./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum_m5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_621f1305-3738-4547-acb8-c47dcd792ba0/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_621f1305-3738-4547-acb8-c47dcd792ba0/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_621f1305-3738-4547-acb8-c47dcd792ba0/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_621f1305-3738-4547-acb8-c47dcd792ba0/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum_m5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_621f1305-3738-4547-acb8-c47dcd792ba0/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_621f1305-3738-4547-acb8-c47dcd792ba0/bin/uautomizer-vX5HgA9Q3a --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 afdb8b285c2183da613babde617c7580c3aee6b3bc694b080468400e828cda16 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-21 16:35:12,660 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:35:12,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:35:12,712 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:35:12,712 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:35:12,714 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:35:12,715 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:35:12,717 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:35:12,719 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:35:12,720 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:35:12,722 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:35:12,723 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:35:12,725 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:35:12,727 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:35:12,728 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:35:12,729 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:35:12,731 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:35:12,732 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:35:12,734 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:35:12,736 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:35:12,738 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:35:12,740 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:35:12,741 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:35:12,743 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:35:12,748 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:35:12,748 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:35:12,749 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:35:12,750 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:35:12,751 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:35:12,752 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:35:12,753 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:35:12,754 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:35:12,756 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:35:12,757 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:35:12,758 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:35:12,759 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:35:12,760 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:35:12,761 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:35:12,761 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:35:12,763 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:35:12,764 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:35:12,769 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_621f1305-3738-4547-acb8-c47dcd792ba0/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 16:35:12,818 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:35:12,819 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:35:12,820 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:35:12,821 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:35:12,822 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:35:12,822 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:35:12,823 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:35:12,823 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:35:12,824 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:35:12,824 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:35:12,825 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:35:12,826 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:35:12,826 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:35:12,826 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:35:12,826 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:35:12,827 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:35:12,827 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:35:12,827 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:35:12,827 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:35:12,828 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:35:12,828 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:35:12,828 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:35:12,828 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:35:12,829 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:35:12,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:35:12,829 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:35:12,830 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:35:12,830 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:35:12,831 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:35:12,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:35:12,831 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:35:12,832 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:35:12,832 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:35:12,832 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_621f1305-3738-4547-acb8-c47dcd792ba0/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_621f1305-3738-4547-acb8-c47dcd792ba0/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> afdb8b285c2183da613babde617c7580c3aee6b3bc694b080468400e828cda16 [2022-11-21 16:35:13,246 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:35:13,294 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:35:13,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:35:13,299 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:35:13,300 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:35:13,301 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_621f1305-3738-4547-acb8-c47dcd792ba0/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/array-crafted/zero_sum_m5.c [2022-11-21 16:35:16,462 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:35:16,676 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:35:16,676 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_621f1305-3738-4547-acb8-c47dcd792ba0/sv-benchmarks/c/array-crafted/zero_sum_m5.c [2022-11-21 16:35:16,683 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_621f1305-3738-4547-acb8-c47dcd792ba0/bin/uautomizer-vX5HgA9Q3a/data/8ffe14a51/afad7b6dd49f419391ff8db43ec2a318/FLAG678956e89 [2022-11-21 16:35:16,704 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_621f1305-3738-4547-acb8-c47dcd792ba0/bin/uautomizer-vX5HgA9Q3a/data/8ffe14a51/afad7b6dd49f419391ff8db43ec2a318 [2022-11-21 16:35:16,711 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:35:16,714 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:35:16,716 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:35:16,717 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:35:16,720 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:35:16,722 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:35:16" (1/1) ... [2022-11-21 16:35:16,724 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@419dd4e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:35:16, skipping insertion in model container [2022-11-21 16:35:16,724 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:35:16" (1/1) ... [2022-11-21 16:35:16,732 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:35:16,753 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:35:16,946 WARN L237 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_621f1305-3738-4547-acb8-c47dcd792ba0/sv-benchmarks/c/array-crafted/zero_sum_m5.c[402,415] [2022-11-21 16:35:16,989 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:35:16,999 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:35:17,014 WARN L237 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_621f1305-3738-4547-acb8-c47dcd792ba0/sv-benchmarks/c/array-crafted/zero_sum_m5.c[402,415] [2022-11-21 16:35:17,044 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:35:17,067 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:35:17,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:35:17 WrapperNode [2022-11-21 16:35:17,068 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:35:17,069 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:35:17,069 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:35:17,069 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:35:17,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:35:17" (1/1) ... [2022-11-21 16:35:17,096 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:35:17" (1/1) ... [2022-11-21 16:35:17,128 INFO L138 Inliner]: procedures = 15, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 149 [2022-11-21 16:35:17,128 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:35:17,129 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:35:17,130 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:35:17,130 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:35:17,140 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:35:17" (1/1) ... [2022-11-21 16:35:17,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:35:17" (1/1) ... [2022-11-21 16:35:17,155 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:35:17" (1/1) ... [2022-11-21 16:35:17,156 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:35:17" (1/1) ... [2022-11-21 16:35:17,161 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:35:17" (1/1) ... [2022-11-21 16:35:17,166 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:35:17" (1/1) ... [2022-11-21 16:35:17,167 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:35:17" (1/1) ... [2022-11-21 16:35:17,179 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:35:17" (1/1) ... [2022-11-21 16:35:17,183 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:35:17,184 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:35:17,184 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:35:17,184 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:35:17,193 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:35:17" (1/1) ... [2022-11-21 16:35:17,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:35:17,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_621f1305-3738-4547-acb8-c47dcd792ba0/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:35:17,227 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_621f1305-3738-4547-acb8-c47dcd792ba0/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:35:17,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_621f1305-3738-4547-acb8-c47dcd792ba0/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:35:17,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:35:17,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:35:17,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 16:35:17,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 16:35:17,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:35:17,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:35:17,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 16:35:17,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 16:35:17,353 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:35:17,356 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:35:17,642 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:35:17,649 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:35:17,649 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-21 16:35:17,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:35:17 BoogieIcfgContainer [2022-11-21 16:35:17,664 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:35:17,666 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:35:17,666 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:35:17,670 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:35:17,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:35:16" (1/3) ... [2022-11-21 16:35:17,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@497c2e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:35:17, skipping insertion in model container [2022-11-21 16:35:17,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:35:17" (2/3) ... [2022-11-21 16:35:17,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@497c2e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:35:17, skipping insertion in model container [2022-11-21 16:35:17,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:35:17" (3/3) ... [2022-11-21 16:35:17,673 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum_m5.c [2022-11-21 16:35:17,697 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:35:17,697 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 16:35:17,786 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:35:17,794 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2120654c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:35:17,795 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-21 16:35:17,800 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 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) [2022-11-21 16:35:17,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-21 16:35:17,808 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:35:17,808 INFO L195 NwaCegarLoop]: 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] [2022-11-21 16:35:17,809 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:35:17,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:35:17,818 INFO L85 PathProgramCache]: Analyzing trace with hash 226651140, now seen corresponding path program 1 times [2022-11-21 16:35:17,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:35:17,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48956801] [2022-11-21 16:35:17,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:35:17,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:35:17,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:35:18,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:18,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:35:18,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48956801] [2022-11-21 16:35:18,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48956801] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:35:18,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:35:18,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:35:18,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960661353] [2022-11-21 16:35:18,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:35:18,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 16:35:18,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:35:18,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 16:35:18,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:35:18,071 INFO L87 Difference]: Start difference. First operand has 44 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 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) Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:18,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:35:18,104 INFO L93 Difference]: Finished difference Result 83 states and 126 transitions. [2022-11-21 16:35:18,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 16:35:18,107 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-21 16:35:18,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:35:18,121 INFO L225 Difference]: With dead ends: 83 [2022-11-21 16:35:18,121 INFO L226 Difference]: Without dead ends: 39 [2022-11-21 16:35:18,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:35:18,129 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:35:18,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:35:18,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-21 16:35:18,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-21 16:35:18,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 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) [2022-11-21 16:35:18,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2022-11-21 16:35:18,174 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 27 [2022-11-21 16:35:18,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:35:18,175 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2022-11-21 16:35:18,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:18,176 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2022-11-21 16:35:18,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-21 16:35:18,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:35:18,179 INFO L195 NwaCegarLoop]: 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] [2022-11-21 16:35:18,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:35:18,180 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:35:18,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:35:18,181 INFO L85 PathProgramCache]: Analyzing trace with hash -833651044, now seen corresponding path program 1 times [2022-11-21 16:35:18,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:35:18,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823782023] [2022-11-21 16:35:18,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:35:18,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:35:18,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:35:18,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:18,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:35:18,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823782023] [2022-11-21 16:35:18,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823782023] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:35:18,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:35:18,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:35:18,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618671008] [2022-11-21 16:35:18,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:35:18,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:35:18,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:35:18,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:35:18,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:35:18,394 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:18,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:35:18,490 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2022-11-21 16:35:18,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:35:18,491 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-21 16:35:18,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:35:18,492 INFO L225 Difference]: With dead ends: 75 [2022-11-21 16:35:18,492 INFO L226 Difference]: Without dead ends: 41 [2022-11-21 16:35:18,493 INFO L412 NwaCegarLoop]: 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 [2022-11-21 16:35:18,494 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:35:18,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 70 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:35:18,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-21 16:35:18,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2022-11-21 16:35:18,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 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) [2022-11-21 16:35:18,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2022-11-21 16:35:18,502 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 27 [2022-11-21 16:35:18,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:35:18,502 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2022-11-21 16:35:18,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:18,503 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2022-11-21 16:35:18,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-21 16:35:18,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:35:18,507 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:35:18,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 16:35:18,508 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:35:18,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:35:18,521 INFO L85 PathProgramCache]: Analyzing trace with hash 479992254, now seen corresponding path program 1 times [2022-11-21 16:35:18,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:35:18,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543682470] [2022-11-21 16:35:18,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:35:18,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:35:18,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:35:18,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:35:18,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:35:18,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543682470] [2022-11-21 16:35:18,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543682470] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:35:18,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:35:18,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:35:18,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520364895] [2022-11-21 16:35:18,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:35:18,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:35:18,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:35:18,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:35:18,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:35:18,683 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:18,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:35:18,844 INFO L93 Difference]: Finished difference Result 91 states and 119 transitions. [2022-11-21 16:35:18,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:35:18,846 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-21 16:35:18,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:35:18,847 INFO L225 Difference]: With dead ends: 91 [2022-11-21 16:35:18,847 INFO L226 Difference]: Without dead ends: 60 [2022-11-21 16:35:18,848 INFO L412 NwaCegarLoop]: 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 [2022-11-21 16:35:18,849 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 73 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:35:18,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 21 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:35:18,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-21 16:35:18,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2022-11-21 16:35:18,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 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) [2022-11-21 16:35:18,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2022-11-21 16:35:18,859 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 29 [2022-11-21 16:35:18,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:35:18,860 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2022-11-21 16:35:18,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:18,860 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-11-21 16:35:18,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-21 16:35:18,862 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:35:18,862 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:35:18,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 16:35:18,862 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:35:18,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:35:18,863 INFO L85 PathProgramCache]: Analyzing trace with hash -509099182, now seen corresponding path program 1 times [2022-11-21 16:35:18,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:35:18,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962152956] [2022-11-21 16:35:18,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:35:18,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:35:18,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:35:19,053 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-21 16:35:19,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:35:19,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962152956] [2022-11-21 16:35:19,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962152956] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:35:19,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193762066] [2022-11-21 16:35:19,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:35:19,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:35:19,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_621f1305-3738-4547-acb8-c47dcd792ba0/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:35:19,059 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_621f1305-3738-4547-acb8-c47dcd792ba0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:35:19,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_621f1305-3738-4547-acb8-c47dcd792ba0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:35:19,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:35:19,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 16:35:19,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:35:19,277 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-21 16:35:19,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:35:19,336 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-21 16:35:19,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193762066] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:35:19,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:35:19,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-21 16:35:19,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558343311] [2022-11-21 16:35:19,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:35:19,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 16:35:19,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:35:19,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 16:35:19,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:35:19,342 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 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) [2022-11-21 16:35:19,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:35:19,445 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2022-11-21 16:35:19,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:35:19,446 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 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 49 [2022-11-21 16:35:19,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:35:19,447 INFO L225 Difference]: With dead ends: 97 [2022-11-21 16:35:19,447 INFO L226 Difference]: Without dead ends: 53 [2022-11-21 16:35:19,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:35:19,449 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 2 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:35:19,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 116 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:35:19,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-21 16:35:19,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-11-21 16:35:19,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:19,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2022-11-21 16:35:19,458 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 49 [2022-11-21 16:35:19,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:35:19,458 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2022-11-21 16:35:19,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 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) [2022-11-21 16:35:19,459 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2022-11-21 16:35:19,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-21 16:35:19,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:35:19,460 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:35:19,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_621f1305-3738-4547-acb8-c47dcd792ba0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-21 16:35:19,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_621f1305-3738-4547-acb8-c47dcd792ba0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:35:19,666 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:35:19,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:35:19,666 INFO L85 PathProgramCache]: Analyzing trace with hash 290748660, now seen corresponding path program 2 times [2022-11-21 16:35:19,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:35:19,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310247158] [2022-11-21 16:35:19,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:35:19,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:35:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:35:19,766 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-21 16:35:19,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:35:19,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310247158] [2022-11-21 16:35:19,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310247158] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:35:19,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994273830] [2022-11-21 16:35:19,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:35:19,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:35:19,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_621f1305-3738-4547-acb8-c47dcd792ba0/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:35:19,768 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_621f1305-3738-4547-acb8-c47dcd792ba0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:35:19,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_621f1305-3738-4547-acb8-c47dcd792ba0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:35:19,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:35:19,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:35:19,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 16:35:19,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:35:19,995 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-21 16:35:19,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:35:20,078 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-21 16:35:20,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994273830] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:35:20,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:35:20,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-21 16:35:20,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545749062] [2022-11-21 16:35:20,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:35:20,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 16:35:20,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:35:20,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 16:35:20,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:35:20,081 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2022-11-21 16:35:20,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:35:20,278 INFO L93 Difference]: Finished difference Result 122 states and 150 transitions. [2022-11-21 16:35:20,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:35:20,279 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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 51 [2022-11-21 16:35:20,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:35:20,279 INFO L225 Difference]: With dead ends: 122 [2022-11-21 16:35:20,280 INFO L226 Difference]: Without dead ends: 82 [2022-11-21 16:35:20,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:35:20,281 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 48 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:35:20,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 33 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:35:20,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-21 16:35:20,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2022-11-21 16:35:20,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 71 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:20,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2022-11-21 16:35:20,289 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 51 [2022-11-21 16:35:20,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:35:20,290 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2022-11-21 16:35:20,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2022-11-21 16:35:20,290 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2022-11-21 16:35:20,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-21 16:35:20,291 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:35:20,291 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:35:20,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_621f1305-3738-4547-acb8-c47dcd792ba0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 16:35:20,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_621f1305-3738-4547-acb8-c47dcd792ba0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:35:20,497 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:35:20,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:35:20,497 INFO L85 PathProgramCache]: Analyzing trace with hash -813057144, now seen corresponding path program 3 times [2022-11-21 16:35:20,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:35:20,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364679236] [2022-11-21 16:35:20,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:35:20,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:35:20,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:35:31,049 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:31,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:35:31,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364679236] [2022-11-21 16:35:31,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364679236] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:35:31,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147600413] [2022-11-21 16:35:31,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:35:31,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:35:31,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_621f1305-3738-4547-acb8-c47dcd792ba0/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:35:31,056 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_621f1305-3738-4547-acb8-c47dcd792ba0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:35:31,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_621f1305-3738-4547-acb8-c47dcd792ba0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:35:31,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-21 16:35:31,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:35:31,214 WARN L261 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 103 conjunts are in the unsatisfiable core [2022-11-21 16:35:31,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:35:44,899 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:44,899 INFO L328 TraceCheckSpWp]: Computing backward predicates...