./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/relax-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/relax-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU --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 d53812dd1177b266d0f37d9b3339dda1620cf3a3734db2ec7312de8297126685 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:07:46,721 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:07:46,723 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:07:46,755 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:07:46,756 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:07:46,757 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:07:46,759 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:07:46,761 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:07:46,763 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:07:46,764 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:07:46,765 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:07:46,766 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:07:46,767 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:07:46,768 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:07:46,770 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:07:46,771 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:07:46,772 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:07:46,774 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:07:46,776 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:07:46,779 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:07:46,781 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:07:46,783 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:07:46,784 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:07:46,785 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:07:46,789 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:07:46,789 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:07:46,790 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:07:46,791 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:07:46,792 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:07:46,793 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:07:46,793 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:07:46,794 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:07:46,795 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:07:46,796 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:07:46,797 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:07:46,798 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:07:46,799 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:07:46,799 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:07:46,800 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:07:46,801 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:07:46,802 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:07:46,803 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:07:46,828 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:07:46,829 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:07:46,829 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:07:46,830 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:07:46,831 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:07:46,831 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:07:46,832 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:07:46,832 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:07:46,833 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:07:46,833 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:07:46,834 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:07:46,834 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:07:46,835 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:07:46,835 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:07:46,835 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:07:46,836 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:07:46,836 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:07:46,837 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:07:46,837 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:07:46,838 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:07:46,838 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:07:46,838 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:07:46,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:07:46,839 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:07:46,840 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:07:46,840 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:07:46,841 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:07:46,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:07:46,842 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:07:46,842 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:07:46,842 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:07:46,843 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:07:46,843 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_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d53812dd1177b266d0f37d9b3339dda1620cf3a3734db2ec7312de8297126685 [2021-11-02 22:07:47,092 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:07:47,120 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:07:47,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:07:47,124 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:07:47,125 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:07:47,126 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/array-examples/relax-2.i [2021-11-02 22:07:47,203 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/data/a207c63d7/bdd9fb4036b443499d7b62f579286eba/FLAG5e0120f06 [2021-11-02 22:07:47,707 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:07:47,708 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/sv-benchmarks/c/array-examples/relax-2.i [2021-11-02 22:07:47,733 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/data/a207c63d7/bdd9fb4036b443499d7b62f579286eba/FLAG5e0120f06 [2021-11-02 22:07:48,027 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/data/a207c63d7/bdd9fb4036b443499d7b62f579286eba [2021-11-02 22:07:48,029 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:07:48,031 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:07:48,032 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:07:48,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:07:48,036 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:07:48,037 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:07:48" (1/1) ... [2021-11-02 22:07:48,038 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32fa70fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:07:48, skipping insertion in model container [2021-11-02 22:07:48,038 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:07:48" (1/1) ... [2021-11-02 22:07:48,045 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:07:48,095 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:07:48,323 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/sv-benchmarks/c/array-examples/relax-2.i[980,993] [2021-11-02 22:07:48,525 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:07:48,535 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:07:48,548 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/sv-benchmarks/c/array-examples/relax-2.i[980,993] [2021-11-02 22:07:48,577 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:07:48,606 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:07:48,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:07:48 WrapperNode [2021-11-02 22:07:48,607 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:07:48,608 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:07:48,609 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:07:48,609 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:07:48,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:07:48" (1/1) ... [2021-11-02 22:07:48,631 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:07:48" (1/1) ... [2021-11-02 22:07:48,660 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:07:48,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:07:48,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:07:48,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:07:48,669 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:07:48" (1/1) ... [2021-11-02 22:07:48,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:07:48" (1/1) ... [2021-11-02 22:07:48,674 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:07:48" (1/1) ... [2021-11-02 22:07:48,675 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:07:48" (1/1) ... [2021-11-02 22:07:48,683 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:07:48" (1/1) ... [2021-11-02 22:07:48,698 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:07:48" (1/1) ... [2021-11-02 22:07:48,700 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:07:48" (1/1) ... [2021-11-02 22:07:48,704 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:07:48,705 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:07:48,705 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:07:48,705 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:07:48,709 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:07:48" (1/1) ... [2021-11-02 22:07:48,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:07:48,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:07:48,756 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:07:48,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:07:48,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 22:07:48,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 22:07:48,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 22:07:48,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:07:48,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:07:48,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:07:48,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:07:49,262 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:07:49,263 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-11-02 22:07:49,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:07:49 BoogieIcfgContainer [2021-11-02 22:07:49,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:07:49,266 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:07:49,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:07:49,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:07:49,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:07:48" (1/3) ... [2021-11-02 22:07:49,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f127daf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:07:49, skipping insertion in model container [2021-11-02 22:07:49,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:07:48" (2/3) ... [2021-11-02 22:07:49,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f127daf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:07:49, skipping insertion in model container [2021-11-02 22:07:49,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:07:49" (3/3) ... [2021-11-02 22:07:49,273 INFO L111 eAbstractionObserver]: Analyzing ICFG relax-2.i [2021-11-02 22:07:49,278 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:07:49,278 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-02 22:07:49,327 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:07:49,333 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 [2021-11-02 22:07:49,333 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-02 22:07:49,349 INFO L276 IsEmpty]: Start isEmpty. Operand has 48 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 47 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:49,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-02 22:07:49,354 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:07:49,354 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:07:49,355 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:07:49,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:07:49,360 INFO L85 PathProgramCache]: Analyzing trace with hash -781886477, now seen corresponding path program 1 times [2021-11-02 22:07:49,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:07:49,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656624207] [2021-11-02 22:07:49,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:49,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:07:49,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:49,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:07:49,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:07:49,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656624207] [2021-11-02 22:07:49,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656624207] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:07:49,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:07:49,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:07:49,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502409076] [2021-11-02 22:07:49,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:07:49,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:07:49,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:07:49,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:07:49,618 INFO L87 Difference]: Start difference. First operand has 48 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 47 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:49,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:07:49,670 INFO L93 Difference]: Finished difference Result 107 states and 163 transitions. [2021-11-02 22:07:49,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:07:49,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-02 22:07:49,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:07:49,681 INFO L225 Difference]: With dead ends: 107 [2021-11-02 22:07:49,681 INFO L226 Difference]: Without dead ends: 55 [2021-11-02 22:07:49,684 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:07:49,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-02 22:07:49,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2021-11-02 22:07:49,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 45 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:49,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2021-11-02 22:07:49,720 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 11 [2021-11-02 22:07:49,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:07:49,720 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2021-11-02 22:07:49,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:49,721 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2021-11-02 22:07:49,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-02 22:07:49,722 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:07:49,722 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:07:49,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:07:49,722 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:07:49,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:07:49,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1280852140, now seen corresponding path program 1 times [2021-11-02 22:07:49,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:07:49,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493446576] [2021-11-02 22:07:49,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:49,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:07:49,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:49,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:07:49,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:07:49,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493446576] [2021-11-02 22:07:49,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493446576] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:07:49,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:07:49,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:07:49,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738400684] [2021-11-02 22:07:49,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:07:49,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:07:49,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:07:49,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:07:49,875 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:50,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:07:50,008 INFO L93 Difference]: Finished difference Result 98 states and 127 transitions. [2021-11-02 22:07:50,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:07:50,008 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-02 22:07:50,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:07:50,010 INFO L225 Difference]: With dead ends: 98 [2021-11-02 22:07:50,010 INFO L226 Difference]: Without dead ends: 69 [2021-11-02 22:07:50,011 INFO L786 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 [2021-11-02 22:07:50,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-02 22:07:50,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2021-11-02 22:07:50,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 59 states have (on average 1.4067796610169492) internal successors, (83), 61 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) [2021-11-02 22:07:50,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 83 transitions. [2021-11-02 22:07:50,021 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 83 transitions. Word has length 13 [2021-11-02 22:07:50,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:07:50,021 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 83 transitions. [2021-11-02 22:07:50,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:50,022 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 83 transitions. [2021-11-02 22:07:50,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-02 22:07:50,023 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:07:50,023 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:07:50,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:07:50,024 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:07:50,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:07:50,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1030019396, now seen corresponding path program 1 times [2021-11-02 22:07:50,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:07:50,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093720941] [2021-11-02 22:07:50,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:50,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:07:50,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:50,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:07:50,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:07:50,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093720941] [2021-11-02 22:07:50,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093720941] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:07:50,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:07:50,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:07:50,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600399169] [2021-11-02 22:07:50,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:07:50,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:07:50,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:07:50,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:07:50,496 INFO L87 Difference]: Start difference. First operand 62 states and 83 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:50,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:07:50,709 INFO L93 Difference]: Finished difference Result 133 states and 175 transitions. [2021-11-02 22:07:50,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:07:50,709 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-02 22:07:50,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:07:50,711 INFO L225 Difference]: With dead ends: 133 [2021-11-02 22:07:50,711 INFO L226 Difference]: Without dead ends: 117 [2021-11-02 22:07:50,712 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:07:50,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-02 22:07:50,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 68. [2021-11-02 22:07:50,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 65 states have (on average 1.4) internal successors, (91), 67 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:50,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 91 transitions. [2021-11-02 22:07:50,721 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 91 transitions. Word has length 15 [2021-11-02 22:07:50,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:07:50,722 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 91 transitions. [2021-11-02 22:07:50,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:50,722 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 91 transitions. [2021-11-02 22:07:50,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-02 22:07:50,723 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:07:50,723 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:07:50,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:07:50,724 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:07:50,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:07:50,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1378443542, now seen corresponding path program 1 times [2021-11-02 22:07:50,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:07:50,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314590829] [2021-11-02 22:07:50,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:50,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:07:50,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:51,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:07:51,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:07:51,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314590829] [2021-11-02 22:07:51,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314590829] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:07:51,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596186692] [2021-11-02 22:07:51,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:51,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:07:51,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:07:51,456 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:07:51,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:07:51,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:51,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 22:07:51,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:07:51,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:07:51,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596186692] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:07:51,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:07:51,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 14 [2021-11-02 22:07:51,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430414959] [2021-11-02 22:07:51,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:07:51,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:07:51,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:07:51,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:07:51,800 INFO L87 Difference]: Start difference. First operand 68 states and 91 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:51,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:07:51,914 INFO L93 Difference]: Finished difference Result 83 states and 109 transitions. [2021-11-02 22:07:51,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:07:51,915 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-02 22:07:51,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:07:51,916 INFO L225 Difference]: With dead ends: 83 [2021-11-02 22:07:51,917 INFO L226 Difference]: Without dead ends: 81 [2021-11-02 22:07:51,917 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:07:51,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-02 22:07:51,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 66. [2021-11-02 22:07:51,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 64 states have (on average 1.390625) internal successors, (89), 65 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:51,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 89 transitions. [2021-11-02 22:07:51,929 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 89 transitions. Word has length 15 [2021-11-02 22:07:51,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:07:51,929 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 89 transitions. [2021-11-02 22:07:51,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:51,930 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 89 transitions. [2021-11-02 22:07:51,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 22:07:51,931 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:07:51,931 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:07:51,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:07:52,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:07:52,132 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:07:52,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:07:52,132 INFO L85 PathProgramCache]: Analyzing trace with hash -2039170691, now seen corresponding path program 1 times [2021-11-02 22:07:52,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:07:52,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458423569] [2021-11-02 22:07:52,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:52,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:07:52,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:52,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:07:52,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:07:52,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458423569] [2021-11-02 22:07:52,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458423569] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:07:52,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:07:52,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:07:52,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341627078] [2021-11-02 22:07:52,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:07:52,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:07:52,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:07:52,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:07:52,207 INFO L87 Difference]: Start difference. First operand 66 states and 89 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:52,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:07:52,234 INFO L93 Difference]: Finished difference Result 80 states and 105 transitions. [2021-11-02 22:07:52,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:07:52,236 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-02 22:07:52,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:07:52,237 INFO L225 Difference]: With dead ends: 80 [2021-11-02 22:07:52,237 INFO L226 Difference]: Without dead ends: 66 [2021-11-02 22:07:52,237 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:07:52,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-02 22:07:52,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-11-02 22:07:52,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 64 states have (on average 1.359375) internal successors, (87), 65 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:52,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 87 transitions. [2021-11-02 22:07:52,259 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 87 transitions. Word has length 17 [2021-11-02 22:07:52,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:07:52,260 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 87 transitions. [2021-11-02 22:07:52,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:52,260 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 87 transitions. [2021-11-02 22:07:52,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 22:07:52,262 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:07:52,263 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:07:52,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:07:52,263 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:07:52,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:07:52,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1575738235, now seen corresponding path program 1 times [2021-11-02 22:07:52,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:07:52,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514391150] [2021-11-02 22:07:52,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:52,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:07:52,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:52,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:07:52,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:07:52,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514391150] [2021-11-02 22:07:52,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514391150] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:07:52,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:07:52,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:07:52,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169602803] [2021-11-02 22:07:52,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:07:52,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:07:52,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:07:52,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:07:52,334 INFO L87 Difference]: Start difference. First operand 66 states and 87 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:52,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:07:52,352 INFO L93 Difference]: Finished difference Result 111 states and 145 transitions. [2021-11-02 22:07:52,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:07:52,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-02 22:07:52,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:07:52,354 INFO L225 Difference]: With dead ends: 111 [2021-11-02 22:07:52,354 INFO L226 Difference]: Without dead ends: 94 [2021-11-02 22:07:52,355 INFO L786 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 [2021-11-02 22:07:52,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-02 22:07:52,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2021-11-02 22:07:52,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 73 states have (on average 1.356164383561644) internal successors, (99), 74 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) [2021-11-02 22:07:52,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 99 transitions. [2021-11-02 22:07:52,370 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 99 transitions. Word has length 17 [2021-11-02 22:07:52,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:07:52,371 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 99 transitions. [2021-11-02 22:07:52,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:52,372 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 99 transitions. [2021-11-02 22:07:52,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 22:07:52,376 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:07:52,376 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:07:52,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 22:07:52,377 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:07:52,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:07:52,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1101385666, now seen corresponding path program 1 times [2021-11-02 22:07:52,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:07:52,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564599166] [2021-11-02 22:07:52,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:52,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:07:52,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:52,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:07:52,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:07:52,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564599166] [2021-11-02 22:07:52,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564599166] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:07:52,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:07:52,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:07:52,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812721370] [2021-11-02 22:07:52,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:07:52,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:07:52,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:07:52,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:07:52,508 INFO L87 Difference]: Start difference. First operand 75 states and 99 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:52,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:07:52,595 INFO L93 Difference]: Finished difference Result 81 states and 104 transitions. [2021-11-02 22:07:52,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:07:52,596 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-02 22:07:52,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:07:52,597 INFO L225 Difference]: With dead ends: 81 [2021-11-02 22:07:52,597 INFO L226 Difference]: Without dead ends: 54 [2021-11-02 22:07:52,597 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:07:52,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-02 22:07:52,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-11-02 22:07:52,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 51 states have (on average 1.3529411764705883) internal successors, (69), 52 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:52,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 69 transitions. [2021-11-02 22:07:52,605 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 69 transitions. Word has length 17 [2021-11-02 22:07:52,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:07:52,605 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 69 transitions. [2021-11-02 22:07:52,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:52,606 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 69 transitions. [2021-11-02 22:07:52,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-02 22:07:52,607 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:07:52,607 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:07:52,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 22:07:52,607 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:07:52,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:07:52,608 INFO L85 PathProgramCache]: Analyzing trace with hash -466749886, now seen corresponding path program 1 times [2021-11-02 22:07:52,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:07:52,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637771792] [2021-11-02 22:07:52,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:52,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:07:52,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:52,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:07:52,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:07:52,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637771792] [2021-11-02 22:07:52,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637771792] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:07:52,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:07:52,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:07:52,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777862892] [2021-11-02 22:07:52,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:07:52,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:07:52,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:07:52,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:07:52,709 INFO L87 Difference]: Start difference. First operand 53 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:52,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:07:52,809 INFO L93 Difference]: Finished difference Result 91 states and 116 transitions. [2021-11-02 22:07:52,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:07:52,809 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-02 22:07:52,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:07:52,810 INFO L225 Difference]: With dead ends: 91 [2021-11-02 22:07:52,811 INFO L226 Difference]: Without dead ends: 87 [2021-11-02 22:07:52,811 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:07:52,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-02 22:07:52,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 67. [2021-11-02 22:07:52,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 65 states have (on average 1.3846153846153846) internal successors, (90), 66 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:52,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 90 transitions. [2021-11-02 22:07:52,817 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 90 transitions. Word has length 19 [2021-11-02 22:07:52,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:07:52,818 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 90 transitions. [2021-11-02 22:07:52,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:52,818 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 90 transitions. [2021-11-02 22:07:52,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-02 22:07:52,821 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:07:52,821 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:07:52,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 22:07:52,821 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:07:52,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:07:52,822 INFO L85 PathProgramCache]: Analyzing trace with hash -466690304, now seen corresponding path program 1 times [2021-11-02 22:07:52,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:07:52,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795773724] [2021-11-02 22:07:52,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:52,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:07:52,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:52,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:07:52,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:07:52,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795773724] [2021-11-02 22:07:52,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795773724] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:07:52,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:07:52,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:07:52,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032518764] [2021-11-02 22:07:52,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:07:52,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:07:52,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:07:52,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:07:52,911 INFO L87 Difference]: Start difference. First operand 67 states and 90 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:52,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:07:52,987 INFO L93 Difference]: Finished difference Result 97 states and 123 transitions. [2021-11-02 22:07:52,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:07:52,987 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-02 22:07:52,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:07:52,989 INFO L225 Difference]: With dead ends: 97 [2021-11-02 22:07:52,989 INFO L226 Difference]: Without dead ends: 92 [2021-11-02 22:07:52,989 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:07:52,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-02 22:07:52,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 68. [2021-11-02 22:07:52,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 66 states have (on average 1.378787878787879) internal successors, (91), 67 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:52,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 91 transitions. [2021-11-02 22:07:52,995 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 91 transitions. Word has length 19 [2021-11-02 22:07:52,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:07:52,996 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 91 transitions. [2021-11-02 22:07:52,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:52,996 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 91 transitions. [2021-11-02 22:07:52,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-02 22:07:52,997 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:07:52,997 INFO L513 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] [2021-11-02 22:07:52,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 22:07:52,998 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:07:52,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:07:52,998 INFO L85 PathProgramCache]: Analyzing trace with hash 757093595, now seen corresponding path program 1 times [2021-11-02 22:07:52,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:07:52,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035538288] [2021-11-02 22:07:52,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:52,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:07:53,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:53,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:07:53,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:07:53,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035538288] [2021-11-02 22:07:53,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035538288] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:07:53,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878473579] [2021-11-02 22:07:53,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:53,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:07:53,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:07:53,106 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:07:53,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:07:53,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:53,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 22:07:53,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:07:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:07:53,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878473579] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:07:53,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:07:53,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-02 22:07:53,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963258897] [2021-11-02 22:07:53,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:07:53,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:07:53,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:07:53,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:07:53,291 INFO L87 Difference]: Start difference. First operand 68 states and 91 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:53,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:07:53,365 INFO L93 Difference]: Finished difference Result 80 states and 105 transitions. [2021-11-02 22:07:53,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:07:53,366 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-02 22:07:53,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:07:53,367 INFO L225 Difference]: With dead ends: 80 [2021-11-02 22:07:53,367 INFO L226 Difference]: Without dead ends: 68 [2021-11-02 22:07:53,367 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:07:53,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-02 22:07:53,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-11-02 22:07:53,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 67 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:53,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2021-11-02 22:07:53,397 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 22 [2021-11-02 22:07:53,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:07:53,397 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2021-11-02 22:07:53,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:53,398 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2021-11-02 22:07:53,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-02 22:07:53,398 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:07:53,399 INFO L513 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] [2021-11-02 22:07:53,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:07:53,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-02 22:07:53,611 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:07:53,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:07:53,612 INFO L85 PathProgramCache]: Analyzing trace with hash -899171424, now seen corresponding path program 1 times [2021-11-02 22:07:53,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:07:53,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124330791] [2021-11-02 22:07:53,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:53,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:07:53,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:53,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:07:53,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:07:53,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124330791] [2021-11-02 22:07:53,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124330791] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:07:53,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:07:53,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:07:53,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694072149] [2021-11-02 22:07:53,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:07:53,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:07:53,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:07:53,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:07:53,721 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:53,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:07:53,807 INFO L93 Difference]: Finished difference Result 117 states and 148 transitions. [2021-11-02 22:07:53,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:07:53,808 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-02 22:07:53,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:07:53,809 INFO L225 Difference]: With dead ends: 117 [2021-11-02 22:07:53,810 INFO L226 Difference]: Without dead ends: 104 [2021-11-02 22:07:53,810 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:07:53,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-02 22:07:53,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 71. [2021-11-02 22:07:53,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 69 states have (on average 1.3623188405797102) internal successors, (94), 70 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) [2021-11-02 22:07:53,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2021-11-02 22:07:53,820 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 23 [2021-11-02 22:07:53,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:07:53,821 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2021-11-02 22:07:53,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:53,821 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2021-11-02 22:07:53,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-02 22:07:53,822 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:07:53,822 INFO L513 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] [2021-11-02 22:07:53,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 22:07:53,823 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:07:53,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:07:53,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1095285435, now seen corresponding path program 1 times [2021-11-02 22:07:53,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:07:53,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747218118] [2021-11-02 22:07:53,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:53,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:07:53,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:54,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:07:54,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:07:54,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747218118] [2021-11-02 22:07:54,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747218118] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:07:54,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362637777] [2021-11-02 22:07:54,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:54,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:07:54,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:07:54,295 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:07:54,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:07:54,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:54,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 22:07:54,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:07:54,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:07:54,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362637777] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:07:54,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:07:54,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2021-11-02 22:07:54,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072913264] [2021-11-02 22:07:54,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:07:54,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:07:54,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:07:54,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:07:54,634 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:55,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:07:55,231 INFO L93 Difference]: Finished difference Result 112 states and 144 transitions. [2021-11-02 22:07:55,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:07:55,232 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-02 22:07:55,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:07:55,233 INFO L225 Difference]: With dead ends: 112 [2021-11-02 22:07:55,233 INFO L226 Difference]: Without dead ends: 56 [2021-11-02 22:07:55,233 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:07:55,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-02 22:07:55,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-11-02 22:07:55,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 53 states have (on average 1.320754716981132) internal successors, (70), 54 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:55,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2021-11-02 22:07:55,239 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 23 [2021-11-02 22:07:55,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:07:55,239 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2021-11-02 22:07:55,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:55,240 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2021-11-02 22:07:55,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-02 22:07:55,240 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:07:55,240 INFO L513 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] [2021-11-02 22:07:55,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:07:55,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-02 22:07:55,455 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:07:55,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:07:55,456 INFO L85 PathProgramCache]: Analyzing trace with hash 872137146, now seen corresponding path program 1 times [2021-11-02 22:07:55,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:07:55,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86765197] [2021-11-02 22:07:55,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:55,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:07:55,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:55,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:07:55,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:07:55,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86765197] [2021-11-02 22:07:55,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86765197] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:07:55,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544768353] [2021-11-02 22:07:55,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:55,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:07:55,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:07:55,519 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:07:55,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 22:07:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:55,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 22:07:55,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:07:55,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:07:55,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544768353] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:07:55,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:07:55,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-11-02 22:07:55,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038198815] [2021-11-02 22:07:55,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 22:07:55,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:07:55,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 22:07:55,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:07:55,934 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:56,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:07:56,402 INFO L93 Difference]: Finished difference Result 192 states and 245 transitions. [2021-11-02 22:07:56,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 22:07:56,403 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-02 22:07:56,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:07:56,404 INFO L225 Difference]: With dead ends: 192 [2021-11-02 22:07:56,404 INFO L226 Difference]: Without dead ends: 176 [2021-11-02 22:07:56,405 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:07:56,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-02 22:07:56,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 82. [2021-11-02 22:07:56,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 80 states have (on average 1.375) internal successors, (110), 81 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:56,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 110 transitions. [2021-11-02 22:07:56,413 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 110 transitions. Word has length 28 [2021-11-02 22:07:56,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:07:56,414 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 110 transitions. [2021-11-02 22:07:56,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:56,414 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 110 transitions. [2021-11-02 22:07:56,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-02 22:07:56,415 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:07:56,415 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:07:56,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:07:56,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-02 22:07:56,643 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:07:56,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:07:56,644 INFO L85 PathProgramCache]: Analyzing trace with hash 67430729, now seen corresponding path program 1 times [2021-11-02 22:07:56,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:07:56,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134675072] [2021-11-02 22:07:56,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:56,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:07:56,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:07:56,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:07:56,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134675072] [2021-11-02 22:07:56,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134675072] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:07:56,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564735107] [2021-11-02 22:07:56,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:56,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:07:56,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:07:56,867 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:07:56,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 22:07:56,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:56,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 22:07:56,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:07:57,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:07:57,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564735107] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:07:57,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:07:57,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-11-02 22:07:57,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692849320] [2021-11-02 22:07:57,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:07:57,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:07:57,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:07:57,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:07:57,145 INFO L87 Difference]: Start difference. First operand 82 states and 110 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:57,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:07:57,434 INFO L93 Difference]: Finished difference Result 182 states and 237 transitions. [2021-11-02 22:07:57,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:07:57,435 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-02 22:07:57,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:07:57,436 INFO L225 Difference]: With dead ends: 182 [2021-11-02 22:07:57,436 INFO L226 Difference]: Without dead ends: 128 [2021-11-02 22:07:57,437 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:07:57,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-02 22:07:57,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 79. [2021-11-02 22:07:57,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 77 states have (on average 1.3506493506493507) internal successors, (104), 78 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) [2021-11-02 22:07:57,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 104 transitions. [2021-11-02 22:07:57,445 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 104 transitions. Word has length 29 [2021-11-02 22:07:57,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:07:57,446 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 104 transitions. [2021-11-02 22:07:57,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:57,446 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 104 transitions. [2021-11-02 22:07:57,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-02 22:07:57,447 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:07:57,447 INFO L513 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] [2021-11-02 22:07:57,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 22:07:57,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-02 22:07:57,670 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:07:57,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:07:57,670 INFO L85 PathProgramCache]: Analyzing trace with hash -379768440, now seen corresponding path program 1 times [2021-11-02 22:07:57,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:07:57,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520239067] [2021-11-02 22:07:57,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:57,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:07:57,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:07:57,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:07:57,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520239067] [2021-11-02 22:07:57,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520239067] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:07:57,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612135992] [2021-11-02 22:07:57,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:57,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:07:57,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:07:57,835 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:07:57,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 22:07:57,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:57,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 22:07:57,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:07:58,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:07:58,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612135992] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:07:58,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:07:58,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-11-02 22:07:58,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413266273] [2021-11-02 22:07:58,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 22:07:58,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:07:58,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 22:07:58,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:07:58,183 INFO L87 Difference]: Start difference. First operand 79 states and 104 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:58,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:07:58,479 INFO L93 Difference]: Finished difference Result 133 states and 169 transitions. [2021-11-02 22:07:58,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 22:07:58,479 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 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 30 [2021-11-02 22:07:58,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:07:58,480 INFO L225 Difference]: With dead ends: 133 [2021-11-02 22:07:58,480 INFO L226 Difference]: Without dead ends: 105 [2021-11-02 22:07:58,481 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:07:58,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-02 22:07:58,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 79. [2021-11-02 22:07:58,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 77 states have (on average 1.3376623376623376) internal successors, (103), 78 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) [2021-11-02 22:07:58,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 103 transitions. [2021-11-02 22:07:58,489 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 103 transitions. Word has length 30 [2021-11-02 22:07:58,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:07:58,490 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 103 transitions. [2021-11-02 22:07:58,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:58,490 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 103 transitions. [2021-11-02 22:07:58,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-02 22:07:58,490 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:07:58,491 INFO L513 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] [2021-11-02 22:07:58,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 22:07:58,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:07:58,709 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:07:58,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:07:58,709 INFO L85 PathProgramCache]: Analyzing trace with hash -966574454, now seen corresponding path program 1 times [2021-11-02 22:07:58,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:07:58,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604027375] [2021-11-02 22:07:58,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:58,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:07:58,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:58,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:07:58,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:07:58,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604027375] [2021-11-02 22:07:58,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604027375] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:07:58,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166140269] [2021-11-02 22:07:58,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:58,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:07:58,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:07:58,863 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:07:58,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 22:07:58,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:58,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 22:07:58,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:07:59,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:07:59,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166140269] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:07:59,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:07:59,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-02 22:07:59,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370943035] [2021-11-02 22:07:59,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 22:07:59,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:07:59,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 22:07:59,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:07:59,157 INFO L87 Difference]: Start difference. First operand 79 states and 103 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:59,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:07:59,410 INFO L93 Difference]: Finished difference Result 126 states and 156 transitions. [2021-11-02 22:07:59,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 22:07:59,411 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-02 22:07:59,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:07:59,411 INFO L225 Difference]: With dead ends: 126 [2021-11-02 22:07:59,411 INFO L226 Difference]: Without dead ends: 84 [2021-11-02 22:07:59,412 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:07:59,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-02 22:07:59,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 73. [2021-11-02 22:07:59,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 71 states have (on average 1.323943661971831) internal successors, (94), 72 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) [2021-11-02 22:07:59,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2021-11-02 22:07:59,420 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 30 [2021-11-02 22:07:59,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:07:59,420 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2021-11-02 22:07:59,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:59,420 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2021-11-02 22:07:59,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-02 22:07:59,421 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:07:59,421 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:07:59,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 22:07:59,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-02 22:07:59,622 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:07:59,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:07:59,622 INFO L85 PathProgramCache]: Analyzing trace with hash 394938490, now seen corresponding path program 1 times [2021-11-02 22:07:59,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:07:59,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156527976] [2021-11-02 22:07:59,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:59,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:07:59,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:59,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:07:59,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:07:59,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156527976] [2021-11-02 22:07:59,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156527976] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:07:59,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815255909] [2021-11-02 22:07:59,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:59,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:07:59,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:07:59,811 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:07:59,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 22:07:59,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:59,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 22:07:59,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:08:00,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-02 22:08:00,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815255909] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:08:00,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:08:00,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 10 [2021-11-02 22:08:00,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28503487] [2021-11-02 22:08:00,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:08:00,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:08:00,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:08:00,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:08:00,122 INFO L87 Difference]: Start difference. First operand 73 states and 94 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:00,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:08:00,194 INFO L93 Difference]: Finished difference Result 100 states and 128 transitions. [2021-11-02 22:08:00,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:08:00,194 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-02 22:08:00,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:08:00,195 INFO L225 Difference]: With dead ends: 100 [2021-11-02 22:08:00,195 INFO L226 Difference]: Without dead ends: 95 [2021-11-02 22:08:00,196 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:08:00,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-02 22:08:00,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 86. [2021-11-02 22:08:00,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 84 states have (on average 1.3333333333333333) internal successors, (112), 85 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) [2021-11-02 22:08:00,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 112 transitions. [2021-11-02 22:08:00,205 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 112 transitions. Word has length 30 [2021-11-02 22:08:00,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:08:00,205 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 112 transitions. [2021-11-02 22:08:00,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:00,206 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 112 transitions. [2021-11-02 22:08:00,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-02 22:08:00,206 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:08:00,206 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:08:00,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 22:08:00,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-02 22:08:00,428 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:08:00,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:08:00,428 INFO L85 PathProgramCache]: Analyzing trace with hash -2125081026, now seen corresponding path program 1 times [2021-11-02 22:08:00,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:08:00,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465150273] [2021-11-02 22:08:00,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:08:00,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:08:00,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:08:00,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 22:08:00,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:08:00,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465150273] [2021-11-02 22:08:00,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465150273] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:00,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097909807] [2021-11-02 22:08:00,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:08:00,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:08:00,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:08:00,881 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:08:00,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 22:08:01,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:08:01,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-02 22:08:01,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:08:01,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-02 22:08:01,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:08:01,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:08:01,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:08:01,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:08:01,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:08:01,506 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-02 22:08:01,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 38 [2021-11-02 22:08:01,537 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:08:01,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097909807] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:01,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:08:01,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 17 [2021-11-02 22:08:01,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915803710] [2021-11-02 22:08:01,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 22:08:01,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:08:01,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 22:08:01,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:08:01,540 INFO L87 Difference]: Start difference. First operand 86 states and 112 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:02,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:08:02,307 INFO L93 Difference]: Finished difference Result 386 states and 504 transitions. [2021-11-02 22:08:02,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 22:08:02,308 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-02 22:08:02,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:08:02,310 INFO L225 Difference]: With dead ends: 386 [2021-11-02 22:08:02,310 INFO L226 Difference]: Without dead ends: 358 [2021-11-02 22:08:02,311 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930 [2021-11-02 22:08:02,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-11-02 22:08:02,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 104. [2021-11-02 22:08:02,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 102 states have (on average 1.3333333333333333) internal successors, (136), 103 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:02,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 136 transitions. [2021-11-02 22:08:02,327 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 136 transitions. Word has length 30 [2021-11-02 22:08:02,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:08:02,328 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 136 transitions. [2021-11-02 22:08:02,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:02,328 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 136 transitions. [2021-11-02 22:08:02,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-02 22:08:02,329 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:08:02,329 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:08:02,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 22:08:02,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-02 22:08:02,551 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:08:02,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:08:02,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1842672761, now seen corresponding path program 2 times [2021-11-02 22:08:02,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:08:02,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031576603] [2021-11-02 22:08:02,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:08:02,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:08:02,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:08:02,790 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:08:02,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:08:02,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031576603] [2021-11-02 22:08:02,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031576603] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:02,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813608228] [2021-11-02 22:08:02,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:08:02,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:08:02,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:08:02,792 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:08:02,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 22:08:03,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:08:03,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:08:03,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 22:08:03,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:08:03,392 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:08:03,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813608228] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:03,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:08:03,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2021-11-02 22:08:03,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397260643] [2021-11-02 22:08:03,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 22:08:03,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:08:03,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 22:08:03,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:08:03,396 INFO L87 Difference]: Start difference. First operand 104 states and 136 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:04,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:08:04,568 INFO L93 Difference]: Finished difference Result 665 states and 870 transitions. [2021-11-02 22:08:04,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-02 22:08:04,568 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-02 22:08:04,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:08:04,572 INFO L225 Difference]: With dead ends: 665 [2021-11-02 22:08:04,572 INFO L226 Difference]: Without dead ends: 612 [2021-11-02 22:08:04,573 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2021-11-02 22:08:04,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-11-02 22:08:04,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 130. [2021-11-02 22:08:04,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 128 states have (on average 1.3515625) internal successors, (173), 129 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:04,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 173 transitions. [2021-11-02 22:08:04,621 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 173 transitions. Word has length 31 [2021-11-02 22:08:04,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:08:04,621 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 173 transitions. [2021-11-02 22:08:04,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:04,621 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 173 transitions. [2021-11-02 22:08:04,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-02 22:08:04,622 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:08:04,622 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:08:04,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 22:08:04,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:08:04,827 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:08:04,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:08:04,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1923768507, now seen corresponding path program 1 times [2021-11-02 22:08:04,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:08:04,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454012683] [2021-11-02 22:08:04,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:08:04,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:08:04,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:08:05,067 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 22:08:05,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:08:05,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454012683] [2021-11-02 22:08:05,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454012683] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:05,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502052338] [2021-11-02 22:08:05,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:08:05,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:08:05,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:08:05,071 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:08:05,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 22:08:05,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:08:05,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 22:08:05,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:08:05,475 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:08:05,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502052338] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:05,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:08:05,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-11-02 22:08:05,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721574022] [2021-11-02 22:08:05,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 22:08:05,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:08:05,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 22:08:05,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:08:05,477 INFO L87 Difference]: Start difference. First operand 130 states and 173 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:05,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:08:05,836 INFO L93 Difference]: Finished difference Result 175 states and 225 transitions. [2021-11-02 22:08:05,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:08:05,837 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-02 22:08:05,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:08:05,839 INFO L225 Difference]: With dead ends: 175 [2021-11-02 22:08:05,839 INFO L226 Difference]: Without dead ends: 136 [2021-11-02 22:08:05,839 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-11-02 22:08:05,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-02 22:08:05,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 119. [2021-11-02 22:08:05,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 117 states have (on average 1.3162393162393162) internal successors, (154), 118 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:05,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 154 transitions. [2021-11-02 22:08:05,859 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 154 transitions. Word has length 33 [2021-11-02 22:08:05,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:08:05,859 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 154 transitions. [2021-11-02 22:08:05,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:05,860 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 154 transitions. [2021-11-02 22:08:05,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-02 22:08:05,860 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:08:05,861 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:08:05,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 22:08:06,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:08:06,067 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:08:06,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:08:06,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1479032543, now seen corresponding path program 2 times [2021-11-02 22:08:06,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:08:06,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587948503] [2021-11-02 22:08:06,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:08:06,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:08:06,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:08:06,140 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 22:08:06,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:08:06,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587948503] [2021-11-02 22:08:06,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587948503] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:06,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281949737] [2021-11-02 22:08:06,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:08:06,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:08:06,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:08:06,158 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:08:06,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 22:08:06,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:08:06,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:08:06,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 22:08:06,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:08:06,579 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:08:06,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281949737] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:06,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:08:06,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-11-02 22:08:06,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742233228] [2021-11-02 22:08:06,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:08:06,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:08:06,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:08:06,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:08:06,581 INFO L87 Difference]: Start difference. First operand 119 states and 154 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:06,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:08:06,879 INFO L93 Difference]: Finished difference Result 162 states and 205 transitions. [2021-11-02 22:08:06,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 22:08:06,880 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-02 22:08:06,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:08:06,880 INFO L225 Difference]: With dead ends: 162 [2021-11-02 22:08:06,881 INFO L226 Difference]: Without dead ends: 133 [2021-11-02 22:08:06,881 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-11-02 22:08:06,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-02 22:08:06,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 117. [2021-11-02 22:08:06,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 115 states have (on average 1.3304347826086957) internal successors, (153), 116 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:06,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 153 transitions. [2021-11-02 22:08:06,902 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 153 transitions. Word has length 33 [2021-11-02 22:08:06,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:08:06,902 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 153 transitions. [2021-11-02 22:08:06,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:06,902 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 153 transitions. [2021-11-02 22:08:06,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-02 22:08:06,903 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:08:06,903 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:08:06,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-02 22:08:07,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-02 22:08:07,119 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:08:07,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:08:07,120 INFO L85 PathProgramCache]: Analyzing trace with hash -657533763, now seen corresponding path program 1 times [2021-11-02 22:08:07,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:08:07,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152806655] [2021-11-02 22:08:07,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:08:07,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:08:07,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:08:07,483 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:08:07,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:08:07,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152806655] [2021-11-02 22:08:07,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152806655] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:07,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015321813] [2021-11-02 22:08:07,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:08:07,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:08:07,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:08:07,485 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:08:07,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 22:08:07,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:08:07,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 22:08:07,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:08:07,933 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 22:08:07,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015321813] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:07,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:08:07,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 17 [2021-11-02 22:08:07,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925625055] [2021-11-02 22:08:07,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 22:08:07,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:08:07,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 22:08:07,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:08:07,936 INFO L87 Difference]: Start difference. First operand 117 states and 153 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:08,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:08:08,571 INFO L93 Difference]: Finished difference Result 274 states and 350 transitions. [2021-11-02 22:08:08,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 22:08:08,574 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-02 22:08:08,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:08:08,575 INFO L225 Difference]: With dead ends: 274 [2021-11-02 22:08:08,575 INFO L226 Difference]: Without dead ends: 213 [2021-11-02 22:08:08,576 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-11-02 22:08:08,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-11-02 22:08:08,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 171. [2021-11-02 22:08:08,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 169 states have (on average 1.3372781065088757) internal successors, (226), 170 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:08,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 226 transitions. [2021-11-02 22:08:08,608 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 226 transitions. Word has length 35 [2021-11-02 22:08:08,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:08:08,608 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 226 transitions. [2021-11-02 22:08:08,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:08,609 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 226 transitions. [2021-11-02 22:08:08,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-02 22:08:08,610 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:08:08,610 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:08:08,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-02 22:08:08,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:08:08,823 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:08:08,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:08:08,824 INFO L85 PathProgramCache]: Analyzing trace with hash 570184438, now seen corresponding path program 1 times [2021-11-02 22:08:08,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:08:08,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297200162] [2021-11-02 22:08:08,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:08:08,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:08:08,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:08:09,352 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:08:09,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:08:09,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297200162] [2021-11-02 22:08:09,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297200162] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:09,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489179836] [2021-11-02 22:08:09,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:08:09,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:08:09,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:08:09,355 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:08:09,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 22:08:09,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:08:09,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-02 22:08:09,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:08:10,154 INFO L354 Elim1Store]: treesize reduction 3, result has 78.6 percent of original size [2021-11-02 22:08:10,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 22 [2021-11-02 22:08:10,187 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 22:08:10,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489179836] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:10,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:08:10,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-11-02 22:08:10,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233434657] [2021-11-02 22:08:10,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-02 22:08:10,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:08:10,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-02 22:08:10,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-11-02 22:08:10,190 INFO L87 Difference]: Start difference. First operand 171 states and 226 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:10,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:08:10,815 INFO L93 Difference]: Finished difference Result 368 states and 478 transitions. [2021-11-02 22:08:10,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 22:08:10,816 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-02 22:08:10,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:08:10,818 INFO L225 Difference]: With dead ends: 368 [2021-11-02 22:08:10,818 INFO L226 Difference]: Without dead ends: 272 [2021-11-02 22:08:10,819 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 22:08:10,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-02 22:08:10,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 195. [2021-11-02 22:08:10,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 193 states have (on average 1.3160621761658031) internal successors, (254), 194 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:10,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 254 transitions. [2021-11-02 22:08:10,856 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 254 transitions. Word has length 36 [2021-11-02 22:08:10,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:08:10,856 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 254 transitions. [2021-11-02 22:08:10,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:10,857 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 254 transitions. [2021-11-02 22:08:10,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-02 22:08:10,858 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:08:10,858 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:08:10,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-02 22:08:11,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-02 22:08:11,075 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:08:11,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:08:11,076 INFO L85 PathProgramCache]: Analyzing trace with hash -797045247, now seen corresponding path program 2 times [2021-11-02 22:08:11,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:08:11,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516904546] [2021-11-02 22:08:11,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:08:11,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:08:11,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:08:11,203 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-02 22:08:11,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:08:11,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516904546] [2021-11-02 22:08:11,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516904546] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:11,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484419259] [2021-11-02 22:08:11,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:08:11,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:08:11,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:08:11,206 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:08:11,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-02 22:08:11,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:08:11,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:08:11,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 22:08:11,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:08:11,715 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 22:08:11,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484419259] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:11,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:08:11,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-11-02 22:08:11,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627605659] [2021-11-02 22:08:11,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:08:11,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:08:11,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:08:11,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:08:11,718 INFO L87 Difference]: Start difference. First operand 195 states and 254 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:11,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:08:11,986 INFO L93 Difference]: Finished difference Result 222 states and 288 transitions. [2021-11-02 22:08:11,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 22:08:11,986 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-02 22:08:11,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:08:11,988 INFO L225 Difference]: With dead ends: 222 [2021-11-02 22:08:11,988 INFO L226 Difference]: Without dead ends: 217 [2021-11-02 22:08:11,989 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-11-02 22:08:11,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-11-02 22:08:12,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 198. [2021-11-02 22:08:12,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 196 states have (on average 1.3112244897959184) internal successors, (257), 197 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:12,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 257 transitions. [2021-11-02 22:08:12,038 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 257 transitions. Word has length 37 [2021-11-02 22:08:12,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:08:12,038 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 257 transitions. [2021-11-02 22:08:12,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:12,039 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 257 transitions. [2021-11-02 22:08:12,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-02 22:08:12,039 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:08:12,040 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:08:12,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-02 22:08:12,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-02 22:08:12,263 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:08:12,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:08:12,263 INFO L85 PathProgramCache]: Analyzing trace with hash -2068517990, now seen corresponding path program 1 times [2021-11-02 22:08:12,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:08:12,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026259841] [2021-11-02 22:08:12,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:08:12,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:08:12,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:08:12,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:08:12,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:08:12,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026259841] [2021-11-02 22:08:12,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026259841] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:12,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575921901] [2021-11-02 22:08:12,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:08:12,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:08:12,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:08:12,854 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:08:12,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-02 22:08:13,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:08:13,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-02 22:08:13,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:08:13,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 22:08:13,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575921901] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:13,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:08:13,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 22 [2021-11-02 22:08:13,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327653539] [2021-11-02 22:08:13,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 22:08:13,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:08:13,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 22:08:13,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-11-02 22:08:13,429 INFO L87 Difference]: Start difference. First operand 198 states and 257 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:14,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:08:14,937 INFO L93 Difference]: Finished difference Result 462 states and 577 transitions. [2021-11-02 22:08:14,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-02 22:08:14,938 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-02 22:08:14,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:08:14,941 INFO L225 Difference]: With dead ends: 462 [2021-11-02 22:08:14,941 INFO L226 Difference]: Without dead ends: 410 [2021-11-02 22:08:14,942 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=238, Invalid=1484, Unknown=0, NotChecked=0, Total=1722 [2021-11-02 22:08:14,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-11-02 22:08:14,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 203. [2021-11-02 22:08:14,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 201 states have (on average 1.2985074626865671) internal successors, (261), 202 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:14,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 261 transitions. [2021-11-02 22:08:14,992 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 261 transitions. Word has length 38 [2021-11-02 22:08:14,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:08:14,992 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 261 transitions. [2021-11-02 22:08:14,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:14,993 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 261 transitions. [2021-11-02 22:08:14,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-02 22:08:14,994 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:08:14,994 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:08:15,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-02 22:08:15,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-02 22:08:15,207 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:08:15,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:08:15,208 INFO L85 PathProgramCache]: Analyzing trace with hash -220653639, now seen corresponding path program 1 times [2021-11-02 22:08:15,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:08:15,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405699560] [2021-11-02 22:08:15,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:08:15,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:08:15,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:08:15,784 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:08:15,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:08:15,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405699560] [2021-11-02 22:08:15,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405699560] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:15,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883783429] [2021-11-02 22:08:15,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:08:15,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:08:15,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:08:15,786 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:08:15,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-02 22:08:16,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:08:16,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 22:08:16,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:08:16,335 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 22:08:16,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883783429] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:16,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:08:16,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10] total 27 [2021-11-02 22:08:16,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589596177] [2021-11-02 22:08:16,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-02 22:08:16,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:08:16,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-02 22:08:16,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-11-02 22:08:16,338 INFO L87 Difference]: Start difference. First operand 203 states and 261 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:20,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:08:20,017 INFO L93 Difference]: Finished difference Result 1007 states and 1282 transitions. [2021-11-02 22:08:20,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-02 22:08:20,018 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-02 22:08:20,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:08:20,023 INFO L225 Difference]: With dead ends: 1007 [2021-11-02 22:08:20,023 INFO L226 Difference]: Without dead ends: 931 [2021-11-02 22:08:20,026 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=817, Invalid=4733, Unknown=0, NotChecked=0, Total=5550 [2021-11-02 22:08:20,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2021-11-02 22:08:20,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 224. [2021-11-02 22:08:20,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 222 states have (on average 1.2972972972972974) internal successors, (288), 223 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:20,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 288 transitions. [2021-11-02 22:08:20,074 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 288 transitions. Word has length 39 [2021-11-02 22:08:20,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:08:20,075 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 288 transitions. [2021-11-02 22:08:20,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:20,075 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 288 transitions. [2021-11-02 22:08:20,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-02 22:08:20,075 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:08:20,076 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:08:20,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-02 22:08:20,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-02 22:08:20,287 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:08:20,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:08:20,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1821890754, now seen corresponding path program 3 times [2021-11-02 22:08:20,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:08:20,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443891626] [2021-11-02 22:08:20,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:08:20,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:08:20,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:08:20,823 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 22:08:20,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:08:20,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443891626] [2021-11-02 22:08:20,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443891626] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:20,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219632801] [2021-11-02 22:08:20,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:08:20,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:08:20,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:08:20,824 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:08:20,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-02 22:08:21,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-02 22:08:21,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:08:21,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-02 22:08:21,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:08:21,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:08:21,615 INFO L354 Elim1Store]: treesize reduction 99, result has 27.2 percent of original size [2021-11-02 22:08:21,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 71 [2021-11-02 22:08:21,687 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 22:08:21,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219632801] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:21,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:08:21,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-11-02 22:08:21,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282623033] [2021-11-02 22:08:21,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 22:08:21,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:08:21,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 22:08:21,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:08:21,689 INFO L87 Difference]: Start difference. First operand 224 states and 288 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:22,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:08:22,434 INFO L93 Difference]: Finished difference Result 373 states and 486 transitions. [2021-11-02 22:08:22,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 22:08:22,435 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-02 22:08:22,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:08:22,437 INFO L225 Difference]: With dead ends: 373 [2021-11-02 22:08:22,437 INFO L226 Difference]: Without dead ends: 335 [2021-11-02 22:08:22,438 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2021-11-02 22:08:22,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-11-02 22:08:22,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 253. [2021-11-02 22:08:22,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 251 states have (on average 1.302788844621514) internal successors, (327), 252 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:22,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 327 transitions. [2021-11-02 22:08:22,496 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 327 transitions. Word has length 40 [2021-11-02 22:08:22,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:08:22,496 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 327 transitions. [2021-11-02 22:08:22,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:22,497 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 327 transitions. [2021-11-02 22:08:22,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-02 22:08:22,497 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:08:22,498 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:08:22,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-02 22:08:22,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-02 22:08:22,703 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:08:22,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:08:22,704 INFO L85 PathProgramCache]: Analyzing trace with hash -146935456, now seen corresponding path program 3 times [2021-11-02 22:08:22,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:08:22,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575049765] [2021-11-02 22:08:22,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:08:22,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:08:22,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:08:22,794 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-02 22:08:22,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:08:22,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575049765] [2021-11-02 22:08:22,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575049765] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:22,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593656459] [2021-11-02 22:08:22,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:08:22,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:08:22,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:08:22,797 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:08:22,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-02 22:08:23,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-02 22:08:23,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:08:23,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-02 22:08:23,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:08:23,762 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-02 22:08:23,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593656459] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:23,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:08:23,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-11-02 22:08:23,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585366446] [2021-11-02 22:08:23,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 22:08:23,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:08:23,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 22:08:23,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:08:23,765 INFO L87 Difference]: Start difference. First operand 253 states and 327 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:24,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:08:24,384 INFO L93 Difference]: Finished difference Result 329 states and 422 transitions. [2021-11-02 22:08:24,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 22:08:24,384 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-02 22:08:24,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:08:24,386 INFO L225 Difference]: With dead ends: 329 [2021-11-02 22:08:24,386 INFO L226 Difference]: Without dead ends: 302 [2021-11-02 22:08:24,387 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 22:08:24,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-11-02 22:08:24,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 261. [2021-11-02 22:08:24,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 259 states have (on average 1.2972972972972974) internal successors, (336), 260 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:24,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 336 transitions. [2021-11-02 22:08:24,452 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 336 transitions. Word has length 40 [2021-11-02 22:08:24,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:08:24,452 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 336 transitions. [2021-11-02 22:08:24,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:24,453 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 336 transitions. [2021-11-02 22:08:24,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-02 22:08:24,454 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:08:24,454 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:08:24,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-02 22:08:24,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-02 22:08:24,660 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:08:24,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:08:24,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1854698595, now seen corresponding path program 2 times [2021-11-02 22:08:24,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:08:24,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896250095] [2021-11-02 22:08:24,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:08:24,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:08:24,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:08:25,130 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-02 22:08:25,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:08:25,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896250095] [2021-11-02 22:08:25,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896250095] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:25,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833082326] [2021-11-02 22:08:25,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:08:25,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:08:25,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:08:25,133 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:08:25,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-02 22:08:25,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:08:25,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:08:25,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-02 22:08:25,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:08:25,860 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 22:08:25,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 3 [2021-11-02 22:08:25,883 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 22:08:25,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833082326] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:25,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:08:25,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 14 [2021-11-02 22:08:25,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264306717] [2021-11-02 22:08:25,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:08:25,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:08:25,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:08:25,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:08:25,884 INFO L87 Difference]: Start difference. First operand 261 states and 336 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:26,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:08:26,212 INFO L93 Difference]: Finished difference Result 381 states and 483 transitions. [2021-11-02 22:08:26,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 22:08:26,213 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-02 22:08:26,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:08:26,215 INFO L225 Difference]: With dead ends: 381 [2021-11-02 22:08:26,215 INFO L226 Difference]: Without dead ends: 364 [2021-11-02 22:08:26,216 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:08:26,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-11-02 22:08:26,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 272. [2021-11-02 22:08:26,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 270 states have (on average 1.2851851851851852) internal successors, (347), 271 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:26,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 347 transitions. [2021-11-02 22:08:26,280 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 347 transitions. Word has length 41 [2021-11-02 22:08:26,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:08:26,281 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 347 transitions. [2021-11-02 22:08:26,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:26,281 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 347 transitions. [2021-11-02 22:08:26,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-02 22:08:26,282 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:08:26,282 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:08:26,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-02 22:08:26,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-02 22:08:26,482 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:08:26,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:08:26,483 INFO L85 PathProgramCache]: Analyzing trace with hash -753377904, now seen corresponding path program 1 times [2021-11-02 22:08:26,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:08:26,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353686620] [2021-11-02 22:08:26,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:08:26,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:08:26,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:08:26,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:08:26,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:08:26,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353686620] [2021-11-02 22:08:26,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353686620] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:26,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051541898] [2021-11-02 22:08:26,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:08:26,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:08:26,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:08:26,890 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:08:26,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-02 22:08:27,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:08:27,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-02 22:08:27,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:08:27,932 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 22:08:27,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051541898] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:27,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:08:27,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 22 [2021-11-02 22:08:27,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583531886] [2021-11-02 22:08:27,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 22:08:27,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:08:27,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 22:08:27,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-11-02 22:08:27,936 INFO L87 Difference]: Start difference. First operand 272 states and 347 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:29,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:08:29,004 INFO L93 Difference]: Finished difference Result 470 states and 602 transitions. [2021-11-02 22:08:29,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 22:08:29,005 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 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 42 [2021-11-02 22:08:29,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:08:29,008 INFO L225 Difference]: With dead ends: 470 [2021-11-02 22:08:29,008 INFO L226 Difference]: Without dead ends: 380 [2021-11-02 22:08:29,010 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2021-11-02 22:08:29,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-11-02 22:08:29,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 281. [2021-11-02 22:08:29,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 279 states have (on average 1.2795698924731183) internal successors, (357), 280 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:29,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 357 transitions. [2021-11-02 22:08:29,102 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 357 transitions. Word has length 42 [2021-11-02 22:08:29,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:08:29,103 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 357 transitions. [2021-11-02 22:08:29,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:29,103 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 357 transitions. [2021-11-02 22:08:29,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-02 22:08:29,104 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:08:29,105 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:08:29,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-02 22:08:29,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:08:29,319 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:08:29,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:08:29,320 INFO L85 PathProgramCache]: Analyzing trace with hash -24475275, now seen corresponding path program 2 times [2021-11-02 22:08:29,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:08:29,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173228383] [2021-11-02 22:08:29,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:08:29,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:08:29,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:08:29,758 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-02 22:08:29,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:08:29,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173228383] [2021-11-02 22:08:29,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173228383] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:29,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332909040] [2021-11-02 22:08:29,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:08:29,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:08:29,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:08:29,761 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:08:29,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-02 22:08:30,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:08:30,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:08:30,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 22:08:30,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:08:30,673 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-02 22:08:30,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332909040] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:30,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:08:30,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-11-02 22:08:30,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436581104] [2021-11-02 22:08:30,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 22:08:30,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:08:30,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 22:08:30,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:08:30,677 INFO L87 Difference]: Start difference. First operand 281 states and 357 transitions. Second operand has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:32,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:08:32,490 INFO L93 Difference]: Finished difference Result 721 states and 914 transitions. [2021-11-02 22:08:32,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 22:08:32,490 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-02 22:08:32,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:08:32,496 INFO L225 Difference]: With dead ends: 721 [2021-11-02 22:08:32,496 INFO L226 Difference]: Without dead ends: 714 [2021-11-02 22:08:32,499 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=270, Invalid=1452, Unknown=0, NotChecked=0, Total=1722 [2021-11-02 22:08:32,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-11-02 22:08:32,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 233. [2021-11-02 22:08:32,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 231 states have (on average 1.2683982683982684) internal successors, (293), 232 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:32,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 293 transitions. [2021-11-02 22:08:32,570 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 293 transitions. Word has length 43 [2021-11-02 22:08:32,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:08:32,570 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 293 transitions. [2021-11-02 22:08:32,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:32,570 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 293 transitions. [2021-11-02 22:08:32,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-02 22:08:32,571 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:08:32,571 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:08:32,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-02 22:08:32,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:08:32,775 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:08:32,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:08:32,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1910802244, now seen corresponding path program 3 times [2021-11-02 22:08:32,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:08:32,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547703368] [2021-11-02 22:08:32,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:08:32,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:08:32,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:08:33,412 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-02 22:08:33,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:08:33,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547703368] [2021-11-02 22:08:33,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547703368] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:33,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809908493] [2021-11-02 22:08:33,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:08:33,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:08:33,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:08:33,415 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:08:33,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-02 22:08:34,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-02 22:08:34,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:08:34,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-02 22:08:34,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:08:34,806 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 22:08:34,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-11-02 22:08:34,863 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-02 22:08:34,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809908493] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:34,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:08:34,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-11-02 22:08:34,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227707435] [2021-11-02 22:08:34,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 22:08:34,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:08:34,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 22:08:34,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:08:34,866 INFO L87 Difference]: Start difference. First operand 233 states and 293 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:43,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:08:43,430 INFO L93 Difference]: Finished difference Result 648 states and 815 transitions. [2021-11-02 22:08:43,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 22:08:43,430 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 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 44 [2021-11-02 22:08:43,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:08:43,433 INFO L225 Difference]: With dead ends: 648 [2021-11-02 22:08:43,434 INFO L226 Difference]: Without dead ends: 495 [2021-11-02 22:08:43,435 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=305, Invalid=1765, Unknown=0, NotChecked=0, Total=2070 [2021-11-02 22:08:43,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-11-02 22:08:43,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 251. [2021-11-02 22:08:43,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 249 states have (on average 1.248995983935743) internal successors, (311), 250 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:43,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 311 transitions. [2021-11-02 22:08:43,519 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 311 transitions. Word has length 44 [2021-11-02 22:08:43,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:08:43,519 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 311 transitions. [2021-11-02 22:08:43,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:43,520 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 311 transitions. [2021-11-02 22:08:43,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-02 22:08:43,520 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:08:43,521 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:08:43,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-02 22:08:43,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:08:43,727 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:08:43,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:08:43,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1360474984, now seen corresponding path program 1 times [2021-11-02 22:08:43,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:08:43,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717583661] [2021-11-02 22:08:43,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:08:43,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:08:43,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:08:43,853 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-02 22:08:43,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:08:43,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717583661] [2021-11-02 22:08:43,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717583661] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:43,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099188353] [2021-11-02 22:08:43,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:08:43,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:08:43,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:08:43,857 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:08:43,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-02 22:08:44,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:08:44,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 22:08:44,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:08:44,933 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-02 22:08:44,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099188353] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:44,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:08:44,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-11-02 22:08:44,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181106678] [2021-11-02 22:08:44,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 22:08:44,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:08:44,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 22:08:44,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2021-11-02 22:08:44,936 INFO L87 Difference]: Start difference. First operand 251 states and 311 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:45,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:08:45,554 INFO L93 Difference]: Finished difference Result 433 states and 532 transitions. [2021-11-02 22:08:45,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 22:08:45,555 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 0 states have call successors, (0), 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 44 [2021-11-02 22:08:45,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:08:45,556 INFO L225 Difference]: With dead ends: 433 [2021-11-02 22:08:45,557 INFO L226 Difference]: Without dead ends: 344 [2021-11-02 22:08:45,557 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-11-02 22:08:45,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-11-02 22:08:45,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 254. [2021-11-02 22:08:45,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 252 states have (on average 1.253968253968254) internal successors, (316), 253 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:45,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 316 transitions. [2021-11-02 22:08:45,661 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 316 transitions. Word has length 44 [2021-11-02 22:08:45,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:08:45,661 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 316 transitions. [2021-11-02 22:08:45,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:45,661 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 316 transitions. [2021-11-02 22:08:45,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-02 22:08:45,662 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:08:45,663 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:08:45,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-02 22:08:45,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-02 22:08:45,878 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:08:45,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:08:45,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1749753544, now seen corresponding path program 1 times [2021-11-02 22:08:45,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:08:45,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847436735] [2021-11-02 22:08:45,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:08:45,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:08:45,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:08:46,114 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-02 22:08:46,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:08:46,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847436735] [2021-11-02 22:08:46,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847436735] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:46,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385841858] [2021-11-02 22:08:46,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:08:46,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:08:46,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:08:46,118 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:08:46,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-02 22:08:46,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:08:46,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 22:08:46,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:08:46,887 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 22:08:46,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385841858] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:46,888 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:08:46,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-02 22:08:46,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333061888] [2021-11-02 22:08:46,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 22:08:46,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:08:46,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 22:08:46,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:08:46,890 INFO L87 Difference]: Start difference. First operand 254 states and 316 transitions. Second operand has 16 states, 16 states have (on average 4.625) internal successors, (74), 16 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:47,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:08:47,552 INFO L93 Difference]: Finished difference Result 350 states and 423 transitions. [2021-11-02 22:08:47,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 22:08:47,553 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.625) internal successors, (74), 16 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-02 22:08:47,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:08:47,554 INFO L225 Difference]: With dead ends: 350 [2021-11-02 22:08:47,554 INFO L226 Difference]: Without dead ends: 277 [2021-11-02 22:08:47,555 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=197, Invalid=733, Unknown=0, NotChecked=0, Total=930 [2021-11-02 22:08:47,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-11-02 22:08:47,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 254. [2021-11-02 22:08:47,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 252 states have (on average 1.242063492063492) internal successors, (313), 253 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:47,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 313 transitions. [2021-11-02 22:08:47,650 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 313 transitions. Word has length 45 [2021-11-02 22:08:47,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:08:47,650 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 313 transitions. [2021-11-02 22:08:47,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.625) internal successors, (74), 16 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:47,650 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 313 transitions. [2021-11-02 22:08:47,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-02 22:08:47,652 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:08:47,652 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:08:47,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-02 22:08:47,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-02 22:08:47,860 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:08:47,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:08:47,860 INFO L85 PathProgramCache]: Analyzing trace with hash -593353654, now seen corresponding path program 4 times [2021-11-02 22:08:47,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:08:47,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713729300] [2021-11-02 22:08:47,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:08:47,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:08:47,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:08:48,728 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 22:08:48,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:08:48,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713729300] [2021-11-02 22:08:48,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713729300] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:48,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894099675] [2021-11-02 22:08:48,729 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:08:48,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:08:48,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:08:48,735 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:08:48,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-02 22:08:49,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:08:49,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:08:49,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-02 22:08:49,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:08:50,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:08:50,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:08:50,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:08:50,067 INFO L354 Elim1Store]: treesize reduction 19, result has 70.3 percent of original size [2021-11-02 22:08:50,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 79 [2021-11-02 22:08:50,145 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 22:08:50,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894099675] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:50,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:08:50,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-11-02 22:08:50,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123580997] [2021-11-02 22:08:50,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-02 22:08:50,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:08:50,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-02 22:08:50,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2021-11-02 22:08:50,150 INFO L87 Difference]: Start difference. First operand 254 states and 313 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 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) [2021-11-02 22:08:51,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:08:51,430 INFO L93 Difference]: Finished difference Result 469 states and 578 transitions. [2021-11-02 22:08:51,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 22:08:51,431 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 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 46 [2021-11-02 22:08:51,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:08:51,433 INFO L225 Difference]: With dead ends: 469 [2021-11-02 22:08:51,433 INFO L226 Difference]: Without dead ends: 379 [2021-11-02 22:08:51,434 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=281, Invalid=1881, Unknown=0, NotChecked=0, Total=2162 [2021-11-02 22:08:51,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-11-02 22:08:51,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 264. [2021-11-02 22:08:51,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 262 states have (on average 1.2404580152671756) internal successors, (325), 263 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:51,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 325 transitions. [2021-11-02 22:08:51,545 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 325 transitions. Word has length 46 [2021-11-02 22:08:51,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:08:51,545 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 325 transitions. [2021-11-02 22:08:51,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 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) [2021-11-02 22:08:51,546 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 325 transitions. [2021-11-02 22:08:51,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-02 22:08:51,547 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:08:51,547 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:08:51,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-02 22:08:51,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:08:51,748 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:08:51,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:08:51,748 INFO L85 PathProgramCache]: Analyzing trace with hash -902930382, now seen corresponding path program 5 times [2021-11-02 22:08:51,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:08:51,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182420384] [2021-11-02 22:08:51,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:08:51,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:08:51,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:08:52,466 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 22:08:52,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:08:52,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182420384] [2021-11-02 22:08:52,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182420384] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:52,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096121439] [2021-11-02 22:08:52,467 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:08:52,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:08:52,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:08:52,469 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:08:52,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-02 22:08:53,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-02 22:08:53,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:08:53,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-02 22:08:53,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:08:54,258 INFO L354 Elim1Store]: treesize reduction 97, result has 28.7 percent of original size [2021-11-02 22:08:54,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 73 [2021-11-02 22:08:54,328 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 22:08:54,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096121439] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:54,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:08:54,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-11-02 22:08:54,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575867789] [2021-11-02 22:08:54,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-02 22:08:54,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:08:54,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-02 22:08:54,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1003, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 22:08:54,330 INFO L87 Difference]: Start difference. First operand 264 states and 325 transitions. Second operand has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 34 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) [2021-11-02 22:08:55,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:08:55,614 INFO L93 Difference]: Finished difference Result 420 states and 521 transitions. [2021-11-02 22:08:55,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 22:08:55,615 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 34 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 46 [2021-11-02 22:08:55,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:08:55,617 INFO L225 Difference]: With dead ends: 420 [2021-11-02 22:08:55,618 INFO L226 Difference]: Without dead ends: 395 [2021-11-02 22:08:55,619 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=252, Invalid=1910, Unknown=0, NotChecked=0, Total=2162 [2021-11-02 22:08:55,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-11-02 22:08:55,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 276. [2021-11-02 22:08:55,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 274 states have (on average 1.2408759124087592) internal successors, (340), 275 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:55,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 340 transitions. [2021-11-02 22:08:55,737 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 340 transitions. Word has length 46 [2021-11-02 22:08:55,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:08:55,738 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 340 transitions. [2021-11-02 22:08:55,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 34 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) [2021-11-02 22:08:55,738 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 340 transitions. [2021-11-02 22:08:55,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-02 22:08:55,739 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:08:55,740 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:08:55,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-02 22:08:55,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-02 22:08:55,948 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:08:55,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:08:55,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1285581717, now seen corresponding path program 1 times [2021-11-02 22:08:55,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:08:55,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638399881] [2021-11-02 22:08:55,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:08:55,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:08:56,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:08:56,158 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-02 22:08:56,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:08:56,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638399881] [2021-11-02 22:08:56,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638399881] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:56,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724138290] [2021-11-02 22:08:56,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:08:56,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:08:56,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:08:56,160 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:08:56,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-02 22:08:56,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:08:56,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 22:08:56,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:08:57,061 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-02 22:08:57,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724138290] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:57,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:08:57,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2021-11-02 22:08:57,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679063332] [2021-11-02 22:08:57,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 22:08:57,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:08:57,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 22:08:57,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:08:57,066 INFO L87 Difference]: Start difference. First operand 276 states and 340 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:57,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:08:57,585 INFO L93 Difference]: Finished difference Result 577 states and 702 transitions. [2021-11-02 22:08:57,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 22:08:57,586 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-02 22:08:57,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:08:57,588 INFO L225 Difference]: With dead ends: 577 [2021-11-02 22:08:57,588 INFO L226 Difference]: Without dead ends: 487 [2021-11-02 22:08:57,589 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:08:57,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-11-02 22:08:57,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 259. [2021-11-02 22:08:57,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 257 states have (on average 1.245136186770428) internal successors, (320), 258 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:57,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 320 transitions. [2021-11-02 22:08:57,667 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 320 transitions. Word has length 48 [2021-11-02 22:08:57,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:08:57,667 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 320 transitions. [2021-11-02 22:08:57,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:57,668 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 320 transitions. [2021-11-02 22:08:57,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-02 22:08:57,669 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:08:57,669 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:08:57,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-02 22:08:57,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:08:57,876 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:08:57,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:08:57,877 INFO L85 PathProgramCache]: Analyzing trace with hash 378762372, now seen corresponding path program 4 times [2021-11-02 22:08:57,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:08:57,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107236235] [2021-11-02 22:08:57,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:08:57,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:08:57,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:08:58,073 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-02 22:08:58,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:08:58,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107236235] [2021-11-02 22:08:58,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107236235] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:58,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109331458] [2021-11-02 22:08:58,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:08:58,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:08:58,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:08:58,079 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:08:58,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-02 22:08:59,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:08:59,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:08:59,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-02 22:08:59,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:08:59,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-02 22:08:59,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:08:59,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-02 22:08:59,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-02 22:08:59,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:08:59,917 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-02 22:08:59,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 15 [2021-11-02 22:08:59,950 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:08:59,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109331458] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:59,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:08:59,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 20] total 29 [2021-11-02 22:08:59,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117687547] [2021-11-02 22:08:59,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 22:08:59,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:08:59,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 22:08:59,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-11-02 22:08:59,953 INFO L87 Difference]: Start difference. First operand 259 states and 320 transitions. Second operand has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 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) [2021-11-02 22:09:04,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:09:04,117 INFO L93 Difference]: Finished difference Result 1468 states and 1832 transitions. [2021-11-02 22:09:04,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-02 22:09:04,117 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 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 48 [2021-11-02 22:09:04,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:09:04,124 INFO L225 Difference]: With dead ends: 1468 [2021-11-02 22:09:04,125 INFO L226 Difference]: Without dead ends: 1230 [2021-11-02 22:09:04,128 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2122 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=931, Invalid=6901, Unknown=0, NotChecked=0, Total=7832 [2021-11-02 22:09:04,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2021-11-02 22:09:04,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 401. [2021-11-02 22:09:04,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 399 states have (on average 1.2581453634085213) internal successors, (502), 400 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:04,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 502 transitions. [2021-11-02 22:09:04,295 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 502 transitions. Word has length 48 [2021-11-02 22:09:04,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:09:04,295 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 502 transitions. [2021-11-02 22:09:04,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 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) [2021-11-02 22:09:04,296 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 502 transitions. [2021-11-02 22:09:04,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-02 22:09:04,297 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:09:04,297 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:09:04,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-02 22:09:04,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-02 22:09:04,511 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:09:04,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:09:04,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1492854075, now seen corresponding path program 6 times [2021-11-02 22:09:04,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:09:04,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219608853] [2021-11-02 22:09:04,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:04,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:09:04,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:05,219 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-02 22:09:05,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:09:05,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219608853] [2021-11-02 22:09:05,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219608853] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:09:05,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486698757] [2021-11-02 22:09:05,219 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:09:05,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:09:05,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:09:05,220 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:09:05,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-02 22:09:06,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-02 22:09:06,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:09:06,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-02 22:09:06,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:09:07,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:09:07,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:09:07,217 INFO L354 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2021-11-02 22:09:07,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 37 [2021-11-02 22:09:07,262 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-02 22:09:07,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486698757] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:09:07,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:09:07,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 25 [2021-11-02 22:09:07,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448023284] [2021-11-02 22:09:07,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:09:07,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:09:07,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:09:07,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:09:07,264 INFO L87 Difference]: Start difference. First operand 401 states and 502 transitions. Second operand has 25 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:10,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:09:10,246 INFO L93 Difference]: Finished difference Result 789 states and 975 transitions. [2021-11-02 22:09:10,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 22:09:10,246 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-02 22:09:10,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:09:10,249 INFO L225 Difference]: With dead ends: 789 [2021-11-02 22:09:10,249 INFO L226 Difference]: Without dead ends: 621 [2021-11-02 22:09:10,250 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=297, Invalid=2153, Unknown=0, NotChecked=0, Total=2450 [2021-11-02 22:09:10,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-11-02 22:09:10,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 338. [2021-11-02 22:09:10,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 336 states have (on average 1.2351190476190477) internal successors, (415), 337 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:10,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 415 transitions. [2021-11-02 22:09:10,349 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 415 transitions. Word has length 49 [2021-11-02 22:09:10,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:09:10,350 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 415 transitions. [2021-11-02 22:09:10,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:10,350 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 415 transitions. [2021-11-02 22:09:10,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-02 22:09:10,351 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:09:10,351 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:09:10,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-11-02 22:09:10,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:09:10,551 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:09:10,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:09:10,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1479814538, now seen corresponding path program 3 times [2021-11-02 22:09:10,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:09:10,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444105932] [2021-11-02 22:09:10,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:10,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:09:10,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:10,695 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-02 22:09:10,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:09:10,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444105932] [2021-11-02 22:09:10,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444105932] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:09:10,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002088494] [2021-11-02 22:09:10,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:09:10,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:09:10,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:09:10,698 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:09:10,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-02 22:09:12,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-02 22:09:12,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:09:12,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-02 22:09:12,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:09:13,252 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 36 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-02 22:09:13,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002088494] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:09:13,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:09:13,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 24 [2021-11-02 22:09:13,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486546509] [2021-11-02 22:09:13,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 22:09:13,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:09:13,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 22:09:13,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:09:13,254 INFO L87 Difference]: Start difference. First operand 338 states and 415 transitions. Second operand has 24 states, 24 states have (on average 3.5) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:14,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:09:14,200 INFO L93 Difference]: Finished difference Result 399 states and 489 transitions. [2021-11-02 22:09:14,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-02 22:09:14,201 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.5) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 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 50 [2021-11-02 22:09:14,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:09:14,202 INFO L225 Difference]: With dead ends: 399 [2021-11-02 22:09:14,202 INFO L226 Difference]: Without dead ends: 347 [2021-11-02 22:09:14,203 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=186, Invalid=1296, Unknown=0, NotChecked=0, Total=1482 [2021-11-02 22:09:14,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-11-02 22:09:14,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 331. [2021-11-02 22:09:14,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 329 states have (on average 1.243161094224924) internal successors, (409), 330 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:14,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 409 transitions. [2021-11-02 22:09:14,327 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 409 transitions. Word has length 50 [2021-11-02 22:09:14,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:09:14,327 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 409 transitions. [2021-11-02 22:09:14,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.5) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:14,327 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 409 transitions. [2021-11-02 22:09:14,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-02 22:09:14,328 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:09:14,329 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:09:14,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-02 22:09:14,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-02 22:09:14,536 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:09:14,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:09:14,536 INFO L85 PathProgramCache]: Analyzing trace with hash -670831401, now seen corresponding path program 2 times [2021-11-02 22:09:14,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:09:14,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302257962] [2021-11-02 22:09:14,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:14,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:09:14,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:15,356 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-02 22:09:15,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:09:15,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302257962] [2021-11-02 22:09:15,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302257962] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:09:15,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865658392] [2021-11-02 22:09:15,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:09:15,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:09:15,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:09:15,358 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:09:15,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-02 22:09:16,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:09:16,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:09:16,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-02 22:09:16,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:09:16,653 INFO L354 Elim1Store]: treesize reduction 94, result has 6.9 percent of original size [2021-11-02 22:09:16,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 26 [2021-11-02 22:09:16,699 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-02 22:09:16,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865658392] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:09:16,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:09:16,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 28 [2021-11-02 22:09:16,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191735031] [2021-11-02 22:09:16,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-02 22:09:16,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:09:16,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-02 22:09:16,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-11-02 22:09:16,701 INFO L87 Difference]: Start difference. First operand 331 states and 409 transitions. Second operand has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 28 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) [2021-11-02 22:09:26,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:09:26,702 INFO L93 Difference]: Finished difference Result 2068 states and 2541 transitions. [2021-11-02 22:09:26,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-11-02 22:09:26,703 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 28 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 50 [2021-11-02 22:09:26,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:09:26,713 INFO L225 Difference]: With dead ends: 2068 [2021-11-02 22:09:26,713 INFO L226 Difference]: Without dead ends: 1972 [2021-11-02 22:09:26,718 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4759 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=1999, Invalid=13007, Unknown=0, NotChecked=0, Total=15006 [2021-11-02 22:09:26,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1972 states. [2021-11-02 22:09:26,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1972 to 397. [2021-11-02 22:09:26,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 395 states have (on average 1.230379746835443) internal successors, (486), 396 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:26,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 486 transitions. [2021-11-02 22:09:26,870 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 486 transitions. Word has length 50 [2021-11-02 22:09:26,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:09:26,870 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 486 transitions. [2021-11-02 22:09:26,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 28 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) [2021-11-02 22:09:26,870 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 486 transitions. [2021-11-02 22:09:26,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-02 22:09:26,872 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:09:26,872 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:09:26,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-02 22:09:27,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-02 22:09:27,079 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:09:27,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:09:27,079 INFO L85 PathProgramCache]: Analyzing trace with hash -2103976513, now seen corresponding path program 7 times [2021-11-02 22:09:27,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:09:27,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719773121] [2021-11-02 22:09:27,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:27,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:09:27,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-02 22:09:27,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:09:27,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719773121] [2021-11-02 22:09:27,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719773121] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:09:27,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78520600] [2021-11-02 22:09:27,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:09:27,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:09:27,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:09:27,355 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:09:27,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-02 22:09:28,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:28,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-02 22:09:28,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:09:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-02 22:09:28,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78520600] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:09:28,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:09:28,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-11-02 22:09:28,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131929361] [2021-11-02 22:09:28,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 22:09:28,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:09:28,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 22:09:28,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-11-02 22:09:28,912 INFO L87 Difference]: Start difference. First operand 397 states and 486 transitions. Second operand has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 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) [2021-11-02 22:09:31,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:09:31,314 INFO L93 Difference]: Finished difference Result 1352 states and 1650 transitions. [2021-11-02 22:09:31,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-02 22:09:31,315 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 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 51 [2021-11-02 22:09:31,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:09:31,319 INFO L225 Difference]: With dead ends: 1352 [2021-11-02 22:09:31,319 INFO L226 Difference]: Without dead ends: 1255 [2021-11-02 22:09:31,325 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=726, Invalid=3564, Unknown=0, NotChecked=0, Total=4290 [2021-11-02 22:09:31,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2021-11-02 22:09:31,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 492. [2021-11-02 22:09:31,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 490 states have (on average 1.2428571428571429) internal successors, (609), 491 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:31,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 609 transitions. [2021-11-02 22:09:31,516 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 609 transitions. Word has length 51 [2021-11-02 22:09:31,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:09:31,516 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 609 transitions. [2021-11-02 22:09:31,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 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) [2021-11-02 22:09:31,516 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 609 transitions. [2021-11-02 22:09:31,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-02 22:09:31,518 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:09:31,518 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:09:31,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-02 22:09:31,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:09:31,725 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:09:31,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:09:31,726 INFO L85 PathProgramCache]: Analyzing trace with hash 791033853, now seen corresponding path program 5 times [2021-11-02 22:09:31,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:09:31,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361636544] [2021-11-02 22:09:31,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:31,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:09:31,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:32,340 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-02 22:09:32,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:09:32,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361636544] [2021-11-02 22:09:32,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361636544] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:09:32,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688764237] [2021-11-02 22:09:32,341 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:09:32,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:09:32,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:09:32,341 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:09:32,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-02 22:09:35,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-02 22:09:35,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:09:35,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-02 22:09:35,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:09:35,808 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-02 22:09:35,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688764237] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:09:35,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:09:35,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 33 [2021-11-02 22:09:35,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506600315] [2021-11-02 22:09:35,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-02 22:09:35,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:09:35,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-02 22:09:35,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 22:09:35,810 INFO L87 Difference]: Start difference. First operand 492 states and 609 transitions. Second operand has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:39,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:09:39,275 INFO L93 Difference]: Finished difference Result 1562 states and 1925 transitions. [2021-11-02 22:09:39,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-02 22:09:39,275 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 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 53 [2021-11-02 22:09:39,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:09:39,280 INFO L225 Difference]: With dead ends: 1562 [2021-11-02 22:09:39,280 INFO L226 Difference]: Without dead ends: 1316 [2021-11-02 22:09:39,281 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=544, Invalid=3746, Unknown=0, NotChecked=0, Total=4290 [2021-11-02 22:09:39,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2021-11-02 22:09:39,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 605. [2021-11-02 22:09:39,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 603 states have (on average 1.2553897180762852) internal successors, (757), 604 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:39,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 757 transitions. [2021-11-02 22:09:39,517 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 757 transitions. Word has length 53 [2021-11-02 22:09:39,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:09:39,517 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 757 transitions. [2021-11-02 22:09:39,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:39,518 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 757 transitions. [2021-11-02 22:09:39,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-02 22:09:39,519 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:09:39,519 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:09:39,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-11-02 22:09:39,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-02 22:09:39,720 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:09:39,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:09:39,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1614935007, now seen corresponding path program 1 times [2021-11-02 22:09:39,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:09:39,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37659897] [2021-11-02 22:09:39,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:39,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:09:39,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:40,309 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 22:09:40,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:09:40,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37659897] [2021-11-02 22:09:40,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37659897] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:09:40,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853039614] [2021-11-02 22:09:40,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:40,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:09:40,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:09:40,311 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:09:40,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-02 22:09:41,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:41,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-02 22:09:41,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:09:41,678 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 22:09:41,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853039614] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:09:41,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:09:41,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-11-02 22:09:41,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702251009] [2021-11-02 22:09:41,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-02 22:09:41,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:09:41,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-02 22:09:41,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-11-02 22:09:41,680 INFO L87 Difference]: Start difference. First operand 605 states and 757 transitions. Second operand has 32 states, 32 states have (on average 3.125) internal successors, (100), 32 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) [2021-11-02 22:09:43,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:09:43,151 INFO L93 Difference]: Finished difference Result 1073 states and 1356 transitions. [2021-11-02 22:09:43,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 22:09:43,152 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.125) internal successors, (100), 32 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 54 [2021-11-02 22:09:43,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:09:43,156 INFO L225 Difference]: With dead ends: 1073 [2021-11-02 22:09:43,156 INFO L226 Difference]: Without dead ends: 930 [2021-11-02 22:09:43,157 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=238, Invalid=1654, Unknown=0, NotChecked=0, Total=1892 [2021-11-02 22:09:43,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-11-02 22:09:43,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 626. [2021-11-02 22:09:43,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 624 states have (on average 1.2467948717948718) internal successors, (778), 625 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:43,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 778 transitions. [2021-11-02 22:09:43,385 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 778 transitions. Word has length 54 [2021-11-02 22:09:43,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:09:43,385 INFO L470 AbstractCegarLoop]: Abstraction has 626 states and 778 transitions. [2021-11-02 22:09:43,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.125) internal successors, (100), 32 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) [2021-11-02 22:09:43,385 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 778 transitions. [2021-11-02 22:09:43,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-02 22:09:43,386 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:09:43,386 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:09:43,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-11-02 22:09:43,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:09:43,587 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:09:43,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:09:43,587 INFO L85 PathProgramCache]: Analyzing trace with hash -185465139, now seen corresponding path program 2 times [2021-11-02 22:09:43,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:09:43,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527397368] [2021-11-02 22:09:43,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:43,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:09:43,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:44,082 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-02 22:09:44,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:09:44,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527397368] [2021-11-02 22:09:44,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527397368] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:09:44,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804063111] [2021-11-02 22:09:44,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:09:44,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:09:44,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:09:44,084 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:09:44,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-02 22:09:45,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:09:45,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:09:45,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-02 22:09:45,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:09:45,375 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-02 22:09:45,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804063111] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:09:45,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:09:45,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 14 [2021-11-02 22:09:45,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525594590] [2021-11-02 22:09:45,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:09:45,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:09:45,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:09:45,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:09:45,377 INFO L87 Difference]: Start difference. First operand 626 states and 778 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:45,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:09:45,940 INFO L93 Difference]: Finished difference Result 762 states and 952 transitions. [2021-11-02 22:09:45,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:09:45,941 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-02 22:09:45,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:09:45,943 INFO L225 Difference]: With dead ends: 762 [2021-11-02 22:09:45,944 INFO L226 Difference]: Without dead ends: 742 [2021-11-02 22:09:45,947 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:09:45,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-11-02 22:09:46,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 626. [2021-11-02 22:09:46,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 624 states have (on average 1.2451923076923077) internal successors, (777), 625 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:46,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 777 transitions. [2021-11-02 22:09:46,200 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 777 transitions. Word has length 54 [2021-11-02 22:09:46,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:09:46,201 INFO L470 AbstractCegarLoop]: Abstraction has 626 states and 777 transitions. [2021-11-02 22:09:46,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:46,201 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 777 transitions. [2021-11-02 22:09:46,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-02 22:09:46,203 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:09:46,203 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:09:46,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-11-02 22:09:46,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:09:46,410 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:09:46,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:09:46,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1829279124, now seen corresponding path program 1 times [2021-11-02 22:09:46,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:09:46,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7410940] [2021-11-02 22:09:46,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:46,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:09:46,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:46,452 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-02 22:09:46,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:09:46,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7410940] [2021-11-02 22:09:46,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7410940] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:09:46,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:09:46,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:09:46,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129636487] [2021-11-02 22:09:46,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:09:46,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:09:46,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:09:46,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:09:46,455 INFO L87 Difference]: Start difference. First operand 626 states and 777 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:46,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:09:46,738 INFO L93 Difference]: Finished difference Result 641 states and 795 transitions. [2021-11-02 22:09:46,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:09:46,739 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 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 54 [2021-11-02 22:09:46,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:09:46,742 INFO L225 Difference]: With dead ends: 641 [2021-11-02 22:09:46,742 INFO L226 Difference]: Without dead ends: 628 [2021-11-02 22:09:46,742 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:09:46,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-11-02 22:09:46,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 626. [2021-11-02 22:09:46,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 624 states have (on average 1.2419871794871795) internal successors, (775), 625 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:46,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 775 transitions. [2021-11-02 22:09:46,973 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 775 transitions. Word has length 54 [2021-11-02 22:09:46,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:09:46,973 INFO L470 AbstractCegarLoop]: Abstraction has 626 states and 775 transitions. [2021-11-02 22:09:46,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:46,973 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 775 transitions. [2021-11-02 22:09:46,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-02 22:09:46,975 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:09:46,976 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:09:46,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-11-02 22:09:46,976 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:09:46,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:09:46,977 INFO L85 PathProgramCache]: Analyzing trace with hash 151351868, now seen corresponding path program 2 times [2021-11-02 22:09:46,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:09:46,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818560413] [2021-11-02 22:09:46,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:46,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:09:47,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:47,126 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-02 22:09:47,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:09:47,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818560413] [2021-11-02 22:09:47,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818560413] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:09:47,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564674166] [2021-11-02 22:09:47,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:09:47,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:09:47,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:09:47,135 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:09:47,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-02 22:09:48,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:09:48,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:09:48,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 22:09:48,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:09:48,297 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-02 22:09:48,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564674166] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:09:48,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:09:48,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-11-02 22:09:48,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673903120] [2021-11-02 22:09:48,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:09:48,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:09:48,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:09:48,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:09:48,299 INFO L87 Difference]: Start difference. First operand 626 states and 775 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:48,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:09:48,695 INFO L93 Difference]: Finished difference Result 672 states and 835 transitions. [2021-11-02 22:09:48,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:09:48,695 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-02 22:09:48,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:09:48,699 INFO L225 Difference]: With dead ends: 672 [2021-11-02 22:09:48,699 INFO L226 Difference]: Without dead ends: 661 [2021-11-02 22:09:48,700 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:09:48,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2021-11-02 22:09:48,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 644. [2021-11-02 22:09:48,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 642 states have (on average 1.2445482866043613) internal successors, (799), 643 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:48,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 799 transitions. [2021-11-02 22:09:48,966 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 799 transitions. Word has length 54 [2021-11-02 22:09:48,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:09:48,966 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 799 transitions. [2021-11-02 22:09:48,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:48,966 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 799 transitions. [2021-11-02 22:09:48,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-02 22:09:48,967 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:09:48,968 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:09:48,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-11-02 22:09:49,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:09:49,170 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:09:49,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:09:49,170 INFO L85 PathProgramCache]: Analyzing trace with hash 454150792, now seen corresponding path program 2 times [2021-11-02 22:09:49,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:09:49,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546643098] [2021-11-02 22:09:49,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:49,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:09:49,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:49,258 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-02 22:09:49,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:09:49,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546643098] [2021-11-02 22:09:49,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546643098] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:09:49,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:09:49,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:09:49,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458189328] [2021-11-02 22:09:49,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:09:49,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:09:49,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:09:49,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:09:49,261 INFO L87 Difference]: Start difference. First operand 644 states and 799 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:49,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:09:49,692 INFO L93 Difference]: Finished difference Result 668 states and 827 transitions. [2021-11-02 22:09:49,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:09:49,692 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 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 55 [2021-11-02 22:09:49,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:09:49,696 INFO L225 Difference]: With dead ends: 668 [2021-11-02 22:09:49,696 INFO L226 Difference]: Without dead ends: 655 [2021-11-02 22:09:49,697 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:09:49,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-11-02 22:09:50,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 648. [2021-11-02 22:09:50,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 646 states have (on average 1.243034055727554) internal successors, (803), 647 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:50,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 803 transitions. [2021-11-02 22:09:50,059 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 803 transitions. Word has length 55 [2021-11-02 22:09:50,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:09:50,060 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 803 transitions. [2021-11-02 22:09:50,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:50,060 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 803 transitions. [2021-11-02 22:09:50,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-02 22:09:50,062 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:09:50,062 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:09:50,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-11-02 22:09:50,062 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:09:50,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:09:50,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1668489116, now seen corresponding path program 3 times [2021-11-02 22:09:50,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:09:50,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507772762] [2021-11-02 22:09:50,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:50,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:09:50,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:50,768 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-02 22:09:50,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:09:50,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507772762] [2021-11-02 22:09:50,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507772762] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:09:50,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237219582] [2021-11-02 22:09:50,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:09:50,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:09:50,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:09:50,774 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:09:50,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-02 22:09:51,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-02 22:09:51,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:09:51,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 22:09:51,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:09:52,404 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-02 22:09:52,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237219582] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:09:52,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:09:52,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11] total 30 [2021-11-02 22:09:52,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334360511] [2021-11-02 22:09:52,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-02 22:09:52,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:09:52,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-02 22:09:52,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-11-02 22:09:52,405 INFO L87 Difference]: Start difference. First operand 648 states and 803 transitions. Second operand has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 30 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:58,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:09:58,942 INFO L93 Difference]: Finished difference Result 3159 states and 3799 transitions. [2021-11-02 22:09:58,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-11-02 22:09:58,942 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 30 states have internal predecessors, (88), 0 states have call successors, (0), 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 55 [2021-11-02 22:09:58,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:09:58,952 INFO L225 Difference]: With dead ends: 3159 [2021-11-02 22:09:58,953 INFO L226 Difference]: Without dead ends: 2955 [2021-11-02 22:09:58,954 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2998 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1029, Invalid=8871, Unknown=0, NotChecked=0, Total=9900 [2021-11-02 22:09:58,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2021-11-02 22:09:59,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 626. [2021-11-02 22:09:59,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 624 states have (on average 1.2387820512820513) internal successors, (773), 625 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:59,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 773 transitions. [2021-11-02 22:09:59,202 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 773 transitions. Word has length 55 [2021-11-02 22:09:59,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:09:59,202 INFO L470 AbstractCegarLoop]: Abstraction has 626 states and 773 transitions. [2021-11-02 22:09:59,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 30 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:59,202 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 773 transitions. [2021-11-02 22:09:59,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-02 22:09:59,204 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:09:59,204 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:09:59,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-11-02 22:09:59,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-02 22:09:59,411 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:09:59,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:09:59,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1724317637, now seen corresponding path program 6 times [2021-11-02 22:09:59,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:09:59,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886005364] [2021-11-02 22:09:59,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:59,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:09:59,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:10:00,648 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:10:00,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:10:00,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886005364] [2021-11-02 22:10:00,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886005364] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:10:00,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280588624] [2021-11-02 22:10:00,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:10:00,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:10:00,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:10:00,652 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:10:00,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-02 22:10:12,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-02 22:10:12,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:10:12,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-02 22:10:12,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:10:14,088 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 22:10:14,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280588624] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:10:14,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:10:14,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 20] total 43 [2021-11-02 22:10:14,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387698014] [2021-11-02 22:10:14,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-02 22:10:14,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:10:14,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-02 22:10:14,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1656, Unknown=0, NotChecked=0, Total=1806 [2021-11-02 22:10:14,091 INFO L87 Difference]: Start difference. First operand 626 states and 773 transitions. Second operand has 43 states, 43 states have (on average 2.2790697674418605) internal successors, (98), 43 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) [2021-11-02 22:10:25,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:10:25,210 INFO L93 Difference]: Finished difference Result 2357 states and 2868 transitions. [2021-11-02 22:10:25,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-11-02 22:10:25,210 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2790697674418605) internal successors, (98), 43 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 55 [2021-11-02 22:10:25,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:10:25,218 INFO L225 Difference]: With dead ends: 2357 [2021-11-02 22:10:25,218 INFO L226 Difference]: Without dead ends: 2352 [2021-11-02 22:10:25,220 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4009 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=1563, Invalid=12717, Unknown=0, NotChecked=0, Total=14280 [2021-11-02 22:10:25,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2352 states. [2021-11-02 22:10:25,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2352 to 629. [2021-11-02 22:10:25,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 627 states have (on average 1.2376395534290272) internal successors, (776), 628 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:10:25,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 776 transitions. [2021-11-02 22:10:25,486 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 776 transitions. Word has length 55 [2021-11-02 22:10:25,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:10:25,487 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 776 transitions. [2021-11-02 22:10:25,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2790697674418605) internal successors, (98), 43 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) [2021-11-02 22:10:25,487 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 776 transitions. [2021-11-02 22:10:25,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 22:10:25,489 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:10:25,489 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:10:25,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-02 22:10:25,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-02 22:10:25,690 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:10:25,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:10:25,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1312168522, now seen corresponding path program 1 times [2021-11-02 22:10:25,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:10:25,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907122300] [2021-11-02 22:10:25,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:10:25,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:10:25,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:10:26,203 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 22:10:26,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:10:26,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907122300] [2021-11-02 22:10:26,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907122300] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:10:26,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379238772] [2021-11-02 22:10:26,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:10:26,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:10:26,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:10:26,205 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:10:26,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-02 22:10:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:10:27,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-02 22:10:27,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:10:27,724 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 22:10:27,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379238772] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:10:27,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:10:27,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-11-02 22:10:27,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313646908] [2021-11-02 22:10:27,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-02 22:10:27,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:10:27,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-02 22:10:27,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-11-02 22:10:27,726 INFO L87 Difference]: Start difference. First operand 629 states and 776 transitions. Second operand has 32 states, 32 states have (on average 3.25) internal successors, (104), 32 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) [2021-11-02 22:10:29,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:10:29,207 INFO L93 Difference]: Finished difference Result 979 states and 1225 transitions. [2021-11-02 22:10:29,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 22:10:29,207 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.25) internal successors, (104), 32 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 56 [2021-11-02 22:10:29,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:10:29,212 INFO L225 Difference]: With dead ends: 979 [2021-11-02 22:10:29,212 INFO L226 Difference]: Without dead ends: 977 [2021-11-02 22:10:29,212 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=241, Invalid=1651, Unknown=0, NotChecked=0, Total=1892 [2021-11-02 22:10:29,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-11-02 22:10:29,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 637. [2021-11-02 22:10:29,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 635 states have (on average 1.2377952755905512) internal successors, (786), 636 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:10:29,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 786 transitions. [2021-11-02 22:10:29,455 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 786 transitions. Word has length 56 [2021-11-02 22:10:29,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:10:29,456 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 786 transitions. [2021-11-02 22:10:29,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.25) internal successors, (104), 32 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) [2021-11-02 22:10:29,456 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 786 transitions. [2021-11-02 22:10:29,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 22:10:29,458 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:10:29,458 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:10:29,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-11-02 22:10:29,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-11-02 22:10:29,671 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:10:29,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:10:29,672 INFO L85 PathProgramCache]: Analyzing trace with hash -427695938, now seen corresponding path program 8 times [2021-11-02 22:10:29,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:10:29,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119242951] [2021-11-02 22:10:29,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:10:29,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:10:29,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:10:30,563 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 47 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-02 22:10:30,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:10:30,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119242951] [2021-11-02 22:10:30,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119242951] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:10:30,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812834821] [2021-11-02 22:10:30,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:10:30,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:10:30,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:10:30,565 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:10:30,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-02 22:10:31,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:10:31,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:10:31,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-02 22:10:31,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:10:32,591 INFO L354 Elim1Store]: treesize reduction 3, result has 78.6 percent of original size [2021-11-02 22:10:32,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 22 [2021-11-02 22:10:32,625 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 61 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:10:32,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812834821] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:10:32,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:10:32,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 43 [2021-11-02 22:10:32,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791759839] [2021-11-02 22:10:32,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-02 22:10:32,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:10:32,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-02 22:10:32,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2021-11-02 22:10:32,627 INFO L87 Difference]: Start difference. First operand 637 states and 786 transitions. Second operand has 43 states, 43 states have (on average 2.302325581395349) internal successors, (99), 43 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) [2021-11-02 22:10:34,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:10:34,969 INFO L93 Difference]: Finished difference Result 1451 states and 1790 transitions. [2021-11-02 22:10:34,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-02 22:10:34,969 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.302325581395349) internal successors, (99), 43 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 56 [2021-11-02 22:10:34,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:10:34,975 INFO L225 Difference]: With dead ends: 1451 [2021-11-02 22:10:34,976 INFO L226 Difference]: Without dead ends: 1278 [2021-11-02 22:10:34,977 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=389, Invalid=3517, Unknown=0, NotChecked=0, Total=3906 [2021-11-02 22:10:34,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2021-11-02 22:10:35,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 667. [2021-11-02 22:10:35,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 665 states have (on average 1.2360902255639097) internal successors, (822), 666 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:10:35,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 822 transitions. [2021-11-02 22:10:35,251 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 822 transitions. Word has length 56 [2021-11-02 22:10:35,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:10:35,251 INFO L470 AbstractCegarLoop]: Abstraction has 667 states and 822 transitions. [2021-11-02 22:10:35,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.302325581395349) internal successors, (99), 43 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) [2021-11-02 22:10:35,251 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 822 transitions. [2021-11-02 22:10:35,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 22:10:35,253 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:10:35,253 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:10:35,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-11-02 22:10:35,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:10:35,457 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:10:35,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:10:35,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1973698610, now seen corresponding path program 9 times [2021-11-02 22:10:35,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:10:35,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434589948] [2021-11-02 22:10:35,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:10:35,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:10:35,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:10:36,512 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 47 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-02 22:10:36,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:10:36,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434589948] [2021-11-02 22:10:36,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434589948] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:10:36,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229968665] [2021-11-02 22:10:36,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:10:36,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:10:36,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:10:36,513 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:10:36,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-02 22:12:29,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-02 22:12:29,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:12:29,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-02 22:12:29,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:12:29,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-02 22:12:29,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:12:29,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-02 22:12:29,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-02 22:12:29,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:12:29,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-02 22:12:31,025 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-02 22:12:31,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 15 [2021-11-02 22:12:31,087 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 61 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:12:31,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229968665] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:12:31,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:12:31,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 45 [2021-11-02 22:12:31,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070692366] [2021-11-02 22:12:31,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-02 22:12:31,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:12:31,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-02 22:12:31,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1830, Unknown=0, NotChecked=0, Total=1980 [2021-11-02 22:12:31,090 INFO L87 Difference]: Start difference. First operand 667 states and 822 transitions. Second operand has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 45 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) [2021-11-02 22:12:34,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:12:34,907 INFO L93 Difference]: Finished difference Result 1428 states and 1769 transitions. [2021-11-02 22:12:34,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-02 22:12:34,908 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 45 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 56 [2021-11-02 22:12:34,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:12:34,913 INFO L225 Difference]: With dead ends: 1428 [2021-11-02 22:12:34,913 INFO L226 Difference]: Without dead ends: 1343 [2021-11-02 22:12:34,915 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=542, Invalid=5464, Unknown=0, NotChecked=0, Total=6006 [2021-11-02 22:12:34,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2021-11-02 22:12:35,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 697. [2021-11-02 22:12:35,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 695 states have (on average 1.2345323741007195) internal successors, (858), 696 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:35,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 858 transitions. [2021-11-02 22:12:35,283 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 858 transitions. Word has length 56 [2021-11-02 22:12:35,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:12:35,284 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 858 transitions. [2021-11-02 22:12:35,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 45 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) [2021-11-02 22:12:35,284 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 858 transitions. [2021-11-02 22:12:35,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 22:12:35,286 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:12:35,286 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:12:35,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-02 22:12:35,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:12:35,502 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:12:35,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:12:35,503 INFO L85 PathProgramCache]: Analyzing trace with hash 289982142, now seen corresponding path program 10 times [2021-11-02 22:12:35,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:12:35,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711715559] [2021-11-02 22:12:35,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:12:35,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:12:35,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:12:36,597 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 47 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-02 22:12:36,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:12:36,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711715559] [2021-11-02 22:12:36,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711715559] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:12:36,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112098457] [2021-11-02 22:12:36,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:12:36,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:12:36,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:12:36,600 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:12:36,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-02 22:12:38,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:12:38,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:12:38,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-02 22:12:38,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:12:39,253 INFO L354 Elim1Store]: treesize reduction 5, result has 68.8 percent of original size [2021-11-02 22:12:39,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 22 [2021-11-02 22:12:39,292 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 61 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:12:39,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112098457] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:12:39,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:12:39,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-11-02 22:12:39,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148752094] [2021-11-02 22:12:39,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-02 22:12:39,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:12:39,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-02 22:12:39,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1580, Unknown=0, NotChecked=0, Total=1722 [2021-11-02 22:12:39,293 INFO L87 Difference]: Start difference. First operand 697 states and 858 transitions. Second operand has 42 states, 42 states have (on average 2.357142857142857) internal successors, (99), 42 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) [2021-11-02 22:12:42,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:12:42,314 INFO L93 Difference]: Finished difference Result 1428 states and 1775 transitions. [2021-11-02 22:12:42,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-02 22:12:42,315 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.357142857142857) internal successors, (99), 42 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 56 [2021-11-02 22:12:42,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:12:42,318 INFO L225 Difference]: With dead ends: 1428 [2021-11-02 22:12:42,318 INFO L226 Difference]: Without dead ends: 1343 [2021-11-02 22:12:42,319 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=326, Invalid=3456, Unknown=0, NotChecked=0, Total=3782 [2021-11-02 22:12:42,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2021-11-02 22:12:42,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 733. [2021-11-02 22:12:42,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 731 states have (on average 1.2352941176470589) internal successors, (903), 732 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:42,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 903 transitions. [2021-11-02 22:12:42,718 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 903 transitions. Word has length 56 [2021-11-02 22:12:42,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:12:42,718 INFO L470 AbstractCegarLoop]: Abstraction has 733 states and 903 transitions. [2021-11-02 22:12:42,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.357142857142857) internal successors, (99), 42 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) [2021-11-02 22:12:42,718 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 903 transitions. [2021-11-02 22:12:42,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-02 22:12:42,721 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:12:42,721 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:12:42,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-11-02 22:12:42,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:12:42,935 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:12:42,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:12:42,936 INFO L85 PathProgramCache]: Analyzing trace with hash 616186110, now seen corresponding path program 3 times [2021-11-02 22:12:42,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:12:42,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333409191] [2021-11-02 22:12:42,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:12:42,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:12:42,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:12:43,354 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-02 22:12:43,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:12:43,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333409191] [2021-11-02 22:12:43,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333409191] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:12:43,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468730498] [2021-11-02 22:12:43,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:12:43,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:12:43,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:12:43,356 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:12:43,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-02 22:12:46,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-02 22:12:46,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:12:46,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-02 22:12:46,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:12:46,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:12:46,862 INFO L354 Elim1Store]: treesize reduction 94, result has 6.9 percent of original size [2021-11-02 22:12:46,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 26 [2021-11-02 22:12:46,907 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:12:46,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468730498] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:12:46,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:12:46,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-11-02 22:12:46,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340187993] [2021-11-02 22:12:46,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-02 22:12:46,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:12:46,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-02 22:12:46,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-11-02 22:12:46,909 INFO L87 Difference]: Start difference. First operand 733 states and 903 transitions. Second operand has 31 states, 31 states have (on average 3.225806451612903) internal successors, (100), 31 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) [2021-11-02 22:12:50,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:12:50,872 INFO L93 Difference]: Finished difference Result 1134 states and 1378 transitions. [2021-11-02 22:12:50,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-02 22:12:50,873 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.225806451612903) internal successors, (100), 31 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 58 [2021-11-02 22:12:50,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:12:50,875 INFO L225 Difference]: With dead ends: 1134 [2021-11-02 22:12:50,875 INFO L226 Difference]: Without dead ends: 1111 [2021-11-02 22:12:50,876 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=902, Invalid=6238, Unknown=0, NotChecked=0, Total=7140 [2021-11-02 22:12:50,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-11-02 22:12:51,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 821. [2021-11-02 22:12:51,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 819 states have (on average 1.216117216117216) internal successors, (996), 820 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:51,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 996 transitions. [2021-11-02 22:12:51,328 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 996 transitions. Word has length 58 [2021-11-02 22:12:51,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:12:51,329 INFO L470 AbstractCegarLoop]: Abstraction has 821 states and 996 transitions. [2021-11-02 22:12:51,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.225806451612903) internal successors, (100), 31 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) [2021-11-02 22:12:51,329 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 996 transitions. [2021-11-02 22:12:51,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-02 22:12:51,330 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:12:51,330 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:12:51,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-02 22:12:51,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:12:51,535 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:12:51,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:12:51,536 INFO L85 PathProgramCache]: Analyzing trace with hash -964013372, now seen corresponding path program 7 times [2021-11-02 22:12:51,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:12:51,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752736358] [2021-11-02 22:12:51,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:12:51,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:12:51,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:12:52,219 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-02 22:12:52,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:12:52,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752736358] [2021-11-02 22:12:52,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752736358] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:12:52,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213436815] [2021-11-02 22:12:52,219 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:12:52,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:12:52,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:12:52,223 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:12:52,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-02 22:12:54,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:12:54,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-02 22:12:54,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:12:54,750 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-02 22:12:54,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213436815] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:12:54,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:12:54,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 24 [2021-11-02 22:12:54,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940539798] [2021-11-02 22:12:54,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 22:12:54,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:12:54,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 22:12:54,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:12:54,754 INFO L87 Difference]: Start difference. First operand 821 states and 996 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:58,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:12:58,685 INFO L93 Difference]: Finished difference Result 1262 states and 1491 transitions. [2021-11-02 22:12:58,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 22:12:58,686 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 0 states have call successors, (0), 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 58 [2021-11-02 22:12:58,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:12:58,688 INFO L225 Difference]: With dead ends: 1262 [2021-11-02 22:12:58,688 INFO L226 Difference]: Without dead ends: 849 [2021-11-02 22:12:58,688 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=422, Invalid=1930, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 22:12:58,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2021-11-02 22:12:59,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 712. [2021-11-02 22:12:59,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 710 states have (on average 1.2056338028169014) internal successors, (856), 711 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:59,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 856 transitions. [2021-11-02 22:12:59,157 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 856 transitions. Word has length 58 [2021-11-02 22:12:59,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:12:59,157 INFO L470 AbstractCegarLoop]: Abstraction has 712 states and 856 transitions. [2021-11-02 22:12:59,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:59,157 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 856 transitions. [2021-11-02 22:12:59,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-02 22:12:59,159 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:12:59,159 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:12:59,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-11-02 22:12:59,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:12:59,360 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:12:59,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:12:59,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1505842959, now seen corresponding path program 11 times [2021-11-02 22:12:59,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:12:59,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570786034] [2021-11-02 22:12:59,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:12:59,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:12:59,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:12:59,801 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 5 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-02 22:12:59,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:12:59,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570786034] [2021-11-02 22:12:59,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570786034] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:12:59,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290885696] [2021-11-02 22:12:59,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:12:59,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:12:59,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:12:59,808 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:12:59,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-02 22:13:21,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-02 22:13:21,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:13:21,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 104 conjunts are in the unsatisfiable core [2021-11-02 22:13:21,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:13:21,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-02 22:13:21,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-02 22:13:21,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:13:21,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-02 22:13:21,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-02 22:13:21,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-02 22:13:21,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:13:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 13 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:13:23,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290885696] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:13:23,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:13:23,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 31] total 44 [2021-11-02 22:13:23,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773229490] [2021-11-02 22:13:23,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-02 22:13:23,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:13:23,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-02 22:13:23,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1759, Unknown=0, NotChecked=0, Total=1892 [2021-11-02 22:13:23,510 INFO L87 Difference]: Start difference. First operand 712 states and 856 transitions. Second operand has 44 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 44 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) [2021-11-02 22:13:33,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:13:33,634 INFO L93 Difference]: Finished difference Result 2239 states and 2671 transitions. [2021-11-02 22:13:33,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-11-02 22:13:33,635 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 44 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 59 [2021-11-02 22:13:33,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:13:33,638 INFO L225 Difference]: With dead ends: 2239 [2021-11-02 22:13:33,639 INFO L226 Difference]: Without dead ends: 1989 [2021-11-02 22:13:33,640 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2896 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=899, Invalid=10443, Unknown=0, NotChecked=0, Total=11342 [2021-11-02 22:13:33,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1989 states. [2021-11-02 22:13:34,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1989 to 682. [2021-11-02 22:13:34,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 680 states have (on average 1.1985294117647058) internal successors, (815), 681 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:13:34,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 815 transitions. [2021-11-02 22:13:34,048 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 815 transitions. Word has length 59 [2021-11-02 22:13:34,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:13:34,049 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 815 transitions. [2021-11-02 22:13:34,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 44 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) [2021-11-02 22:13:34,049 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 815 transitions. [2021-11-02 22:13:34,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-02 22:13:34,051 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:13:34,052 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:13:34,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-02 22:13:34,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:13:34,265 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:13:34,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:13:34,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1253775864, now seen corresponding path program 4 times [2021-11-02 22:13:34,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:13:34,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970443608] [2021-11-02 22:13:34,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:13:34,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:13:34,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:13:34,426 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-02 22:13:34,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:13:34,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970443608] [2021-11-02 22:13:34,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970443608] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:13:34,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120529074] [2021-11-02 22:13:34,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:13:34,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:13:34,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:13:34,429 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:13:34,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-02 22:13:36,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:13:36,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:13:36,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 22:13:36,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:13:36,684 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-02 22:13:36,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120529074] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:13:36,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:13:36,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2021-11-02 22:13:36,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287759461] [2021-11-02 22:13:36,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 22:13:36,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:13:36,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 22:13:36,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:13:36,686 INFO L87 Difference]: Start difference. First operand 682 states and 815 transitions. Second operand has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:13:37,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:13:37,368 INFO L93 Difference]: Finished difference Result 736 states and 877 transitions. [2021-11-02 22:13:37,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 22:13:37,369 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 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 60 [2021-11-02 22:13:37,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:13:37,370 INFO L225 Difference]: With dead ends: 736 [2021-11-02 22:13:37,370 INFO L226 Difference]: Without dead ends: 694 [2021-11-02 22:13:37,370 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:13:37,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-11-02 22:13:37,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 651. [2021-11-02 22:13:37,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 649 states have (on average 1.1987673343605547) internal successors, (778), 650 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:13:37,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 778 transitions. [2021-11-02 22:13:37,740 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 778 transitions. Word has length 60 [2021-11-02 22:13:37,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:13:37,740 INFO L470 AbstractCegarLoop]: Abstraction has 651 states and 778 transitions. [2021-11-02 22:13:37,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:13:37,741 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 778 transitions. [2021-11-02 22:13:37,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-02 22:13:37,742 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:13:37,742 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:13:37,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-02 22:13:37,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-02 22:13:37,967 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:13:37,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:13:37,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1898657402, now seen corresponding path program 8 times [2021-11-02 22:13:37,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:13:37,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546964839] [2021-11-02 22:13:37,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:13:37,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:13:38,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:13:38,868 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 61 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-02 22:13:38,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:13:38,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546964839] [2021-11-02 22:13:38,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546964839] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:13:38,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892126593] [2021-11-02 22:13:38,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:13:38,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:13:38,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:13:38,870 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:13:38,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-02 22:13:40,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:13:40,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:13:40,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-02 22:13:40,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:13:41,776 INFO L354 Elim1Store]: treesize reduction 7, result has 56.3 percent of original size [2021-11-02 22:13:41,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 20 [2021-11-02 22:13:41,812 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 73 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 22:13:41,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892126593] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:13:41,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:13:41,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-11-02 22:13:41,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637471198] [2021-11-02 22:13:41,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-02 22:13:41,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:13:41,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-02 22:13:41,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1279, Unknown=0, NotChecked=0, Total=1406 [2021-11-02 22:13:41,814 INFO L87 Difference]: Start difference. First operand 651 states and 778 transitions. Second operand has 38 states, 38 states have (on average 2.763157894736842) internal successors, (105), 38 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) [2021-11-02 22:13:44,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:13:44,108 INFO L93 Difference]: Finished difference Result 1049 states and 1248 transitions. [2021-11-02 22:13:44,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 22:13:44,109 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.763157894736842) internal successors, (105), 38 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) Word has length 60 [2021-11-02 22:13:44,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:13:44,111 INFO L225 Difference]: With dead ends: 1049 [2021-11-02 22:13:44,111 INFO L226 Difference]: Without dead ends: 985 [2021-11-02 22:13:44,112 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=279, Invalid=2913, Unknown=0, NotChecked=0, Total=3192 [2021-11-02 22:13:44,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-11-02 22:13:44,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 649. [2021-11-02 22:13:44,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 647 states have (on average 1.1993817619783618) internal successors, (776), 648 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:13:44,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 776 transitions. [2021-11-02 22:13:44,488 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 776 transitions. Word has length 60 [2021-11-02 22:13:44,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:13:44,488 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 776 transitions. [2021-11-02 22:13:44,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.763157894736842) internal successors, (105), 38 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) [2021-11-02 22:13:44,515 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 776 transitions. [2021-11-02 22:13:44,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-02 22:13:44,516 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:13:44,516 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:13:44,546 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-11-02 22:13:44,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-02 22:13:44,717 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:13:44,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:13:44,717 INFO L85 PathProgramCache]: Analyzing trace with hash 212750968, now seen corresponding path program 1 times [2021-11-02 22:13:44,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:13:44,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235369436] [2021-11-02 22:13:44,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:13:44,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:13:44,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:13:45,158 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-02 22:13:45,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:13:45,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235369436] [2021-11-02 22:13:45,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235369436] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:13:45,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921017845] [2021-11-02 22:13:45,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:13:45,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:13:45,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:13:45,163 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:13:45,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-02 22:13:47,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:13:47,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 22:13:47,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:13:47,734 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-02 22:13:47,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921017845] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:13:47,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:13:47,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 21 [2021-11-02 22:13:47,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470158842] [2021-11-02 22:13:47,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 22:13:47,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:13:47,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 22:13:47,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-11-02 22:13:47,737 INFO L87 Difference]: Start difference. First operand 649 states and 776 transitions. Second operand has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:13:49,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:13:49,245 INFO L93 Difference]: Finished difference Result 818 states and 959 transitions. [2021-11-02 22:13:49,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 22:13:49,246 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 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 61 [2021-11-02 22:13:49,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:13:49,247 INFO L225 Difference]: With dead ends: 818 [2021-11-02 22:13:49,247 INFO L226 Difference]: Without dead ends: 700 [2021-11-02 22:13:49,248 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2021-11-02 22:13:49,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2021-11-02 22:13:49,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 604. [2021-11-02 22:13:49,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 602 states have (on average 1.2043189368770764) internal successors, (725), 603 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:13:49,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 725 transitions. [2021-11-02 22:13:49,590 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 725 transitions. Word has length 61 [2021-11-02 22:13:49,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:13:49,590 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 725 transitions. [2021-11-02 22:13:49,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:13:49,590 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 725 transitions. [2021-11-02 22:13:49,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-02 22:13:49,591 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:13:49,591 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:13:49,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-11-02 22:13:49,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-02 22:13:49,792 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:13:49,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:13:49,792 INFO L85 PathProgramCache]: Analyzing trace with hash -408668565, now seen corresponding path program 12 times [2021-11-02 22:13:49,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:13:49,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872724342] [2021-11-02 22:13:49,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:13:49,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:13:49,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:13:50,138 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-02 22:13:50,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:13:50,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872724342] [2021-11-02 22:13:50,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872724342] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:13:50,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459870695] [2021-11-02 22:13:50,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:13:50,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:13:50,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:13:50,143 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:13:50,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-02 22:13:56,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-02 22:13:56,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:13:56,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 22:13:56,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:13:57,234 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-02 22:13:57,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459870695] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:13:57,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:13:57,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 21 [2021-11-02 22:13:57,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80912819] [2021-11-02 22:13:57,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 22:13:57,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:13:57,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 22:13:57,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-11-02 22:13:57,236 INFO L87 Difference]: Start difference. First operand 604 states and 725 transitions. Second operand has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:14:01,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:14:01,530 INFO L93 Difference]: Finished difference Result 2286 states and 2705 transitions. [2021-11-02 22:14:01,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-02 22:14:01,531 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 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 61 [2021-11-02 22:14:01,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:14:01,534 INFO L225 Difference]: With dead ends: 2286 [2021-11-02 22:14:01,534 INFO L226 Difference]: Without dead ends: 2150 [2021-11-02 22:14:01,535 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=455, Invalid=2515, Unknown=0, NotChecked=0, Total=2970 [2021-11-02 22:14:01,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-11-02 22:14:01,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 722. [2021-11-02 22:14:01,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 720 states have (on average 1.2194444444444446) internal successors, (878), 721 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:14:01,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 878 transitions. [2021-11-02 22:14:01,944 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 878 transitions. Word has length 61 [2021-11-02 22:14:01,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:14:01,944 INFO L470 AbstractCegarLoop]: Abstraction has 722 states and 878 transitions. [2021-11-02 22:14:01,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:14:01,944 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 878 transitions. [2021-11-02 22:14:01,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-02 22:14:01,945 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:14:01,946 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:14:01,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-11-02 22:14:02,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-11-02 22:14:02,146 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:14:02,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:14:02,147 INFO L85 PathProgramCache]: Analyzing trace with hash -613330085, now seen corresponding path program 2 times [2021-11-02 22:14:02,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:14:02,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910810471] [2021-11-02 22:14:02,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:14:02,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:14:02,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:14:02,274 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-02 22:14:02,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:14:02,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910810471] [2021-11-02 22:14:02,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910810471] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:14:02,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508420455] [2021-11-02 22:14:02,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:14:02,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:14:02,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:14:02,277 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:14:02,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-02 22:14:04,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:14:04,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:14:04,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 22:14:04,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:14:04,385 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-02 22:14:04,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508420455] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:14:04,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:14:04,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-11-02 22:14:04,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189646843] [2021-11-02 22:14:04,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 22:14:04,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:14:04,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 22:14:04,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:14:04,386 INFO L87 Difference]: Start difference. First operand 722 states and 878 transitions. Second operand has 11 states, 11 states have (on average 6.0) internal successors, (66), 11 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:14:04,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:14:04,951 INFO L93 Difference]: Finished difference Result 791 states and 956 transitions. [2021-11-02 22:14:04,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 22:14:04,952 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 11 states have internal predecessors, (66), 0 states have call successors, (0), 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 62 [2021-11-02 22:14:04,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:14:04,953 INFO L225 Difference]: With dead ends: 791 [2021-11-02 22:14:04,953 INFO L226 Difference]: Without dead ends: 761 [2021-11-02 22:14:04,954 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:14:04,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2021-11-02 22:14:05,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 736. [2021-11-02 22:14:05,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 734 states have (on average 1.2179836512261581) internal successors, (894), 735 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:14:05,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 894 transitions. [2021-11-02 22:14:05,398 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 894 transitions. Word has length 62 [2021-11-02 22:14:05,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:14:05,399 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 894 transitions. [2021-11-02 22:14:05,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 11 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:14:05,399 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 894 transitions. [2021-11-02 22:14:05,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-02 22:14:05,401 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:14:05,401 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:14:05,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-02 22:14:05,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:14:05,613 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:14:05,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:14:05,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1701930402, now seen corresponding path program 3 times [2021-11-02 22:14:05,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:14:05,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929032762] [2021-11-02 22:14:05,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:14:05,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:14:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:14:05,825 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-02 22:14:05,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:14:05,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929032762] [2021-11-02 22:14:05,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929032762] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:14:05,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140090431] [2021-11-02 22:14:05,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:14:05,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:14:05,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:14:05,827 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:14:05,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-02 22:14:10,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-02 22:14:10,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:14:10,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 22:14:10,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:14:10,767 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-02 22:14:10,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140090431] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:14:10,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:14:10,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-11-02 22:14:10,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022761749] [2021-11-02 22:14:10,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 22:14:10,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:14:10,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 22:14:10,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=502, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:14:10,769 INFO L87 Difference]: Start difference. First operand 736 states and 894 transitions. Second operand has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 24 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:14:13,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:14:13,573 INFO L93 Difference]: Finished difference Result 1163 states and 1382 transitions. [2021-11-02 22:14:13,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-02 22:14:13,573 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 24 states have internal predecessors, (85), 0 states have call successors, (0), 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 62 [2021-11-02 22:14:13,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:14:13,575 INFO L225 Difference]: With dead ends: 1163 [2021-11-02 22:14:13,575 INFO L226 Difference]: Without dead ends: 1099 [2021-11-02 22:14:13,576 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=348, Invalid=3684, Unknown=0, NotChecked=0, Total=4032 [2021-11-02 22:14:13,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-11-02 22:14:13,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 711. [2021-11-02 22:14:13,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 709 states have (on average 1.2129760225669957) internal successors, (860), 710 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:14:13,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 860 transitions. [2021-11-02 22:14:13,997 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 860 transitions. Word has length 62 [2021-11-02 22:14:13,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:14:13,998 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 860 transitions. [2021-11-02 22:14:13,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 24 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:14:13,998 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 860 transitions. [2021-11-02 22:14:13,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-02 22:14:13,999 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:14:13,999 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:14:14,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-02 22:14:14,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:14:14,203 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:14:14,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:14:14,204 INFO L85 PathProgramCache]: Analyzing trace with hash -44337341, now seen corresponding path program 3 times [2021-11-02 22:14:14,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:14:14,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720399309] [2021-11-02 22:14:14,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:14:14,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:14:14,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:14:14,516 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-02 22:14:14,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:14:14,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720399309] [2021-11-02 22:14:14,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720399309] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:14:14,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278498090] [2021-11-02 22:14:14,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:14:14,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:14:14,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:14:14,519 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:14:14,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-02 22:14:17,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-02 22:14:17,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:14:17,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 22:14:17,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:14:18,005 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-02 22:14:18,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278498090] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:14:18,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:14:18,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-11-02 22:14:18,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557605402] [2021-11-02 22:14:18,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 22:14:18,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:14:18,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 22:14:18,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-11-02 22:14:18,007 INFO L87 Difference]: Start difference. First operand 711 states and 860 transitions. Second operand has 21 states, 21 states have (on average 4.761904761904762) internal successors, (100), 21 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) [2021-11-02 22:14:19,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:14:19,361 INFO L93 Difference]: Finished difference Result 853 states and 1014 transitions. [2021-11-02 22:14:19,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-02 22:14:19,362 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.761904761904762) internal successors, (100), 21 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 63 [2021-11-02 22:14:19,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:14:19,363 INFO L225 Difference]: With dead ends: 853 [2021-11-02 22:14:19,363 INFO L226 Difference]: Without dead ends: 760 [2021-11-02 22:14:19,364 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2021-11-02 22:14:19,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2021-11-02 22:14:19,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 700. [2021-11-02 22:14:19,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 698 states have (on average 1.2134670487106016) internal successors, (847), 699 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:14:19,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 847 transitions. [2021-11-02 22:14:19,786 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 847 transitions. Word has length 63 [2021-11-02 22:14:19,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:14:19,786 INFO L470 AbstractCegarLoop]: Abstraction has 700 states and 847 transitions. [2021-11-02 22:14:19,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.761904761904762) internal successors, (100), 21 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) [2021-11-02 22:14:19,786 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 847 transitions. [2021-11-02 22:14:19,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-02 22:14:19,788 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:14:19,788 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:14:19,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-02 22:14:19,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-11-02 22:14:19,989 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:14:19,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:14:19,989 INFO L85 PathProgramCache]: Analyzing trace with hash -196417505, now seen corresponding path program 5 times [2021-11-02 22:14:19,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:14:19,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274814191] [2021-11-02 22:14:19,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:14:19,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:14:20,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:14:21,016 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-02 22:14:21,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:14:21,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274814191] [2021-11-02 22:14:21,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274814191] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:14:21,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807417972] [2021-11-02 22:14:21,017 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:14:21,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:14:21,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:14:21,018 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:14:21,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-02 22:14:23,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-02 22:14:23,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:14:23,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-02 22:14:23,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:14:24,189 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-02 22:14:24,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807417972] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:14:24,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:14:24,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18] total 39 [2021-11-02 22:14:24,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213089609] [2021-11-02 22:14:24,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-02 22:14:24,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:14:24,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-02 22:14:24,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1359, Unknown=0, NotChecked=0, Total=1482 [2021-11-02 22:14:24,190 INFO L87 Difference]: Start difference. First operand 700 states and 847 transitions. Second operand has 39 states, 39 states have (on average 2.717948717948718) internal successors, (106), 39 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:14:34,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:14:34,791 INFO L93 Difference]: Finished difference Result 2939 states and 3513 transitions. [2021-11-02 22:14:34,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-11-02 22:14:34,791 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.717948717948718) internal successors, (106), 39 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-02 22:14:34,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:14:34,795 INFO L225 Difference]: With dead ends: 2939 [2021-11-02 22:14:34,795 INFO L226 Difference]: Without dead ends: 2759 [2021-11-02 22:14:34,796 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=997, Invalid=9509, Unknown=0, NotChecked=0, Total=10506 [2021-11-02 22:14:34,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2759 states. [2021-11-02 22:14:35,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2759 to 763. [2021-11-02 22:14:35,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 761 states have (on average 1.2076215505913273) internal successors, (919), 762 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:14:35,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 919 transitions. [2021-11-02 22:14:35,304 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 919 transitions. Word has length 63 [2021-11-02 22:14:35,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:14:35,304 INFO L470 AbstractCegarLoop]: Abstraction has 763 states and 919 transitions. [2021-11-02 22:14:35,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.717948717948718) internal successors, (106), 39 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:14:35,304 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 919 transitions. [2021-11-02 22:14:35,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-02 22:14:35,306 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:14:35,306 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:14:35,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-02 22:14:35,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-11-02 22:14:35,506 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:14:35,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:14:35,507 INFO L85 PathProgramCache]: Analyzing trace with hash 631721141, now seen corresponding path program 9 times [2021-11-02 22:14:35,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:14:35,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440826041] [2021-11-02 22:14:35,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:14:35,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:14:35,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:14:37,322 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 22:14:37,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:14:37,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440826041] [2021-11-02 22:14:37,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440826041] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:14:37,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674879234] [2021-11-02 22:14:37,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:14:37,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:14:37,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:14:37,324 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:14:37,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-02 22:14:40,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-02 22:14:40,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:14:40,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-02 22:14:40,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:14:41,290 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 38 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-02 22:14:41,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674879234] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:14:41,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:14:41,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 15] total 42 [2021-11-02 22:14:41,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320168639] [2021-11-02 22:14:41,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-02 22:14:41,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:14:41,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-02 22:14:41,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1612, Unknown=0, NotChecked=0, Total=1722 [2021-11-02 22:14:41,292 INFO L87 Difference]: Start difference. First operand 763 states and 919 transitions. Second operand has 42 states, 42 states have (on average 2.4285714285714284) internal successors, (102), 42 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) [2021-11-02 22:15:14,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:15:14,796 INFO L93 Difference]: Finished difference Result 4499 states and 5312 transitions. [2021-11-02 22:15:14,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2021-11-02 22:15:14,797 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.4285714285714284) internal successors, (102), 42 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 63 [2021-11-02 22:15:14,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:15:14,805 INFO L225 Difference]: With dead ends: 4499 [2021-11-02 22:15:14,805 INFO L226 Difference]: Without dead ends: 3977 [2021-11-02 22:15:14,809 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10924 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=3260, Invalid=30046, Unknown=0, NotChecked=0, Total=33306 [2021-11-02 22:15:14,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3977 states. [2021-11-02 22:15:15,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3977 to 919. [2021-11-02 22:15:15,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 917 states have (on average 1.2071973827699018) internal successors, (1107), 918 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:15:15,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1107 transitions. [2021-11-02 22:15:15,547 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1107 transitions. Word has length 63 [2021-11-02 22:15:15,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:15:15,547 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1107 transitions. [2021-11-02 22:15:15,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.4285714285714284) internal successors, (102), 42 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) [2021-11-02 22:15:15,548 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1107 transitions. [2021-11-02 22:15:15,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-02 22:15:15,550 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:15:15,550 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:15:15,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-02 22:15:15,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:15:15,763 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:15:15,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:15:15,764 INFO L85 PathProgramCache]: Analyzing trace with hash -888488198, now seen corresponding path program 4 times [2021-11-02 22:15:15,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:15:15,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529080225] [2021-11-02 22:15:15,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:15:15,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:15:15,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:15:16,023 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-02 22:15:16,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:15:16,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529080225] [2021-11-02 22:15:16,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529080225] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:15:16,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080936106] [2021-11-02 22:15:16,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:15:16,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:15:16,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:15:16,026 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:15:16,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-02 22:15:18,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:15:18,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:15:18,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-02 22:15:18,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:15:19,282 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 152 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-02 22:15:19,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080936106] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:15:19,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:15:19,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 29] total 41 [2021-11-02 22:15:19,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823491001] [2021-11-02 22:15:19,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-02 22:15:19,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:15:19,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-02 22:15:19,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1512, Unknown=0, NotChecked=0, Total=1640 [2021-11-02 22:15:19,285 INFO L87 Difference]: Start difference. First operand 919 states and 1107 transitions. Second operand has 41 states, 41 states have (on average 2.658536585365854) internal successors, (109), 41 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:15:21,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:15:21,415 INFO L93 Difference]: Finished difference Result 1140 states and 1379 transitions. [2021-11-02 22:15:21,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-02 22:15:21,416 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.658536585365854) internal successors, (109), 41 states have internal predecessors, (109), 0 states have call successors, (0), 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 66 [2021-11-02 22:15:21,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:15:21,418 INFO L225 Difference]: With dead ends: 1140 [2021-11-02 22:15:21,418 INFO L226 Difference]: Without dead ends: 1121 [2021-11-02 22:15:21,419 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=267, Invalid=3273, Unknown=0, NotChecked=0, Total=3540 [2021-11-02 22:15:21,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2021-11-02 22:15:22,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 937. [2021-11-02 22:15:22,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 935 states have (on average 1.209625668449198) internal successors, (1131), 936 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:15:22,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 1131 transitions. [2021-11-02 22:15:22,117 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 1131 transitions. Word has length 66 [2021-11-02 22:15:22,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:15:22,118 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 1131 transitions. [2021-11-02 22:15:22,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.658536585365854) internal successors, (109), 41 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:15:22,118 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 1131 transitions. [2021-11-02 22:15:22,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-02 22:15:22,119 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:15:22,119 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:15:22,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-02 22:15:22,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-11-02 22:15:22,320 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:15:22,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:15:22,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1105653704, now seen corresponding path program 6 times [2021-11-02 22:15:22,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:15:22,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071915799] [2021-11-02 22:15:22,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:15:22,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:15:22,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:15:23,074 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-02 22:15:23,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:15:23,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071915799] [2021-11-02 22:15:23,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071915799] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:15:23,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788729806] [2021-11-02 22:15:23,077 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:15:23,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:15:23,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:15:23,078 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:15:23,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-02 22:15:25,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-02 22:15:25,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:15:25,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-02 22:15:25,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:15:25,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-02 22:15:26,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:15:26,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-02 22:15:26,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-02 22:15:26,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:15:26,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-02 22:15:27,678 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:15:27,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788729806] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:15:27,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:15:27,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 42 [2021-11-02 22:15:27,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004675449] [2021-11-02 22:15:27,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-02 22:15:27,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:15:27,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-02 22:15:27,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1586, Unknown=0, NotChecked=0, Total=1722 [2021-11-02 22:15:27,680 INFO L87 Difference]: Start difference. First operand 937 states and 1131 transitions. Second operand has 42 states, 42 states have (on average 2.9285714285714284) internal successors, (123), 42 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:15:32,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:15:32,144 INFO L93 Difference]: Finished difference Result 1903 states and 2352 transitions. [2021-11-02 22:15:32,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-02 22:15:32,145 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.9285714285714284) internal successors, (123), 42 states have internal predecessors, (123), 0 states have call successors, (0), 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 66 [2021-11-02 22:15:32,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:15:32,151 INFO L225 Difference]: With dead ends: 1903 [2021-11-02 22:15:32,151 INFO L226 Difference]: Without dead ends: 1695 [2021-11-02 22:15:32,152 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=498, Invalid=4904, Unknown=0, NotChecked=0, Total=5402 [2021-11-02 22:15:32,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1695 states. [2021-11-02 22:15:32,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1695 to 942. [2021-11-02 22:15:32,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 940 states have (on average 1.2063829787234042) internal successors, (1134), 941 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:15:32,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 1134 transitions. [2021-11-02 22:15:32,898 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 1134 transitions. Word has length 66 [2021-11-02 22:15:32,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:15:32,899 INFO L470 AbstractCegarLoop]: Abstraction has 942 states and 1134 transitions. [2021-11-02 22:15:32,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.9285714285714284) internal successors, (123), 42 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:15:32,899 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 1134 transitions. [2021-11-02 22:15:32,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-02 22:15:32,901 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:15:32,902 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:15:32,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-11-02 22:15:33,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-11-02 22:15:33,115 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:15:33,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:15:33,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1909645580, now seen corresponding path program 7 times [2021-11-02 22:15:33,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:15:33,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641470600] [2021-11-02 22:15:33,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:15:33,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:15:33,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:15:33,870 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-02 22:15:33,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:15:33,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641470600] [2021-11-02 22:15:33,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641470600] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:15:33,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215989784] [2021-11-02 22:15:33,871 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:15:33,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:15:33,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:15:33,872 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:15:33,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-02 22:15:35,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:15:35,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-02 22:15:35,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:15:36,940 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 22:15:36,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215989784] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:15:36,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:15:36,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-11-02 22:15:36,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497267874] [2021-11-02 22:15:36,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-02 22:15:36,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:15:36,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-02 22:15:36,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1280, Unknown=0, NotChecked=0, Total=1406 [2021-11-02 22:15:36,944 INFO L87 Difference]: Start difference. First operand 942 states and 1134 transitions. Second operand has 38 states, 38 states have (on average 3.210526315789474) internal successors, (122), 38 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:15:40,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:15:40,567 INFO L93 Difference]: Finished difference Result 1778 states and 2182 transitions. [2021-11-02 22:15:40,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-02 22:15:40,568 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.210526315789474) internal successors, (122), 38 states have internal predecessors, (122), 0 states have call successors, (0), 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 66 [2021-11-02 22:15:40,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:15:40,572 INFO L225 Difference]: With dead ends: 1778 [2021-11-02 22:15:40,572 INFO L226 Difference]: Without dead ends: 1776 [2021-11-02 22:15:40,573 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=333, Invalid=3207, Unknown=0, NotChecked=0, Total=3540 [2021-11-02 22:15:40,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1776 states. [2021-11-02 22:15:41,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1776 to 973. [2021-11-02 22:15:41,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 971 states have (on average 1.2028836251287334) internal successors, (1168), 972 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:15:41,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1168 transitions. [2021-11-02 22:15:41,397 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1168 transitions. Word has length 66 [2021-11-02 22:15:41,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:15:41,398 INFO L470 AbstractCegarLoop]: Abstraction has 973 states and 1168 transitions. [2021-11-02 22:15:41,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.210526315789474) internal successors, (122), 38 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:15:41,398 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1168 transitions. [2021-11-02 22:15:41,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-02 22:15:41,399 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:15:41,399 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:15:41,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-11-02 22:15:41,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:15:41,600 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:15:41,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:15:41,600 INFO L85 PathProgramCache]: Analyzing trace with hash 698908178, now seen corresponding path program 13 times [2021-11-02 22:15:41,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:15:41,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424941586] [2021-11-02 22:15:41,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:15:41,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:15:41,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:15:42,800 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 9 proven. 78 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-02 22:15:42,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:15:42,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424941586] [2021-11-02 22:15:42,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424941586] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:15:42,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880247303] [2021-11-02 22:15:42,801 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:15:42,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:15:42,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:15:42,802 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:15:42,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-02 22:15:45,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:15:45,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-02 22:15:45,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:15:46,774 INFO L354 Elim1Store]: treesize reduction 3, result has 78.6 percent of original size [2021-11-02 22:15:46,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 22 [2021-11-02 22:15:46,813 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 9 proven. 101 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:15:46,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880247303] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:15:46,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:15:46,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27] total 50 [2021-11-02 22:15:46,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167677400] [2021-11-02 22:15:46,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-02 22:15:46,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:15:46,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-02 22:15:46,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=2232, Unknown=0, NotChecked=0, Total=2450 [2021-11-02 22:15:46,826 INFO L87 Difference]: Start difference. First operand 973 states and 1168 transitions. Second operand has 50 states, 50 states have (on average 2.34) internal successors, (117), 50 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:15:52,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:15:52,288 INFO L93 Difference]: Finished difference Result 2569 states and 3084 transitions. [2021-11-02 22:15:52,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-02 22:15:52,289 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.34) internal successors, (117), 50 states have internal predecessors, (117), 0 states have call successors, (0), 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 66 [2021-11-02 22:15:52,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:15:52,291 INFO L225 Difference]: With dead ends: 2569 [2021-11-02 22:15:52,291 INFO L226 Difference]: Without dead ends: 2353 [2021-11-02 22:15:52,292 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1766 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=531, Invalid=6111, Unknown=0, NotChecked=0, Total=6642 [2021-11-02 22:15:52,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2353 states. [2021-11-02 22:15:53,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2353 to 993. [2021-11-02 22:15:53,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 991 states have (on average 1.2028254288597375) internal successors, (1192), 992 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:15:53,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1192 transitions. [2021-11-02 22:15:53,042 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1192 transitions. Word has length 66 [2021-11-02 22:15:53,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:15:53,042 INFO L470 AbstractCegarLoop]: Abstraction has 993 states and 1192 transitions. [2021-11-02 22:15:53,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.34) internal successors, (117), 50 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:15:53,042 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1192 transitions. [2021-11-02 22:15:53,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-02 22:15:53,044 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:15:53,044 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:15:53,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-11-02 22:15:53,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-11-02 22:15:53,245 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:15:53,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:15:53,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1572861702, now seen corresponding path program 14 times [2021-11-02 22:15:53,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:15:53,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173392696] [2021-11-02 22:15:53,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:15:53,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:15:53,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:15:54,483 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 9 proven. 78 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-02 22:15:54,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:15:54,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173392696] [2021-11-02 22:15:54,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173392696] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:15:54,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419618278] [2021-11-02 22:15:54,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:15:54,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:15:54,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:15:54,485 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:15:54,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-02 22:15:57,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:15:57,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:15:57,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-02 22:15:57,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:15:58,381 INFO L354 Elim1Store]: treesize reduction 5, result has 68.8 percent of original size [2021-11-02 22:15:58,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 22 [2021-11-02 22:15:58,432 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 9 proven. 101 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:15:58,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419618278] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:15:58,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:15:58,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 49 [2021-11-02 22:15:58,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816994212] [2021-11-02 22:15:58,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-02 22:15:58,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:15:58,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-02 22:15:58,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=2184, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 22:15:58,433 INFO L87 Difference]: Start difference. First operand 993 states and 1192 transitions. Second operand has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 49 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:16:03,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:16:03,682 INFO L93 Difference]: Finished difference Result 2284 states and 2773 transitions. [2021-11-02 22:16:03,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-02 22:16:03,683 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 49 states have internal predecessors, (117), 0 states have call successors, (0), 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 66 [2021-11-02 22:16:03,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:16:03,685 INFO L225 Difference]: With dead ends: 2284 [2021-11-02 22:16:03,685 INFO L226 Difference]: Without dead ends: 2205 [2021-11-02 22:16:03,686 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1680 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=449, Invalid=6031, Unknown=0, NotChecked=0, Total=6480 [2021-11-02 22:16:03,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2205 states. [2021-11-02 22:16:04,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2205 to 1013. [2021-11-02 22:16:04,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1011 states have (on average 1.2027695351137488) internal successors, (1216), 1012 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:16:04,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1216 transitions. [2021-11-02 22:16:04,419 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1216 transitions. Word has length 66 [2021-11-02 22:16:04,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:16:04,419 INFO L470 AbstractCegarLoop]: Abstraction has 1013 states and 1216 transitions. [2021-11-02 22:16:04,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 49 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:16:04,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1216 transitions. [2021-11-02 22:16:04,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-02 22:16:04,421 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:16:04,421 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:16:04,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-11-02 22:16:04,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:16:04,622 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:16:04,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:16:04,622 INFO L85 PathProgramCache]: Analyzing trace with hash 225293586, now seen corresponding path program 15 times [2021-11-02 22:16:04,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:16:04,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74438334] [2021-11-02 22:16:04,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:16:04,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:16:04,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:16:05,839 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 9 proven. 78 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-02 22:16:05,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:16:05,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74438334] [2021-11-02 22:16:05,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74438334] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:16:05,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893986397] [2021-11-02 22:16:05,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:16:05,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:16:05,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:16:05,841 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:16:05,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-02 22:17:06,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-02 22:17:06,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:17:06,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-02 22:17:06,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:17:07,876 INFO L354 Elim1Store]: treesize reduction 5, result has 68.8 percent of original size [2021-11-02 22:17:07,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 22 [2021-11-02 22:17:07,920 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 9 proven. 98 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 22:17:07,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893986397] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:17:07,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:17:07,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2021-11-02 22:17:07,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292567794] [2021-11-02 22:17:07,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-02 22:17:07,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:17:07,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-02 22:17:07,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2090, Unknown=0, NotChecked=0, Total=2256 [2021-11-02 22:17:07,922 INFO L87 Difference]: Start difference. First operand 1013 states and 1216 transitions. Second operand has 48 states, 48 states have (on average 2.3958333333333335) internal successors, (115), 48 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:13,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:17:13,436 INFO L93 Difference]: Finished difference Result 2394 states and 2904 transitions. [2021-11-02 22:17:13,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-02 22:17:13,436 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.3958333333333335) internal successors, (115), 48 states have internal predecessors, (115), 0 states have call successors, (0), 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 66 [2021-11-02 22:17:13,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:17:13,438 INFO L225 Difference]: With dead ends: 2394 [2021-11-02 22:17:13,438 INFO L226 Difference]: Without dead ends: 2315 [2021-11-02 22:17:13,439 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=443, Invalid=5563, Unknown=0, NotChecked=0, Total=6006 [2021-11-02 22:17:13,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2021-11-02 22:17:14,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 1033. [2021-11-02 22:17:14,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1031 states have (on average 1.2027158098933075) internal successors, (1240), 1032 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:14,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 1240 transitions. [2021-11-02 22:17:14,143 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 1240 transitions. Word has length 66 [2021-11-02 22:17:14,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:17:14,144 INFO L470 AbstractCegarLoop]: Abstraction has 1033 states and 1240 transitions. [2021-11-02 22:17:14,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.3958333333333335) internal successors, (115), 48 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:14,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 1240 transitions. [2021-11-02 22:17:14,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-02 22:17:14,145 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:17:14,146 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:17:14,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-11-02 22:17:14,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:17:14,346 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:17:14,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:17:14,347 INFO L85 PathProgramCache]: Analyzing trace with hash -2057604614, now seen corresponding path program 16 times [2021-11-02 22:17:14,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:17:14,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123040108] [2021-11-02 22:17:14,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:17:14,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:17:14,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:17:15,725 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 9 proven. 78 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-02 22:17:15,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:17:15,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123040108] [2021-11-02 22:17:15,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123040108] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:17:15,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644756245] [2021-11-02 22:17:15,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:17:15,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:17:15,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:17:15,727 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:17:15,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-02 22:17:18,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:17:18,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:17:18,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-02 22:17:18,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:17:19,555 INFO L354 Elim1Store]: treesize reduction 5, result has 68.8 percent of original size [2021-11-02 22:17:19,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 22 [2021-11-02 22:17:19,598 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 9 proven. 101 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:17:19,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644756245] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:17:19,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:17:19,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 49 [2021-11-02 22:17:19,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670346511] [2021-11-02 22:17:19,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-02 22:17:19,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:17:19,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-02 22:17:19,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2187, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 22:17:19,600 INFO L87 Difference]: Start difference. First operand 1033 states and 1240 transitions. Second operand has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 49 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:25,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:17:25,656 INFO L93 Difference]: Finished difference Result 2336 states and 2838 transitions. [2021-11-02 22:17:25,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-02 22:17:25,656 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 49 states have internal predecessors, (117), 0 states have call successors, (0), 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 66 [2021-11-02 22:17:25,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:17:25,658 INFO L225 Difference]: With dead ends: 2336 [2021-11-02 22:17:25,659 INFO L226 Difference]: Without dead ends: 2257 [2021-11-02 22:17:25,659 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1702 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=459, Invalid=6183, Unknown=0, NotChecked=0, Total=6642 [2021-11-02 22:17:25,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-11-02 22:17:26,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 1057. [2021-11-02 22:17:26,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1055 states have (on average 1.2037914691943128) internal successors, (1270), 1056 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:26,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 1270 transitions. [2021-11-02 22:17:26,424 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 1270 transitions. Word has length 66 [2021-11-02 22:17:26,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:17:26,424 INFO L470 AbstractCegarLoop]: Abstraction has 1057 states and 1270 transitions. [2021-11-02 22:17:26,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 49 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:26,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 1270 transitions. [2021-11-02 22:17:26,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-02 22:17:26,426 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:17:26,427 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:17:26,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-11-02 22:17:26,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-11-02 22:17:26,629 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:17:26,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:17:26,629 INFO L85 PathProgramCache]: Analyzing trace with hash 182011207, now seen corresponding path program 8 times [2021-11-02 22:17:26,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:17:26,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444634289] [2021-11-02 22:17:26,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:17:26,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:17:26,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:17:27,565 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-02 22:17:27,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:17:27,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444634289] [2021-11-02 22:17:27,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444634289] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:17:27,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998262784] [2021-11-02 22:17:27,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:17:27,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:17:27,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:17:27,567 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:17:27,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-11-02 22:17:30,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:17:30,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:17:30,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-02 22:17:30,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:17:30,902 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 11 proven. 32 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-02 22:17:30,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998262784] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:17:30,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:17:30,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14] total 33 [2021-11-02 22:17:30,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12399192] [2021-11-02 22:17:30,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-02 22:17:30,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:17:30,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-02 22:17:30,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 22:17:30,904 INFO L87 Difference]: Start difference. First operand 1057 states and 1270 transitions. Second operand has 33 states, 33 states have (on average 2.909090909090909) internal successors, (96), 33 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:49,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:17:49,655 INFO L93 Difference]: Finished difference Result 3252 states and 3867 transitions. [2021-11-02 22:17:49,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-11-02 22:17:49,656 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.909090909090909) internal successors, (96), 33 states have internal predecessors, (96), 0 states have call successors, (0), 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 67 [2021-11-02 22:17:49,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:17:49,658 INFO L225 Difference]: With dead ends: 3252 [2021-11-02 22:17:49,658 INFO L226 Difference]: Without dead ends: 3130 [2021-11-02 22:17:49,659 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7037 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=2418, Invalid=19044, Unknown=0, NotChecked=0, Total=21462 [2021-11-02 22:17:49,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3130 states. [2021-11-02 22:17:50,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3130 to 1003. [2021-11-02 22:17:50,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1001 states have (on average 1.1928071928071928) internal successors, (1194), 1002 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:50,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1194 transitions. [2021-11-02 22:17:50,266 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1194 transitions. Word has length 67 [2021-11-02 22:17:50,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:17:50,266 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 1194 transitions. [2021-11-02 22:17:50,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.909090909090909) internal successors, (96), 33 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:50,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1194 transitions. [2021-11-02 22:17:50,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-02 22:17:50,267 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:17:50,268 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:17:50,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-11-02 22:17:50,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-11-02 22:17:50,468 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:17:50,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:17:50,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1570432399, now seen corresponding path program 10 times [2021-11-02 22:17:50,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:17:50,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142291312] [2021-11-02 22:17:50,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:17:50,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:17:50,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:17:50,987 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-02 22:17:50,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:17:50,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142291312] [2021-11-02 22:17:50,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142291312] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:17:50,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814923192] [2021-11-02 22:17:50,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:17:50,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:17:50,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:17:50,988 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:17:50,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-11-02 22:17:53,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:17:53,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:17:53,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-02 22:17:53,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:17:53,939 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-02 22:17:53,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814923192] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:17:53,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:17:53,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-11-02 22:17:53,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795435430] [2021-11-02 22:17:53,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-02 22:17:53,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:17:53,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-02 22:17:53,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 22:17:53,941 INFO L87 Difference]: Start difference. First operand 1003 states and 1194 transitions. Second operand has 36 states, 36 states have (on average 2.8333333333333335) internal successors, (102), 36 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) [2021-11-02 22:18:06,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:18:06,627 INFO L93 Difference]: Finished difference Result 4778 states and 5683 transitions. [2021-11-02 22:18:06,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2021-11-02 22:18:06,628 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.8333333333333335) internal successors, (102), 36 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 67 [2021-11-02 22:18:06,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:18:06,631 INFO L225 Difference]: With dead ends: 4778 [2021-11-02 22:18:06,631 INFO L226 Difference]: Without dead ends: 4773 [2021-11-02 22:18:06,633 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12205 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=2852, Invalid=32304, Unknown=0, NotChecked=0, Total=35156 [2021-11-02 22:18:06,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4773 states. [2021-11-02 22:18:07,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4773 to 1006. [2021-11-02 22:18:07,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1004 states have (on average 1.1922310756972112) internal successors, (1197), 1005 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:18:07,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1197 transitions. [2021-11-02 22:18:07,289 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1197 transitions. Word has length 67 [2021-11-02 22:18:07,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:18:07,289 INFO L470 AbstractCegarLoop]: Abstraction has 1006 states and 1197 transitions. [2021-11-02 22:18:07,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.8333333333333335) internal successors, (102), 36 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) [2021-11-02 22:18:07,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1197 transitions. [2021-11-02 22:18:07,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-02 22:18:07,291 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:18:07,291 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:18:07,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-11-02 22:18:07,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:18:07,491 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:18:07,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:18:07,492 INFO L85 PathProgramCache]: Analyzing trace with hash 299093305, now seen corresponding path program 17 times [2021-11-02 22:18:07,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:18:07,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366170852] [2021-11-02 22:18:07,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:18:07,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:18:07,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:18:07,923 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-02 22:18:07,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:18:07,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366170852] [2021-11-02 22:18:07,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366170852] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:18:07,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300449715] [2021-11-02 22:18:07,924 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:18:07,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:18:07,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:18:07,925 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:18:07,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-11-02 22:18:29,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-02 22:18:29,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:18:29,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 93 conjunts are in the unsatisfiable core [2021-11-02 22:18:29,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:18:30,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-02 22:18:30,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:18:31,426 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 21 proven. 97 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-02 22:18:31,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300449715] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:18:31,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:18:31,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 42 [2021-11-02 22:18:31,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089578735] [2021-11-02 22:18:31,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-02 22:18:31,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:18:31,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-02 22:18:31,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1596, Unknown=0, NotChecked=0, Total=1722 [2021-11-02 22:18:31,428 INFO L87 Difference]: Start difference. First operand 1006 states and 1197 transitions. Second operand has 42 states, 42 states have (on average 2.5238095238095237) internal successors, (106), 42 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:18:49,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:18:49,265 INFO L93 Difference]: Finished difference Result 4313 states and 5107 transitions. [2021-11-02 22:18:49,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-11-02 22:18:49,266 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.5238095238095237) internal successors, (106), 42 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-02 22:18:49,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:18:49,270 INFO L225 Difference]: With dead ends: 4313 [2021-11-02 22:18:49,270 INFO L226 Difference]: Without dead ends: 3952 [2021-11-02 22:18:49,272 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5719 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=1262, Invalid=17644, Unknown=0, NotChecked=0, Total=18906 [2021-11-02 22:18:49,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3952 states. [2021-11-02 22:18:50,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3952 to 913. [2021-11-02 22:18:50,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 911 states have (on average 1.1855104281009878) internal successors, (1080), 912 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:18:50,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1080 transitions. [2021-11-02 22:18:50,048 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1080 transitions. Word has length 69 [2021-11-02 22:18:50,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:18:50,048 INFO L470 AbstractCegarLoop]: Abstraction has 913 states and 1080 transitions. [2021-11-02 22:18:50,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.5238095238095237) internal successors, (106), 42 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:18:50,049 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1080 transitions. [2021-11-02 22:18:50,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-02 22:18:50,050 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:18:50,050 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:18:50,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-11-02 22:18:50,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:18:50,253 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:18:50,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:18:50,253 INFO L85 PathProgramCache]: Analyzing trace with hash -927719173, now seen corresponding path program 4 times [2021-11-02 22:18:50,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:18:50,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950474144] [2021-11-02 22:18:50,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:18:50,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:18:50,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:18:50,630 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-02 22:18:50,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:18:50,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950474144] [2021-11-02 22:18:50,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950474144] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:18:50,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423636944] [2021-11-02 22:18:50,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:18:50,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:18:50,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:18:50,632 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:18:50,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-11-02 22:18:53,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:18:53,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:18:53,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-02 22:18:53,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:18:53,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:18:54,001 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:18:54,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423636944] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:18:54,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:18:54,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21] total 32 [2021-11-02 22:18:54,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145457269] [2021-11-02 22:18:54,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-02 22:18:54,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:18:54,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-02 22:18:54,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=907, Unknown=0, NotChecked=0, Total=992 [2021-11-02 22:18:54,003 INFO L87 Difference]: Start difference. First operand 913 states and 1080 transitions. Second operand has 32 states, 32 states have (on average 3.59375) internal successors, (115), 32 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:18:59,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:18:59,357 INFO L93 Difference]: Finished difference Result 1506 states and 1754 transitions. [2021-11-02 22:18:59,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-11-02 22:18:59,358 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.59375) internal successors, (115), 32 states have internal predecessors, (115), 0 states have call successors, (0), 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 70 [2021-11-02 22:18:59,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:18:59,359 INFO L225 Difference]: With dead ends: 1506 [2021-11-02 22:18:59,359 INFO L226 Difference]: Without dead ends: 1388 [2021-11-02 22:18:59,360 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2477 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=930, Invalid=8576, Unknown=0, NotChecked=0, Total=9506 [2021-11-02 22:18:59,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2021-11-02 22:19:00,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 939. [2021-11-02 22:19:00,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 937 states have (on average 1.1792956243329775) internal successors, (1105), 938 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:00,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 1105 transitions. [2021-11-02 22:19:00,192 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 1105 transitions. Word has length 70 [2021-11-02 22:19:00,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:00,192 INFO L470 AbstractCegarLoop]: Abstraction has 939 states and 1105 transitions. [2021-11-02 22:19:00,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.59375) internal successors, (115), 32 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:00,192 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 1105 transitions. [2021-11-02 22:19:00,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-02 22:19:00,193 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:00,194 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:00,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-11-02 22:19:00,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-11-02 22:19:00,394 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:00,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:00,395 INFO L85 PathProgramCache]: Analyzing trace with hash -2125273192, now seen corresponding path program 4 times [2021-11-02 22:19:00,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:00,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019597256] [2021-11-02 22:19:00,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:00,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:00,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:19:01,275 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-02 22:19:01,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:01,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019597256] [2021-11-02 22:19:01,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019597256] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:19:01,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012244584] [2021-11-02 22:19:01,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:19:01,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:01,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:01,277 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:01,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-11-02 22:19:04,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:19:04,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:19:04,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-02 22:19:04,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:04,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-02 22:19:04,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:19:04,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-02 22:19:04,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-02 22:19:04,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-02 22:19:04,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-02 22:19:05,213 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:19:05,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012244584] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:19:05,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:19:05,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24] total 43 [2021-11-02 22:19:05,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691057564] [2021-11-02 22:19:05,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-02 22:19:05,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:05,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-02 22:19:05,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1667, Unknown=0, NotChecked=0, Total=1806 [2021-11-02 22:19:05,215 INFO L87 Difference]: Start difference. First operand 939 states and 1105 transitions. Second operand has 43 states, 43 states have (on average 3.0697674418604652) internal successors, (132), 43 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:10,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:10,499 INFO L93 Difference]: Finished difference Result 1688 states and 2054 transitions. [2021-11-02 22:19:10,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-02 22:19:10,500 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.0697674418604652) internal successors, (132), 43 states have internal predecessors, (132), 0 states have call successors, (0), 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 70 [2021-11-02 22:19:10,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:10,501 INFO L225 Difference]: With dead ends: 1688 [2021-11-02 22:19:10,501 INFO L226 Difference]: Without dead ends: 1686 [2021-11-02 22:19:10,502 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1400 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=634, Invalid=5846, Unknown=0, NotChecked=0, Total=6480 [2021-11-02 22:19:10,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1686 states. [2021-11-02 22:19:11,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1686 to 971. [2021-11-02 22:19:11,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 969 states have (on average 1.174406604747162) internal successors, (1138), 970 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:11,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1138 transitions. [2021-11-02 22:19:11,298 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1138 transitions. Word has length 70 [2021-11-02 22:19:11,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:11,298 INFO L470 AbstractCegarLoop]: Abstraction has 971 states and 1138 transitions. [2021-11-02 22:19:11,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.0697674418604652) internal successors, (132), 43 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:11,298 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1138 transitions. [2021-11-02 22:19:11,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-02 22:19:11,300 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:11,300 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:11,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-11-02 22:19:11,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:11,500 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:11,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:11,501 INFO L85 PathProgramCache]: Analyzing trace with hash 701007054, now seen corresponding path program 11 times [2021-11-02 22:19:11,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:11,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506798674] [2021-11-02 22:19:11,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:11,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:11,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:19:12,429 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 9 proven. 96 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-02 22:19:12,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:12,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506798674] [2021-11-02 22:19:12,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506798674] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:19:12,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797632174] [2021-11-02 22:19:12,429 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:19:12,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:12,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:12,431 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:12,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-11-02 22:19:29,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-02 22:19:29,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:19:29,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-02 22:19:29,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:30,003 INFO L354 Elim1Store]: treesize reduction 7, result has 56.3 percent of original size [2021-11-02 22:19:30,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 20 [2021-11-02 22:19:30,035 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 9 proven. 117 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 22:19:30,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797632174] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:19:30,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:19:30,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 46 [2021-11-02 22:19:30,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340941204] [2021-11-02 22:19:30,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-02 22:19:30,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:30,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-02 22:19:30,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1914, Unknown=0, NotChecked=0, Total=2070 [2021-11-02 22:19:30,037 INFO L87 Difference]: Start difference. First operand 971 states and 1138 transitions. Second operand has 46 states, 46 states have (on average 2.6739130434782608) internal successors, (123), 46 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:36,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:36,185 INFO L93 Difference]: Finished difference Result 2518 states and 2997 transitions. [2021-11-02 22:19:36,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-02 22:19:36,186 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.6739130434782608) internal successors, (123), 46 states have internal predecessors, (123), 0 states have call successors, (0), 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 70 [2021-11-02 22:19:36,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:36,188 INFO L225 Difference]: With dead ends: 2518 [2021-11-02 22:19:36,188 INFO L226 Difference]: Without dead ends: 2436 [2021-11-02 22:19:36,189 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2050 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=526, Invalid=7484, Unknown=0, NotChecked=0, Total=8010 [2021-11-02 22:19:36,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-11-02 22:19:36,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 1011. [2021-11-02 22:19:36,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 1009 states have (on average 1.1754212091179386) internal successors, (1186), 1010 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:36,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 1186 transitions. [2021-11-02 22:19:36,998 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 1186 transitions. Word has length 70 [2021-11-02 22:19:36,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:36,998 INFO L470 AbstractCegarLoop]: Abstraction has 1011 states and 1186 transitions. [2021-11-02 22:19:36,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.6739130434782608) internal successors, (123), 46 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:36,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 1186 transitions. [2021-11-02 22:19:37,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-02 22:19:37,000 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:37,000 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:37,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-11-02 22:19:37,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:37,201 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:37,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:37,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1257079867, now seen corresponding path program 18 times [2021-11-02 22:19:37,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:37,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023149261] [2021-11-02 22:19:37,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:37,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:19:37,565 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-02 22:19:37,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:37,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023149261] [2021-11-02 22:19:37,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023149261] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:19:37,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443061278] [2021-11-02 22:19:37,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:19:37,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:37,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:37,567 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:37,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b68e5fbf-0e5f-4561-9ecf-6882cb4d0453/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process