./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c39f3d25be406fa166da46a61b4a36c0a90262202dfdee83ae8e5211f182a6f7 --- 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-4e7fbc6 [2022-11-23 14:09:29,064 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:09:29,066 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:09:29,083 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:09:29,084 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:09:29,085 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:09:29,086 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:09:29,088 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:09:29,089 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:09:29,090 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:09:29,091 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:09:29,092 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:09:29,093 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:09:29,094 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:09:29,095 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:09:29,096 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:09:29,097 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:09:29,098 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:09:29,099 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:09:29,101 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:09:29,102 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:09:29,104 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:09:29,105 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:09:29,105 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:09:29,109 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:09:29,109 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:09:29,109 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:09:29,110 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:09:29,111 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:09:29,112 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:09:29,112 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:09:29,113 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:09:29,114 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:09:29,115 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:09:29,116 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:09:29,116 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:09:29,117 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:09:29,117 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:09:29,117 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:09:29,118 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:09:29,119 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:09:29,120 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:09:29,143 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:09:29,143 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:09:29,143 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:09:29,143 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:09:29,144 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:09:29,144 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:09:29,145 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:09:29,145 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:09:29,145 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:09:29,145 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:09:29,145 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:09:29,145 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:09:29,146 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:09:29,146 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:09:29,146 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:09:29,146 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:09:29,146 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:09:29,147 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:09:29,147 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:09:29,147 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:09:29,148 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:09:29,148 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:09:29,148 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:09:29,148 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:09:29,148 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:09:29,149 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:09:29,149 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:09:29,149 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:09:29,149 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:09:29,149 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:09:29,149 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:09:29,150 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:09:29,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:09:29,150 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:09:29,150 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:09:29,150 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:09:29,151 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:09:29,151 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:09:29,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:09:29,151 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:09:29,151 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:09:29,151 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_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c39f3d25be406fa166da46a61b4a36c0a90262202dfdee83ae8e5211f182a6f7 [2022-11-23 14:09:29,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:09:29,443 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:09:29,471 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:09:29,473 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:09:29,473 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:09:29,475 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound100.c [2022-11-23 14:09:32,621 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:09:32,798 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:09:32,798 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound100.c [2022-11-23 14:09:32,805 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/data/4781be395/c588b4bd067e43e68c1dd3d3e6b966f7/FLAG6ab2638e8 [2022-11-23 14:09:32,821 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/data/4781be395/c588b4bd067e43e68c1dd3d3e6b966f7 [2022-11-23 14:09:32,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:09:32,825 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:09:32,826 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:09:32,826 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:09:32,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:09:32,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:09:32" (1/1) ... [2022-11-23 14:09:32,832 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@98740c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:32, skipping insertion in model container [2022-11-23 14:09:32,832 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:09:32" (1/1) ... [2022-11-23 14:09:32,841 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:09:32,855 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:09:33,001 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_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound100.c[526,539] [2022-11-23 14:09:33,017 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:09:33,027 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:09:33,041 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_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound100.c[526,539] [2022-11-23 14:09:33,047 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:09:33,060 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:09:33,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:33 WrapperNode [2022-11-23 14:09:33,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:09:33,062 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:09:33,063 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:09:33,063 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:09:33,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:33" (1/1) ... [2022-11-23 14:09:33,077 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:33" (1/1) ... [2022-11-23 14:09:33,095 INFO L138 Inliner]: procedures = 14, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2022-11-23 14:09:33,096 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:09:33,096 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:09:33,097 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:09:33,097 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:09:33,107 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:33" (1/1) ... [2022-11-23 14:09:33,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:33" (1/1) ... [2022-11-23 14:09:33,108 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:33" (1/1) ... [2022-11-23 14:09:33,109 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:33" (1/1) ... [2022-11-23 14:09:33,112 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:33" (1/1) ... [2022-11-23 14:09:33,116 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:33" (1/1) ... [2022-11-23 14:09:33,117 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:33" (1/1) ... [2022-11-23 14:09:33,118 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:33" (1/1) ... [2022-11-23 14:09:33,120 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:09:33,125 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:09:33,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:09:33,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:09:33,127 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:33" (1/1) ... [2022-11-23 14:09:33,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:09:33,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:09:33,164 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:09:33,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:09:33,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:09:33,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:09:33,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:09:33,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:09:33,214 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-23 14:09:33,214 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-23 14:09:33,285 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:09:33,287 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:09:33,427 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:09:33,477 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:09:33,477 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 14:09:33,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:09:33 BoogieIcfgContainer [2022-11-23 14:09:33,479 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:09:33,482 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:09:33,482 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:09:33,486 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:09:33,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:09:32" (1/3) ... [2022-11-23 14:09:33,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dc8a219 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:09:33, skipping insertion in model container [2022-11-23 14:09:33,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:33" (2/3) ... [2022-11-23 14:09:33,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dc8a219 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:09:33, skipping insertion in model container [2022-11-23 14:09:33,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:09:33" (3/3) ... [2022-11-23 14:09:33,498 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_valuebound100.c [2022-11-23 14:09:33,529 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:09:33,529 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:09:33,605 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:09:33,616 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@75afc136, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:09:33,616 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:09:33,623 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-23 14:09:33,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 14:09:33,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:33,634 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 14:09:33,635 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:09:33,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:33,659 INFO L85 PathProgramCache]: Analyzing trace with hash -697525204, now seen corresponding path program 1 times [2022-11-23 14:09:33,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:33,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804212725] [2022-11-23 14:09:33,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:33,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:33,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:34,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:34,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:34,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804212725] [2022-11-23 14:09:34,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804212725] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:09:34,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:09:34,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:09:34,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477214126] [2022-11-23 14:09:34,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:09:34,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:09:34,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:34,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:09:34,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:09:34,174 INFO L87 Difference]: Start difference. First operand has 20 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:09:34,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:34,338 INFO L93 Difference]: Finished difference Result 51 states and 87 transitions. [2022-11-23 14:09:34,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:09:34,341 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-23 14:09:34,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:34,349 INFO L225 Difference]: With dead ends: 51 [2022-11-23 14:09:34,349 INFO L226 Difference]: Without dead ends: 28 [2022-11-23 14:09:34,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:09:34,365 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 11 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:34,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 77 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:09:34,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-23 14:09:34,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2022-11-23 14:09:34,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 14:09:34,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2022-11-23 14:09:34,409 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 6 [2022-11-23 14:09:34,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:34,409 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2022-11-23 14:09:34,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:09:34,410 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2022-11-23 14:09:34,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 14:09:34,411 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:34,411 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:09:34,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:09:34,412 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:09:34,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:34,413 INFO L85 PathProgramCache]: Analyzing trace with hash -515229903, now seen corresponding path program 1 times [2022-11-23 14:09:34,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:34,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753601190] [2022-11-23 14:09:34,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:34,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:34,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:34,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:34,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:34,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753601190] [2022-11-23 14:09:34,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753601190] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:09:34,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:09:34,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:09:34,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667396677] [2022-11-23 14:09:34,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:09:34,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:09:34,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:34,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:09:34,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:09:34,541 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 14:09:34,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:34,603 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2022-11-23 14:09:34,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:09:34,604 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-11-23 14:09:34,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:34,605 INFO L225 Difference]: With dead ends: 34 [2022-11-23 14:09:34,606 INFO L226 Difference]: Without dead ends: 32 [2022-11-23 14:09:34,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:09:34,609 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:34,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 70 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:09:34,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-23 14:09:34,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2022-11-23 14:09:34,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 14:09:34,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-11-23 14:09:34,619 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 11 [2022-11-23 14:09:34,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:34,620 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-11-23 14:09:34,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 14:09:34,620 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-11-23 14:09:34,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-23 14:09:34,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:34,621 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:09:34,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:09:34,622 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:09:34,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:34,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1604661492, now seen corresponding path program 1 times [2022-11-23 14:09:34,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:34,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629329542] [2022-11-23 14:09:34,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:34,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:34,638 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:09:34,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [164953757] [2022-11-23 14:09:34,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:34,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:09:34,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:09:34,643 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:09:34,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:09:34,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:34,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 14:09:34,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:09:34,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:09:34,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:09:35,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:09:35,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:35,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629329542] [2022-11-23 14:09:35,188 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:09:35,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164953757] [2022-11-23 14:09:35,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164953757] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:09:35,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1792209366] [2022-11-23 14:09:35,237 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-23 14:09:35,237 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:09:35,252 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:09:35,259 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:09:35,260 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:09:35,833 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 66 for LOIs [2022-11-23 14:09:35,862 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:09:36,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1792209366] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:09:36,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:09:36,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 7] total 15 [2022-11-23 14:09:36,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529947431] [2022-11-23 14:09:36,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:09:36,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:09:36,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:36,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:09:36,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-11-23 14:09:36,478 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 14:09:36,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:36,688 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2022-11-23 14:09:36,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:09:36,689 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2022-11-23 14:09:36,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:36,690 INFO L225 Difference]: With dead ends: 61 [2022-11-23 14:09:36,690 INFO L226 Difference]: Without dead ends: 43 [2022-11-23 14:09:36,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-11-23 14:09:36,692 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 6 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:36,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 51 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:09:36,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-23 14:09:36,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-23 14:09:36,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-23 14:09:36,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-11-23 14:09:36,709 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 16 [2022-11-23 14:09:36,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:36,710 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-11-23 14:09:36,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 14:09:36,710 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-11-23 14:09:36,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-23 14:09:36,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:36,711 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-23 14:09:36,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:09:36,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:09:36,918 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:09:36,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:36,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1042343919, now seen corresponding path program 1 times [2022-11-23 14:09:36,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:36,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614001279] [2022-11-23 14:09:36,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:36,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:36,934 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:09:36,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [378808826] [2022-11-23 14:09:36,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:36,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:09:36,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:09:36,936 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:09:36,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:09:37,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:37,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 14:09:37,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:09:37,177 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-23 14:09:37,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:09:37,351 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-23 14:09:37,355 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:37,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614001279] [2022-11-23 14:09:37,356 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:09:37,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378808826] [2022-11-23 14:09:37,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378808826] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:09:37,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1384258144] [2022-11-23 14:09:37,359 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-23 14:09:37,359 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:09:37,361 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:09:37,361 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:09:37,361 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:09:40,111 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-11-23 14:09:40,121 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:09:40,947 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '702#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:09:40,947 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:09:40,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:09:40,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2022-11-23 14:09:40,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342417404] [2022-11-23 14:09:40,948 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 14:09:40,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 14:09:40,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:40,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 14:09:40,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-11-23 14:09:40,949 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-23 14:09:41,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:41,228 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions. [2022-11-23 14:09:41,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 14:09:41,229 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) Word has length 33 [2022-11-23 14:09:41,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:41,231 INFO L225 Difference]: With dead ends: 77 [2022-11-23 14:09:41,232 INFO L226 Difference]: Without dead ends: 64 [2022-11-23 14:09:41,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-11-23 14:09:41,233 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 36 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:41,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 52 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:09:41,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-23 14:09:41,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-11-23 14:09:41,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 39 states have internal predecessors, (40), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-23 14:09:41,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2022-11-23 14:09:41,251 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 33 [2022-11-23 14:09:41,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:41,252 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2022-11-23 14:09:41,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-23 14:09:41,252 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2022-11-23 14:09:41,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-23 14:09:41,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:41,253 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:09:41,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:09:41,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:09:41,459 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:09:41,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:41,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1798480357, now seen corresponding path program 1 times [2022-11-23 14:09:41,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:41,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753230207] [2022-11-23 14:09:41,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:41,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:41,471 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:09:41,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1462194457] [2022-11-23 14:09:41,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:41,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:09:41,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:09:41,473 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:09:41,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:09:41,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:41,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 14:09:41,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:09:41,666 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-23 14:09:41,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:09:41,788 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-23 14:09:41,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:41,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753230207] [2022-11-23 14:09:41,788 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:09:41,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462194457] [2022-11-23 14:09:41,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462194457] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:09:41,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [909027252] [2022-11-23 14:09:41,794 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-23 14:09:41,794 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:09:41,795 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:09:41,795 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:09:41,795 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:09:44,248 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-23 14:09:44,266 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:09:45,140 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1175#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:09:45,140 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:09:45,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:09:45,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-11-23 14:09:45,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686861029] [2022-11-23 14:09:45,141 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 14:09:45,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 14:09:45,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:45,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 14:09:45,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-11-23 14:09:45,143 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-23 14:09:45,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:45,320 INFO L93 Difference]: Finished difference Result 73 states and 88 transitions. [2022-11-23 14:09:45,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:09:45,321 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 40 [2022-11-23 14:09:45,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:45,322 INFO L225 Difference]: With dead ends: 73 [2022-11-23 14:09:45,322 INFO L226 Difference]: Without dead ends: 71 [2022-11-23 14:09:45,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-11-23 14:09:45,324 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:45,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 46 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:09:45,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-23 14:09:45,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-11-23 14:09:45,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 40 states have (on average 1.125) internal successors, (45), 43 states have internal predecessors, (45), 21 states have call successors, (21), 8 states have call predecessors, (21), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-23 14:09:45,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2022-11-23 14:09:45,341 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 40 [2022-11-23 14:09:45,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:45,341 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2022-11-23 14:09:45,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-23 14:09:45,342 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2022-11-23 14:09:45,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-23 14:09:45,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:45,344 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:09:45,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:09:45,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:09:45,550 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:09:45,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:45,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1731990838, now seen corresponding path program 1 times [2022-11-23 14:09:45,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:45,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825645956] [2022-11-23 14:09:45,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:45,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:45,560 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:09:45,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2097567873] [2022-11-23 14:09:45,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:45,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:09:45,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:09:45,563 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:09:45,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:09:45,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:45,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-23 14:09:45,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:09:45,913 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-23 14:09:45,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:09:48,044 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-23 14:09:48,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:48,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825645956] [2022-11-23 14:09:48,045 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:09:48,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097567873] [2022-11-23 14:09:48,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097567873] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:09:48,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1302343889] [2022-11-23 14:09:48,048 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-23 14:09:48,048 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:09:48,049 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:09:48,049 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:09:48,049 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:09:51,125 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-11-23 14:09:51,137 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:09:52,238 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1725#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:09:52,239 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:09:52,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:09:52,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-11-23 14:09:52,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700313268] [2022-11-23 14:09:52,239 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 14:09:52,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 14:09:52,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:52,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 14:09:52,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-11-23 14:09:52,241 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-23 14:09:54,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:54,052 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2022-11-23 14:09:54,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 14:09:54,052 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 52 [2022-11-23 14:09:54,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:54,054 INFO L225 Difference]: With dead ends: 96 [2022-11-23 14:09:54,054 INFO L226 Difference]: Without dead ends: 94 [2022-11-23 14:09:54,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 128 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2022-11-23 14:09:54,062 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 45 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:54,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 63 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 14:09:54,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-23 14:09:54,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2022-11-23 14:09:54,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 60 states have internal predecessors, (61), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-23 14:09:54,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2022-11-23 14:09:54,094 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 52 [2022-11-23 14:09:54,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:54,095 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2022-11-23 14:09:54,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-23 14:09:54,095 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2022-11-23 14:09:54,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-23 14:09:54,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:54,097 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:09:54,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:09:54,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:09:54,303 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:09:54,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:54,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1143375622, now seen corresponding path program 1 times [2022-11-23 14:09:54,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:54,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009641697] [2022-11-23 14:09:54,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:54,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:54,314 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:09:54,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1812553744] [2022-11-23 14:09:54,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:54,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:09:54,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:09:54,316 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:09:54,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:09:54,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:54,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-23 14:09:54,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:09:54,694 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-23 14:09:54,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:09:55,270 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-23 14:09:55,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:55,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009641697] [2022-11-23 14:09:55,271 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:09:55,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812553744] [2022-11-23 14:09:55,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812553744] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:09:55,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1875689413] [2022-11-23 14:09:55,273 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-23 14:09:55,273 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:09:55,273 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:09:55,274 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:09:55,274 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:09:58,465 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-11-23 14:09:58,474 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:09:59,609 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2410#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:09:59,610 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:09:59,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:09:59,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-11-23 14:09:59,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443958173] [2022-11-23 14:09:59,610 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 14:09:59,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 14:09:59,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:59,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 14:09:59,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-11-23 14:09:59,612 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 9 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) [2022-11-23 14:10:02,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 14:10:04,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 14:10:04,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:10:04,305 INFO L93 Difference]: Finished difference Result 114 states and 133 transitions. [2022-11-23 14:10:04,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 14:10:04,306 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 9 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) Word has length 63 [2022-11-23 14:10:04,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:10:04,307 INFO L225 Difference]: With dead ends: 114 [2022-11-23 14:10:04,307 INFO L226 Difference]: Without dead ends: 99 [2022-11-23 14:10:04,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 157 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=189, Invalid=867, Unknown=0, NotChecked=0, Total=1056 [2022-11-23 14:10:04,309 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 33 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:10:04,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 72 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 457 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2022-11-23 14:10:04,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-23 14:10:04,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 85. [2022-11-23 14:10:04,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 55 states have internal predecessors, (58), 18 states have call successors, (18), 13 states have call predecessors, (18), 13 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-23 14:10:04,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 93 transitions. [2022-11-23 14:10:04,337 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 93 transitions. Word has length 63 [2022-11-23 14:10:04,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:10:04,338 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 93 transitions. [2022-11-23 14:10:04,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 9 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) [2022-11-23 14:10:04,338 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 93 transitions. [2022-11-23 14:10:04,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-23 14:10:04,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:10:04,339 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:10:04,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 14:10:04,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:10:04,545 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:10:04,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:10:04,546 INFO L85 PathProgramCache]: Analyzing trace with hash 2113244439, now seen corresponding path program 1 times [2022-11-23 14:10:04,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:10:04,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846902175] [2022-11-23 14:10:04,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:04,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:10:04,562 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:10:04,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1264137326] [2022-11-23 14:10:04,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:04,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:10:04,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:10:04,575 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:10:04,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:10:04,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:04,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:10:04,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-11-23 14:10:04,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:10:04,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:10:04,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846902175] [2022-11-23 14:10:04,705 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:10:04,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264137326] [2022-11-23 14:10:04,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264137326] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:10:04,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:10:04,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:10:04,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577227276] [2022-11-23 14:10:04,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:10:04,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:10:04,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:10:04,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:10:04,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:10:04,707 INFO L87 Difference]: Start difference. First operand 85 states and 93 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-23 14:10:04,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:10:04,783 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2022-11-23 14:10:04,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:10:04,784 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), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 73 [2022-11-23 14:10:04,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:10:04,789 INFO L225 Difference]: With dead ends: 92 [2022-11-23 14:10:04,789 INFO L226 Difference]: Without dead ends: 80 [2022-11-23 14:10:04,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:10:04,792 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:10:04,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 86 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:10:04,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-23 14:10:04,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-11-23 14:10:04,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 50 states have (on average 1.06) internal successors, (53), 51 states have internal predecessors, (53), 17 states have call successors, (17), 12 states have call predecessors, (17), 12 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-23 14:10:04,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2022-11-23 14:10:04,834 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 73 [2022-11-23 14:10:04,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:10:04,834 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2022-11-23 14:10:04,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-23 14:10:04,835 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2022-11-23 14:10:04,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-23 14:10:04,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:10:04,840 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-23 14:10:04,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 14:10:05,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-23 14:10:05,046 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:10:05,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:10:05,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1241228560, now seen corresponding path program 2 times [2022-11-23 14:10:05,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:10:05,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901142188] [2022-11-23 14:10:05,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:05,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:10:05,053 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:10:05,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [334233737] [2022-11-23 14:10:05,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:10:05,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:10:05,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:10:05,054 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:10:05,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 14:10:05,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 14:10:05,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:10:05,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-23 14:10:05,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:05,385 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 41 proven. 34 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-23 14:10:05,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:10:06,664 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 41 proven. 29 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2022-11-23 14:10:06,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:10:06,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901142188] [2022-11-23 14:10:06,665 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:10:06,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334233737] [2022-11-23 14:10:06,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334233737] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:10:06,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1617652057] [2022-11-23 14:10:06,667 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-23 14:10:06,668 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:10:06,668 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:10:06,668 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:10:06,668 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:10:09,588 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-11-23 14:10:09,598 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:10:10,670 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3643#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:10:10,670 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:10:10,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:10:10,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2022-11-23 14:10:10,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439355412] [2022-11-23 14:10:10,670 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 14:10:10,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 14:10:10,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:10:10,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 14:10:10,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2022-11-23 14:10:10,672 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) [2022-11-23 14:10:18,194 WARN L233 SmtUtils]: Spent 7.23s on a formula simplification. DAG size of input: 38 DAG size of output: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:10:19,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:10:19,152 INFO L93 Difference]: Finished difference Result 112 states and 130 transitions. [2022-11-23 14:10:19,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 14:10:19,153 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) Word has length 74 [2022-11-23 14:10:19,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:10:19,155 INFO L225 Difference]: With dead ends: 112 [2022-11-23 14:10:19,155 INFO L226 Difference]: Without dead ends: 110 [2022-11-23 14:10:19,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 189 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2022-11-23 14:10:19,156 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 41 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:10:19,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 88 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-23 14:10:19,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-23 14:10:19,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2022-11-23 14:10:19,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 67 states have internal predecessors, (70), 28 states have call successors, (28), 14 states have call predecessors, (28), 14 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-23 14:10:19,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 125 transitions. [2022-11-23 14:10:19,200 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 125 transitions. Word has length 74 [2022-11-23 14:10:19,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:10:19,200 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 125 transitions. [2022-11-23 14:10:19,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) [2022-11-23 14:10:19,201 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 125 transitions. [2022-11-23 14:10:19,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-23 14:10:19,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:10:19,203 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-11-23 14:10:19,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 14:10:19,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:10:19,409 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:10:19,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:10:19,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1175687132, now seen corresponding path program 3 times [2022-11-23 14:10:19,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:10:19,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30074520] [2022-11-23 14:10:19,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:19,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:10:19,418 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:10:19,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [713340427] [2022-11-23 14:10:19,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:10:19,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:10:19,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:10:19,420 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:10:19,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 14:10:19,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:10:19,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:10:19,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-23 14:10:19,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:01,000 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 97 proven. 67 refuted. 5 times theorem prover too weak. 192 trivial. 0 not checked. [2022-11-23 14:11:01,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:11:36,229 WARN L859 $PredicateComparison]: unable to prove that (or (not (= (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~B~0#1|) |c_ULTIMATE.start_main_~d~0#1|)) (let ((.cse12 (* |c_ULTIMATE.start_main_~B~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse16 (div |c_ULTIMATE.start_main_~d~0#1| 2))) (let ((.cse17 (<= (+ .cse16 1) |c_ULTIMATE.start_main_~r~0#1|)) (.cse15 (< |c_ULTIMATE.start_main_~d~0#1| 0)) (.cse2 (= (mod |c_ULTIMATE.start_main_~d~0#1| 2) 0)) (.cse19 (<= .cse16 |c_ULTIMATE.start_main_~r~0#1|)) (.cse18 (= |c_ULTIMATE.start_main_~A~0#1| (+ .cse12 |c_ULTIMATE.start_main_~r~0#1|)))) (let ((.cse1 (< |c_ULTIMATE.start_main_~p~0#1| 0)) (.cse8 (or .cse19 .cse18)) (.cse9 (not .cse19)) (.cse10 (+ .cse16 |c_ULTIMATE.start_main_~A~0#1|)) (.cse11 (and .cse15 (not .cse2))) (.cse3 (or .cse17 .cse18)) (.cse4 (not .cse17)) (.cse5 (+ .cse16 |c_ULTIMATE.start_main_~A~0#1| 1)) (.cse7 (not .cse15)) (.cse13 (* (div |c_ULTIMATE.start_main_~p~0#1| 2) |c_ULTIMATE.start_main_~B~0#1|)) (.cse0 (= (mod |c_ULTIMATE.start_main_~p~0#1| 2) 0))) (and (or (and (not .cse0) .cse1) (let ((.cse6 (+ .cse12 |c_ULTIMATE.start_main_~r~0#1| .cse13))) (and (or .cse2 (and .cse3 (or .cse4 (= .cse5 .cse6))) .cse7) (or (and .cse8 (or .cse9 (= .cse10 .cse6))) .cse11)))) (or (not .cse1) (let ((.cse14 (+ .cse12 |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~B~0#1| .cse13))) (and (or (and .cse8 (or .cse9 (= .cse10 .cse14))) .cse11) (or (and .cse3 (or .cse4 (= .cse5 .cse14))) .cse2 .cse7))) .cse0)))))) is different from true [2022-11-23 14:12:16,927 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse17 (div |c_ULTIMATE.start_main_~p~0#1| 2)) (.cse7 (* |c_ULTIMATE.start_main_~B~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse0 (= (mod |c_ULTIMATE.start_main_~d~0#1| 2) 0)) (.cse35 (< |c_ULTIMATE.start_main_~d~0#1| 0)) (.cse4 (div |c_ULTIMATE.start_main_~d~0#1| 2))) (let ((.cse1 (+ .cse4 1)) (.cse3 (not .cse35)) (.cse5 (and .cse35 (not .cse0))) (.cse18 (= (mod |c_ULTIMATE.start_main_~p~0#1| 2) 0)) (.cse6 (< |c_ULTIMATE.start_main_~p~0#1| 0)) (.cse9 (not (= |c_ULTIMATE.start_main_~A~0#1| (+ .cse7 |c_ULTIMATE.start_main_~r~0#1|)))) (.cse13 (* .cse17 |c_ULTIMATE.start_main_~B~0#1|))) (and (let ((.cse2 (+ |c_ULTIMATE.start_main_~B~0#1| .cse13))) (or (and (or .cse0 (not (= .cse1 .cse2)) .cse3) (or (not (= .cse4 .cse2)) .cse5)) (not .cse6) (let ((.cse16 (+ .cse17 1))) (let ((.cse15 (+ |c_ULTIMATE.start_main_~B~0#1| (* (div .cse16 2) |c_ULTIMATE.start_main_~B~0#1|))) (.cse8 (div .cse2 2))) (let ((.cse10 (= .cse15 .cse8)) (.cse11 (<= .cse2 |c_ULTIMATE.start_main_~r~0#1|)) (.cse12 (= (mod .cse16 2) 0))) (and (or (not (<= (+ .cse7 .cse8) |c_ULTIMATE.start_main_~A~0#1|)) .cse9 .cse10 .cse11 .cse12) (or (let ((.cse14 (< .cse2 0))) (and (or (not (<= (+ .cse7 .cse8 |c_ULTIMATE.start_main_~B~0#1| .cse13) |c_ULTIMATE.start_main_~A~0#1|)) .cse10 (and .cse14 (not (= (mod .cse2 2) 0)))) (or (not .cse14) (= .cse15 (+ .cse8 1))))) (not .cse11) .cse9 .cse12))))) .cse18)) (or (and (or (not (= .cse13 .cse1)) .cse0 .cse3) (or (not (= .cse4 .cse13)) .cse5)) (and (not .cse18) .cse6) (let ((.cse31 (* (div |c_ULTIMATE.start_main_~p~0#1| 4) |c_ULTIMATE.start_main_~B~0#1|))) (let ((.cse24 (< .cse17 0)) (.cse33 (+ .cse31 |c_ULTIMATE.start_main_~B~0#1|)) (.cse25 (div .cse13 2))) (let ((.cse26 (<= .cse13 |c_ULTIMATE.start_main_~r~0#1|)) (.cse23 (= .cse25 .cse31)) (.cse20 (= (mod .cse17 2) 0)) (.cse19 (= .cse25 .cse33)) (.cse22 (not .cse24))) (and (or (let ((.cse21 (not (<= (+ .cse25 .cse7) |c_ULTIMATE.start_main_~A~0#1|)))) (and (or .cse19 .cse20 .cse21 .cse22) (or .cse23 .cse21 .cse24))) .cse26 .cse9) (or (not .cse26) .cse9 (let ((.cse29 (= (mod .cse13 2) 0)) (.cse34 (< .cse13 0))) (let ((.cse32 (+ .cse25 1)) (.cse30 (not .cse34)) (.cse27 (and .cse34 (not .cse29))) (.cse28 (not (<= (+ .cse25 .cse7 .cse13) |c_ULTIMATE.start_main_~A~0#1|)))) (and (or (and (or .cse27 .cse23 .cse28) (or .cse29 .cse30 (= .cse31 .cse32))) .cse24) (or .cse20 (and (or (= .cse32 .cse33) .cse30) (or .cse19 .cse27 .cse28)) .cse22))))))))))))) is different from false [2022-11-23 14:13:36,802 WARN L233 SmtUtils]: Spent 8.54s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:14:05,578 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 105 proven. 28 refuted. 0 times theorem prover too weak. 222 trivial. 6 not checked. [2022-11-23 14:14:05,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:14:05,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30074520] [2022-11-23 14:14:05,579 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:14:05,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713340427] [2022-11-23 14:14:05,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713340427] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:14:05,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [984543887] [2022-11-23 14:14:05,581 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-23 14:14:05,581 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:14:05,582 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:14:05,582 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:14:05,582 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:14:08,224 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-11-23 14:14:08,233 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:14:12,195 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4492#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:14:12,196 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:14:12,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:14:12,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2022-11-23 14:14:12,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603888392] [2022-11-23 14:14:12,196 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 14:14:12,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 14:14:12,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:14:12,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 14:14:12,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=862, Unknown=7, NotChecked=126, Total=1190 [2022-11-23 14:14:12,198 INFO L87 Difference]: Start difference. First operand 108 states and 125 transitions. Second operand has 25 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 17 states have internal predecessors, (35), 16 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 13 states have call predecessors, (24), 14 states have call successors, (24) [2022-11-23 14:15:30,061 WARN L233 SmtUtils]: Spent 1.22m on a formula simplification. DAG size of input: 134 DAG size of output: 96 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:15:31,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 14:15:35,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 14:16:10,587 WARN L233 SmtUtils]: Spent 27.99s on a formula simplification. DAG size of input: 123 DAG size of output: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:16:12,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 14:16:26,210 WARN L233 SmtUtils]: Spent 5.86s on a formula simplification. DAG size of input: 87 DAG size of output: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:16:42,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 14:16:51,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 14:16:54,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 14:16:56,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 14:16:58,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 14:17:00,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 14:17:20,427 WARN L233 SmtUtils]: Spent 7.72s on a formula simplification. DAG size of input: 136 DAG size of output: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:17:22,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 14:17:24,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 14:17:26,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 14:17:34,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 14:17:37,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 14:17:41,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-23 14:17:52,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-23 14:17:55,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-23 14:18:16,521 WARN L233 SmtUtils]: Spent 14.23s on a formula simplification. DAG size of input: 141 DAG size of output: 106 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:18:18,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-23 14:18:21,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-23 14:18:37,902 WARN L233 SmtUtils]: Spent 12.72s on a formula simplification. DAG size of input: 82 DAG size of output: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:19:00,290 WARN L233 SmtUtils]: Spent 11.09s on a formula simplification. DAG size of input: 82 DAG size of output: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:19:01,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:19:01,530 INFO L93 Difference]: Finished difference Result 124 states and 143 transitions. [2022-11-23 14:19:01,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-23 14:19:01,531 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 17 states have internal predecessors, (35), 16 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 13 states have call predecessors, (24), 14 states have call successors, (24) Word has length 81 [2022-11-23 14:19:01,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:19:01,533 INFO L225 Difference]: With dead ends: 124 [2022-11-23 14:19:01,533 INFO L226 Difference]: Without dead ends: 122 [2022-11-23 14:19:01,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 204 SyntacticMatches, 11 SemanticMatches, 45 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 299.8s TimeCoverageRelationStatistics Valid=348, Invalid=1621, Unknown=19, NotChecked=174, Total=2162 [2022-11-23 14:19:01,535 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 38 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 77 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 55.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:19:01,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 117 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 489 Invalid, 11 Unknown, 106 Unchecked, 55.6s Time] [2022-11-23 14:19:01,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-23 14:19:01,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 118. [2022-11-23 14:19:01,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 75 states have internal predecessors, (77), 29 states have call successors, (29), 16 states have call predecessors, (29), 16 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2022-11-23 14:19:01,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 134 transitions. [2022-11-23 14:19:01,601 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 134 transitions. Word has length 81 [2022-11-23 14:19:01,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:19:01,601 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 134 transitions. [2022-11-23 14:19:01,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 17 states have internal predecessors, (35), 16 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 13 states have call predecessors, (24), 14 states have call successors, (24) [2022-11-23 14:19:01,602 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 134 transitions. [2022-11-23 14:19:01,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-23 14:19:01,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:19:01,604 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-23 14:19:01,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 14:19:01,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 14:19:01,811 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:19:01,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:19:01,811 INFO L85 PathProgramCache]: Analyzing trace with hash 20862120, now seen corresponding path program 2 times [2022-11-23 14:19:01,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:19:01,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832337293] [2022-11-23 14:19:01,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:19:01,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:19:01,816 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:19:01,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [496560856] [2022-11-23 14:19:01,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:19:01,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:19:01,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:19:01,827 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:19:01,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 14:19:01,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-23 14:19:01,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:19:01,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-23 14:19:01,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:19:02,116 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 117 proven. 42 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-11-23 14:19:02,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:19:02,340 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2022-11-23 14:19:02,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:19:02,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832337293] [2022-11-23 14:19:02,341 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:19:02,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496560856] [2022-11-23 14:19:02,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496560856] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:19:02,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1549308199] [2022-11-23 14:19:02,343 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-23 14:19:02,344 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:19:02,344 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:19:02,344 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:19:02,344 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:19:05,024 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-11-23 14:19:05,033 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:19:06,213 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5456#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:19:06,213 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:19:06,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:19:06,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 18 [2022-11-23 14:19:06,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595616641] [2022-11-23 14:19:06,214 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 14:19:06,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 14:19:06,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:19:06,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 14:19:06,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2022-11-23 14:19:06,215 INFO L87 Difference]: Start difference. First operand 118 states and 134 transitions. Second operand has 18 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2022-11-23 14:19:06,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:19:06,691 INFO L93 Difference]: Finished difference Result 118 states and 134 transitions. [2022-11-23 14:19:06,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:19:06,692 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 92 [2022-11-23 14:19:06,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:19:06,692 INFO L225 Difference]: With dead ends: 118 [2022-11-23 14:19:06,692 INFO L226 Difference]: Without dead ends: 0 [2022-11-23 14:19:06,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 241 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2022-11-23 14:19:06,697 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 41 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:19:06,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 25 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:19:06,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-23 14:19:06,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-23 14:19:06,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:19:06,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-23 14:19:06,698 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 92 [2022-11-23 14:19:06,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:19:06,698 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-23 14:19:06,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2022-11-23 14:19:06,699 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-23 14:19:06,699 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-23 14:19:06,701 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-23 14:19:06,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 14:19:06,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-23 14:19:06,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-23 14:19:16,563 WARN L233 SmtUtils]: Spent 6.08s on a formula simplification. DAG size of input: 203 DAG size of output: 8 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-23 14:19:19,868 INFO L895 garLoopResultBuilder]: At program point L52-2(lines 22 61) the Hoare annotation is: (and (<= 1 |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~A~0#1| (+ |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|)) (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1)) [2022-11-23 14:19:19,869 INFO L895 garLoopResultBuilder]: At program point L44-1(lines 44 56) the Hoare annotation is: (and (= |ULTIMATE.start_main_~d~0#1| 1) (= |ULTIMATE.start_main_~A~0#1| (+ (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|)) (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1)) [2022-11-23 14:19:19,869 INFO L895 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (let ((.cse1 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse2 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse3 (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|)) (.cse6 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (let ((.cse0 (div (- |ULTIMATE.start_main_~p~0#1|) (- 2)))) (and (<= 4 |ULTIMATE.start_main_~p~0#1|) (<= (* 2 (* |ULTIMATE.start_main_~B~0#1| (div (- .cse0) (- 2)))) |ULTIMATE.start_main_~r~0#1|) .cse1 .cse2 .cse3 (= |ULTIMATE.start_main_~d~0#1| (* 2 (* .cse0 |ULTIMATE.start_main_~B~0#1|))) (= 0 (mod .cse0 2)))) (let ((.cse5 (select |#memory_int| 1)) (.cse4 (select |#memory_int| 2))) (and (= (select .cse4 7) 0) (= (select |#length| 3) 12) (= 114 (select .cse4 2)) (= (ite (and (<= |ULTIMATE.start_main_~A~0#1| 100) (<= 0 |ULTIMATE.start_main_~A~0#1|)) 1 0) |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= (select .cse4 6) 99) (= 97 (select .cse4 1)) (= 2 (select |#length| 1)) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) (= (select |#valid| 3) 1) (= (select .cse4 4) 50) (= 100 (select .cse4 3)) .cse1 (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select |#valid| 1) 1) .cse2 (= (select |#valid| 0) 0) (not (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (select .cse4 5) 46) (= (select |#valid| 2) 1) .cse3 (= |#NULL.offset| 0) (= 8 (select |#length| 2)) (= (select .cse5 0) 48) .cse6 (= (select .cse5 1) 0) (= (select .cse4 0) 104) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) (and .cse1 .cse2 (<= 1 |ULTIMATE.start_main_~r~0#1|) .cse3 .cse6 (= 2 |ULTIMATE.start_main_~d~0#1|)))) [2022-11-23 14:19:19,869 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-23 14:19:19,869 INFO L895 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (and (<= 1 |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~A~0#1| (+ |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|)) (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1)) [2022-11-23 14:19:19,870 INFO L895 garLoopResultBuilder]: At program point L45-1(line 45) the Hoare annotation is: (and (= |ULTIMATE.start_main_~A~0#1| (+ (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|)) (<= 1 |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1)) [2022-11-23 14:19:19,870 INFO L899 garLoopResultBuilder]: For program point L37(lines 34 42) no Hoare annotation was computed. [2022-11-23 14:19:19,870 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-23 14:19:19,870 INFO L895 garLoopResultBuilder]: At program point L58(line 58) the Hoare annotation is: (and (= |ULTIMATE.start_main_~p~0#1| 1) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1)) [2022-11-23 14:19:19,870 INFO L899 garLoopResultBuilder]: For program point L46(lines 44 56) no Hoare annotation was computed. [2022-11-23 14:19:19,870 INFO L895 garLoopResultBuilder]: At program point L34-2(lines 34 42) the Hoare annotation is: (let ((.cse4 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse0 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse1 (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|)) (.cse2 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and .cse0 (<= 1 |ULTIMATE.start_main_~r~0#1|) .cse1 (= (+ (* |ULTIMATE.start_main_~B~0#1| (div |ULTIMATE.start_main_~p~0#1| 2)) (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) (+ (div |ULTIMATE.start_main_~d~0#1| 2) |ULTIMATE.start_main_~A~0#1|)) .cse2 (= 2 |ULTIMATE.start_main_~d~0#1|)) (let ((.cse3 (div (- |ULTIMATE.start_main_~p~0#1|) (- 2)))) (and (<= 4 |ULTIMATE.start_main_~p~0#1|) (<= (* 2 (* |ULTIMATE.start_main_~B~0#1| (div (- .cse3) (- 2)))) |ULTIMATE.start_main_~r~0#1|) .cse4 .cse0 .cse1 (= |ULTIMATE.start_main_~d~0#1| (* 2 (* .cse3 |ULTIMATE.start_main_~B~0#1|))) (= 0 (mod .cse3 2)))) (let ((.cse6 (select |#memory_int| 1)) (.cse5 (select |#memory_int| 2))) (and (= (select .cse5 7) 0) (= (select |#length| 3) 12) (= 114 (select .cse5 2)) (= (ite (and (<= |ULTIMATE.start_main_~A~0#1| 100) (<= 0 |ULTIMATE.start_main_~A~0#1|)) 1 0) |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= (select .cse5 6) 99) (= 97 (select .cse5 1)) (= 2 (select |#length| 1)) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) (= (select |#valid| 3) 1) (= (select .cse5 4) 50) (= 100 (select .cse5 3)) .cse4 (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select |#valid| 1) 1) .cse0 (= (select |#valid| 0) 0) (not (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (select .cse5 5) 46) (= (select |#valid| 2) 1) .cse1 (= |#NULL.offset| 0) (= 8 (select |#length| 2)) (= (select .cse6 0) 48) .cse2 (= (select .cse6 1) 0) (= (select .cse5 0) 104) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))))) [2022-11-23 14:19:19,871 INFO L902 garLoopResultBuilder]: At program point L59(line 59) the Hoare annotation is: true [2022-11-23 14:19:19,871 INFO L895 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse4 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse0 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse1 (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|)) (.cse2 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and .cse0 (<= 1 |ULTIMATE.start_main_~r~0#1|) .cse1 (= (+ (* |ULTIMATE.start_main_~B~0#1| (div |ULTIMATE.start_main_~p~0#1| 2)) (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) (+ (div |ULTIMATE.start_main_~d~0#1| 2) |ULTIMATE.start_main_~A~0#1|)) .cse2 (= 2 |ULTIMATE.start_main_~d~0#1|)) (let ((.cse3 (div (- |ULTIMATE.start_main_~p~0#1|) (- 2)))) (and (<= 4 |ULTIMATE.start_main_~p~0#1|) (<= (* 2 (* |ULTIMATE.start_main_~B~0#1| (div (- .cse3) (- 2)))) |ULTIMATE.start_main_~r~0#1|) .cse4 .cse0 .cse1 (= |ULTIMATE.start_main_~d~0#1| (* 2 (* .cse3 |ULTIMATE.start_main_~B~0#1|))) (= 0 (mod .cse3 2)))) (let ((.cse6 (select |#memory_int| 1)) (.cse5 (select |#memory_int| 2))) (and (= (select .cse5 7) 0) (= (select |#length| 3) 12) (= 114 (select .cse5 2)) (= (ite (and (<= |ULTIMATE.start_main_~A~0#1| 100) (<= 0 |ULTIMATE.start_main_~A~0#1|)) 1 0) |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= (select .cse5 6) 99) (= 97 (select .cse5 1)) (= 2 (select |#length| 1)) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) (= (select |#valid| 3) 1) (= (select .cse5 4) 50) (= 100 (select .cse5 3)) .cse4 (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select |#valid| 1) 1) .cse0 (= (select |#valid| 0) 0) (not (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (select .cse5 5) 46) (= (select |#valid| 2) 1) .cse1 (= |#NULL.offset| 0) (= 8 (select |#length| 2)) (= (select .cse6 0) 48) .cse2 (= (select .cse6 1) 0) (= (select .cse5 0) 104) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))))) [2022-11-23 14:19:19,871 INFO L895 garLoopResultBuilder]: At program point L35-1(line 35) the Hoare annotation is: (let ((.cse1 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse2 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse3 (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|)) (.cse6 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (let ((.cse0 (div (- |ULTIMATE.start_main_~p~0#1|) (- 2)))) (and (<= 4 |ULTIMATE.start_main_~p~0#1|) (<= (* 2 (* |ULTIMATE.start_main_~B~0#1| (div (- .cse0) (- 2)))) |ULTIMATE.start_main_~r~0#1|) .cse1 .cse2 .cse3 (= |ULTIMATE.start_main_~d~0#1| (* 2 (* .cse0 |ULTIMATE.start_main_~B~0#1|))) (= 0 (mod .cse0 2)))) (let ((.cse5 (select |#memory_int| 1)) (.cse4 (select |#memory_int| 2))) (and (= (select .cse4 7) 0) (= (select |#length| 3) 12) (= 114 (select .cse4 2)) (= (ite (and (<= |ULTIMATE.start_main_~A~0#1| 100) (<= 0 |ULTIMATE.start_main_~A~0#1|)) 1 0) |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= (select .cse4 6) 99) (= 97 (select .cse4 1)) (= 2 (select |#length| 1)) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) (= (select |#valid| 3) 1) (= (select .cse4 4) 50) (= 100 (select .cse4 3)) .cse1 (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= (select |#valid| 1) 1) .cse2 (= (select |#valid| 0) 0) (not (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (select .cse4 5) 46) (= (select |#valid| 2) 1) .cse3 (= |#NULL.offset| 0) (= 8 (select |#length| 2)) (= (select .cse5 0) 48) .cse6 (= (select .cse5 1) 0) (= (select .cse4 0) 104) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) (and .cse1 .cse2 (<= 1 |ULTIMATE.start_main_~r~0#1|) .cse3 .cse6 (= 2 |ULTIMATE.start_main_~d~0#1|)))) [2022-11-23 14:19:19,871 INFO L899 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2022-11-23 14:19:19,872 INFO L899 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2022-11-23 14:19:19,872 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-11-23 14:19:19,872 INFO L899 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2022-11-23 14:19:19,872 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2022-11-23 14:19:19,872 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2022-11-23 14:19:19,875 INFO L444 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1] [2022-11-23 14:19:19,878 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-23 14:19:19,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:19:19 BoogieIcfgContainer [2022-11-23 14:19:19,898 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-23 14:19:19,898 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-23 14:19:19,898 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-23 14:19:19,899 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-23 14:19:19,899 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:09:33" (3/4) ... [2022-11-23 14:19:19,902 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-23 14:19:19,908 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-11-23 14:19:19,912 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2022-11-23 14:19:19,912 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2022-11-23 14:19:19,913 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-11-23 14:19:19,913 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-23 14:19:19,913 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-23 14:19:19,948 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/witness.graphml [2022-11-23 14:19:19,948 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-23 14:19:19,949 INFO L158 Benchmark]: Toolchain (without parser) took 587124.08ms. Allocated memory was 144.7MB in the beginning and 446.7MB in the end (delta: 302.0MB). Free memory was 108.6MB in the beginning and 301.9MB in the end (delta: -193.3MB). Peak memory consumption was 110.5MB. Max. memory is 16.1GB. [2022-11-23 14:19:19,949 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 98.6MB. Free memory was 72.1MB in the beginning and 72.1MB in the end (delta: 25.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 14:19:19,949 INFO L158 Benchmark]: CACSL2BoogieTranslator took 235.53ms. Allocated memory is still 144.7MB. Free memory was 108.6MB in the beginning and 98.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-23 14:19:19,950 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.50ms. Allocated memory is still 144.7MB. Free memory was 98.1MB in the beginning and 96.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 14:19:19,950 INFO L158 Benchmark]: Boogie Preprocessor took 25.53ms. Allocated memory is still 144.7MB. Free memory was 96.4MB in the beginning and 95.1MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 14:19:19,950 INFO L158 Benchmark]: RCFGBuilder took 354.35ms. Allocated memory is still 144.7MB. Free memory was 95.1MB in the beginning and 81.7MB in the end (delta: 13.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-23 14:19:19,951 INFO L158 Benchmark]: TraceAbstraction took 586415.67ms. Allocated memory was 144.7MB in the beginning and 446.7MB in the end (delta: 302.0MB). Free memory was 81.3MB in the beginning and 305.1MB in the end (delta: -223.7MB). Peak memory consumption was 236.7MB. Max. memory is 16.1GB. [2022-11-23 14:19:19,951 INFO L158 Benchmark]: Witness Printer took 49.87ms. Allocated memory is still 446.7MB. Free memory was 305.1MB in the beginning and 301.9MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-23 14:19:19,953 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 98.6MB. Free memory was 72.1MB in the beginning and 72.1MB in the end (delta: 25.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 235.53ms. Allocated memory is still 144.7MB. Free memory was 108.6MB in the beginning and 98.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.50ms. Allocated memory is still 144.7MB. Free memory was 98.1MB in the beginning and 96.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.53ms. Allocated memory is still 144.7MB. Free memory was 96.4MB in the beginning and 95.1MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 354.35ms. Allocated memory is still 144.7MB. Free memory was 95.1MB in the beginning and 81.7MB in the end (delta: 13.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 586415.67ms. Allocated memory was 144.7MB in the beginning and 446.7MB in the end (delta: 302.0MB). Free memory was 81.3MB in the beginning and 305.1MB in the end (delta: -223.7MB). Peak memory consumption was 236.7MB. Max. memory is 16.1GB. * Witness Printer took 49.87ms. Allocated memory is still 446.7MB. Free memory was 305.1MB in the beginning and 301.9MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 586.3s, OverallIterations: 11, TraceHistogramMax: 16, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 305.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 13.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 12 mSolverCounterUnknown, 334 SdHoareTripleChecker+Valid, 62.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 283 mSDsluCounter, 747 SdHoareTripleChecker+Invalid, 62.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 106 IncrementalHoareTripleChecker+Unchecked, 512 mSDsCounter, 478 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2359 IncrementalHoareTripleChecker+Invalid, 2955 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 478 mSolverCounterUnsat, 235 mSDtfsCounter, 2359 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1461 GetRequests, 1191 SyntacticMatches, 41 SemanticMatches, 229 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2385 ImplicationChecksByTransitivity, 316.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=118occurred in iteration=10, InterpolantAutomatonStates: 106, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 11 MinimizatonAttempts, 35 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 66 PreInvPairs, 122 NumberOfFragments, 954 HoareAnnotationTreeSize, 66 FomulaSimplifications, 1968 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 11 FomulaSimplificationsInter, 16683 FormulaSimplificationTreeSizeReductionInter, 12.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 232.9s InterpolantComputationTime, 541 NumberOfCodeBlocks, 464 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 973 ConstructedInterpolants, 6 QuantifiedInterpolants, 13246 SizeOfPredicates, 39 NumberOfNonLiveVariables, 1307 ConjunctsInSsa, 245 ConjunctsInUnsatCore, 19 InterpolantComputations, 3 PerfectInterpolantSequences, 3144/3559 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.6s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 11, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 9, TOOLS_POST_TIME: 0.0s, TOOLS_POST_CALL_APPLICATIONS: 7, TOOLS_POST_CALL_TIME: 0.2s, TOOLS_POST_RETURN_APPLICATIONS: 4, TOOLS_POST_RETURN_TIME: 0.1s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 20, TOOLS_QUANTIFIERELIM_TIME: 0.3s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 29, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 8, DOMAIN_JOIN_TIME: 0.2s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 11, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 4, CALL_SUMMARIZER_CACHE_MISSES: 1, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 65, DAG_COMPRESSION_RETAINED_NODES: 33, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((1 <= p && A == q + r) && d == p) && B == 1 - InvariantResult [Line: 59]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((((A == r && 1 <= r) && d == p) && B * (p / 2) + B * q + r == d / 2 + A) && B == 1) && 2 == d) || ((((((4 <= p && 2 * (B * (-(-p / -2) / -2)) <= r) && q == 0) && A == r) && d == p) && d == 2 * (-p / -2 * B)) && 0 == -p / -2 % 2)) || (((((((((((((((((((((((((((unknown-#memory_int-unknown[2][7] == 0 && unknown-#length-unknown[3] == 12) && 114 == unknown-#memory_int-unknown[2][2]) && (if A <= 100 && 0 <= A then 1 else 0) == unknown-#in~cond-unknown) && unknown-#memory_int-unknown[2][6] == 99) && 97 == unknown-#memory_int-unknown[2][1]) && 2 == unknown-#length-unknown[1]) && B == d) && \valid[3] == 1) && unknown-#memory_int-unknown[2][4] == 50) && 100 == unknown-#memory_int-unknown[2][3]) && q == 0) && unknown-#in~cond-unknown == cond) && \valid[1] == 1) && A == r) && \valid[0] == 0) && !(cond == 0)) && unknown-#memory_int-unknown[2][5] == 46) && \valid[2] == 1) && d == p) && #NULL == 0) && 8 == unknown-#length-unknown[2]) && unknown-#memory_int-unknown[1][0] == 48) && B == 1) && unknown-#memory_int-unknown[1][1] == 0) && unknown-#memory_int-unknown[2][0] == 104) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0) RESULT: Ultimate proved your program to be correct! [2022-11-23 14:19:20,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aacb9e0-b147-4c7d-aff5-eb840cbf5907/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE