./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.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_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/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_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/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_b219a5de-4be0-47e9-bb35-9b613cbcdf72/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 e587d407128aaafd417211e5ccf66790913a0bc1afeba03ae0cdb578f5831614 --- 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 15:49:46,057 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:49:46,060 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:49:46,082 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:49:46,083 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:49:46,084 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:49:46,085 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:49:46,086 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:49:46,088 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:49:46,089 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:49:46,090 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:49:46,091 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:49:46,091 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:49:46,092 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:49:46,093 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:49:46,094 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:49:46,095 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:49:46,096 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:49:46,097 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:49:46,099 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:49:46,100 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:49:46,102 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:49:46,103 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:49:46,104 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:49:46,107 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:49:46,108 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:49:46,108 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:49:46,109 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:49:46,109 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:49:46,110 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:49:46,111 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:49:46,111 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:49:46,112 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:49:46,113 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:49:46,114 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:49:46,114 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:49:46,115 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:49:46,115 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:49:46,116 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:49:46,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:49:46,117 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:49:46,118 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:49:46,140 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:49:46,140 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:49:46,141 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:49:46,141 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:49:46,142 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:49:46,142 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:49:46,142 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:49:46,142 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:49:46,143 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:49:46,143 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:49:46,143 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:49:46,143 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:49:46,144 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:49:46,144 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:49:46,144 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:49:46,144 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:49:46,145 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:49:46,145 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:49:46,146 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:49:46,146 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:49:46,146 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:49:46,146 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:49:46,146 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:49:46,147 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:49:46,147 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:49:46,147 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:49:46,147 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:49:46,148 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:49:46,148 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:49:46,148 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:49:46,148 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:49:46,149 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:49:46,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:49:46,149 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:49:46,149 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:49:46,150 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:49:46,150 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:49:46,150 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:49:46,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:49:46,151 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:49:46,151 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:49:46,151 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_b219a5de-4be0-47e9-bb35-9b613cbcdf72/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e587d407128aaafd417211e5ccf66790913a0bc1afeba03ae0cdb578f5831614 [2022-11-23 15:49:46,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:49:46,460 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:49:46,463 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:49:46,464 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:49:46,466 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:49:46,467 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c [2022-11-23 15:49:49,580 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:49:49,851 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:49:49,852 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c [2022-11-23 15:49:49,859 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/data/0ca4b8796/5b0ebf95a1c347af8a9c06388b9af4f1/FLAG484d7f07b [2022-11-23 15:49:49,873 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/data/0ca4b8796/5b0ebf95a1c347af8a9c06388b9af4f1 [2022-11-23 15:49:49,876 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:49:49,877 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:49:49,879 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:49:49,879 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:49:49,883 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:49:49,883 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:49:49" (1/1) ... [2022-11-23 15:49:49,885 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e7e4e09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:49, skipping insertion in model container [2022-11-23 15:49:49,885 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:49:49" (1/1) ... [2022-11-23 15:49:49,893 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:49:49,909 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:49:50,056 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_b219a5de-4be0-47e9-bb35-9b613cbcdf72/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c[490,503] [2022-11-23 15:49:50,079 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:49:50,090 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:49:50,103 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_b219a5de-4be0-47e9-bb35-9b613cbcdf72/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c[490,503] [2022-11-23 15:49:50,113 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:49:50,126 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:49:50,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:50 WrapperNode [2022-11-23 15:49:50,127 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:49:50,128 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:49:50,128 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:49:50,128 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:49:50,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:50" (1/1) ... [2022-11-23 15:49:50,143 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:50" (1/1) ... [2022-11-23 15:49:50,162 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2022-11-23 15:49:50,163 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:49:50,164 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:49:50,164 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:49:50,164 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:49:50,173 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:50" (1/1) ... [2022-11-23 15:49:50,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:50" (1/1) ... [2022-11-23 15:49:50,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:50" (1/1) ... [2022-11-23 15:49:50,175 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:50" (1/1) ... [2022-11-23 15:49:50,179 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:50" (1/1) ... [2022-11-23 15:49:50,183 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:50" (1/1) ... [2022-11-23 15:49:50,184 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:50" (1/1) ... [2022-11-23 15:49:50,185 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:50" (1/1) ... [2022-11-23 15:49:50,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:49:50,188 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:49:50,188 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:49:50,188 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:49:50,190 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:50" (1/1) ... [2022-11-23 15:49:50,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:49:50,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:49:50,243 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:49:50,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:49:50,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:49:50,294 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-23 15:49:50,294 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-23 15:49:50,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:49:50,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:49:50,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:49:50,295 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-23 15:49:50,295 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-23 15:49:50,371 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:49:50,375 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:49:50,628 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:49:50,651 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:49:50,651 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 15:49:50,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:49:50 BoogieIcfgContainer [2022-11-23 15:49:50,654 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:49:50,656 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:49:50,656 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:49:50,659 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:49:50,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:49:49" (1/3) ... [2022-11-23 15:49:50,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d348ca5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:49:50, skipping insertion in model container [2022-11-23 15:49:50,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:50" (2/3) ... [2022-11-23 15:49:50,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d348ca5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:49:50, skipping insertion in model container [2022-11-23 15:49:50,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:49:50" (3/3) ... [2022-11-23 15:49:50,662 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound20.c [2022-11-23 15:49:50,686 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:49:50,687 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:49:50,755 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:49:50,765 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;@1569ac4a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:49:50,765 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:49:50,770 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 16 states have internal predecessors, (20), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-23 15:49:50,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-23 15:49:50,781 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:49:50,782 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:49:50,783 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:49:50,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:49:50,791 INFO L85 PathProgramCache]: Analyzing trace with hash 966807424, now seen corresponding path program 1 times [2022-11-23 15:49:50,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:49:50,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637488594] [2022-11-23 15:49:50,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:49:50,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:49:50,913 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:49:50,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [901265384] [2022-11-23 15:49:50,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:49:50,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:49:50,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:49:50,918 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:49:50,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:49:51,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:49:51,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-23 15:49:51,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:49:51,117 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-23 15:49:51,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:49:51,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:49:51,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637488594] [2022-11-23 15:49:51,119 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:49:51,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901265384] [2022-11-23 15:49:51,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901265384] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:49:51,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:49:51,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:49:51,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973615947] [2022-11-23 15:49:51,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:49:51,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 15:49:51,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:49:51,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 15:49:51,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 15:49:51,188 INFO L87 Difference]: Start difference. First operand has 30 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 16 states have internal predecessors, (20), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-23 15:49:51,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:49:51,232 INFO L93 Difference]: Finished difference Result 49 states and 78 transitions. [2022-11-23 15:49:51,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 15:49:51,235 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 26 [2022-11-23 15:49:51,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:49:51,243 INFO L225 Difference]: With dead ends: 49 [2022-11-23 15:49:51,243 INFO L226 Difference]: Without dead ends: 28 [2022-11-23 15:49:51,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 15:49:51,250 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:49:51,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:49:51,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-23 15:49:51,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-23 15:49:51,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 15 states have internal predecessors, (16), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-23 15:49:51,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2022-11-23 15:49:51,293 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 39 transitions. Word has length 26 [2022-11-23 15:49:51,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:49:51,295 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 39 transitions. [2022-11-23 15:49:51,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-23 15:49:51,299 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 39 transitions. [2022-11-23 15:49:51,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-23 15:49:51,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:49:51,302 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:49:51,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:49:51,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:49:51,508 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:49:51,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:49:51,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1643993843, now seen corresponding path program 1 times [2022-11-23 15:49:51,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:49:51,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802854251] [2022-11-23 15:49:51,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:49:51,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:49:51,538 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:49:51,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1856696719] [2022-11-23 15:49:51,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:49:51,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:49:51,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:49:51,540 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:49:51,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:49:51,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:49:51,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 15:49:51,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:49:51,693 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-23 15:49:51,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:49:51,841 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-23 15:49:51,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:49:51,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802854251] [2022-11-23 15:49:51,842 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:49:51,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856696719] [2022-11-23 15:49:51,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856696719] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:49:51,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [481366235] [2022-11-23 15:49:51,878 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-23 15:49:51,878 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:49:51,882 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:49:51,893 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:49:51,899 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:49:53,122 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-23 15:49:53,148 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:49:54,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [481366235] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:49:54,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:49:54,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5, 5] total 14 [2022-11-23 15:49:54,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440578928] [2022-11-23 15:49:54,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:49:54,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 15:49:54,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:49:54,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 15:49:54,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-11-23 15:49:54,219 INFO L87 Difference]: Start difference. First operand 28 states and 39 transitions. Second operand has 11 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-23 15:49:54,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:49:54,425 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2022-11-23 15:49:54,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 15:49:54,425 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 27 [2022-11-23 15:49:54,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:49:54,427 INFO L225 Difference]: With dead ends: 38 [2022-11-23 15:49:54,427 INFO L226 Difference]: Without dead ends: 30 [2022-11-23 15:49:54,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 62 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-11-23 15:49:54,429 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 48 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:49:54,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 48 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:49:54,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-23 15:49:54,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-23 15:49:54,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-23 15:49:54,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2022-11-23 15:49:54,445 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 27 [2022-11-23 15:49:54,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:49:54,446 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2022-11-23 15:49:54,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-23 15:49:54,446 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2022-11-23 15:49:54,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-23 15:49:54,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:49:54,448 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:49:54,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:49:54,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:49:54,654 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:49:54,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:49:54,654 INFO L85 PathProgramCache]: Analyzing trace with hash -575116102, now seen corresponding path program 1 times [2022-11-23 15:49:54,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:49:54,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889896860] [2022-11-23 15:49:54,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:49:54,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:49:54,675 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:49:54,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1568042222] [2022-11-23 15:49:54,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:49:54,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:49:54,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:49:54,680 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:49:54,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:49:54,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:49:54,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 15:49:54,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:49:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-23 15:49:54,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:49:54,930 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-23 15:49:54,931 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:49:54,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889896860] [2022-11-23 15:49:54,932 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:49:54,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568042222] [2022-11-23 15:49:54,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568042222] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 15:49:54,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:49:54,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-11-23 15:49:54,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766590542] [2022-11-23 15:49:54,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:49:54,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:49:54,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:49:54,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:49:54,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:49:54,938 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-23 15:49:55,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:49:55,021 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-11-23 15:49:55,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:49:55,022 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 28 [2022-11-23 15:49:55,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:49:55,026 INFO L225 Difference]: With dead ends: 36 [2022-11-23 15:49:55,026 INFO L226 Difference]: Without dead ends: 34 [2022-11-23 15:49:55,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:49:55,034 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 7 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:49:55,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 101 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:49:55,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-23 15:49:55,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-11-23 15:49:55,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-23 15:49:55,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2022-11-23 15:49:55,067 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 28 [2022-11-23 15:49:55,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:49:55,067 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2022-11-23 15:49:55,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-23 15:49:55,068 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2022-11-23 15:49:55,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-23 15:49:55,069 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:49:55,069 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:49:55,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 15:49:55,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:49:55,270 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:49:55,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:49:55,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1810277145, now seen corresponding path program 1 times [2022-11-23 15:49:55,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:49:55,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318253486] [2022-11-23 15:49:55,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:49:55,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:49:55,285 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:49:55,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [244718407] [2022-11-23 15:49:55,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:49:55,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:49:55,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:49:55,292 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:49:55,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:49:55,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:49:55,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-23 15:49:55,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:49:55,556 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-23 15:49:55,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:49:55,679 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-23 15:49:55,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:49:55,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318253486] [2022-11-23 15:49:55,683 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:49:55,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244718407] [2022-11-23 15:49:55,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244718407] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 15:49:55,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:49:55,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 12 [2022-11-23 15:49:55,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835648829] [2022-11-23 15:49:55,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:49:55,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:49:55,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:49:55,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:49:55,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:49:55,693 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 15:49:55,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:49:55,771 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2022-11-23 15:49:55,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:49:55,772 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 33 [2022-11-23 15:49:55,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:49:55,773 INFO L225 Difference]: With dead ends: 47 [2022-11-23 15:49:55,773 INFO L226 Difference]: Without dead ends: 45 [2022-11-23 15:49:55,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-11-23 15:49:55,774 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:49:55,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 122 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:49:55,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-23 15:49:55,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-11-23 15:49:55,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-23 15:49:55,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 58 transitions. [2022-11-23 15:49:55,797 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 58 transitions. Word has length 33 [2022-11-23 15:49:55,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:49:55,797 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 58 transitions. [2022-11-23 15:49:55,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 15:49:55,798 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 58 transitions. [2022-11-23 15:49:55,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-23 15:49:55,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:49:55,799 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:49:55,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 15:49:56,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-23 15:49:56,012 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:49:56,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:49:56,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1313498982, now seen corresponding path program 1 times [2022-11-23 15:49:56,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:49:56,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232799122] [2022-11-23 15:49:56,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:49:56,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:49:56,027 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:49:56,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1767358479] [2022-11-23 15:49:56,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:49:56,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:49:56,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:49:56,029 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:49:56,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:49:56,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:49:56,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-23 15:49:56,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:49:56,475 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-23 15:49:56,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:49:56,674 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-23 15:49:56,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:49:56,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232799122] [2022-11-23 15:49:56,674 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:49:56,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767358479] [2022-11-23 15:49:56,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767358479] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 15:49:56,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:49:56,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 15 [2022-11-23 15:49:56,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768030032] [2022-11-23 15:49:56,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:49:56,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:49:56,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:49:56,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:49:56,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-11-23 15:49:56,677 INFO L87 Difference]: Start difference. First operand 44 states and 58 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-23 15:49:56,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:49:56,795 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2022-11-23 15:49:56,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:49:56,795 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 38 [2022-11-23 15:49:56,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:49:56,796 INFO L225 Difference]: With dead ends: 51 [2022-11-23 15:49:56,797 INFO L226 Difference]: Without dead ends: 49 [2022-11-23 15:49:56,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-11-23 15:49:56,798 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:49:56,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 128 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:49:56,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-23 15:49:56,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-11-23 15:49:56,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-23 15:49:56,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2022-11-23 15:49:56,858 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 38 [2022-11-23 15:49:56,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:49:56,861 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2022-11-23 15:49:56,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-23 15:49:56,862 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2022-11-23 15:49:56,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-23 15:49:56,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:49:56,863 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:49:56,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 15:49:57,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:49:57,070 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:49:57,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:49:57,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1793667961, now seen corresponding path program 1 times [2022-11-23 15:49:57,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:49:57,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326183488] [2022-11-23 15:49:57,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:49:57,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:49:57,087 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:49:57,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [790525443] [2022-11-23 15:49:57,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:49:57,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:49:57,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:49:57,089 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:49:57,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 15:49:57,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:49:57,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-23 15:49:57,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:49:57,463 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-23 15:49:57,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:49:57,573 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:49:57,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326183488] [2022-11-23 15:49:57,573 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:49:57,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790525443] [2022-11-23 15:49:57,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790525443] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:49:57,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1412780821] [2022-11-23 15:49:57,577 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-23 15:49:57,577 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:49:57,577 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:49:57,578 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:49:57,578 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:49:58,626 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2022-11-23 15:49:58,637 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-23 15:49:58,660 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:50:00,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1412780821] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:50:00,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:50:00,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [10] total 22 [2022-11-23 15:50:00,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532318881] [2022-11-23 15:50:00,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:50:00,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 15:50:00,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:50:00,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 15:50:00,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2022-11-23 15:50:00,728 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-23 15:50:01,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:50:01,107 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2022-11-23 15:50:01,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 15:50:01,113 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 43 [2022-11-23 15:50:01,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:50:01,114 INFO L225 Difference]: With dead ends: 73 [2022-11-23 15:50:01,114 INFO L226 Difference]: Without dead ends: 71 [2022-11-23 15:50:01,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 54 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2022-11-23 15:50:01,116 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:50:01,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 50 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:50:01,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-23 15:50:01,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2022-11-23 15:50:01,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 41 states have internal predecessors, (43), 20 states have call successors, (20), 9 states have call predecessors, (20), 9 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-23 15:50:01,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2022-11-23 15:50:01,169 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 43 [2022-11-23 15:50:01,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:50:01,170 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2022-11-23 15:50:01,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-23 15:50:01,172 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2022-11-23 15:50:01,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-23 15:50:01,178 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:50:01,178 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:50:01,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 15:50:01,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-23 15:50:01,384 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:50:01,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:50:01,385 INFO L85 PathProgramCache]: Analyzing trace with hash 434944611, now seen corresponding path program 1 times [2022-11-23 15:50:01,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:50:01,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085253910] [2022-11-23 15:50:01,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:50:01,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:50:01,398 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:50:01,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1535727422] [2022-11-23 15:50:01,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:50:01,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:50:01,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:50:01,400 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:50:01,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 15:50:01,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:50:01,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 15:50:01,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:50:01,529 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-23 15:50:01,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:50:01,611 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-23 15:50:01,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:50:01,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085253910] [2022-11-23 15:50:01,612 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:50:01,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535727422] [2022-11-23 15:50:01,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535727422] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:50:01,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [759929668] [2022-11-23 15:50:01,617 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-23 15:50:01,617 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:50:01,621 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:50:01,622 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:50:01,622 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:50:14,279 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-11-23 15:50:14,289 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-23 15:50:14,300 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:50:18,536 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2208#(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 15:50:18,537 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:50:18,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:50:18,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-11-23 15:50:18,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202337449] [2022-11-23 15:50:18,537 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:50:18,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:50:18,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:50:18,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:50:18,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2022-11-23 15:50:18,539 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-23 15:50:18,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:50:18,888 INFO L93 Difference]: Finished difference Result 111 states and 148 transitions. [2022-11-23 15:50:18,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 15:50:18,889 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 52 [2022-11-23 15:50:18,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:50:18,896 INFO L225 Difference]: With dead ends: 111 [2022-11-23 15:50:18,896 INFO L226 Difference]: Without dead ends: 103 [2022-11-23 15:50:18,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 118 SyntacticMatches, 14 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2022-11-23 15:50:18,898 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 34 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:50:18,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 177 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:50:18,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-11-23 15:50:18,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2022-11-23 15:50:18,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 53 states have internal predecessors, (61), 32 states have call successors, (32), 9 states have call predecessors, (32), 9 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-23 15:50:18,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 124 transitions. [2022-11-23 15:50:18,944 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 124 transitions. Word has length 52 [2022-11-23 15:50:18,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:50:18,945 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 124 transitions. [2022-11-23 15:50:18,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-23 15:50:18,945 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 124 transitions. [2022-11-23 15:50:18,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-23 15:50:18,946 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:50:18,946 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:50:18,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 15:50:19,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:50:19,148 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:50:19,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:50:19,149 INFO L85 PathProgramCache]: Analyzing trace with hash -243308457, now seen corresponding path program 1 times [2022-11-23 15:50:19,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:50:19,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798413942] [2022-11-23 15:50:19,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:50:19,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:50:19,165 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:50:19,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1711538913] [2022-11-23 15:50:19,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:50:19,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:50:19,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:50:19,172 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:50:19,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 15:50:19,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:50:19,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 15:50:19,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:50:19,392 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-23 15:50:19,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:50:19,543 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-23 15:50:19,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:50:19,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798413942] [2022-11-23 15:50:19,544 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:50:19,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711538913] [2022-11-23 15:50:19,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711538913] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:50:19,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2001763280] [2022-11-23 15:50:19,547 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-23 15:50:19,547 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:50:19,548 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:50:19,548 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:50:19,549 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:50:29,642 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2022-11-23 15:50:29,651 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-23 15:50:29,666 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:50:34,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2001763280] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:50:34,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:50:34,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [9, 7] total 28 [2022-11-23 15:50:34,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430459997] [2022-11-23 15:50:34,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:50:34,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 15:50:34,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:50:34,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 15:50:34,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2022-11-23 15:50:34,242 INFO L87 Difference]: Start difference. First operand 94 states and 124 transitions. Second operand has 17 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-23 15:50:35,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:50:35,425 INFO L93 Difference]: Finished difference Result 113 states and 146 transitions. [2022-11-23 15:50:35,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 15:50:35,426 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 58 [2022-11-23 15:50:35,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:50:35,427 INFO L225 Difference]: With dead ends: 113 [2022-11-23 15:50:35,427 INFO L226 Difference]: Without dead ends: 111 [2022-11-23 15:50:35,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 130 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2022-11-23 15:50:35,429 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 57 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:50:35,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 58 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 15:50:35,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-23 15:50:35,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-11-23 15:50:35,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 64 states have internal predecessors, (73), 36 states have call successors, (36), 11 states have call predecessors, (36), 11 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-11-23 15:50:35,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 144 transitions. [2022-11-23 15:50:35,494 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 144 transitions. Word has length 58 [2022-11-23 15:50:35,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:50:35,495 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 144 transitions. [2022-11-23 15:50:35,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-23 15:50:35,495 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 144 transitions. [2022-11-23 15:50:35,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-23 15:50:35,498 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:50:35,499 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:50:35,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 15:50:35,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:50:35,705 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:50:35,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:50:35,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1984692712, now seen corresponding path program 1 times [2022-11-23 15:50:35,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:50:35,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75414159] [2022-11-23 15:50:35,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:50:35,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:50:35,717 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:50:35,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1617969435] [2022-11-23 15:50:35,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:50:35,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:50:35,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:50:35,719 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:50:35,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 15:50:35,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:50:35,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 15:50:35,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:50:35,883 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-23 15:50:35,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:50:35,983 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-23 15:50:35,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:50:35,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75414159] [2022-11-23 15:50:35,984 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:50:35,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617969435] [2022-11-23 15:50:35,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617969435] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:50:35,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [588198923] [2022-11-23 15:50:35,986 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-23 15:50:35,987 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:50:35,987 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:50:35,987 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:50:35,987 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:50:40,678 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2022-11-23 15:50:40,723 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-23 15:50:40,736 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:50:44,153 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3657#(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 15:50:44,153 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:50:44,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:50:44,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-11-23 15:50:44,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795053092] [2022-11-23 15:50:44,154 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:50:44,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 15:50:44,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:50:44,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 15:50:44,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-11-23 15:50:44,156 INFO L87 Difference]: Start difference. First operand 111 states and 144 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-23 15:50:44,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:50:44,432 INFO L93 Difference]: Finished difference Result 122 states and 158 transitions. [2022-11-23 15:50:44,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:50:44,433 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 65 [2022-11-23 15:50:44,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:50:44,435 INFO L225 Difference]: With dead ends: 122 [2022-11-23 15:50:44,435 INFO L226 Difference]: Without dead ends: 120 [2022-11-23 15:50:44,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 157 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2022-11-23 15:50:44,437 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 14 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:50:44,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 103 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:50:44,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-23 15:50:44,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-11-23 15:50:44,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 69 states have internal predecessors, (77), 40 states have call successors, (40), 12 states have call predecessors, (40), 12 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2022-11-23 15:50:44,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 156 transitions. [2022-11-23 15:50:44,486 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 156 transitions. Word has length 65 [2022-11-23 15:50:44,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:50:44,486 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 156 transitions. [2022-11-23 15:50:44,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-23 15:50:44,487 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 156 transitions. [2022-11-23 15:50:44,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-23 15:50:44,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:50:44,488 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:50:44,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 15:50:44,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:50:44,694 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:50:44,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:50:44,695 INFO L85 PathProgramCache]: Analyzing trace with hash -2003369438, now seen corresponding path program 1 times [2022-11-23 15:50:44,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:50:44,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437898513] [2022-11-23 15:50:44,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:50:44,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:50:44,717 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:50:44,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [159998219] [2022-11-23 15:50:44,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:50:44,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:50:44,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:50:44,719 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:50:44,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 15:50:44,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:50:44,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-23 15:50:44,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:50:45,321 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-11-23 15:50:45,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:50:46,165 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-23 15:50:46,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:50:46,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437898513] [2022-11-23 15:50:46,165 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:50:46,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159998219] [2022-11-23 15:50:46,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159998219] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:50:46,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1159276853] [2022-11-23 15:50:46,168 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-23 15:50:46,168 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:50:46,169 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:50:46,169 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:50:46,169 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:50:50,786 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-23 15:50:50,790 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-23 15:50:50,803 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:51:09,452 WARN L233 SmtUtils]: Spent 10.92s on a formula simplification. DAG size of input: 83 DAG size of output: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:51:22,815 WARN L233 SmtUtils]: Spent 11.50s on a formula simplification. DAG size of input: 85 DAG size of output: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:51:23,209 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4509#(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 15:51:23,209 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:51:23,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:51:23,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2022-11-23 15:51:23,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564691942] [2022-11-23 15:51:23,210 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:51:23,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-23 15:51:23,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:51:23,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-23 15:51:23,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1367, Unknown=0, NotChecked=0, Total=1560 [2022-11-23 15:51:23,212 INFO L87 Difference]: Start difference. First operand 120 states and 156 transitions. Second operand has 20 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-23 15:51:34,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:51:34,870 INFO L93 Difference]: Finished difference Result 199 states and 279 transitions. [2022-11-23 15:51:34,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-23 15:51:34,871 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 74 [2022-11-23 15:51:34,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:51:34,872 INFO L225 Difference]: With dead ends: 199 [2022-11-23 15:51:34,873 INFO L226 Difference]: Without dead ends: 197 [2022-11-23 15:51:34,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 170 SyntacticMatches, 12 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 39.4s TimeCoverageRelationStatistics Valid=437, Invalid=3103, Unknown=0, NotChecked=0, Total=3540 [2022-11-23 15:51:34,874 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 118 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:51:34,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 314 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-11-23 15:51:34,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-11-23 15:51:34,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 187. [2022-11-23 15:51:34,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 99 states have (on average 1.2222222222222223) internal successors, (121), 101 states have internal predecessors, (121), 73 states have call successors, (73), 14 states have call predecessors, (73), 14 states have return successors, (72), 71 states have call predecessors, (72), 72 states have call successors, (72) [2022-11-23 15:51:34,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 266 transitions. [2022-11-23 15:51:34,970 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 266 transitions. Word has length 74 [2022-11-23 15:51:34,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:51:34,971 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 266 transitions. [2022-11-23 15:51:34,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-23 15:51:34,971 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 266 transitions. [2022-11-23 15:51:34,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-23 15:51:34,972 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:51:34,972 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:51:34,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 15:51:35,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 15:51:35,173 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:51:35,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:51:35,174 INFO L85 PathProgramCache]: Analyzing trace with hash -134461569, now seen corresponding path program 1 times [2022-11-23 15:51:35,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:51:35,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370496927] [2022-11-23 15:51:35,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:51:35,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:51:35,183 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:51:35,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1479112292] [2022-11-23 15:51:35,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:51:35,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:51:35,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:51:35,185 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:51:35,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 15:51:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:51:35,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-23 15:51:35,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:51:35,805 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 39 proven. 16 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-23 15:51:35,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:51:36,238 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-11-23 15:51:36,238 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:51:36,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370496927] [2022-11-23 15:51:36,239 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:51:36,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479112292] [2022-11-23 15:51:36,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479112292] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:51:36,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1739282853] [2022-11-23 15:51:36,241 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-23 15:51:36,242 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:51:36,242 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:51:36,242 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:51:36,242 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:51:40,141 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-23 15:51:40,145 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-23 15:51:40,158 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:52:01,242 WARN L233 SmtUtils]: Spent 14.54s on a formula simplification. DAG size of input: 83 DAG size of output: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:52:10,914 WARN L233 SmtUtils]: Spent 8.42s on a formula simplification. DAG size of input: 85 DAG size of output: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:52:11,639 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5668#(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 15:52:11,640 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:52:11,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:52:11,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 19 [2022-11-23 15:52:11,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244434951] [2022-11-23 15:52:11,641 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:52:11,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-23 15:52:11,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:52:11,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-23 15:52:11,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1366, Unknown=1, NotChecked=0, Total=1560 [2022-11-23 15:52:11,642 INFO L87 Difference]: Start difference. First operand 187 states and 266 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 15 states have internal predecessors, (36), 9 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2022-11-23 15:52:16,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:52:16,594 INFO L93 Difference]: Finished difference Result 231 states and 326 transitions. [2022-11-23 15:52:16,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 15:52:16,594 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 15 states have internal predecessors, (36), 9 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 79 [2022-11-23 15:52:16,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:52:16,597 INFO L225 Difference]: With dead ends: 231 [2022-11-23 15:52:16,597 INFO L226 Difference]: Without dead ends: 225 [2022-11-23 15:52:16,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 189 SyntacticMatches, 13 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 35.1s TimeCoverageRelationStatistics Valid=329, Invalid=2322, Unknown=1, NotChecked=0, Total=2652 [2022-11-23 15:52:16,599 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 57 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-23 15:52:16,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 168 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-23 15:52:16,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-11-23 15:52:16,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 197. [2022-11-23 15:52:16,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 109 states have internal predecessors, (127), 71 states have call successors, (71), 17 states have call predecessors, (71), 17 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2022-11-23 15:52:16,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 268 transitions. [2022-11-23 15:52:16,692 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 268 transitions. Word has length 79 [2022-11-23 15:52:16,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:52:16,693 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 268 transitions. [2022-11-23 15:52:16,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 15 states have internal predecessors, (36), 9 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2022-11-23 15:52:16,693 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 268 transitions. [2022-11-23 15:52:16,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-23 15:52:16,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:52:16,694 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:52:16,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 15:52:16,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:52:16,901 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:52:16,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:52:16,901 INFO L85 PathProgramCache]: Analyzing trace with hash 145896886, now seen corresponding path program 1 times [2022-11-23 15:52:16,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:52:16,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621185577] [2022-11-23 15:52:16,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:52:16,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:52:16,916 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:52:16,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [326193645] [2022-11-23 15:52:16,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:52:16,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:52:16,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:52:16,919 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:52:16,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 15:52:17,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:52:17,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-23 15:52:17,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:52:18,389 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 80 proven. 40 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-11-23 15:52:18,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:53:38,028 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 79 proven. 32 refuted. 1 times theorem prover too weak. 178 trivial. 0 not checked. [2022-11-23 15:53:38,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:53:38,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621185577] [2022-11-23 15:53:38,029 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:53:38,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326193645] [2022-11-23 15:53:38,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326193645] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:53:38,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [841450442] [2022-11-23 15:53:38,038 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-23 15:53:38,039 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:53:38,039 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:53:38,040 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:53:38,040 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:53:40,355 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2022-11-23 15:53:40,389 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-23 15:53:40,402 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:54:12,996 WARN L233 SmtUtils]: Spent 19.14s on a formula simplification. DAG size of input: 178 DAG size of output: 145 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:54:49,222 WARN L233 SmtUtils]: Spent 16.88s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:55:13,751 WARN L233 SmtUtils]: Spent 19.06s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:55:14,161 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6953#(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 15:55:14,162 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:55:14,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:55:14,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2022-11-23 15:55:14,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870000967] [2022-11-23 15:55:14,162 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:55:14,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-23 15:55:14,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:55:14,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-23 15:55:14,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1783, Unknown=10, NotChecked=0, Total=2070 [2022-11-23 15:55:14,164 INFO L87 Difference]: Start difference. First operand 197 states and 268 transitions. Second operand has 26 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 21 states have internal predecessors, (40), 13 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (34), 14 states have call predecessors, (34), 12 states have call successors, (34) [2022-11-23 15:55:16,762 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 15:55:18,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:55:19,912 WARN L539 Checker$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 15:55:22,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:55:24,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:55:29,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.35s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:55:32,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:55:34,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:55:36,680 WARN L539 Checker$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 15:56:27,836 WARN L233 SmtUtils]: Spent 50.31s on a formula simplification. DAG size of input: 80 DAG size of output: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:56:40,619 WARN L233 SmtUtils]: Spent 11.45s on a formula simplification. DAG size of input: 70 DAG size of output: 69 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:56:58,984 WARN L233 SmtUtils]: Spent 14.94s on a formula simplification. DAG size of input: 66 DAG size of output: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:57:09,141 WARN L233 SmtUtils]: Spent 9.41s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:57:11,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:57:18,448 WARN L233 SmtUtils]: Spent 6.58s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:57:20,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:57:22,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:57:24,833 WARN L539 Checker$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 15:57:26,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:58:16,844 WARN L233 SmtUtils]: Spent 49.59s on a formula simplification. DAG size of input: 81 DAG size of output: 80 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:58:35,558 WARN L233 SmtUtils]: Spent 18.56s on a formula simplification. DAG size of input: 71 DAG size of output: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:58:38,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:58:40,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:58:55,950 WARN L233 SmtUtils]: Spent 12.76s on a formula simplification. DAG size of input: 66 DAG size of output: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:59:40,207 WARN L233 SmtUtils]: Spent 41.09s on a formula simplification. DAG size of input: 82 DAG size of output: 81 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:59:42,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:59:44,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:59:48,719 WARN L539 Checker$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 15:59:49,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:59:49,970 INFO L93 Difference]: Finished difference Result 234 states and 316 transitions. [2022-11-23 15:59:49,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-23 15:59:49,971 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 21 states have internal predecessors, (40), 13 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (34), 14 states have call predecessors, (34), 12 states have call successors, (34) Word has length 90 [2022-11-23 15:59:49,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:59:49,973 INFO L225 Difference]: With dead ends: 234 [2022-11-23 15:59:49,973 INFO L226 Difference]: Without dead ends: 232 [2022-11-23 15:59:49,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 209 SyntacticMatches, 15 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1730 ImplicationChecksByTransitivity, 338.3s TimeCoverageRelationStatistics Valid=553, Invalid=3096, Unknown=11, NotChecked=0, Total=3660 [2022-11-23 15:59:49,974 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 156 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 233 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 1141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:59:49,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 131 Invalid, 1141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 894 Invalid, 14 Unknown, 0 Unchecked, 53.0s Time] [2022-11-23 15:59:49,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-11-23 15:59:50,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 226. [2022-11-23 15:59:50,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 123 states have (on average 1.1626016260162602) internal successors, (143), 127 states have internal predecessors, (143), 83 states have call successors, (83), 19 states have call predecessors, (83), 19 states have return successors, (82), 79 states have call predecessors, (82), 82 states have call successors, (82) [2022-11-23 15:59:50,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 308 transitions. [2022-11-23 15:59:50,161 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 308 transitions. Word has length 90 [2022-11-23 15:59:50,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:59:50,161 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 308 transitions. [2022-11-23 15:59:50,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 21 states have internal predecessors, (40), 13 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (34), 14 states have call predecessors, (34), 12 states have call successors, (34) [2022-11-23 15:59:50,162 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 308 transitions. [2022-11-23 15:59:50,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-23 15:59:50,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:59:50,163 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:59:50,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 15:59:50,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 15:59:50,364 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:59:50,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:59:50,365 INFO L85 PathProgramCache]: Analyzing trace with hash 2106799636, now seen corresponding path program 2 times [2022-11-23 15:59:50,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:59:50,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042381504] [2022-11-23 15:59:50,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:59:50,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:59:50,378 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:59:50,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [216718088] [2022-11-23 15:59:50,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:59:50,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:59:50,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:59:50,380 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:59:50,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 15:59:50,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 15:59:50,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:59:50,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 15:59:50,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:59:50,488 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-11-23 15:59:50,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:59:50,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:59:50,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042381504] [2022-11-23 15:59:50,489 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:59:50,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216718088] [2022-11-23 15:59:50,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216718088] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:59:50,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:59:50,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:59:50,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055955207] [2022-11-23 15:59:50,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:59:50,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:59:50,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:59:50,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:59:50,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:59:50,492 INFO L87 Difference]: Start difference. First operand 226 states and 308 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-23 15:59:50,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:59:50,795 INFO L93 Difference]: Finished difference Result 325 states and 441 transitions. [2022-11-23 15:59:50,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:59:50,796 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 99 [2022-11-23 15:59:50,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:59:50,797 INFO L225 Difference]: With dead ends: 325 [2022-11-23 15:59:50,798 INFO L226 Difference]: Without dead ends: 211 [2022-11-23 15:59:50,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:59:50,800 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 7 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:59:50,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 128 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:59:50,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-23 15:59:50,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 179. [2022-11-23 15:59:50,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 100 states have (on average 1.12) internal successors, (112), 103 states have internal predecessors, (112), 59 states have call successors, (59), 19 states have call predecessors, (59), 19 states have return successors, (58), 56 states have call predecessors, (58), 58 states have call successors, (58) [2022-11-23 15:59:50,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 229 transitions. [2022-11-23 15:59:50,939 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 229 transitions. Word has length 99 [2022-11-23 15:59:50,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:59:50,939 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 229 transitions. [2022-11-23 15:59:50,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-23 15:59:50,940 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 229 transitions. [2022-11-23 15:59:50,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-23 15:59:50,941 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:59:50,941 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:59:50,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 15:59:51,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 15:59:51,142 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:59:51,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:59:51,142 INFO L85 PathProgramCache]: Analyzing trace with hash -425141716, now seen corresponding path program 2 times [2022-11-23 15:59:51,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:59:51,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430028365] [2022-11-23 15:59:51,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:59:51,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:59:51,164 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:59:51,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [456619720] [2022-11-23 15:59:51,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:59:51,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:59:51,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:59:51,166 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:59:51,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 15:59:51,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-23 15:59:51,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:59:51,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-23 15:59:51,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:59:51,852 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 33 proven. 32 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2022-11-23 15:59:51,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:59:52,249 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2022-11-23 15:59:52,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:59:52,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430028365] [2022-11-23 15:59:52,250 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:59:52,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456619720] [2022-11-23 15:59:52,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456619720] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:59:52,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [561984555] [2022-11-23 15:59:52,252 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-23 15:59:52,253 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:59:52,253 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:59:52,253 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:59:52,254 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:59:56,746 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-23 15:59:56,751 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-23 15:59:56,767 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:00:19,721 WARN L233 SmtUtils]: Spent 12.46s on a formula simplification. DAG size of input: 83 DAG size of output: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:00:35,889 WARN L233 SmtUtils]: Spent 12.37s on a formula simplification. DAG size of input: 85 DAG size of output: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:00:36,342 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9469#(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 16:00:36,342 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:00:36,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 16:00:36,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2022-11-23 16:00:36,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793531043] [2022-11-23 16:00:36,343 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 16:00:36,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 16:00:36,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:00:36,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 16:00:36,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2022-11-23 16:00:36,345 INFO L87 Difference]: Start difference. First operand 179 states and 229 transitions. Second operand has 17 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2022-11-23 16:00:40,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:00:40,743 INFO L93 Difference]: Finished difference Result 210 states and 273 transitions. [2022-11-23 16:00:40,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-23 16:00:40,744 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) Word has length 107 [2022-11-23 16:00:40,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:00:40,746 INFO L225 Difference]: With dead ends: 210 [2022-11-23 16:00:40,746 INFO L226 Difference]: Without dead ends: 208 [2022-11-23 16:00:40,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 265 SyntacticMatches, 20 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 41.3s TimeCoverageRelationStatistics Valid=253, Invalid=1727, Unknown=0, NotChecked=0, Total=1980 [2022-11-23 16:00:40,748 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 48 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-23 16:00:40,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 208 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-23 16:00:40,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-11-23 16:00:40,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 183. [2022-11-23 16:00:40,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 103 states have (on average 1.116504854368932) internal successors, (115), 106 states have internal predecessors, (115), 59 states have call successors, (59), 20 states have call predecessors, (59), 20 states have return successors, (58), 56 states have call predecessors, (58), 58 states have call successors, (58) [2022-11-23 16:00:40,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 232 transitions. [2022-11-23 16:00:40,886 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 232 transitions. Word has length 107 [2022-11-23 16:00:40,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:00:40,886 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 232 transitions. [2022-11-23 16:00:40,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2022-11-23 16:00:40,887 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 232 transitions. [2022-11-23 16:00:40,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-23 16:00:40,888 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:00:40,889 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:00:40,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-23 16:00:41,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:00:41,093 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:00:41,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:00:41,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1538893617, now seen corresponding path program 3 times [2022-11-23 16:00:41,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:00:41,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277024943] [2022-11-23 16:00:41,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:00:41,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:00:41,103 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 16:00:41,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1013244112] [2022-11-23 16:00:41,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 16:00:41,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:00:41,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:00:41,105 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:00:41,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-23 16:00:41,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 16:00:41,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:00:41,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-23 16:00:41,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:00:42,165 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 34 proven. 46 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2022-11-23 16:00:42,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:00:47,156 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2022-11-23 16:00:47,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:00:47,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277024943] [2022-11-23 16:00:47,156 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 16:00:47,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013244112] [2022-11-23 16:00:47,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013244112] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:00:47,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [756948578] [2022-11-23 16:00:47,158 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-23 16:00:47,158 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:00:47,159 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:00:47,159 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:00:47,159 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:00:49,484 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2022-11-23 16:00:49,531 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-23 16:00:49,543 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:01:28,060 WARN L233 SmtUtils]: Spent 28.90s on a formula simplification. DAG size of input: 180 DAG size of output: 147 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:01:38,944 WARN L233 SmtUtils]: Spent 5.25s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:01:58,455 WARN L233 SmtUtils]: Spent 18.77s on a formula simplification. DAG size of input: 77 DAG size of output: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:02:20,687 WARN L233 SmtUtils]: Spent 18.62s on a formula simplification. DAG size of input: 178 DAG size of output: 84 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:02:20,741 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10858#(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 16:02:20,742 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:02:20,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 16:02:20,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2022-11-23 16:02:20,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775369072] [2022-11-23 16:02:20,742 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 16:02:20,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-23 16:02:20,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:02:20,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-23 16:02:20,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1902, Unknown=1, NotChecked=0, Total=2162 [2022-11-23 16:02:20,744 INFO L87 Difference]: Start difference. First operand 183 states and 232 transitions. Second operand has 27 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 14 states have call successors, (43), 3 states have call predecessors, (43), 2 states have return successors, (42), 12 states have call predecessors, (42), 12 states have call successors, (42) [2022-11-23 16:03:12,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:03:12,876 INFO L93 Difference]: Finished difference Result 325 states and 451 transitions. [2022-11-23 16:03:12,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-23 16:03:12,877 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 14 states have call successors, (43), 3 states have call predecessors, (43), 2 states have return successors, (42), 12 states have call predecessors, (42), 12 states have call successors, (42) Word has length 121 [2022-11-23 16:03:12,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:03:12,879 INFO L225 Difference]: With dead ends: 325 [2022-11-23 16:03:12,880 INFO L226 Difference]: Without dead ends: 317 [2022-11-23 16:03:12,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 297 SyntacticMatches, 19 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3241 ImplicationChecksByTransitivity, 120.0s TimeCoverageRelationStatistics Valid=1010, Invalid=6820, Unknown=2, NotChecked=0, Total=7832 [2022-11-23 16:03:12,883 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 252 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 507 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 2587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 507 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.6s IncrementalHoareTripleChecker+Time [2022-11-23 16:03:12,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 579 Invalid, 2587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [507 Valid, 2080 Invalid, 0 Unknown, 0 Unchecked, 26.6s Time] [2022-11-23 16:03:12,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-11-23 16:03:13,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 297. [2022-11-23 16:03:13,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 154 states have (on average 1.155844155844156) internal successors, (178), 157 states have internal predecessors, (178), 119 states have call successors, (119), 23 states have call predecessors, (119), 23 states have return successors, (118), 116 states have call predecessors, (118), 118 states have call successors, (118) [2022-11-23 16:03:13,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 415 transitions. [2022-11-23 16:03:13,264 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 415 transitions. Word has length 121 [2022-11-23 16:03:13,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:03:13,265 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 415 transitions. [2022-11-23 16:03:13,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 14 states have call successors, (43), 3 states have call predecessors, (43), 2 states have return successors, (42), 12 states have call predecessors, (42), 12 states have call successors, (42) [2022-11-23 16:03:13,265 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 415 transitions. [2022-11-23 16:03:13,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-23 16:03:13,267 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:03:13,267 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:03:13,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-23 16:03:13,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 16:03:13,474 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:03:13,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:03:13,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1914774331, now seen corresponding path program 3 times [2022-11-23 16:03:13,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:03:13,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057999041] [2022-11-23 16:03:13,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:03:13,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:03:13,487 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 16:03:13,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2083619453] [2022-11-23 16:03:13,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 16:03:13,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:03:13,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:03:13,489 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:03:13,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b219a5de-4be0-47e9-bb35-9b613cbcdf72/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-23 16:03:13,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 16:03:13,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:03:13,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-23 16:03:13,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:03:15,531 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 161 proven. 155 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2022-11-23 16:03:15,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:03:32,521 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse3 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (.cse2 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse1 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse0 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|))) (let ((.cse4 (* 2 .cse0)) (.cse5 (* 2 .cse1)) (.cse6 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse7 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse8 (* 2 .cse2)) (.cse9 (* 2 .cse3)) (.cse13 (* |c_ULTIMATE.start_main_~yy~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse12 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse10 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse11 (* |c_ULTIMATE.start_main_~yy~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|))) (or (not (= (+ .cse0 .cse1) (+ |c_ULTIMATE.start_main_~c~0#1| .cse2 .cse3))) (<= (+ |c_ULTIMATE.start_main_~c~0#1| .cse4 .cse5) (+ .cse6 .cse7 .cse8 .cse9)) (= (+ (* .cse10 2) (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* 2 .cse11) (* |c_ULTIMATE.start_main_~yy~0#1| |c_ULTIMATE.start_main_~s~0#1|) (* (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|) 2) (* (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|) 2)) (+ (* 2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (* 2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (* 2 .cse12) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* 2 .cse13))) (not (= (+ |c_ULTIMATE.start_main_~b~0#1| .cse4 .cse5) (+ (* |c_ULTIMATE.start_main_~c~0#1| 2) .cse6 .cse7 .cse8 .cse9))) (not (= (+ |c_ULTIMATE.start_main_~c~0#1| .cse13 .cse12 .cse2 .cse3) (+ .cse10 (* |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~y~0#1|) .cse0 .cse11 .cse1)))))) is different from true [2022-11-23 16:04:06,921 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse9 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (.cse8 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse7 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse6 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|))) (let ((.cse12 (* 2 .cse6)) (.cse13 (* 2 .cse7)) (.cse10 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse11 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse14 (* 2 .cse8)) (.cse15 (* 2 .cse9))) (or (forall ((|ULTIMATE.start_main_~yy~0#1| Int)) (let ((.cse0 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse3 (* |ULTIMATE.start_main_~yy~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (.cse5 (* |ULTIMATE.start_main_~yy~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse4 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse1 (* |ULTIMATE.start_main_~yy~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse2 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~q~0#1|))) (or (= (+ (* .cse0 2) .cse1 .cse2 (* (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|) 2) (* (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|) 2) (* .cse3 2)) (+ (* 2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (* 2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (* 2 .cse4) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|) (* 2 .cse5) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|))) (not (= (+ .cse0 .cse3 (* |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~y~0#1|) .cse6 .cse7) (+ |c_ULTIMATE.start_main_~c~0#1| .cse5 .cse4 .cse8 .cse9))) (not (= (+ .cse1 .cse2 |c_ULTIMATE.start_main_~b~0#1|) (+ .cse10 .cse11 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~b~0#1|))))))) (not (= (+ .cse6 .cse7) (+ |c_ULTIMATE.start_main_~c~0#1| .cse8 .cse9))) (<= (+ |c_ULTIMATE.start_main_~c~0#1| .cse12 .cse13) (+ .cse10 .cse11 .cse14 .cse15)) (<= |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~c~0#1|) (not (= (+ |c_ULTIMATE.start_main_~b~0#1| .cse12 .cse13) (+ (* |c_ULTIMATE.start_main_~c~0#1| 2) .cse10 .cse11 .cse14 .cse15)))))) is different from true [2022-11-23 16:04:06,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:04:06,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057999041] [2022-11-23 16:04:06,923 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 16:04:06,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083619453] [2022-11-23 16:04:06,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083619453] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:04:06,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [206039845] [2022-11-23 16:04:06,924 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-23 16:04:06,925 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:04:06,925 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:04:06,925 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:04:06,925 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:04:09,702 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2022-11-23 16:04:09,735 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-23 16:04:09,746 INFO L180 IcfgInterpreter]: Interpretation finished