./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec0_product33.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d990ac8-828b-4778-b226-9cca62d7b1d1/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d990ac8-828b-4778-b226-9cca62d7b1d1/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d990ac8-828b-4778-b226-9cca62d7b1d1/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d990ac8-828b-4778-b226-9cca62d7b1d1/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec0_product33.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d990ac8-828b-4778-b226-9cca62d7b1d1/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d990ac8-828b-4778-b226-9cca62d7b1d1/bin/uautomizer-w2VwFs6gM0 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6a2f1102c08ad072b808cfc472937f1cd1560bb61fc22de7fb77e42f10991bfd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 15:32:12,583 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 15:32:12,584 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 15:32:12,618 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 15:32:12,619 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 15:32:12,620 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 15:32:12,622 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 15:32:12,628 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 15:32:12,630 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 15:32:12,632 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 15:32:12,633 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 15:32:12,636 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 15:32:12,637 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 15:32:12,642 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 15:32:12,644 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 15:32:12,647 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 15:32:12,652 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 15:32:12,659 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 15:32:12,661 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 15:32:12,663 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 15:32:12,670 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 15:32:12,672 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 15:32:12,673 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 15:32:12,675 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 15:32:12,679 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 15:32:12,688 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 15:32:12,688 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 15:32:12,689 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 15:32:12,691 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 15:32:12,692 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 15:32:12,694 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 15:32:12,695 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 15:32:12,696 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 15:32:12,697 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 15:32:12,699 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 15:32:12,700 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 15:32:12,701 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 15:32:12,701 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 15:32:12,701 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 15:32:12,702 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 15:32:12,703 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 15:32:12,704 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d990ac8-828b-4778-b226-9cca62d7b1d1/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 15:32:12,753 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 15:32:12,754 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 15:32:12,754 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 15:32:12,755 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 15:32:12,759 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 15:32:12,759 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 15:32:12,760 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 15:32:12,760 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 15:32:12,760 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 15:32:12,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 15:32:12,762 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 15:32:12,762 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 15:32:12,762 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 15:32:12,763 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 15:32:12,763 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 15:32:12,763 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 15:32:12,763 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 15:32:12,763 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 15:32:12,764 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 15:32:12,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 15:32:12,764 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 15:32:12,764 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 15:32:12,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:32:12,765 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 15:32:12,765 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 15:32:12,766 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 15:32:12,766 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 15:32:12,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 15:32:12,766 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 15:32:12,768 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 15:32:12,768 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 15:32:12,768 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 15:32:12,769 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_7d990ac8-828b-4778-b226-9cca62d7b1d1/bin/uautomizer-w2VwFs6gM0/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d990ac8-828b-4778-b226-9cca62d7b1d1/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6a2f1102c08ad072b808cfc472937f1cd1560bb61fc22de7fb77e42f10991bfd [2021-11-22 15:32:13,045 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 15:32:13,077 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 15:32:13,079 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 15:32:13,080 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 15:32:13,081 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 15:32:13,082 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d990ac8-828b-4778-b226-9cca62d7b1d1/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/product-lines/email_spec0_product33.cil.c [2021-11-22 15:32:13,178 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d990ac8-828b-4778-b226-9cca62d7b1d1/bin/uautomizer-w2VwFs6gM0/data/2ae40aa1b/9bd4b711e2624d919197136737b3f07c/FLAG367c89f67 [2021-11-22 15:32:13,739 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 15:32:13,739 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d990ac8-828b-4778-b226-9cca62d7b1d1/sv-benchmarks/c/product-lines/email_spec0_product33.cil.c [2021-11-22 15:32:13,773 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d990ac8-828b-4778-b226-9cca62d7b1d1/bin/uautomizer-w2VwFs6gM0/data/2ae40aa1b/9bd4b711e2624d919197136737b3f07c/FLAG367c89f67 [2021-11-22 15:32:13,973 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d990ac8-828b-4778-b226-9cca62d7b1d1/bin/uautomizer-w2VwFs6gM0/data/2ae40aa1b/9bd4b711e2624d919197136737b3f07c [2021-11-22 15:32:13,975 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 15:32:13,977 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 15:32:13,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 15:32:13,978 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 15:32:13,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 15:32:13,982 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:32:13" (1/1) ... [2021-11-22 15:32:13,983 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f06aa27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:32:13, skipping insertion in model container [2021-11-22 15:32:13,984 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:32:13" (1/1) ... [2021-11-22 15:32:13,990 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 15:32:14,056 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 15:32:14,498 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d990ac8-828b-4778-b226-9cca62d7b1d1/sv-benchmarks/c/product-lines/email_spec0_product33.cil.c[31228,31241] [2021-11-22 15:32:14,645 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:32:14,655 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 15:32:14,699 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d990ac8-828b-4778-b226-9cca62d7b1d1/sv-benchmarks/c/product-lines/email_spec0_product33.cil.c[31228,31241] [2021-11-22 15:32:14,745 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:32:14,782 INFO L208 MainTranslator]: Completed translation [2021-11-22 15:32:14,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:32:14 WrapperNode [2021-11-22 15:32:14,783 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 15:32:14,784 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 15:32:14,784 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 15:32:14,784 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 15:32:14,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:32:14" (1/1) ... [2021-11-22 15:32:14,819 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:32:14" (1/1) ... [2021-11-22 15:32:14,959 INFO L137 Inliner]: procedures = 134, calls = 227, calls flagged for inlining = 136, calls inlined = 203, statements flattened = 3060 [2021-11-22 15:32:14,960 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 15:32:14,961 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 15:32:14,961 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 15:32:14,961 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 15:32:14,969 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:32:14" (1/1) ... [2021-11-22 15:32:14,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:32:14" (1/1) ... [2021-11-22 15:32:14,991 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:32:14" (1/1) ... [2021-11-22 15:32:14,996 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:32:14" (1/1) ... [2021-11-22 15:32:15,083 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:32:14" (1/1) ... [2021-11-22 15:32:15,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:32:14" (1/1) ... [2021-11-22 15:32:15,138 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:32:14" (1/1) ... [2021-11-22 15:32:15,167 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 15:32:15,172 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 15:32:15,173 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 15:32:15,173 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 15:32:15,175 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:32:14" (1/1) ... [2021-11-22 15:32:15,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:32:15,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d990ac8-828b-4778-b226-9cca62d7b1d1/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:32:15,213 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d990ac8-828b-4778-b226-9cca62d7b1d1/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 15:32:15,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d990ac8-828b-4778-b226-9cca62d7b1d1/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 15:32:15,265 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-22 15:32:15,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 15:32:15,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 15:32:15,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 15:32:15,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 15:32:15,499 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 15:32:15,501 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 15:32:17,070 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 15:32:17,092 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 15:32:17,094 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-22 15:32:17,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:32:17 BoogieIcfgContainer [2021-11-22 15:32:17,098 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 15:32:17,100 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 15:32:17,100 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 15:32:17,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 15:32:17,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 03:32:13" (1/3) ... [2021-11-22 15:32:17,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1236f7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:32:17, skipping insertion in model container [2021-11-22 15:32:17,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:32:14" (2/3) ... [2021-11-22 15:32:17,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1236f7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:32:17, skipping insertion in model container [2021-11-22 15:32:17,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:32:17" (3/3) ... [2021-11-22 15:32:17,106 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec0_product33.cil.c [2021-11-22 15:32:17,114 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 15:32:17,115 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-22 15:32:17,183 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 15:32:17,191 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-22 15:32:17,192 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-22 15:32:17,228 INFO L276 IsEmpty]: Start isEmpty. Operand has 645 states, 642 states have (on average 1.6682242990654206) internal successors, (1071), 644 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:17,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-22 15:32:17,262 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:32:17,263 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:32:17,263 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:32:17,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:32:17,269 INFO L85 PathProgramCache]: Analyzing trace with hash 577416250, now seen corresponding path program 1 times [2021-11-22 15:32:17,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:32:17,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351108560] [2021-11-22 15:32:17,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:32:17,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:32:17,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:32:17,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:32:17,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:32:17,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351108560] [2021-11-22 15:32:17,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351108560] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:32:17,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:32:17,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:32:17,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804987382] [2021-11-22 15:32:17,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:32:17,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:32:17,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:32:17,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:32:17,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:32:17,601 INFO L87 Difference]: Start difference. First operand has 645 states, 642 states have (on average 1.6682242990654206) internal successors, (1071), 644 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:17,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:32:17,780 INFO L93 Difference]: Finished difference Result 1890 states and 3145 transitions. [2021-11-22 15:32:17,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:32:17,785 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-11-22 15:32:17,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:32:17,815 INFO L225 Difference]: With dead ends: 1890 [2021-11-22 15:32:17,815 INFO L226 Difference]: Without dead ends: 1163 [2021-11-22 15:32:17,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:32:17,825 INFO L933 BasicCegarLoop]: 2089 mSDtfsCounter, 1040 mSDsluCounter, 1035 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1040 SdHoareTripleChecker+Valid, 3124 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:32:17,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1040 Valid, 3124 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:32:17,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-11-22 15:32:17,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 592. [2021-11-22 15:32:17,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 590 states have (on average 1.676271186440678) internal successors, (989), 591 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:17,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 989 transitions. [2021-11-22 15:32:17,950 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 989 transitions. Word has length 76 [2021-11-22 15:32:17,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:32:17,950 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 989 transitions. [2021-11-22 15:32:17,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:17,951 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 989 transitions. [2021-11-22 15:32:17,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-22 15:32:17,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:32:17,961 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:32:17,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 15:32:17,963 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:32:17,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:32:17,966 INFO L85 PathProgramCache]: Analyzing trace with hash 603116011, now seen corresponding path program 1 times [2021-11-22 15:32:17,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:32:17,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804688911] [2021-11-22 15:32:17,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:32:17,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:32:18,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:32:18,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:32:18,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:32:18,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804688911] [2021-11-22 15:32:18,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804688911] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:32:18,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:32:18,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:32:18,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190344119] [2021-11-22 15:32:18,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:32:18,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:32:18,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:32:18,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:32:18,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:32:18,105 INFO L87 Difference]: Start difference. First operand 592 states and 989 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:18,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:32:18,301 INFO L93 Difference]: Finished difference Result 1717 states and 2875 transitions. [2021-11-22 15:32:18,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 15:32:18,302 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-22 15:32:18,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:32:18,310 INFO L225 Difference]: With dead ends: 1717 [2021-11-22 15:32:18,310 INFO L226 Difference]: Without dead ends: 1148 [2021-11-22 15:32:18,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-22 15:32:18,313 INFO L933 BasicCegarLoop]: 1886 mSDtfsCounter, 1932 mSDsluCounter, 2821 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1932 SdHoareTripleChecker+Valid, 4707 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:32:18,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1932 Valid, 4707 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:32:18,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2021-11-22 15:32:18,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 592. [2021-11-22 15:32:18,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 590 states have (on average 1.6745762711864407) internal successors, (988), 591 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:18,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 988 transitions. [2021-11-22 15:32:18,350 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 988 transitions. Word has length 78 [2021-11-22 15:32:18,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:32:18,351 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 988 transitions. [2021-11-22 15:32:18,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:18,351 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 988 transitions. [2021-11-22 15:32:18,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-22 15:32:18,353 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:32:18,353 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:32:18,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 15:32:18,354 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:32:18,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:32:18,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1693665136, now seen corresponding path program 1 times [2021-11-22 15:32:18,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:32:18,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121798966] [2021-11-22 15:32:18,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:32:18,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:32:18,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:32:18,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:32:18,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:32:18,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121798966] [2021-11-22 15:32:18,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121798966] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:32:18,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:32:18,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:32:18,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32768162] [2021-11-22 15:32:18,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:32:18,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:32:18,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:32:18,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:32:18,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:32:18,499 INFO L87 Difference]: Start difference. First operand 592 states and 988 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:18,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:32:18,547 INFO L93 Difference]: Finished difference Result 1163 states and 1947 transitions. [2021-11-22 15:32:18,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:32:18,548 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-11-22 15:32:18,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:32:18,552 INFO L225 Difference]: With dead ends: 1163 [2021-11-22 15:32:18,552 INFO L226 Difference]: Without dead ends: 599 [2021-11-22 15:32:18,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:32:18,555 INFO L933 BasicCegarLoop]: 992 mSDtfsCounter, 961 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 961 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:32:18,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [961 Valid, 1014 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:32:18,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-11-22 15:32:18,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 592. [2021-11-22 15:32:18,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 590 states have (on average 1.6694915254237288) internal successors, (985), 591 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:18,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 985 transitions. [2021-11-22 15:32:18,582 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 985 transitions. Word has length 79 [2021-11-22 15:32:18,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:32:18,583 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 985 transitions. [2021-11-22 15:32:18,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:18,583 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 985 transitions. [2021-11-22 15:32:18,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-22 15:32:18,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:32:18,585 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:32:18,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 15:32:18,586 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:32:18,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:32:18,586 INFO L85 PathProgramCache]: Analyzing trace with hash -707177131, now seen corresponding path program 1 times [2021-11-22 15:32:18,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:32:18,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484950356] [2021-11-22 15:32:18,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:32:18,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:32:18,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:32:18,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:32:18,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:32:18,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484950356] [2021-11-22 15:32:18,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484950356] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:32:18,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:32:18,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:32:18,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340284135] [2021-11-22 15:32:18,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:32:18,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:32:18,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:32:18,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:32:18,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:32:18,652 INFO L87 Difference]: Start difference. First operand 592 states and 985 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:18,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:32:18,875 INFO L93 Difference]: Finished difference Result 1704 states and 2852 transitions. [2021-11-22 15:32:18,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 15:32:18,876 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-22 15:32:18,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:32:18,884 INFO L225 Difference]: With dead ends: 1704 [2021-11-22 15:32:18,884 INFO L226 Difference]: Without dead ends: 1145 [2021-11-22 15:32:18,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:32:18,887 INFO L933 BasicCegarLoop]: 969 mSDtfsCounter, 4676 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4676 SdHoareTripleChecker+Valid, 1951 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:32:18,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4676 Valid, 1951 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:32:18,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-11-22 15:32:18,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 592. [2021-11-22 15:32:18,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 590 states have (on average 1.6677966101694914) internal successors, (984), 591 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:18,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 984 transitions. [2021-11-22 15:32:18,932 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 984 transitions. Word has length 81 [2021-11-22 15:32:18,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:32:18,933 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 984 transitions. [2021-11-22 15:32:18,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:18,933 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 984 transitions. [2021-11-22 15:32:18,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-22 15:32:18,935 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:32:18,936 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:32:18,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-22 15:32:18,936 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:32:18,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:32:18,937 INFO L85 PathProgramCache]: Analyzing trace with hash 815407366, now seen corresponding path program 1 times [2021-11-22 15:32:18,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:32:18,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883356961] [2021-11-22 15:32:18,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:32:18,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:32:18,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:32:19,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:32:19,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:32:19,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883356961] [2021-11-22 15:32:19,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883356961] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:32:19,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:32:19,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:32:19,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796278394] [2021-11-22 15:32:19,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:32:19,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:32:19,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:32:19,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:32:19,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:32:19,007 INFO L87 Difference]: Start difference. First operand 592 states and 984 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:19,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:32:19,192 INFO L93 Difference]: Finished difference Result 1711 states and 2858 transitions. [2021-11-22 15:32:19,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 15:32:19,193 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-22 15:32:19,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:32:19,200 INFO L225 Difference]: With dead ends: 1711 [2021-11-22 15:32:19,201 INFO L226 Difference]: Without dead ends: 1152 [2021-11-22 15:32:19,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:32:19,203 INFO L933 BasicCegarLoop]: 968 mSDtfsCounter, 4680 mSDsluCounter, 986 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4680 SdHoareTripleChecker+Valid, 1954 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:32:19,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4680 Valid, 1954 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:32:19,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2021-11-22 15:32:19,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 592. [2021-11-22 15:32:19,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 590 states have (on average 1.6661016949152543) internal successors, (983), 591 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:19,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 983 transitions. [2021-11-22 15:32:19,266 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 983 transitions. Word has length 82 [2021-11-22 15:32:19,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:32:19,266 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 983 transitions. [2021-11-22 15:32:19,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:19,267 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 983 transitions. [2021-11-22 15:32:19,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-22 15:32:19,268 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:32:19,269 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:32:19,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-22 15:32:19,269 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:32:19,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:32:19,270 INFO L85 PathProgramCache]: Analyzing trace with hash 872573392, now seen corresponding path program 1 times [2021-11-22 15:32:19,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:32:19,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247900106] [2021-11-22 15:32:19,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:32:19,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:32:19,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:32:19,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:32:19,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:32:19,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247900106] [2021-11-22 15:32:19,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247900106] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:32:19,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:32:19,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:32:19,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631950400] [2021-11-22 15:32:19,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:32:19,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:32:19,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:32:19,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:32:19,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:32:19,328 INFO L87 Difference]: Start difference. First operand 592 states and 983 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:19,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:32:19,385 INFO L93 Difference]: Finished difference Result 924 states and 1517 transitions. [2021-11-22 15:32:19,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:32:19,385 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-11-22 15:32:19,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:32:19,390 INFO L225 Difference]: With dead ends: 924 [2021-11-22 15:32:19,390 INFO L226 Difference]: Without dead ends: 595 [2021-11-22 15:32:19,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:32:19,392 INFO L933 BasicCegarLoop]: 981 mSDtfsCounter, 1 mSDsluCounter, 979 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1960 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:32:19,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 1960 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:32:19,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-11-22 15:32:19,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 594. [2021-11-22 15:32:19,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 592 states have (on average 1.6638513513513513) internal successors, (985), 593 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:19,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 985 transitions. [2021-11-22 15:32:19,437 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 985 transitions. Word has length 83 [2021-11-22 15:32:19,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:32:19,438 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 985 transitions. [2021-11-22 15:32:19,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:19,439 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 985 transitions. [2021-11-22 15:32:19,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-22 15:32:19,440 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:32:19,441 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:32:19,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-22 15:32:19,441 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:32:19,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:32:19,442 INFO L85 PathProgramCache]: Analyzing trace with hash 119230293, now seen corresponding path program 1 times [2021-11-22 15:32:19,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:32:19,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640461041] [2021-11-22 15:32:19,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:32:19,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:32:19,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:32:19,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:32:19,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:32:19,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640461041] [2021-11-22 15:32:19,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640461041] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:32:19,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:32:19,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:32:19,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112536770] [2021-11-22 15:32:19,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:32:19,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:32:19,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:32:19,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:32:19,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:32:19,496 INFO L87 Difference]: Start difference. First operand 594 states and 985 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 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) [2021-11-22 15:32:19,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:32:19,593 INFO L93 Difference]: Finished difference Result 1654 states and 2765 transitions. [2021-11-22 15:32:19,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:32:19,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 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) Word has length 92 [2021-11-22 15:32:19,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:32:19,602 INFO L225 Difference]: With dead ends: 1654 [2021-11-22 15:32:19,602 INFO L226 Difference]: Without dead ends: 1098 [2021-11-22 15:32:19,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:32:19,607 INFO L933 BasicCegarLoop]: 982 mSDtfsCounter, 933 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 933 SdHoareTripleChecker+Valid, 1866 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:32:19,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [933 Valid, 1866 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:32:19,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2021-11-22 15:32:19,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 769. [2021-11-22 15:32:19,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 767 states have (on average 1.6897001303780965) internal successors, (1296), 768 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:19,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 1296 transitions. [2021-11-22 15:32:19,675 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 1296 transitions. Word has length 92 [2021-11-22 15:32:19,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:32:19,675 INFO L470 AbstractCegarLoop]: Abstraction has 769 states and 1296 transitions. [2021-11-22 15:32:19,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 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) [2021-11-22 15:32:19,676 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 1296 transitions. [2021-11-22 15:32:19,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-22 15:32:19,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:32:19,678 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:32:19,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-22 15:32:19,679 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:32:19,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:32:19,680 INFO L85 PathProgramCache]: Analyzing trace with hash 250591395, now seen corresponding path program 1 times [2021-11-22 15:32:19,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:32:19,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072196761] [2021-11-22 15:32:19,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:32:19,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:32:19,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:32:19,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:32:19,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:32:19,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072196761] [2021-11-22 15:32:19,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072196761] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:32:19,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:32:19,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:32:19,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166355496] [2021-11-22 15:32:19,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:32:19,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:32:19,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:32:19,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:32:19,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:32:19,770 INFO L87 Difference]: Start difference. First operand 769 states and 1296 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:19,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:32:19,964 INFO L93 Difference]: Finished difference Result 2221 states and 3778 transitions. [2021-11-22 15:32:19,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 15:32:19,964 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2021-11-22 15:32:19,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:32:19,974 INFO L225 Difference]: With dead ends: 2221 [2021-11-22 15:32:19,975 INFO L226 Difference]: Without dead ends: 1490 [2021-11-22 15:32:19,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:32:19,977 INFO L933 BasicCegarLoop]: 1889 mSDtfsCounter, 1901 mSDsluCounter, 2833 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1901 SdHoareTripleChecker+Valid, 4722 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:32:19,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1901 Valid, 4722 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:32:19,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2021-11-22 15:32:20,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 769. [2021-11-22 15:32:20,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 767 states have (on average 1.6870925684485008) internal successors, (1294), 768 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:20,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 1294 transitions. [2021-11-22 15:32:20,046 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 1294 transitions. Word has length 93 [2021-11-22 15:32:20,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:32:20,046 INFO L470 AbstractCegarLoop]: Abstraction has 769 states and 1294 transitions. [2021-11-22 15:32:20,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:20,046 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 1294 transitions. [2021-11-22 15:32:20,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-22 15:32:20,048 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:32:20,049 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:32:20,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-22 15:32:20,049 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:32:20,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:32:20,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1691166058, now seen corresponding path program 1 times [2021-11-22 15:32:20,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:32:20,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281246188] [2021-11-22 15:32:20,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:32:20,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:32:20,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:32:20,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:32:20,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:32:20,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281246188] [2021-11-22 15:32:20,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281246188] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:32:20,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:32:20,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:32:20,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941127155] [2021-11-22 15:32:20,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:32:20,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:32:20,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:32:20,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:32:20,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:32:20,100 INFO L87 Difference]: Start difference. First operand 769 states and 1294 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:20,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:32:20,227 INFO L93 Difference]: Finished difference Result 2219 states and 3770 transitions. [2021-11-22 15:32:20,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:32:20,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-22 15:32:20,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:32:20,238 INFO L225 Difference]: With dead ends: 2219 [2021-11-22 15:32:20,238 INFO L226 Difference]: Without dead ends: 1488 [2021-11-22 15:32:20,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:32:20,240 INFO L933 BasicCegarLoop]: 1512 mSDtfsCounter, 930 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 2482 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:32:20,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [930 Valid, 2482 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:32:20,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2021-11-22 15:32:20,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 1159. [2021-11-22 15:32:20,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1159 states, 1157 states have (on average 1.7208297320656871) internal successors, (1991), 1158 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:20,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 1991 transitions. [2021-11-22 15:32:20,332 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 1991 transitions. Word has length 94 [2021-11-22 15:32:20,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:32:20,332 INFO L470 AbstractCegarLoop]: Abstraction has 1159 states and 1991 transitions. [2021-11-22 15:32:20,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:20,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 1991 transitions. [2021-11-22 15:32:20,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-22 15:32:20,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:32:20,335 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:32:20,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-22 15:32:20,336 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:32:20,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:32:20,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1370741129, now seen corresponding path program 1 times [2021-11-22 15:32:20,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:32:20,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436316779] [2021-11-22 15:32:20,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:32:20,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:32:20,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:32:20,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:32:20,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:32:20,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436316779] [2021-11-22 15:32:20,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436316779] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:32:20,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879048788] [2021-11-22 15:32:20,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:32:20,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:32:20,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d990ac8-828b-4778-b226-9cca62d7b1d1/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:32:20,394 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d990ac8-828b-4778-b226-9cca62d7b1d1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:32:20,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d990ac8-828b-4778-b226-9cca62d7b1d1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 15:32:20,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:32:20,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 1002 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 15:32:20,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:32:20,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:32:20,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:32:20,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:32:20,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879048788] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:32:20,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:32:20,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-22 15:32:20,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592905376] [2021-11-22 15:32:20,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:32:20,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 15:32:20,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:32:20,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 15:32:20,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:32:20,998 INFO L87 Difference]: Start difference. First operand 1159 states and 1991 transitions. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:21,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:32:21,341 INFO L93 Difference]: Finished difference Result 4123 states and 7051 transitions. [2021-11-22 15:32:21,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:32:21,341 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 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 94 [2021-11-22 15:32:21,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:32:21,366 INFO L225 Difference]: With dead ends: 4123 [2021-11-22 15:32:21,366 INFO L226 Difference]: Without dead ends: 3794 [2021-11-22 15:32:21,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:32:21,369 INFO L933 BasicCegarLoop]: 980 mSDtfsCounter, 5566 mSDsluCounter, 3780 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5566 SdHoareTripleChecker+Valid, 4760 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:32:21,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5566 Valid, 4760 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:32:21,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3794 states. [2021-11-22 15:32:21,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3794 to 2807. [2021-11-22 15:32:21,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2807 states, 2805 states have (on average 1.7540106951871657) internal successors, (4920), 2806 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:21,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2807 states to 2807 states and 4920 transitions. [2021-11-22 15:32:21,613 INFO L78 Accepts]: Start accepts. Automaton has 2807 states and 4920 transitions. Word has length 94 [2021-11-22 15:32:21,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:32:21,614 INFO L470 AbstractCegarLoop]: Abstraction has 2807 states and 4920 transitions. [2021-11-22 15:32:21,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:21,614 INFO L276 IsEmpty]: Start isEmpty. Operand 2807 states and 4920 transitions. [2021-11-22 15:32:21,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-22 15:32:21,620 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:32:21,621 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:32:21,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d990ac8-828b-4778-b226-9cca62d7b1d1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 15:32:21,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d990ac8-828b-4778-b226-9cca62d7b1d1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-22 15:32:21,836 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:32:21,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:32:21,836 INFO L85 PathProgramCache]: Analyzing trace with hash 24151863, now seen corresponding path program 1 times [2021-11-22 15:32:21,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:32:21,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520851031] [2021-11-22 15:32:21,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:32:21,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:32:21,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:32:21,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:32:21,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:32:21,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520851031] [2021-11-22 15:32:21,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520851031] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:32:21,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:32:21,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:32:21,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726796487] [2021-11-22 15:32:21,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:32:21,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:32:21,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:32:21,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:32:21,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:32:21,902 INFO L87 Difference]: Start difference. First operand 2807 states and 4920 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 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) [2021-11-22 15:32:22,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:32:22,239 INFO L93 Difference]: Finished difference Result 7345 states and 12898 transitions. [2021-11-22 15:32:22,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:32:22,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 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) Word has length 97 [2021-11-22 15:32:22,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:32:22,271 INFO L225 Difference]: With dead ends: 7345 [2021-11-22 15:32:22,272 INFO L226 Difference]: Without dead ends: 4738 [2021-11-22 15:32:22,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:32:22,277 INFO L933 BasicCegarLoop]: 982 mSDtfsCounter, 928 mSDsluCounter, 969 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 928 SdHoareTripleChecker+Valid, 1951 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:32:22,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [928 Valid, 1951 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:32:22,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4738 states. [2021-11-22 15:32:22,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4738 to 4409. [2021-11-22 15:32:22,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4409 states, 4407 states have (on average 1.761515770365328) internal successors, (7763), 4408 states have internal predecessors, (7763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:22,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 7763 transitions. [2021-11-22 15:32:22,649 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 7763 transitions. Word has length 97 [2021-11-22 15:32:22,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:32:22,649 INFO L470 AbstractCegarLoop]: Abstraction has 4409 states and 7763 transitions. [2021-11-22 15:32:22,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 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) [2021-11-22 15:32:22,649 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 7763 transitions. [2021-11-22 15:32:22,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-22 15:32:22,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:32:22,662 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:32:22,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-22 15:32:22,662 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:32:22,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:32:22,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1639792407, now seen corresponding path program 1 times [2021-11-22 15:32:22,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:32:22,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228502075] [2021-11-22 15:32:22,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:32:22,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:32:22,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:32:22,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:32:22,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:32:22,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228502075] [2021-11-22 15:32:22,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228502075] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:32:22,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:32:22,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:32:22,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18111046] [2021-11-22 15:32:22,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:32:22,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:32:22,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:32:22,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:32:22,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:32:22,716 INFO L87 Difference]: Start difference. First operand 4409 states and 7763 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:23,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:32:23,213 INFO L93 Difference]: Finished difference Result 10809 states and 19025 transitions. [2021-11-22 15:32:23,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:32:23,213 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2021-11-22 15:32:23,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:32:23,272 INFO L225 Difference]: With dead ends: 10809 [2021-11-22 15:32:23,273 INFO L226 Difference]: Without dead ends: 6967 [2021-11-22 15:32:23,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:32:23,281 INFO L933 BasicCegarLoop]: 981 mSDtfsCounter, 926 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 926 SdHoareTripleChecker+Valid, 1902 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:32:23,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [926 Valid, 1902 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:32:23,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6967 states. [2021-11-22 15:32:23,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6967 to 6638. [2021-11-22 15:32:23,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6638 states, 6636 states have (on average 1.761603375527426) internal successors, (11690), 6637 states have internal predecessors, (11690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:23,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6638 states to 6638 states and 11690 transitions. [2021-11-22 15:32:23,880 INFO L78 Accepts]: Start accepts. Automaton has 6638 states and 11690 transitions. Word has length 98 [2021-11-22 15:32:23,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:32:23,880 INFO L470 AbstractCegarLoop]: Abstraction has 6638 states and 11690 transitions. [2021-11-22 15:32:23,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:23,881 INFO L276 IsEmpty]: Start isEmpty. Operand 6638 states and 11690 transitions. [2021-11-22 15:32:23,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-22 15:32:23,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:32:23,895 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:32:23,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-22 15:32:23,896 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:32:23,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:32:23,897 INFO L85 PathProgramCache]: Analyzing trace with hash 307449797, now seen corresponding path program 1 times [2021-11-22 15:32:23,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:32:23,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668032072] [2021-11-22 15:32:23,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:32:23,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:32:23,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:32:23,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:32:23,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:32:23,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668032072] [2021-11-22 15:32:23,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668032072] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:32:23,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:32:23,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:32:23,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104290385] [2021-11-22 15:32:23,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:32:23,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:32:23,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:32:23,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:32:23,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:32:23,954 INFO L87 Difference]: Start difference. First operand 6638 states and 11690 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:24,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:32:24,579 INFO L93 Difference]: Finished difference Result 15897 states and 27978 transitions. [2021-11-22 15:32:24,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:32:24,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2021-11-22 15:32:24,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:32:24,606 INFO L225 Difference]: With dead ends: 15897 [2021-11-22 15:32:24,606 INFO L226 Difference]: Without dead ends: 10415 [2021-11-22 15:32:24,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:32:24,616 INFO L933 BasicCegarLoop]: 981 mSDtfsCounter, 924 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 1902 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:32:24,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [924 Valid, 1902 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:32:24,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10415 states. [2021-11-22 15:32:25,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10415 to 10086. [2021-11-22 15:32:25,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10086 states, 10084 states have (on average 1.7594208647362157) internal successors, (17742), 10085 states have internal predecessors, (17742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:25,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10086 states to 10086 states and 17742 transitions. [2021-11-22 15:32:25,344 INFO L78 Accepts]: Start accepts. Automaton has 10086 states and 17742 transitions. Word has length 99 [2021-11-22 15:32:25,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:32:25,344 INFO L470 AbstractCegarLoop]: Abstraction has 10086 states and 17742 transitions. [2021-11-22 15:32:25,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:25,345 INFO L276 IsEmpty]: Start isEmpty. Operand 10086 states and 17742 transitions. [2021-11-22 15:32:25,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-22 15:32:25,364 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:32:25,364 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:32:25,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-22 15:32:25,365 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:32:25,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:32:25,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1754181799, now seen corresponding path program 1 times [2021-11-22 15:32:25,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:32:25,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423707329] [2021-11-22 15:32:25,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:32:25,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:32:25,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:32:25,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:32:25,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:32:25,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423707329] [2021-11-22 15:32:25,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423707329] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:32:25,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:32:25,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:32:25,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72080278] [2021-11-22 15:32:25,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:32:25,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:32:25,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:32:25,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:32:25,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:32:25,437 INFO L87 Difference]: Start difference. First operand 10086 states and 17742 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 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) [2021-11-22 15:32:26,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:32:26,426 INFO L93 Difference]: Finished difference Result 25272 states and 44534 transitions. [2021-11-22 15:32:26,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:32:26,426 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 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) Word has length 100 [2021-11-22 15:32:26,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:32:26,475 INFO L225 Difference]: With dead ends: 25272 [2021-11-22 15:32:26,476 INFO L226 Difference]: Without dead ends: 16890 [2021-11-22 15:32:26,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:32:26,495 INFO L933 BasicCegarLoop]: 981 mSDtfsCounter, 922 mSDsluCounter, 969 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 1950 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:32:26,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [922 Valid, 1950 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:32:26,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16890 states. [2021-11-22 15:32:27,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16890 to 16561. [2021-11-22 15:32:27,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16561 states, 16559 states have (on average 1.760855124101697) internal successors, (29158), 16560 states have internal predecessors, (29158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:27,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16561 states to 16561 states and 29158 transitions. [2021-11-22 15:32:27,417 INFO L78 Accepts]: Start accepts. Automaton has 16561 states and 29158 transitions. Word has length 100 [2021-11-22 15:32:27,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:32:27,418 INFO L470 AbstractCegarLoop]: Abstraction has 16561 states and 29158 transitions. [2021-11-22 15:32:27,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 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) [2021-11-22 15:32:27,418 INFO L276 IsEmpty]: Start isEmpty. Operand 16561 states and 29158 transitions. [2021-11-22 15:32:27,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-22 15:32:27,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:32:27,446 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:32:27,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-22 15:32:27,447 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:32:27,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:32:27,447 INFO L85 PathProgramCache]: Analyzing trace with hash -2145619627, now seen corresponding path program 1 times [2021-11-22 15:32:27,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:32:27,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792259845] [2021-11-22 15:32:27,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:32:27,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:32:27,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:32:27,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:32:27,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:32:27,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792259845] [2021-11-22 15:32:27,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792259845] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:32:27,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:32:27,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:32:27,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274300193] [2021-11-22 15:32:27,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:32:27,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:32:27,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:32:27,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:32:27,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:32:27,496 INFO L87 Difference]: Start difference. First operand 16561 states and 29158 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:28,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:32:28,579 INFO L93 Difference]: Finished difference Result 42319 states and 74746 transitions. [2021-11-22 15:32:28,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:32:28,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 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 101 [2021-11-22 15:32:28,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:32:28,655 INFO L225 Difference]: With dead ends: 42319 [2021-11-22 15:32:28,655 INFO L226 Difference]: Without dead ends: 28352 [2021-11-22 15:32:28,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:32:28,676 INFO L933 BasicCegarLoop]: 981 mSDtfsCounter, 920 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 920 SdHoareTripleChecker+Valid, 1949 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:32:28,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [920 Valid, 1949 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:32:28,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28352 states. [2021-11-22 15:32:30,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28352 to 28023. [2021-11-22 15:32:30,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28023 states, 28021 states have (on average 1.7638556796688198) internal successors, (49425), 28022 states have internal predecessors, (49425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:30,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28023 states to 28023 states and 49425 transitions. [2021-11-22 15:32:30,312 INFO L78 Accepts]: Start accepts. Automaton has 28023 states and 49425 transitions. Word has length 101 [2021-11-22 15:32:30,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:32:30,313 INFO L470 AbstractCegarLoop]: Abstraction has 28023 states and 49425 transitions. [2021-11-22 15:32:30,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:30,313 INFO L276 IsEmpty]: Start isEmpty. Operand 28023 states and 49425 transitions. [2021-11-22 15:32:30,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-22 15:32:30,373 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:32:30,374 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:32:30,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-22 15:32:30,374 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:32:30,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:32:30,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1434832715, now seen corresponding path program 1 times [2021-11-22 15:32:30,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:32:30,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188740593] [2021-11-22 15:32:30,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:32:30,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:32:30,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:32:30,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:32:30,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:32:30,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188740593] [2021-11-22 15:32:30,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188740593] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:32:30,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:32:30,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:32:30,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764617563] [2021-11-22 15:32:30,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:32:30,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:32:30,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:32:30,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:32:30,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:32:30,426 INFO L87 Difference]: Start difference. First operand 28023 states and 49425 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:31,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:32:31,981 INFO L93 Difference]: Finished difference Result 74674 states and 131916 transitions. [2021-11-22 15:32:31,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:32:31,982 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 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 102 [2021-11-22 15:32:31,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:32:32,103 INFO L225 Difference]: With dead ends: 74674 [2021-11-22 15:32:32,104 INFO L226 Difference]: Without dead ends: 50207 [2021-11-22 15:32:32,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:32:32,138 INFO L933 BasicCegarLoop]: 981 mSDtfsCounter, 918 mSDsluCounter, 977 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 1958 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:32:32,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [918 Valid, 1958 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:32:32,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50207 states. [2021-11-22 15:32:34,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50207 to 49878. [2021-11-22 15:32:34,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49878 states, 49876 states have (on average 1.7625511267944503) internal successors, (87909), 49877 states have internal predecessors, (87909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:34,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49878 states to 49878 states and 87909 transitions. [2021-11-22 15:32:34,671 INFO L78 Accepts]: Start accepts. Automaton has 49878 states and 87909 transitions. Word has length 102 [2021-11-22 15:32:34,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:32:34,672 INFO L470 AbstractCegarLoop]: Abstraction has 49878 states and 87909 transitions. [2021-11-22 15:32:34,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:34,672 INFO L276 IsEmpty]: Start isEmpty. Operand 49878 states and 87909 transitions. [2021-11-22 15:32:34,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-22 15:32:34,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:32:34,713 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:32:34,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-22 15:32:34,713 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:32:34,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:32:34,714 INFO L85 PathProgramCache]: Analyzing trace with hash 614580001, now seen corresponding path program 1 times [2021-11-22 15:32:34,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:32:34,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439053883] [2021-11-22 15:32:34,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:32:34,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:32:34,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:32:34,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:32:34,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:32:34,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439053883] [2021-11-22 15:32:34,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439053883] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:32:34,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:32:34,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:32:34,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18220628] [2021-11-22 15:32:34,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:32:34,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:32:34,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:32:34,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:32:34,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:32:34,763 INFO L87 Difference]: Start difference. First operand 49878 states and 87909 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 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) [2021-11-22 15:32:37,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:32:37,580 INFO L93 Difference]: Finished difference Result 127817 states and 225170 transitions. [2021-11-22 15:32:37,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:32:37,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 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) Word has length 103 [2021-11-22 15:32:37,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:32:37,756 INFO L225 Difference]: With dead ends: 127817 [2021-11-22 15:32:37,756 INFO L226 Difference]: Without dead ends: 83833 [2021-11-22 15:32:37,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:32:37,792 INFO L933 BasicCegarLoop]: 981 mSDtfsCounter, 916 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 1902 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:32:37,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [916 Valid, 1902 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:32:37,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83833 states. [2021-11-22 15:32:41,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83833 to 83504. [2021-11-22 15:32:41,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83504 states, 83502 states have (on average 1.7561495533041125) internal successors, (146642), 83503 states have internal predecessors, (146642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:41,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83504 states to 83504 states and 146642 transitions. [2021-11-22 15:32:41,717 INFO L78 Accepts]: Start accepts. Automaton has 83504 states and 146642 transitions. Word has length 103 [2021-11-22 15:32:41,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:32:41,718 INFO L470 AbstractCegarLoop]: Abstraction has 83504 states and 146642 transitions. [2021-11-22 15:32:41,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 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) [2021-11-22 15:32:41,718 INFO L276 IsEmpty]: Start isEmpty. Operand 83504 states and 146642 transitions. [2021-11-22 15:32:41,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-22 15:32:41,761 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:32:41,761 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:32:41,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-22 15:32:41,762 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:32:41,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:32:41,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1833511447, now seen corresponding path program 1 times [2021-11-22 15:32:41,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:32:41,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909009094] [2021-11-22 15:32:41,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:32:41,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:32:41,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:32:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:32:41,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:32:41,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909009094] [2021-11-22 15:32:41,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909009094] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:32:41,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:32:41,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:32:41,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663681815] [2021-11-22 15:32:41,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:32:41,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:32:41,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:32:41,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:32:41,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:32:41,809 INFO L87 Difference]: Start difference. First operand 83504 states and 146642 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 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) [2021-11-22 15:32:47,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:32:47,087 INFO L93 Difference]: Finished difference Result 230209 states and 405437 transitions. [2021-11-22 15:32:47,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:32:47,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 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) Word has length 104 [2021-11-22 15:32:47,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:32:47,430 INFO L225 Difference]: With dead ends: 230209 [2021-11-22 15:32:47,430 INFO L226 Difference]: Without dead ends: 154267 [2021-11-22 15:32:47,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:32:47,505 INFO L933 BasicCegarLoop]: 981 mSDtfsCounter, 914 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 914 SdHoareTripleChecker+Valid, 1949 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:32:47,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [914 Valid, 1949 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:32:47,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154267 states. [2021-11-22 15:32:53,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154267 to 153938. [2021-11-22 15:32:53,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153938 states, 153936 states have (on average 1.7584190832553788) internal successors, (270684), 153937 states have internal predecessors, (270684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:32:54,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153938 states to 153938 states and 270684 transitions. [2021-11-22 15:32:54,151 INFO L78 Accepts]: Start accepts. Automaton has 153938 states and 270684 transitions. Word has length 104 [2021-11-22 15:32:54,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:32:54,151 INFO L470 AbstractCegarLoop]: Abstraction has 153938 states and 270684 transitions. [2021-11-22 15:32:54,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 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) [2021-11-22 15:32:54,152 INFO L276 IsEmpty]: Start isEmpty. Operand 153938 states and 270684 transitions. [2021-11-22 15:32:54,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-22 15:32:54,602 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:32:54,602 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:32:54,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-22 15:32:54,603 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:32:54,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:32:54,603 INFO L85 PathProgramCache]: Analyzing trace with hash -287322319, now seen corresponding path program 1 times [2021-11-22 15:32:54,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:32:54,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362962212] [2021-11-22 15:32:54,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:32:54,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:32:54,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:32:54,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:32:54,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:32:54,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362962212] [2021-11-22 15:32:54,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362962212] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:32:54,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:32:54,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:32:54,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855505295] [2021-11-22 15:32:54,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:32:54,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:32:54,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:32:54,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:32:54,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:32:54,725 INFO L87 Difference]: Start difference. First operand 153938 states and 270684 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)