitions. [2021-10-12 23:59:26,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-12 23:59:26,975 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:26,976 INFO L512 BasicCegarLoop]: trace histogram [8, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:27,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:27,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:27,176 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-12 23:59:27,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:27,177 INFO L82 PathProgramCache]: Analyzing trace with hash 2068458009, now seen corresponding path program 18 times [2021-10-12 23:59:27,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:27,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587785726] [2021-10-12 23:59:27,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:27,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:27,366 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-12 23:59:27,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:27,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587785726] [2021-10-12 23:59:27,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587785726] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:27,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113714962] [2021-10-12 23:59:27,367 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-12 23:59:27,367 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:27,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:27,369 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:27,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-12 23:59:27,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-12 23:59:27,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:27,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-12 23:59:27,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:27,735 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-12 23:59:27,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113714962] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:27,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:27,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-10-12 23:59:27,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995264033] [2021-10-12 23:59:27,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-12 23:59:27,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:27,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-12 23:59:27,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-10-12 23:59:27,738 INFO L87 Difference]: Start difference. First operand 92 states and 225 transitions. Second operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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) [2021-10-12 23:59:28,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:28,382 INFO L93 Difference]: Finished difference Result 121 states and 294 transitions. [2021-10-12 23:59:28,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-12 23:59:28,383 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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 22 [2021-10-12 23:59:28,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:28,384 INFO L225 Difference]: With dead ends: 121 [2021-10-12 23:59:28,384 INFO L226 Difference]: Without dead ends: 110 [2021-10-12 23:59:28,384 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 639.6ms TimeCoverageRelationStatistics Valid=621, Invalid=1359, Unknown=0, NotChecked=0, Total=1980 [2021-10-12 23:59:28,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-10-12 23:59:28,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 63. [2021-10-12 23:59:28,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.467741935483871) internal successors, (153), 62 states have internal predecessors, (153), 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) [2021-10-12 23:59:28,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 153 transitions. [2021-10-12 23:59:28,389 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 153 transitions. Word has length 22 [2021-10-12 23:59:28,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:28,389 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 153 transitions. [2021-10-12 23:59:28,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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) [2021-10-12 23:59:28,390 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 153 transitions. [2021-10-12 23:59:28,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-12 23:59:28,390 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:28,390 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:28,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:28,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:28,605 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-12 23:59:28,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:28,605 INFO L82 PathProgramCache]: Analyzing trace with hash -302242501, now seen corresponding path program 19 times [2021-10-12 23:59:28,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:28,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434638258] [2021-10-12 23:59:28,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:28,606 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:28,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:28,823 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:28,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:28,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434638258] [2021-10-12 23:59:28,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434638258] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:28,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124440841] [2021-10-12 23:59:28,824 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-12 23:59:28,824 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:28,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:28,829 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:28,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-12 23:59:29,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:29,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-12 23:59:29,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:29,215 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:29,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124440841] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:29,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:29,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-10-12 23:59:29,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819701582] [2021-10-12 23:59:29,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-12 23:59:29,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:29,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-12 23:59:29,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-10-12 23:59:29,218 INFO L87 Difference]: Start difference. First operand 63 states and 153 transitions. Second operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 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) [2021-10-12 23:59:29,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:29,966 INFO L93 Difference]: Finished difference Result 118 states and 289 transitions. [2021-10-12 23:59:29,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-12 23:59:29,967 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 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 23 [2021-10-12 23:59:29,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:29,968 INFO L225 Difference]: With dead ends: 118 [2021-10-12 23:59:29,968 INFO L226 Difference]: Without dead ends: 103 [2021-10-12 23:59:29,970 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 724.5ms TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2021-10-12 23:59:29,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-10-12 23:59:29,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 96. [2021-10-12 23:59:29,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.4947368421052634) internal successors, (237), 95 states have internal predecessors, (237), 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) [2021-10-12 23:59:29,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 237 transitions. [2021-10-12 23:59:29,974 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 237 transitions. Word has length 23 [2021-10-12 23:59:29,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:29,974 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 237 transitions. [2021-10-12 23:59:29,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 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) [2021-10-12 23:59:29,975 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 237 transitions. [2021-10-12 23:59:29,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-12 23:59:29,975 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:29,975 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:30,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:30,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-12 23:59:30,188 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-12 23:59:30,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:30,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1122940747, now seen corresponding path program 20 times [2021-10-12 23:59:30,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:30,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431254518] [2021-10-12 23:59:30,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:30,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:30,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:30,422 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:30,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:30,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431254518] [2021-10-12 23:59:30,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431254518] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:30,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260698945] [2021-10-12 23:59:30,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-12 23:59:30,423 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:30,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:30,424 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:30,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-12 23:59:30,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-12 23:59:30,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:30,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-12 23:59:30,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:30,776 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:30,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260698945] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:30,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:30,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-10-12 23:59:30,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397820485] [2021-10-12 23:59:30,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-12 23:59:30,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:30,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-12 23:59:30,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-10-12 23:59:30,779 INFO L87 Difference]: Start difference. First operand 96 states and 237 transitions. Second operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 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) [2021-10-12 23:59:31,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:31,491 INFO L93 Difference]: Finished difference Result 117 states and 287 transitions. [2021-10-12 23:59:31,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-12 23:59:31,491 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-12 23:59:31,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:31,493 INFO L225 Difference]: With dead ends: 117 [2021-10-12 23:59:31,493 INFO L226 Difference]: Without dead ends: 102 [2021-10-12 23:59:31,494 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 703.1ms TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2021-10-12 23:59:31,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-10-12 23:59:31,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 62. [2021-10-12 23:59:31,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.4754098360655736) internal successors, (151), 61 states have internal predecessors, (151), 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) [2021-10-12 23:59:31,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2021-10-12 23:59:31,498 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 24 [2021-10-12 23:59:31,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:31,499 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2021-10-12 23:59:31,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 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) [2021-10-12 23:59:31,499 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2021-10-12 23:59:31,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-12 23:59:31,500 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:31,500 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:31,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:31,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-12 23:59:31,701 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-12 23:59:31,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:31,701 INFO L82 PathProgramCache]: Analyzing trace with hash -779571939, now seen corresponding path program 21 times [2021-10-12 23:59:31,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:31,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238752678] [2021-10-12 23:59:31,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:31,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:31,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:31,924 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:31,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:31,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238752678] [2021-10-12 23:59:31,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238752678] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:31,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659540997] [2021-10-12 23:59:31,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-12 23:59:31,925 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:31,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:31,925 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:31,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-12 23:59:32,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-12 23:59:32,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:32,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-12 23:59:32,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:32,334 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:32,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659540997] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:32,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:32,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-10-12 23:59:32,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069037922] [2021-10-12 23:59:32,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-12 23:59:32,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:32,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-12 23:59:32,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-10-12 23:59:32,337 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 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) [2021-10-12 23:59:33,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:33,116 INFO L93 Difference]: Finished difference Result 114 states and 281 transitions. [2021-10-12 23:59:33,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-12 23:59:33,118 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-12 23:59:33,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:33,119 INFO L225 Difference]: With dead ends: 114 [2021-10-12 23:59:33,119 INFO L226 Difference]: Without dead ends: 102 [2021-10-12 23:59:33,120 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 748.4ms TimeCoverageRelationStatistics Valid=765, Invalid=1991, Unknown=0, NotChecked=0, Total=2756 [2021-10-12 23:59:33,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-10-12 23:59:33,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 62. [2021-10-12 23:59:33,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.4918032786885247) internal successors, (152), 61 states have internal predecessors, (152), 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) [2021-10-12 23:59:33,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2021-10-12 23:59:33,124 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 24 [2021-10-12 23:59:33,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:33,125 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2021-10-12 23:59:33,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 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) [2021-10-12 23:59:33,125 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2021-10-12 23:59:33,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-12 23:59:33,127 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:33,127 INFO L512 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:33,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:33,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-12 23:59:33,328 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-12 23:59:33,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:33,328 INFO L82 PathProgramCache]: Analyzing trace with hash -451413789, now seen corresponding path program 22 times [2021-10-12 23:59:33,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:33,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413442851] [2021-10-12 23:59:33,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:33,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:33,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:33,532 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:33,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:33,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413442851] [2021-10-12 23:59:33,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413442851] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:33,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652171103] [2021-10-12 23:59:33,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-12 23:59:33,533 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:33,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:33,534 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:33,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-12 23:59:33,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-12 23:59:33,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:33,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-12 23:59:33,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:33,950 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:33,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652171103] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:33,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:33,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-10-12 23:59:33,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183481155] [2021-10-12 23:59:33,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-12 23:59:33,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:33,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-12 23:59:33,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-10-12 23:59:33,952 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:34,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:34,804 INFO L93 Difference]: Finished difference Result 118 states and 291 transitions. [2021-10-12 23:59:34,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-12 23:59:34,804 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-12 23:59:34,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:34,805 INFO L225 Difference]: With dead ends: 118 [2021-10-12 23:59:34,805 INFO L226 Difference]: Without dead ends: 106 [2021-10-12 23:59:34,806 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 790.4ms TimeCoverageRelationStatistics Valid=1018, Invalid=2288, Unknown=0, NotChecked=0, Total=3306 [2021-10-12 23:59:34,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-10-12 23:59:34,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 66. [2021-10-12 23:59:34,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.476923076923077) internal successors, (161), 65 states have internal predecessors, (161), 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) [2021-10-12 23:59:34,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2021-10-12 23:59:34,810 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 25 [2021-10-12 23:59:34,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:34,810 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2021-10-12 23:59:34,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:34,811 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2021-10-12 23:59:34,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-12 23:59:34,811 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:34,811 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:34,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:35,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-12 23:59:35,017 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-12 23:59:35,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:35,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1844031457, now seen corresponding path program 23 times [2021-10-12 23:59:35,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:35,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307149973] [2021-10-12 23:59:35,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:35,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:35,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:35,258 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:35,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:35,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307149973] [2021-10-12 23:59:35,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307149973] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:35,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978193273] [2021-10-12 23:59:35,259 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-12 23:59:35,259 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:35,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:35,259 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:35,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-12 23:59:35,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-10-12 23:59:35,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:35,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-12 23:59:35,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:35,633 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:35,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978193273] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:35,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:35,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-10-12 23:59:35,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152723415] [2021-10-12 23:59:35,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-12 23:59:35,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:35,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-12 23:59:35,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2021-10-12 23:59:35,637 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:36,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:36,536 INFO L93 Difference]: Finished difference Result 138 states and 335 transitions. [2021-10-12 23:59:36,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-12 23:59:36,545 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-12 23:59:36,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:36,546 INFO L225 Difference]: With dead ends: 138 [2021-10-12 23:59:36,546 INFO L226 Difference]: Without dead ends: 124 [2021-10-12 23:59:36,548 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 869.3ms TimeCoverageRelationStatistics Valid=1175, Invalid=2731, Unknown=0, NotChecked=0, Total=3906 [2021-10-12 23:59:36,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-12 23:59:36,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 90. [2021-10-12 23:59:36,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.595505617977528) internal successors, (231), 89 states have internal predecessors, (231), 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) [2021-10-12 23:59:36,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 231 transitions. [2021-10-12 23:59:36,570 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 231 transitions. Word has length 26 [2021-10-12 23:59:36,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:36,570 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 231 transitions. [2021-10-12 23:59:36,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:36,571 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 231 transitions. [2021-10-12 23:59:36,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-12 23:59:36,571 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:36,572 INFO L512 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:36,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:36,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-12 23:59:36,792 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-12 23:59:36,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:36,793 INFO L82 PathProgramCache]: Analyzing trace with hash -16661915, now seen corresponding path program 24 times [2021-10-12 23:59:36,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:36,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709458101] [2021-10-12 23:59:36,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:36,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:36,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:37,056 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:37,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:37,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709458101] [2021-10-12 23:59:37,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709458101] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:37,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440413453] [2021-10-12 23:59:37,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-12 23:59:37,057 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:37,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:37,058 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:37,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-12 23:59:37,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-10-12 23:59:37,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:37,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-12 23:59:37,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:37,523 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:37,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440413453] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:37,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:37,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-10-12 23:59:37,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039833415] [2021-10-12 23:59:37,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-12 23:59:37,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:37,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-12 23:59:37,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-10-12 23:59:37,527 INFO L87 Difference]: Start difference. First operand 90 states and 231 transitions. Second operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:38,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:38,376 INFO L93 Difference]: Finished difference Result 128 states and 315 transitions. [2021-10-12 23:59:38,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-12 23:59:38,376 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-12 23:59:38,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:38,378 INFO L225 Difference]: With dead ends: 128 [2021-10-12 23:59:38,378 INFO L226 Difference]: Without dead ends: 116 [2021-10-12 23:59:38,380 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 818.8ms TimeCoverageRelationStatistics Valid=1129, Invalid=2903, Unknown=0, NotChecked=0, Total=4032 [2021-10-12 23:59:38,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-10-12 23:59:38,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2021-10-12 23:59:38,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.597826086956522) internal successors, (239), 92 states have internal predecessors, (239), 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) [2021-10-12 23:59:38,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 239 transitions. [2021-10-12 23:59:38,399 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 239 transitions. Word has length 27 [2021-10-12 23:59:38,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:38,399 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 239 transitions. [2021-10-12 23:59:38,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:38,400 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 239 transitions. [2021-10-12 23:59:38,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-12 23:59:38,401 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:38,401 INFO L512 BasicCegarLoop]: trace histogram [11, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:38,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:38,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-12 23:59:38,616 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-12 23:59:38,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:38,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1707553567, now seen corresponding path program 25 times [2021-10-12 23:59:38,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:38,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834731139] [2021-10-12 23:59:38,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:38,618 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:38,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:38,916 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-12 23:59:38,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:38,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834731139] [2021-10-12 23:59:38,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834731139] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:38,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501115249] [2021-10-12 23:59:38,917 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-12 23:59:38,917 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:38,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:38,921 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:38,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-12 23:59:39,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:39,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-12 23:59:39,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:39,441 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-12 23:59:39,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501115249] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:39,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:39,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-10-12 23:59:39,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484148756] [2021-10-12 23:59:39,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-12 23:59:39,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:39,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-12 23:59:39,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2021-10-12 23:59:39,443 INFO L87 Difference]: Start difference. First operand 93 states and 239 transitions. Second operand has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 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) [2021-10-12 23:59:40,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:40,243 INFO L93 Difference]: Finished difference Result 140 states and 342 transitions. [2021-10-12 23:59:40,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-12 23:59:40,243 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 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) Word has length 28 [2021-10-12 23:59:40,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:40,245 INFO L225 Difference]: With dead ends: 140 [2021-10-12 23:59:40,245 INFO L226 Difference]: Without dead ends: 129 [2021-10-12 23:59:40,247 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 842.7ms TimeCoverageRelationStatistics Valid=1215, Invalid=2691, Unknown=0, NotChecked=0, Total=3906 [2021-10-12 23:59:40,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-10-12 23:59:40,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 116. [2021-10-12 23:59:40,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.4956521739130433) internal successors, (287), 115 states have internal predecessors, (287), 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) [2021-10-12 23:59:40,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 287 transitions. [2021-10-12 23:59:40,251 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 287 transitions. Word has length 28 [2021-10-12 23:59:40,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:40,252 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 287 transitions. [2021-10-12 23:59:40,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 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) [2021-10-12 23:59:40,252 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 287 transitions. [2021-10-12 23:59:40,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-12 23:59:40,253 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:40,253 INFO L512 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:40,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-10-12 23:59:40,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:40,468 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-12 23:59:40,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:40,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1168061287, now seen corresponding path program 26 times [2021-10-12 23:59:40,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:40,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63321812] [2021-10-12 23:59:40,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:40,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:40,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:40,736 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:40,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:40,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63321812] [2021-10-12 23:59:40,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63321812] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:40,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201843844] [2021-10-12 23:59:40,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-12 23:59:40,737 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:40,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:40,738 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:40,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-12 23:59:41,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-12 23:59:41,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:41,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-12 23:59:41,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:41,172 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:41,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201843844] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:41,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:41,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-10-12 23:59:41,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872349967] [2021-10-12 23:59:41,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-12 23:59:41,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:41,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-12 23:59:41,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2021-10-12 23:59:41,174 INFO L87 Difference]: Start difference. First operand 116 states and 287 transitions. Second operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 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) [2021-10-12 23:59:42,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:42,207 INFO L93 Difference]: Finished difference Result 151 states and 367 transitions. [2021-10-12 23:59:42,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-10-12 23:59:42,208 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 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) Word has length 29 [2021-10-12 23:59:42,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:42,209 INFO L225 Difference]: With dead ends: 151 [2021-10-12 23:59:42,210 INFO L226 Difference]: Without dead ends: 137 [2021-10-12 23:59:42,212 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 975.8ms TimeCoverageRelationStatistics Valid=1399, Invalid=3713, Unknown=0, NotChecked=0, Total=5112 [2021-10-12 23:59:42,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-10-12 23:59:42,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 120. [2021-10-12 23:59:42,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.4789915966386555) internal successors, (295), 119 states have internal predecessors, (295), 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) [2021-10-12 23:59:42,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 295 transitions. [2021-10-12 23:59:42,217 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 295 transitions. Word has length 29 [2021-10-12 23:59:42,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:42,217 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 295 transitions. [2021-10-12 23:59:42,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 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) [2021-10-12 23:59:42,218 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 295 transitions. [2021-10-12 23:59:42,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-12 23:59:42,218 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:42,218 INFO L512 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:42,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:42,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-12 23:59:42,419 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-12 23:59:42,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:42,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1394621685, now seen corresponding path program 27 times [2021-10-12 23:59:42,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:42,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603875911] [2021-10-12 23:59:42,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:42,420 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:42,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:42,716 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:42,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:42,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603875911] [2021-10-12 23:59:42,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603875911] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:42,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280874258] [2021-10-12 23:59:42,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-12 23:59:42,716 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:42,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:42,717 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:42,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-12 23:59:42,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-10-12 23:59:42,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:42,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-12 23:59:42,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:43,186 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:43,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280874258] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:43,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:43,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-10-12 23:59:43,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15097715] [2021-10-12 23:59:43,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-12 23:59:43,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:43,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-12 23:59:43,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2021-10-12 23:59:43,189 INFO L87 Difference]: Start difference. First operand 120 states and 295 transitions. Second operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 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) [2021-10-12 23:59:44,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:44,225 INFO L93 Difference]: Finished difference Result 160 states and 390 transitions. [2021-10-12 23:59:44,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-10-12 23:59:44,225 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 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) Word has length 29 [2021-10-12 23:59:44,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:44,226 INFO L225 Difference]: With dead ends: 160 [2021-10-12 23:59:44,227 INFO L226 Difference]: Without dead ends: 140 [2021-10-12 23:59:44,229 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 1000.6ms TimeCoverageRelationStatistics Valid=1457, Invalid=3235, Unknown=0, NotChecked=0, Total=4692 [2021-10-12 23:59:44,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-10-12 23:59:44,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 124. [2021-10-12 23:59:44,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.4796747967479673) internal successors, (305), 123 states have internal predecessors, (305), 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) [2021-10-12 23:59:44,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 305 transitions. [2021-10-12 23:59:44,234 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 305 transitions. Word has length 29 [2021-10-12 23:59:44,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:44,234 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 305 transitions. [2021-10-12 23:59:44,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 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) [2021-10-12 23:59:44,235 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 305 transitions. [2021-10-12 23:59:44,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-12 23:59:44,235 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:44,235 INFO L512 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:44,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:44,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-12 23:59:44,456 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-12 23:59:44,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:44,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1520723047, now seen corresponding path program 28 times [2021-10-12 23:59:44,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:44,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794494767] [2021-10-12 23:59:44,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:44,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:44,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:44,732 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-12 23:59:44,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:44,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794494767] [2021-10-12 23:59:44,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794494767] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:44,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256712736] [2021-10-12 23:59:44,733 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-12 23:59:44,733 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:44,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:44,737 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:44,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-12 23:59:45,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-12 23:59:45,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:45,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-12 23:59:45,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:45,221 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-12 23:59:45,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256712736] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:45,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:45,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-10-12 23:59:45,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102336223] [2021-10-12 23:59:45,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-12 23:59:45,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:45,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-12 23:59:45,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2021-10-12 23:59:45,224 INFO L87 Difference]: Start difference. First operand 124 states and 305 transitions. Second operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 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) [2021-10-12 23:59:46,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:46,199 INFO L93 Difference]: Finished difference Result 153 states and 374 transitions. [2021-10-12 23:59:46,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-10-12 23:59:46,199 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 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 31 [2021-10-12 23:59:46,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:46,201 INFO L225 Difference]: With dead ends: 153 [2021-10-12 23:59:46,201 INFO L226 Difference]: Without dead ends: 142 [2021-10-12 23:59:46,204 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 984.4ms TimeCoverageRelationStatistics Valid=1701, Invalid=3701, Unknown=0, NotChecked=0, Total=5402 [2021-10-12 23:59:46,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-12 23:59:46,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 79. [2021-10-12 23:59:46,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.4743589743589745) internal successors, (193), 78 states have internal predecessors, (193), 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) [2021-10-12 23:59:46,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 193 transitions. [2021-10-12 23:59:46,212 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 193 transitions. Word has length 31 [2021-10-12 23:59:46,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:46,213 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 193 transitions. [2021-10-12 23:59:46,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 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) [2021-10-12 23:59:46,213 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 193 transitions. [2021-10-12 23:59:46,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-12 23:59:46,214 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:46,214 INFO L512 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:46,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:46,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:46,432 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-12 23:59:46,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:46,433 INFO L82 PathProgramCache]: Analyzing trace with hash 201993011, now seen corresponding path program 29 times [2021-10-12 23:59:46,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:46,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253256028] [2021-10-12 23:59:46,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:46,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:46,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:46,704 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:46,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:46,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253256028] [2021-10-12 23:59:46,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253256028] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:46,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493936071] [2021-10-12 23:59:46,705 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-12 23:59:46,705 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:46,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:46,709 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:46,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-12 23:59:47,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-10-12 23:59:47,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:47,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-12 23:59:47,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:47,297 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:47,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493936071] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:47,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:47,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-10-12 23:59:47,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886634008] [2021-10-12 23:59:47,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-12 23:59:47,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:47,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-12 23:59:47,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=632, Unknown=0, NotChecked=0, Total=812 [2021-10-12 23:59:47,300 INFO L87 Difference]: Start difference. First operand 79 states and 193 transitions. Second operand has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 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) [2021-10-12 23:59:48,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:48,509 INFO L93 Difference]: Finished difference Result 164 states and 401 transitions. [2021-10-12 23:59:48,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-10-12 23:59:48,521 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 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 31 [2021-10-12 23:59:48,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:48,523 INFO L225 Difference]: With dead ends: 164 [2021-10-12 23:59:48,523 INFO L226 Difference]: Without dead ends: 144 [2021-10-12 23:59:48,525 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1444 ImplicationChecksByTransitivity, 1185.9ms TimeCoverageRelationStatistics Valid=1721, Invalid=3829, Unknown=0, NotChecked=0, Total=5550 [2021-10-12 23:59:48,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-12 23:59:48,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 79. [2021-10-12 23:59:48,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.4871794871794872) internal successors, (194), 78 states have internal predecessors, (194), 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) [2021-10-12 23:59:48,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2021-10-12 23:59:48,530 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 31 [2021-10-12 23:59:48,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:48,531 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2021-10-12 23:59:48,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 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) [2021-10-12 23:59:48,531 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2021-10-12 23:59:48,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-12 23:59:48,532 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:48,532 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:48,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:48,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-10-12 23:59:48,748 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-12 23:59:48,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:48,749 INFO L82 PathProgramCache]: Analyzing trace with hash -102157139, now seen corresponding path program 30 times [2021-10-12 23:59:48,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:48,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095525226] [2021-10-12 23:59:48,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:48,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:48,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:49,051 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:49,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:49,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095525226] [2021-10-12 23:59:49,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095525226] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:49,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874718622] [2021-10-12 23:59:49,051 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-12 23:59:49,051 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:49,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:49,052 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:49,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-12 23:59:49,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-10-12 23:59:49,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:49,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-12 23:59:49,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:49,515 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:49,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874718622] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:49,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:49,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-10-12 23:59:49,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351682163] [2021-10-12 23:59:49,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-12 23:59:49,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:49,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-12 23:59:49,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2021-10-12 23:59:49,517 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 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) [2021-10-12 23:59:50,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:50,739 INFO L93 Difference]: Finished difference Result 154 states and 379 transitions. [2021-10-12 23:59:50,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-10-12 23:59:50,740 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 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 32 [2021-10-12 23:59:50,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:50,741 INFO L225 Difference]: With dead ends: 154 [2021-10-12 23:59:50,741 INFO L226 Difference]: Without dead ends: 139 [2021-10-12 23:59:50,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1696 ImplicationChecksByTransitivity, 1206.0ms TimeCoverageRelationStatistics Valid=1930, Invalid=4076, Unknown=0, NotChecked=0, Total=6006 [2021-10-12 23:59:50,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-10-12 23:59:50,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 132. [2021-10-12 23:59:50,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.49618320610687) internal successors, (327), 131 states have internal predecessors, (327), 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) [2021-10-12 23:59:50,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2021-10-12 23:59:50,748 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 32 [2021-10-12 23:59:50,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:50,749 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2021-10-12 23:59:50,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 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) [2021-10-12 23:59:50,749 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2021-10-12 23:59:50,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-12 23:59:50,750 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:50,750 INFO L512 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:50,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-10-12 23:59:50,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:50,976 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-12 23:59:50,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:50,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1128106987, now seen corresponding path program 31 times [2021-10-12 23:59:50,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:50,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056491603] [2021-10-12 23:59:50,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:50,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:50,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:51,313 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:51,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:51,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056491603] [2021-10-12 23:59:51,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056491603] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:51,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631981395] [2021-10-12 23:59:51,314 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-12 23:59:51,314 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:51,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:51,315 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:51,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-12 23:59:51,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:51,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-12 23:59:51,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:51,791 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:51,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631981395] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:51,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:51,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-10-12 23:59:51,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129856785] [2021-10-12 23:59:51,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-12 23:59:51,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:51,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-12 23:59:51,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2021-10-12 23:59:51,793 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 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) [2021-10-12 23:59:52,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:52,950 INFO L93 Difference]: Finished difference Result 167 states and 407 transitions. [2021-10-12 23:59:52,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-10-12 23:59:52,951 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 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 [2021-10-12 23:59:52,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:52,952 INFO L225 Difference]: With dead ends: 167 [2021-10-12 23:59:52,952 INFO L226 Difference]: Without dead ends: 153 [2021-10-12 23:59:52,953 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1949 ImplicationChecksByTransitivity, 1198.3ms TimeCoverageRelationStatistics Valid=2099, Invalid=4873, Unknown=0, NotChecked=0, Total=6972 [2021-10-12 23:59:52,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-10-12 23:59:52,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 136. [2021-10-12 23:59:52,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.4814814814814814) internal successors, (335), 135 states have internal predecessors, (335), 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) [2021-10-12 23:59:52,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 335 transitions. [2021-10-12 23:59:52,958 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 335 transitions. Word has length 33 [2021-10-12 23:59:52,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:52,959 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 335 transitions. [2021-10-12 23:59:52,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 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) [2021-10-12 23:59:52,959 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 335 transitions. [2021-10-12 23:59:52,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-12 23:59:52,960 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:52,960 INFO L512 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:52,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-10-12 23:59:53,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-12 23:59:53,173 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-12 23:59:53,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:53,174 INFO L82 PathProgramCache]: Analyzing trace with hash 842105329, now seen corresponding path program 32 times [2021-10-12 23:59:53,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:53,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612558233] [2021-10-12 23:59:53,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:53,174 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:53,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:53,592 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:53,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:53,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612558233] [2021-10-12 23:59:53,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612558233] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:53,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882444643] [2021-10-12 23:59:53,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-12 23:59:53,593 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:53,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:53,595 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:53,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-12 23:59:53,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-12 23:59:53,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:53,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-12 23:59:53,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:54,140 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:54,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882444643] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:54,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:54,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-10-12 23:59:54,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325111508] [2021-10-12 23:59:54,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-12 23:59:54,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:54,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-12 23:59:54,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2021-10-12 23:59:54,143 INFO L87 Difference]: Start difference. First operand 136 states and 335 transitions. Second operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 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) [2021-10-12 23:59:55,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:55,520 INFO L93 Difference]: Finished difference Result 176 states and 430 transitions. [2021-10-12 23:59:55,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-10-12 23:59:55,521 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 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 [2021-10-12 23:59:55,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:55,525 INFO L225 Difference]: With dead ends: 176 [2021-10-12 23:59:55,525 INFO L226 Difference]: Without dead ends: 156 [2021-10-12 23:59:55,526 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1784 ImplicationChecksByTransitivity, 1418.6ms TimeCoverageRelationStatistics Valid=1872, Invalid=4934, Unknown=0, NotChecked=0, Total=6806 [2021-10-12 23:59:55,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-10-12 23:59:55,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 140. [2021-10-12 23:59:55,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.4820143884892087) internal successors, (345), 139 states have internal predecessors, (345), 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) [2021-10-12 23:59:55,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2021-10-12 23:59:55,534 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 33 [2021-10-12 23:59:55,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:55,534 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2021-10-12 23:59:55,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 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) [2021-10-12 23:59:55,535 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2021-10-12 23:59:55,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-12 23:59:55,536 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:55,536 INFO L512 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:55,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:55,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-10-12 23:59:55,750 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-12 23:59:55,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:55,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1779346411, now seen corresponding path program 33 times [2021-10-12 23:59:55,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:55,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780934097] [2021-10-12 23:59:55,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:55,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:55,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:56,054 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-12 23:59:56,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:56,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780934097] [2021-10-12 23:59:56,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780934097] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:56,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314649887] [2021-10-12 23:59:56,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-12 23:59:56,055 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:56,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:56,055 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:56,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-12 23:59:56,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-10-12 23:59:56,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:56,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-12 23:59:56,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:56,585 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-12 23:59:56,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314649887] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:56,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:56,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-10-12 23:59:56,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378649061] [2021-10-12 23:59:56,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-12 23:59:56,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:56,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-12 23:59:56,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=771, Unknown=0, NotChecked=0, Total=992 [2021-10-12 23:59:56,587 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand has 32 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 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) [2021-10-12 23:59:58,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:58,033 INFO L93 Difference]: Finished difference Result 169 states and 414 transitions. [2021-10-12 23:59:58,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-10-12 23:59:58,034 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-12 23:59:58,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:58,036 INFO L225 Difference]: With dead ends: 169 [2021-10-12 23:59:58,036 INFO L226 Difference]: Without dead ends: 158 [2021-10-12 23:59:58,037 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2093 ImplicationChecksByTransitivity, 1423.3ms TimeCoverageRelationStatistics Valid=2293, Invalid=5017, Unknown=0, NotChecked=0, Total=7310 [2021-10-12 23:59:58,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-10-12 23:59:58,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 87. [2021-10-12 23:59:58,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.4767441860465116) internal successors, (213), 86 states have internal predecessors, (213), 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) [2021-10-12 23:59:58,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 213 transitions. [2021-10-12 23:59:58,042 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 213 transitions. Word has length 35 [2021-10-12 23:59:58,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:58,043 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 213 transitions. [2021-10-12 23:59:58,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 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) [2021-10-12 23:59:58,043 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 213 transitions. [2021-10-12 23:59:58,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-12 23:59:58,044 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:58,044 INFO L512 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:58,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:58,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-12 23:59:58,260 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-12 23:59:58,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:58,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1809719599, now seen corresponding path program 34 times [2021-10-12 23:59:58,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:58,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412753636] [2021-10-12 23:59:58,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:58,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:58,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:58,686 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:58,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:58,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412753636] [2021-10-12 23:59:58,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412753636] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:58,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439044014] [2021-10-12 23:59:58,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-12 23:59:58,687 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:58,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:58,689 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:58,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-12 23:59:59,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-12 23:59:59,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:59,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-12 23:59:59,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:59,254 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:59,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439044014] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:59,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:59,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-10-12 23:59:59,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077535004] [2021-10-12 23:59:59,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-12 23:59:59,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:59,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-12 23:59:59,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=820, Unknown=0, NotChecked=0, Total=1056 [2021-10-12 23:59:59,256 INFO L87 Difference]: Start difference. First operand 87 states and 213 transitions. Second operand has 33 states, 32 states have (on average 1.1875) internal successors, (38), 32 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) [2021-10-13 00:00:00,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:00,618 INFO L93 Difference]: Finished difference Result 180 states and 441 transitions. [2021-10-13 00:00:00,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-10-13 00:00:00,619 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.1875) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-13 00:00:00,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:00,620 INFO L225 Difference]: With dead ends: 180 [2021-10-13 00:00:00,620 INFO L226 Difference]: Without dead ends: 160 [2021-10-13 00:00:00,621 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1992 ImplicationChecksByTransitivity, 1471.4ms TimeCoverageRelationStatistics Valid=2315, Invalid=5167, Unknown=0, NotChecked=0, Total=7482 [2021-10-13 00:00:00,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-10-13 00:00:00,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 87. [2021-10-13 00:00:00,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.488372093023256) internal successors, (214), 86 states have internal predecessors, (214), 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) [2021-10-13 00:00:00,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 214 transitions. [2021-10-13 00:00:00,625 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 214 transitions. Word has length 35 [2021-10-13 00:00:00,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:00,626 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 214 transitions. [2021-10-13 00:00:00,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.1875) internal successors, (38), 32 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) [2021-10-13 00:00:00,626 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 214 transitions. [2021-10-13 00:00:00,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-13 00:00:00,627 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:00,627 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:00,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:00,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:00,840 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 00:00:00,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:00,841 INFO L82 PathProgramCache]: Analyzing trace with hash -674767447, now seen corresponding path program 35 times [2021-10-13 00:00:00,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:00,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426426157] [2021-10-13 00:00:00,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:00,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:00,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:01,261 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:01,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:01,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426426157] [2021-10-13 00:00:01,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426426157] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:01,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699363531] [2021-10-13 00:00:01,261 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 00:00:01,261 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:01,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:01,262 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:00:01,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-13 00:00:01,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-10-13 00:00:01,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:00:01,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-13 00:00:01,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:01,799 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:01,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699363531] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:01,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:00:01,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-10-13 00:00:01,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934262430] [2021-10-13 00:00:01,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-13 00:00:01,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:01,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-13 00:00:01,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=807, Unknown=0, NotChecked=0, Total=1056 [2021-10-13 00:00:01,801 INFO L87 Difference]: Start difference. First operand 87 states and 214 transitions. Second operand has 33 states, 32 states have (on average 1.1875) internal successors, (38), 32 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) [2021-10-13 00:00:03,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:03,206 INFO L93 Difference]: Finished difference Result 170 states and 419 transitions. [2021-10-13 00:00:03,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-10-13 00:00:03,207 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.1875) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-13 00:00:03,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:03,208 INFO L225 Difference]: With dead ends: 170 [2021-10-13 00:00:03,209 INFO L226 Difference]: Without dead ends: 155 [2021-10-13 00:00:03,210 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2294 ImplicationChecksByTransitivity, 1491.9ms TimeCoverageRelationStatistics Valid=2558, Invalid=5452, Unknown=0, NotChecked=0, Total=8010 [2021-10-13 00:00:03,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-10-13 00:00:03,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 148. [2021-10-13 00:00:03,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.496598639455782) internal successors, (367), 147 states have internal predecessors, (367), 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) [2021-10-13 00:00:03,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 367 transitions. [2021-10-13 00:00:03,216 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 367 transitions. Word has length 36 [2021-10-13 00:00:03,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:03,217 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 367 transitions. [2021-10-13 00:00:03,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.1875) internal successors, (38), 32 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) [2021-10-13 00:00:03,217 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 367 transitions. [2021-10-13 00:00:03,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-13 00:00:03,218 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:03,218 INFO L512 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:03,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:03,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-13 00:00:03,438 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 00:00:03,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:03,439 INFO L82 PathProgramCache]: Analyzing trace with hash 557056623, now seen corresponding path program 36 times [2021-10-13 00:00:03,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:03,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955755327] [2021-10-13 00:00:03,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:03,439 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:03,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:03,831 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:03,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:03,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955755327] [2021-10-13 00:00:03,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955755327] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:03,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690190710] [2021-10-13 00:00:03,832 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 00:00:03,832 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:03,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:03,833 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:00:03,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-13 00:00:04,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-10-13 00:00:04,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:00:04,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-13 00:00:04,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:04,593 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:04,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690190710] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:04,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:00:04,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-10-13 00:00:04,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218383233] [2021-10-13 00:00:04,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-13 00:00:04,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:04,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-13 00:00:04,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2021-10-13 00:00:04,595 INFO L87 Difference]: Start difference. First operand 148 states and 367 transitions. Second operand has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:05,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:05,984 INFO L93 Difference]: Finished difference Result 167 states and 413 transitions. [2021-10-13 00:00:05,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-10-13 00:00:05,984 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-13 00:00:05,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:05,985 INFO L225 Difference]: With dead ends: 167 [2021-10-13 00:00:05,985 INFO L226 Difference]: Without dead ends: 155 [2021-10-13 00:00:05,986 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2374 ImplicationChecksByTransitivity, 1441.0ms TimeCoverageRelationStatistics Valid=2404, Invalid=6338, Unknown=0, NotChecked=0, Total=8742 [2021-10-13 00:00:05,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-10-13 00:00:05,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2021-10-13 00:00:05,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.4966887417218544) internal successors, (377), 151 states have internal predecessors, (377), 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) [2021-10-13 00:00:05,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 377 transitions. [2021-10-13 00:00:05,990 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 377 transitions. Word has length 37 [2021-10-13 00:00:05,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:05,991 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 377 transitions. [2021-10-13 00:00:05,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:05,991 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 377 transitions. [2021-10-13 00:00:05,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-13 00:00:05,992 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:05,992 INFO L512 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:06,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-10-13 00:00:06,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-13 00:00:06,213 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 00:00:06,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:06,213 INFO L82 PathProgramCache]: Analyzing trace with hash -320870163, now seen corresponding path program 37 times [2021-10-13 00:00:06,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:06,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553418902] [2021-10-13 00:00:06,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:06,215 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:06,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:06,698 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:06,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:06,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553418902] [2021-10-13 00:00:06,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553418902] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:06,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378400022] [2021-10-13 00:00:06,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 00:00:06,699 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:06,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:06,699 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:00:06,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-13 00:00:07,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:07,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-13 00:00:07,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:07,314 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:07,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378400022] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:07,314 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:00:07,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-10-13 00:00:07,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038032568] [2021-10-13 00:00:07,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-13 00:00:07,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:07,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-13 00:00:07,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2021-10-13 00:00:07,316 INFO L87 Difference]: Start difference. First operand 152 states and 377 transitions. Second operand has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:08,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:08,744 INFO L93 Difference]: Finished difference Result 173 states and 427 transitions. [2021-10-13 00:00:08,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-10-13 00:00:08,744 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-13 00:00:08,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:08,746 INFO L225 Difference]: With dead ends: 173 [2021-10-13 00:00:08,746 INFO L226 Difference]: Without dead ends: 158 [2021-10-13 00:00:08,746 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2184 ImplicationChecksByTransitivity, 1552.3ms TimeCoverageRelationStatistics Valid=2581, Invalid=5609, Unknown=0, NotChecked=0, Total=8190 [2021-10-13 00:00:08,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-10-13 00:00:08,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 90. [2021-10-13 00:00:08,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.4831460674157304) internal successors, (221), 89 states have internal predecessors, (221), 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) [2021-10-13 00:00:08,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 221 transitions. [2021-10-13 00:00:08,750 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 221 transitions. Word has length 37 [2021-10-13 00:00:08,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:08,750 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 221 transitions. [2021-10-13 00:00:08,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:08,751 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 221 transitions. [2021-10-13 00:00:08,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-13 00:00:08,751 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:08,752 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:08,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-10-13 00:00:08,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-13 00:00:08,961 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 00:00:08,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:08,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1357029461, now seen corresponding path program 38 times [2021-10-13 00:00:08,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:08,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507068388] [2021-10-13 00:00:08,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:08,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:08,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:09,449 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:09,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:09,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507068388] [2021-10-13 00:00:09,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507068388] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:09,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941312659] [2021-10-13 00:00:09,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:00:09,450 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:09,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:09,453 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:00:09,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-13 00:00:09,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:00:09,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:00:09,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-13 00:00:09,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:10,119 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:10,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941312659] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:10,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:00:10,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 34 [2021-10-13 00:00:10,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680585963] [2021-10-13 00:00:10,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-13 00:00:10,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:10,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-13 00:00:10,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=978, Unknown=0, NotChecked=0, Total=1260 [2021-10-13 00:00:10,121 INFO L87 Difference]: Start difference. First operand 90 states and 221 transitions. Second operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:11,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:11,700 INFO L93 Difference]: Finished difference Result 186 states and 455 transitions. [2021-10-13 00:00:11,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-10-13 00:00:11,701 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-13 00:00:11,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:11,703 INFO L225 Difference]: With dead ends: 186 [2021-10-13 00:00:11,703 INFO L226 Difference]: Without dead ends: 172 [2021-10-13 00:00:11,704 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2428 ImplicationChecksByTransitivity, 1650.3ms TimeCoverageRelationStatistics Valid=2493, Invalid=6819, Unknown=0, NotChecked=0, Total=9312 [2021-10-13 00:00:11,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-10-13 00:00:11,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2021-10-13 00:00:11,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.616) internal successors, (327), 125 states have internal predecessors, (327), 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) [2021-10-13 00:00:11,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 327 transitions. [2021-10-13 00:00:11,708 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 327 transitions. Word has length 38 [2021-10-13 00:00:11,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:11,709 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 327 transitions. [2021-10-13 00:00:11,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:11,709 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 327 transitions. [2021-10-13 00:00:11,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-13 00:00:11,710 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:11,710 INFO L512 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:11,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-10-13 00:00:11,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-13 00:00:11,936 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 00:00:11,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:11,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1539204879, now seen corresponding path program 39 times [2021-10-13 00:00:11,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:11,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999442828] [2021-10-13 00:00:11,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:11,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:11,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:12,329 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:12,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:12,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999442828] [2021-10-13 00:00:12,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999442828] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:12,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870693253] [2021-10-13 00:00:12,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:00:12,329 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:12,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:12,330 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:00:12,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-13 00:00:12,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-10-13 00:00:12,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:00:12,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-13 00:00:12,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:12,931 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:12,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870693253] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:12,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:00:12,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-10-13 00:00:12,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558933697] [2021-10-13 00:00:12,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-13 00:00:12,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:12,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-13 00:00:12,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=964, Unknown=0, NotChecked=0, Total=1260 [2021-10-13 00:00:12,933 INFO L87 Difference]: Start difference. First operand 126 states and 327 transitions. Second operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:14,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:14,646 INFO L93 Difference]: Finished difference Result 176 states and 435 transitions. [2021-10-13 00:00:14,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-10-13 00:00:14,646 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-10-13 00:00:14,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:14,648 INFO L225 Difference]: With dead ends: 176 [2021-10-13 00:00:14,649 INFO L226 Difference]: Without dead ends: 164 [2021-10-13 00:00:14,650 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2703 ImplicationChecksByTransitivity, 1704.5ms TimeCoverageRelationStatistics Valid=2716, Invalid=7184, Unknown=0, NotChecked=0, Total=9900 [2021-10-13 00:00:14,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-10-13 00:00:14,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 129. [2021-10-13 00:00:14,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.6171875) internal successors, (335), 128 states have internal predecessors, (335), 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) [2021-10-13 00:00:14,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 335 transitions. [2021-10-13 00:00:14,656 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 335 transitions. Word has length 39 [2021-10-13 00:00:14,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:14,656 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 335 transitions. [2021-10-13 00:00:14,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:14,656 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 335 transitions. [2021-10-13 00:00:14,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-13 00:00:14,657 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:14,658 INFO L512 BasicCegarLoop]: trace histogram [17, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:14,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:14,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:14,873 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 00:00:14,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:14,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1565036459, now seen corresponding path program 40 times [2021-10-13 00:00:14,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:14,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985206757] [2021-10-13 00:00:14,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:14,874 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:14,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:15,305 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:00:15,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:15,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985206757] [2021-10-13 00:00:15,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985206757] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:15,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505582955] [2021-10-13 00:00:15,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:00:15,305 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:15,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:15,307 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:00:15,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-13 00:00:15,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:00:15,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:00:15,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-13 00:00:15,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:16,099 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:00:16,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505582955] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:16,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:00:16,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2021-10-13 00:00:16,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975860456] [2021-10-13 00:00:16,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-13 00:00:16,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:16,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-13 00:00:16,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1032, Unknown=0, NotChecked=0, Total=1332 [2021-10-13 00:00:16,101 INFO L87 Difference]: Start difference. First operand 129 states and 335 transitions. Second operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:17,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:17,701 INFO L93 Difference]: Finished difference Result 188 states and 462 transitions. [2021-10-13 00:00:17,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-10-13 00:00:17,702 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-10-13 00:00:17,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:17,703 INFO L225 Difference]: With dead ends: 188 [2021-10-13 00:00:17,704 INFO L226 Difference]: Without dead ends: 177 [2021-10-13 00:00:17,705 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2628 ImplicationChecksByTransitivity, 1710.6ms TimeCoverageRelationStatistics Valid=2997, Invalid=6705, Unknown=0, NotChecked=0, Total=9702 [2021-10-13 00:00:17,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-10-13 00:00:17,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 164. [2021-10-13 00:00:17,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.496932515337423) internal successors, (407), 163 states have internal predecessors, (407), 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) [2021-10-13 00:00:17,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2021-10-13 00:00:17,711 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 40 [2021-10-13 00:00:17,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:17,712 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2021-10-13 00:00:17,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:17,712 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2021-10-13 00:00:17,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-13 00:00:17,713 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:17,713 INFO L512 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:17,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:17,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:17,928 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 00:00:17,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:17,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1706846477, now seen corresponding path program 41 times [2021-10-13 00:00:17,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:17,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728415284] [2021-10-13 00:00:17,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:17,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:17,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:18,491 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:18,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:18,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728415284] [2021-10-13 00:00:18,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728415284] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:18,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849843419] [2021-10-13 00:00:18,491 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 00:00:18,492 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:18,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:18,492 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:00:18,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-13 00:00:18,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-10-13 00:00:18,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:00:18,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-13 00:00:18,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:19,099 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:19,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849843419] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:19,100 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:00:19,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-10-13 00:00:19,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482967313] [2021-10-13 00:00:19,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-13 00:00:19,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:19,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-13 00:00:19,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2021-10-13 00:00:19,101 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand has 38 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:20,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:20,910 INFO L93 Difference]: Finished difference Result 183 states and 453 transitions. [2021-10-13 00:00:20,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-10-13 00:00:20,911 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-10-13 00:00:20,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:20,912 INFO L225 Difference]: With dead ends: 183 [2021-10-13 00:00:20,912 INFO L226 Difference]: Without dead ends: 171 [2021-10-13 00:00:20,913 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3173 ImplicationChecksByTransitivity, 1966.5ms TimeCoverageRelationStatistics Valid=3410, Invalid=7720, Unknown=0, NotChecked=0, Total=11130 [2021-10-13 00:00:20,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-10-13 00:00:20,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 168. [2021-10-13 00:00:20,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.497005988023952) internal successors, (417), 167 states have internal predecessors, (417), 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) [2021-10-13 00:00:20,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 417 transitions. [2021-10-13 00:00:20,917 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 417 transitions. Word has length 41 [2021-10-13 00:00:20,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:20,918 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 417 transitions. [2021-10-13 00:00:20,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:20,918 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 417 transitions. [2021-10-13 00:00:20,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-13 00:00:20,919 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:20,919 INFO L512 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:20,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:21,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-10-13 00:00:21,141 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 00:00:21,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:21,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1271558633, now seen corresponding path program 42 times [2021-10-13 00:00:21,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:21,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986229383] [2021-10-13 00:00:21,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:21,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:21,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:21,663 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:21,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:21,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986229383] [2021-10-13 00:00:21,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986229383] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:21,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953701884] [2021-10-13 00:00:21,664 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 00:00:21,664 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:21,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:21,672 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:00:21,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-13 00:00:22,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-10-13 00:00:22,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:00:22,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-13 00:00:22,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:22,406 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:22,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953701884] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:22,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:00:22,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-10-13 00:00:22,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538375026] [2021-10-13 00:00:22,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-13 00:00:22,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:22,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-13 00:00:22,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=1147, Unknown=0, NotChecked=0, Total=1482 [2021-10-13 00:00:22,409 INFO L87 Difference]: Start difference. First operand 168 states and 417 transitions. Second operand has 39 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:24,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:24,219 INFO L93 Difference]: Finished difference Result 205 states and 504 transitions. [2021-10-13 00:00:24,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-10-13 00:00:24,220 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-10-13 00:00:24,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:24,222 INFO L225 Difference]: With dead ends: 205 [2021-10-13 00:00:24,222 INFO L226 Difference]: Without dead ends: 185 [2021-10-13 00:00:24,223 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2979 ImplicationChecksByTransitivity, 1950.8ms TimeCoverageRelationStatistics Valid=3371, Invalid=7549, Unknown=0, NotChecked=0, Total=10920 [2021-10-13 00:00:24,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-10-13 00:00:24,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 172. [2021-10-13 00:00:24,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.497076023391813) internal successors, (427), 171 states have internal predecessors, (427), 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) [2021-10-13 00:00:24,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 427 transitions. [2021-10-13 00:00:24,229 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 427 transitions. Word has length 41 [2021-10-13 00:00:24,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:24,229 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 427 transitions. [2021-10-13 00:00:24,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:24,230 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 427 transitions. [2021-10-13 00:00:24,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-13 00:00:24,231 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:24,231 INFO L512 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:24,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-10-13 00:00:24,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:24,445 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 00:00:24,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:24,446 INFO L82 PathProgramCache]: Analyzing trace with hash 398335093, now seen corresponding path program 43 times [2021-10-13 00:00:24,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:24,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735008571] [2021-10-13 00:00:24,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:24,446 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:24,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:25,031 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:25,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:25,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735008571] [2021-10-13 00:00:25,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735008571] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:25,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367253423] [2021-10-13 00:00:25,032 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 00:00:25,032 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:25,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:25,034 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:00:25,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-13 00:00:25,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:25,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-13 00:00:25,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:25,913 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:25,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367253423] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:25,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:00:25,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-10-13 00:00:25,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210762928] [2021-10-13 00:00:25,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-13 00:00:25,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:25,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-13 00:00:25,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=1192, Unknown=0, NotChecked=0, Total=1560 [2021-10-13 00:00:25,916 INFO L87 Difference]: Start difference. First operand 172 states and 427 transitions. Second operand has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 states have internal predecessors, (45), 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) [2021-10-13 00:00:27,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:27,897 INFO L93 Difference]: Finished difference Result 191 states and 473 transitions. [2021-10-13 00:00:27,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-10-13 00:00:27,898 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 states have internal predecessors, (45), 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 43 [2021-10-13 00:00:27,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:27,899 INFO L225 Difference]: With dead ends: 191 [2021-10-13 00:00:27,899 INFO L226 Difference]: Without dead ends: 179 [2021-10-13 00:00:27,900 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3560 ImplicationChecksByTransitivity, 2169.3ms TimeCoverageRelationStatistics Valid=3808, Invalid=8624, Unknown=0, NotChecked=0, Total=12432 [2021-10-13 00:00:27,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-10-13 00:00:27,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 176. [2021-10-13 00:00:27,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.4971428571428573) internal successors, (437), 175 states have internal predecessors, (437), 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) [2021-10-13 00:00:27,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 437 transitions. [2021-10-13 00:00:27,905 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 437 transitions. Word has length 43 [2021-10-13 00:00:27,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:27,906 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 437 transitions. [2021-10-13 00:00:27,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 states have internal predecessors, (45), 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) [2021-10-13 00:00:27,906 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 437 transitions. [2021-10-13 00:00:27,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-13 00:00:27,907 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:27,907 INFO L512 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:27,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-10-13 00:00:28,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:28,120 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 00:00:28,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:28,121 INFO L82 PathProgramCache]: Analyzing trace with hash -2097482969, now seen corresponding path program 44 times [2021-10-13 00:00:28,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:28,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205006714] [2021-10-13 00:00:28,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:28,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:28,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:28,791 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:28,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:28,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205006714] [2021-10-13 00:00:28,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205006714] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:28,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828795535] [2021-10-13 00:00:28,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:00:28,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:28,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:28,793 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:00:28,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-13 00:00:29,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:00:29,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:00:29,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-13 00:00:29,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:29,689 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:29,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828795535] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:29,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:00:29,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-10-13 00:00:29,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338851657] [2021-10-13 00:00:29,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-10-13 00:00:29,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:29,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-10-13 00:00:29,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=1268, Unknown=0, NotChecked=0, Total=1640 [2021-10-13 00:00:29,691 INFO L87 Difference]: Start difference. First operand 176 states and 437 transitions. Second operand has 41 states, 40 states have (on average 1.15) internal successors, (46), 40 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) [2021-10-13 00:00:31,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:31,551 INFO L93 Difference]: Finished difference Result 213 states and 524 transitions. [2021-10-13 00:00:31,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-10-13 00:00:31,552 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.15) internal successors, (46), 40 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 43 [2021-10-13 00:00:31,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:31,553 INFO L225 Difference]: With dead ends: 213 [2021-10-13 00:00:31,553 INFO L226 Difference]: Without dead ends: 193 [2021-10-13 00:00:31,553 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3352 ImplicationChecksByTransitivity, 2116.0ms TimeCoverageRelationStatistics Valid=3767, Invalid=8443, Unknown=0, NotChecked=0, Total=12210 [2021-10-13 00:00:31,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-10-13 00:00:31,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 180. [2021-10-13 00:00:31,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.4972067039106145) internal successors, (447), 179 states have internal predecessors, (447), 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) [2021-10-13 00:00:31,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 447 transitions. [2021-10-13 00:00:31,558 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 447 transitions. Word has length 43 [2021-10-13 00:00:31,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:31,559 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 447 transitions. [2021-10-13 00:00:31,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.15) internal successors, (46), 40 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) [2021-10-13 00:00:31,559 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 447 transitions. [2021-10-13 00:00:31,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-13 00:00:31,560 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:31,560 INFO L512 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:31,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:31,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-10-13 00:00:31,784 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 00:00:31,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:31,785 INFO L82 PathProgramCache]: Analyzing trace with hash 548227447, now seen corresponding path program 45 times [2021-10-13 00:00:31,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:31,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679459493] [2021-10-13 00:00:31,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:31,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:31,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:32,334 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:32,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:32,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679459493] [2021-10-13 00:00:32,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679459493] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:32,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933909511] [2021-10-13 00:00:32,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:00:32,334 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:32,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:32,335 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:00:32,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-13 00:00:32,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-10-13 00:00:32,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:00:32,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-13 00:00:32,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:33,065 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:33,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933909511] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:33,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:00:33,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-10-13 00:00:33,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594397664] [2021-10-13 00:00:33,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-10-13 00:00:33,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:33,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-10-13 00:00:33,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=1315, Unknown=0, NotChecked=0, Total=1722 [2021-10-13 00:00:33,067 INFO L87 Difference]: Start difference. First operand 180 states and 447 transitions. Second operand has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 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) [2021-10-13 00:00:34,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:34,975 INFO L93 Difference]: Finished difference Result 199 states and 493 transitions. [2021-10-13 00:00:34,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-10-13 00:00:34,976 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 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 45 [2021-10-13 00:00:34,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:34,977 INFO L225 Difference]: With dead ends: 199 [2021-10-13 00:00:34,977 INFO L226 Difference]: Without dead ends: 187 [2021-10-13 00:00:34,978 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3816 ImplicationChecksByTransitivity, 2008.9ms TimeCoverageRelationStatistics Valid=3766, Invalid=10040, Unknown=0, NotChecked=0, Total=13806 [2021-10-13 00:00:34,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-10-13 00:00:34,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 184. [2021-10-13 00:00:34,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.4972677595628414) internal successors, (457), 183 states have internal predecessors, (457), 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) [2021-10-13 00:00:34,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 457 transitions. [2021-10-13 00:00:34,984 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 457 transitions. Word has length 45 [2021-10-13 00:00:34,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:34,984 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 457 transitions. [2021-10-13 00:00:34,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 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) [2021-10-13 00:00:34,984 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 457 transitions. [2021-10-13 00:00:34,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-13 00:00:34,985 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:34,985 INFO L512 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:35,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:35,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-10-13 00:00:35,192 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 00:00:35,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:35,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1341121307, now seen corresponding path program 46 times [2021-10-13 00:00:35,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:35,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534071608] [2021-10-13 00:00:35,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:35,194 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:35,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:35,758 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:35,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:35,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534071608] [2021-10-13 00:00:35,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534071608] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:35,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852271689] [2021-10-13 00:00:35,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:00:35,759 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:35,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:35,764 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:00:35,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-10-13 00:00:36,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:00:36,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:00:36,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-13 00:00:36,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:36,606 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:36,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852271689] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:36,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:00:36,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-10-13 00:00:36,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822130538] [2021-10-13 00:00:36,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-10-13 00:00:36,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:36,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-10-13 00:00:36,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722 [2021-10-13 00:00:36,608 INFO L87 Difference]: Start difference. First operand 184 states and 457 transitions. Second operand has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 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) [2021-10-13 00:00:38,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:38,596 INFO L93 Difference]: Finished difference Result 205 states and 507 transitions. [2021-10-13 00:00:38,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-10-13 00:00:38,596 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 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 45 [2021-10-13 00:00:38,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:38,597 INFO L225 Difference]: With dead ends: 205 [2021-10-13 00:00:38,597 INFO L226 Difference]: Without dead ends: 190 [2021-10-13 00:00:38,598 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3600 ImplicationChecksByTransitivity, 2137.4ms TimeCoverageRelationStatistics Valid=4105, Invalid=9005, Unknown=0, NotChecked=0, Total=13110 [2021-10-13 00:00:38,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-10-13 00:00:38,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 106. [2021-10-13 00:00:38,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.4857142857142858) internal successors, (261), 105 states have internal predecessors, (261), 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) [2021-10-13 00:00:38,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 261 transitions. [2021-10-13 00:00:38,602 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 261 transitions. Word has length 45 [2021-10-13 00:00:38,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:38,602 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 261 transitions. [2021-10-13 00:00:38,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 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) [2021-10-13 00:00:38,603 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 261 transitions. [2021-10-13 00:00:38,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-13 00:00:38,603 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:38,603 INFO L512 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:38,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:38,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-10-13 00:00:38,828 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 00:00:38,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:38,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1374923443, now seen corresponding path program 47 times [2021-10-13 00:00:38,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:38,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850869258] [2021-10-13 00:00:38,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:38,829 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:38,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:39,417 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:39,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:39,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850869258] [2021-10-13 00:00:39,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850869258] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:39,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620562623] [2021-10-13 00:00:39,418 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 00:00:39,418 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:39,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:39,419 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:00:39,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-10-13 00:00:39,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-10-13 00:00:39,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:00:39,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-13 00:00:39,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:40,204 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:40,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620562623] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:40,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:00:40,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 42 [2021-10-13 00:00:40,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389006813] [2021-10-13 00:00:40,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-13 00:00:40,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:40,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-13 00:00:40,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=430, Invalid=1462, Unknown=0, NotChecked=0, Total=1892 [2021-10-13 00:00:40,205 INFO L87 Difference]: Start difference. First operand 106 states and 261 transitions. Second operand has 44 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 43 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:42,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:42,417 INFO L93 Difference]: Finished difference Result 218 states and 535 transitions. [2021-10-13 00:00:42,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-10-13 00:00:42,417 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 43 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-10-13 00:00:42,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:42,418 INFO L225 Difference]: With dead ends: 218 [2021-10-13 00:00:42,419 INFO L226 Difference]: Without dead ends: 204 [2021-10-13 00:00:42,420 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4216 ImplicationChecksByTransitivity, 2401.7ms TimeCoverageRelationStatistics Valid=4535, Invalid=10471, Unknown=0, NotChecked=0, Total=15006 [2021-10-13 00:00:42,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-10-13 00:00:42,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 150. [2021-10-13 00:00:42,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.6241610738255035) internal successors, (391), 149 states have internal predecessors, (391), 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) [2021-10-13 00:00:42,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 391 transitions. [2021-10-13 00:00:42,422 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 391 transitions. Word has length 46 [2021-10-13 00:00:42,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:42,423 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 391 transitions. [2021-10-13 00:00:42,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 43 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:42,423 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 391 transitions. [2021-10-13 00:00:42,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-13 00:00:42,423 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:42,424 INFO L512 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:42,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-10-13 00:00:42,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:42,624 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 00:00:42,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:42,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1434108423, now seen corresponding path program 48 times [2021-10-13 00:00:42,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:42,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772140021] [2021-10-13 00:00:42,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:42,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:42,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:43,169 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:43,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:43,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772140021] [2021-10-13 00:00:43,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772140021] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:43,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702630725] [2021-10-13 00:00:43,169 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 00:00:43,170 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:43,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:43,170 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:00:43,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-10-13 00:00:43,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-10-13 00:00:43,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:00:43,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 46 conjunts are in the unsatisfiable core [2021-10-13 00:00:43,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:44,015 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:44,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702630725] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:44,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:00:44,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-10-13 00:00:44,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584857189] [2021-10-13 00:00:44,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-13 00:00:44,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:44,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-13 00:00:44,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-10-13 00:00:44,017 INFO L87 Difference]: Start difference. First operand 150 states and 391 transitions. Second operand has 44 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 43 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:45,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:45,989 INFO L93 Difference]: Finished difference Result 208 states and 515 transitions. [2021-10-13 00:00:45,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-10-13 00:00:45,989 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 43 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-10-13 00:00:45,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:45,990 INFO L225 Difference]: With dead ends: 208 [2021-10-13 00:00:45,991 INFO L226 Difference]: Without dead ends: 196 [2021-10-13 00:00:45,991 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4229 ImplicationChecksByTransitivity, 2102.3ms TimeCoverageRelationStatistics Valid=4154, Invalid=11098, Unknown=0, NotChecked=0, Total=15252 [2021-10-13 00:00:45,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-10-13 00:00:45,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 153. [2021-10-13 00:00:45,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.625) internal successors, (399), 152 states have internal predecessors, (399), 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) [2021-10-13 00:00:45,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 399 transitions. [2021-10-13 00:00:45,995 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 399 transitions. Word has length 47 [2021-10-13 00:00:45,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:45,996 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 399 transitions. [2021-10-13 00:00:45,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 43 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:45,996 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 399 transitions. [2021-10-13 00:00:45,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-10-13 00:00:45,997 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:45,997 INFO L512 BasicCegarLoop]: trace histogram [21, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:46,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:46,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:46,211 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 00:00:46,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:46,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1548207949, now seen corresponding path program 49 times [2021-10-13 00:00:46,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:46,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857644037] [2021-10-13 00:00:46,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:46,212 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:46,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:46,455 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 361 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:46,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:46,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857644037] [2021-10-13 00:00:46,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857644037] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:46,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618332916] [2021-10-13 00:00:46,455 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 00:00:46,455 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:46,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:46,456 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:00:46,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-10-13 00:00:47,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:47,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 00:00:47,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:47,206 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 381 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:47,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618332916] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:47,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:00:47,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 24 [2021-10-13 00:00:47,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684875763] [2021-10-13 00:00:47,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 00:00:47,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:47,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 00:00:47,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2021-10-13 00:00:47,208 INFO L87 Difference]: Start difference. First operand 153 states and 399 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:47,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:47,278 INFO L93 Difference]: Finished difference Result 1370 states and 3483 transitions. [2021-10-13 00:00:47,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 00:00:47,279 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-10-13 00:00:47,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:47,280 INFO L225 Difference]: With dead ends: 1370 [2021-10-13 00:00:47,281 INFO L226 Difference]: Without dead ends: 151 [2021-10-13 00:00:47,281 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 179.5ms TimeCoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2021-10-13 00:00:47,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-10-13 00:00:47,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 110. [2021-10-13 00:00:47,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.0275229357798166) internal successors, (221), 109 states have internal predecessors, (221), 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) [2021-10-13 00:00:47,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 221 transitions. [2021-10-13 00:00:47,285 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 221 transitions. Word has length 48 [2021-10-13 00:00:47,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:47,285 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 221 transitions. [2021-10-13 00:00:47,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:47,286 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 221 transitions. [2021-10-13 00:00:47,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-10-13 00:00:47,287 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:47,287 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:47,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:47,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:47,512 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 00:00:47,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:47,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1548206027, now seen corresponding path program 50 times [2021-10-13 00:00:47,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:47,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194822060] [2021-10-13 00:00:47,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:47,513 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:47,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:48,098 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:48,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:48,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194822060] [2021-10-13 00:00:48,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194822060] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:48,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547502766] [2021-10-13 00:00:48,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:00:48,099 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:48,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:48,100 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:00:48,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-10-13 00:00:48,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:00:48,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:00:48,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-13 00:00:48,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:48,907 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:48,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547502766] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:48,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:00:48,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-10-13 00:00:48,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597129608] [2021-10-13 00:00:48,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-10-13 00:00:48,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:48,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-10-13 00:00:48,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=1511, Unknown=0, NotChecked=0, Total=1980 [2021-10-13 00:00:48,910 INFO L87 Difference]: Start difference. First operand 110 states and 221 transitions. Second operand has 45 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:50,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:50,911 INFO L93 Difference]: Finished difference Result 204 states and 410 transitions. [2021-10-13 00:00:50,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-10-13 00:00:50,913 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-10-13 00:00:50,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:50,914 INFO L225 Difference]: With dead ends: 204 [2021-10-13 00:00:50,914 INFO L226 Difference]: Without dead ends: 112 [2021-10-13 00:00:50,915 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4050 ImplicationChecksByTransitivity, 2185.4ms TimeCoverageRelationStatistics Valid=4135, Invalid=11117, Unknown=0, NotChecked=0, Total=15252 [2021-10-13 00:00:50,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-10-13 00:00:50,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2021-10-13 00:00:50,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.018348623853211) internal successors, (220), 109 states have internal predecessors, (220), 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) [2021-10-13 00:00:50,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 220 transitions. [2021-10-13 00:00:50,917 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 220 transitions. Word has length 48 [2021-10-13 00:00:50,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:50,917 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 220 transitions. [2021-10-13 00:00:50,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:50,917 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 220 transitions. [2021-10-13 00:00:50,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-13 00:00:50,917 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:50,917 INFO L512 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:50,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:51,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-10-13 00:00:51,123 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 00:00:51,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:51,123 INFO L82 PathProgramCache]: Analyzing trace with hash 506599931, now seen corresponding path program 51 times [2021-10-13 00:00:51,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:51,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381013898] [2021-10-13 00:00:51,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:51,124 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:51,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:51,378 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 380 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:51,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:51,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381013898] [2021-10-13 00:00:51,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381013898] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:51,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283990407] [2021-10-13 00:00:51,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:00:51,379 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:51,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:51,384 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:00:51,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-10-13 00:00:52,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-10-13 00:00:52,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:00:52,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 00:00:52,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:52,198 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 400 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:52,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283990407] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:52,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:00:52,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 24 [2021-10-13 00:00:52,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22670843] [2021-10-13 00:00:52,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 00:00:52,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:52,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 00:00:52,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2021-10-13 00:00:52,199 INFO L87 Difference]: Start difference. First operand 110 states and 220 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:52,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:52,242 INFO L93 Difference]: Finished difference Result 896 states and 1725 transitions. [2021-10-13 00:00:52,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 00:00:52,242 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-10-13 00:00:52,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:52,242 INFO L225 Difference]: With dead ends: 896 [2021-10-13 00:00:52,242 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 00:00:52,242 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 190.3ms TimeCoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2021-10-13 00:00:52,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 00:00:52,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 00:00:52,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-10-13 00:00:52,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 00:00:52,243 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 49 [2021-10-13 00:00:52,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:52,243 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 00:00:52,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:52,243 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 00:00:52,243 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 00:00:52,245 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 00:00:52,246 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-13 00:00:52,246 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-13 00:00:52,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-10-13 00:00:52,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:52,452 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-13 00:00:52,452 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 00:00:52,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 12:00:52 BasicIcfg [2021-10-13 00:00:52,454 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 00:00:52,455 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 00:00:52,455 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 00:00:52,455 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 00:00:52,455 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 11:59:07" (3/4) ... [2021-10-13 00:00:52,458 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 00:00:52,465 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2021-10-13 00:00:52,465 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2021-10-13 00:00:52,469 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-10-13 00:00:52,469 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-13 00:00:52,469 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-13 00:00:52,469 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 00:00:52,492 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/witness.graphml [2021-10-13 00:00:52,492 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 00:00:52,494 INFO L168 Benchmark]: Toolchain (without parser) took 106416.05 ms. Allocated memory was 86.0 MB in the beginning and 327.2 MB in the end (delta: 241.2 MB). Free memory was 46.7 MB in the beginning and 100.2 MB in the end (delta: -53.5 MB). Peak memory consumption was 189.6 MB. Max. memory is 16.1 GB. [2021-10-13 00:00:52,494 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 86.0 MB. Free memory is still 64.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:00:52,495 INFO L168 Benchmark]: CACSL2BoogieTranslator took 492.50 ms. Allocated memory was 86.0 MB in the beginning and 123.7 MB in the end (delta: 37.7 MB). Free memory was 46.4 MB in the beginning and 92.2 MB in the end (delta: -45.8 MB). Peak memory consumption was 8.8 MB. Max. memory is 16.1 GB. [2021-10-13 00:00:52,495 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.83 ms. Allocated memory is still 123.7 MB. Free memory was 91.7 MB in the beginning and 90.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:00:52,495 INFO L168 Benchmark]: Boogie Preprocessor took 25.75 ms. Allocated memory is still 123.7 MB. Free memory was 90.1 MB in the beginning and 88.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:00:52,496 INFO L168 Benchmark]: RCFGBuilder took 449.82 ms. Allocated memory is still 123.7 MB. Free memory was 88.6 MB in the beginning and 77.5 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 00:00:52,496 INFO L168 Benchmark]: TraceAbstraction took 105361.93 ms. Allocated memory was 123.7 MB in the beginning and 327.2 MB in the end (delta: 203.4 MB). Free memory was 77.0 MB in the beginning and 103.3 MB in the end (delta: -26.3 MB). Peak memory consumption was 178.7 MB. Max. memory is 16.1 GB. [2021-10-13 00:00:52,496 INFO L168 Benchmark]: Witness Printer took 37.81 ms. Allocated memory is still 327.2 MB. Free memory was 103.3 MB in the beginning and 100.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 00:00:52,498 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 86.0 MB. Free memory is still 64.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 492.50 ms. Allocated memory was 86.0 MB in the beginning and 123.7 MB in the end (delta: 37.7 MB). Free memory was 46.4 MB in the beginning and 92.2 MB in the end (delta: -45.8 MB). Peak memory consumption was 8.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.83 ms. Allocated memory is still 123.7 MB. Free memory was 91.7 MB in the beginning and 90.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.75 ms. Allocated memory is still 123.7 MB. Free memory was 90.1 MB in the beginning and 88.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 449.82 ms. Allocated memory is still 123.7 MB. Free memory was 88.6 MB in the beginning and 77.5 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 105361.93 ms. Allocated memory was 123.7 MB in the beginning and 327.2 MB in the end (delta: 203.4 MB). Free memory was 77.0 MB in the beginning and 103.3 MB in the end (delta: -26.3 MB). Peak memory consumption was 178.7 MB. Max. memory is 16.1 GB. * Witness Printer took 37.81 ms. Allocated memory is still 327.2 MB. Free memory was 103.3 MB in the beginning and 100.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3473.0ms, 68 PlacesBefore, 20 PlacesAfterwards, 66 TransitionsBefore, 15 TransitionsAfterwards, 1078 CoEnabledTransitionPairs, 6 FixpointIterations, 18 TrivialSequentialCompositions, 31 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 3 ChoiceCompositions, 58 TotalNumberOfCompositions, 1010 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 867, positive: 842, positive conditional: 0, positive unconditional: 842, negative: 25, negative conditional: 0, negative unconditional: 25, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 710, positive: 695, positive conditional: 0, positive unconditional: 695, negative: 15, negative conditional: 0, negative unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 710, positive: 695, positive conditional: 0, positive unconditional: 695, negative: 15, negative conditional: 0, negative unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 15, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 15, negative conditional: 0, negative unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 35, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 35, negative conditional: 0, negative unconditional: 35, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 867, positive: 147, positive conditional: 0, positive unconditional: 147, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 710, unknown conditional: 0, unknown unconditional: 710] , Statistics on independence cache: Total cache size (in pairs): 16, Positive cache size: 13, Positive conditional cache size: 0, Positive unconditional cache size: 13, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 722]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 105213.0ms, OverallIterations: 53, TraceHistogramMax: 21, EmptinessCheckTime: 61.6ms, AutomataDifference: 50175.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 3543.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1027 SDtfs, 9173 SDslu, 3881 SDs, 0 SdLazy, 7602 SolverSat, 8204 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7444.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4553 GetRequests, 1336 SyntacticMatches, 0 SemanticMatches, 3217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72617 ImplicationChecksByTransitivity, 51316.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=184occurred in iteration=47, InterpolantAutomatonStates: 2280, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 350.1ms AutomataMinimizationTime, 53 MinimizatonAttempts, 1389 StatesRemovedByMinimization, 51 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 638.1ms SsaConstructionTime, 2263.5ms SatisfiabilityAnalysisTime, 22524.2ms InterpolantComputationTime, 2948 NumberOfCodeBlocks, 2948 NumberOfCodeBlocksAsserted, 367 NumberOfCheckSat, 2846 ConstructedInterpolants, 0 QuantifiedInterpolants, 9376 SizeOfPredicates, 976 NumberOfNonLiveVariables, 9931 ConjunctsInSsa, 1315 ConjunctsInUnsatCore, 102 InterpolantComputations, 6 PerfectInterpolantSequences, 1538/13634 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-13 00:00:52,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a5b8d11-5a69-4ab1-9ae5-207fb66f3b78/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...