./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--message--fusion--mptctl.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--message--fusion--mptctl.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8 --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 64bit --witnessprinter.graph.data.programhash 1cfba800a850f13ff72fddf9946e31aec208a19aa4b82d402046e12670b66199 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:25:26,089 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:25:26,092 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:25:26,147 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:25:26,148 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:25:26,152 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:25:26,154 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:25:26,158 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:25:26,160 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:25:26,169 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:25:26,171 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:25:26,173 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:25:26,173 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:25:26,176 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:25:26,178 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:25:26,187 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:25:26,189 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:25:26,190 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:25:26,192 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:25:26,199 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:25:26,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:25:26,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:25:26,206 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:25:26,207 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:25:26,218 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:25:26,219 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:25:26,219 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:25:26,221 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:25:26,222 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:25:26,223 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:25:26,224 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:25:26,225 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:25:26,227 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:25:26,228 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:25:26,229 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:25:26,229 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:25:26,230 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:25:26,230 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:25:26,231 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:25:26,231 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:25:26,232 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:25:26,233 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 01:25:26,272 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:25:26,272 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:25:26,274 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:25:26,274 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:25:26,274 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:25:26,274 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:25:26,275 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:25:26,275 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:25:26,275 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:25:26,275 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:25:26,282 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:25:26,282 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:25:26,283 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:25:26,283 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:25:26,283 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:25:26,284 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:25:26,284 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:25:26,284 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:25:26,285 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:25:26,285 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:25:26,285 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:25:26,285 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:25:26,286 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:25:26,286 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:25:26,286 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:25:26,286 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:25:26,287 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:25:26,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:25:26,287 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:25:26,289 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:25:26,289 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:25:26,289 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:25:26,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:25:26,290 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:25:26,290 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:25:26,290 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:25:26,291 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1cfba800a850f13ff72fddf9946e31aec208a19aa4b82d402046e12670b66199 [2021-11-07 01:25:26,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:25:26,587 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:25:26,589 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:25:26,590 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:25:26,591 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:25:26,592 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--message--fusion--mptctl.ko-entry_point.cil.out.i [2021-11-07 01:25:26,679 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/data/95194e653/be9486af697a4d689fa0b1e30051abf2/FLAG54df4bbdc [2021-11-07 01:25:27,768 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:25:27,769 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--message--fusion--mptctl.ko-entry_point.cil.out.i [2021-11-07 01:25:27,820 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/data/95194e653/be9486af697a4d689fa0b1e30051abf2/FLAG54df4bbdc [2021-11-07 01:25:27,835 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/data/95194e653/be9486af697a4d689fa0b1e30051abf2 [2021-11-07 01:25:27,837 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:25:27,838 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:25:27,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:25:27,840 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:25:27,843 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:25:27,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:25:27" (1/1) ... [2021-11-07 01:25:27,846 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@573cf202 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:27, skipping insertion in model container [2021-11-07 01:25:27,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:25:27" (1/1) ... [2021-11-07 01:25:27,856 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:25:28,016 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:25:29,293 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:25:29,644 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:25:29,646 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:25:30,046 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--message--fusion--mptctl.ko-entry_point.cil.out.i[277952,277965] [2021-11-07 01:25:30,314 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:25:30,340 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:25:30,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@22b1dc6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:30, skipping insertion in model container [2021-11-07 01:25:30,341 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:25:30,342 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:25:30,344 INFO L168 Benchmark]: Toolchain (without parser) took 2504.23 ms. Allocated memory was 121.6 MB in the beginning and 186.6 MB in the end (delta: 65.0 MB). Free memory was 74.8 MB in the beginning and 104.2 MB in the end (delta: -29.4 MB). Peak memory consumption was 49.8 MB. Max. memory is 16.1 GB. [2021-11-07 01:25:30,345 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 83.9 MB. Free memory was 39.1 MB in the beginning and 39.1 MB in the end (delta: 53.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:25:30,346 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2501.64 ms. Allocated memory was 121.6 MB in the beginning and 186.6 MB in the end (delta: 65.0 MB). Free memory was 74.8 MB in the beginning and 104.2 MB in the end (delta: -29.4 MB). Peak memory consumption was 49.8 MB. Max. memory is 16.1 GB. [2021-11-07 01:25:30,348 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 83.9 MB. Free memory was 39.1 MB in the beginning and 39.1 MB in the end (delta: 53.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 2501.64 ms. Allocated memory was 121.6 MB in the beginning and 186.6 MB in the end (delta: 65.0 MB). Free memory was 74.8 MB in the beginning and 104.2 MB in the end (delta: -29.4 MB). Peak memory consumption was 49.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 5642]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--message--fusion--mptctl.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8 --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 64bit --witnessprinter.graph.data.programhash 1cfba800a850f13ff72fddf9946e31aec208a19aa4b82d402046e12670b66199 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:25:32,599 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:25:32,602 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:25:32,657 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:25:32,658 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:25:32,662 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:25:32,663 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:25:32,667 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:25:32,671 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:25:32,682 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:25:32,684 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:25:32,686 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:25:32,686 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:25:32,687 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:25:32,689 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:25:32,690 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:25:32,691 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:25:32,692 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:25:32,694 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:25:32,696 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:25:32,698 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:25:32,702 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:25:32,704 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:25:32,705 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:25:32,710 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:25:32,714 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:25:32,714 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:25:32,716 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:25:32,717 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:25:32,718 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:25:32,719 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:25:32,719 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:25:32,721 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:25:32,722 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:25:32,724 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:25:32,724 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:25:32,725 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:25:32,725 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:25:32,742 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:25:32,744 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:25:32,744 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:25:32,745 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 01:25:32,790 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:25:32,791 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:25:32,792 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:25:32,792 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:25:32,792 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:25:32,793 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:25:32,793 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:25:32,793 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:25:32,793 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:25:32,795 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:25:32,796 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:25:32,796 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:25:32,796 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:25:32,796 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:25:32,796 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:25:32,797 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:25:32,797 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:25:32,797 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:25:32,797 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:25:32,798 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:25:32,798 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:25:32,798 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:25:32,798 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:25:32,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:25:32,799 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:25:32,799 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:25:32,799 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:25:32,799 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:25:32,800 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:25:32,800 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:25:32,800 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:25:32,800 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:25:32,800 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1cfba800a850f13ff72fddf9946e31aec208a19aa4b82d402046e12670b66199 [2021-11-07 01:25:33,149 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:25:33,173 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:25:33,177 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:25:33,178 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:25:33,179 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:25:33,180 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--message--fusion--mptctl.ko-entry_point.cil.out.i [2021-11-07 01:25:33,254 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/data/51f2d018e/8a2d155cf02c49c3ade198b7859a3bdb/FLAG7d2c7b03d [2021-11-07 01:25:34,301 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:25:34,302 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--message--fusion--mptctl.ko-entry_point.cil.out.i [2021-11-07 01:25:34,351 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/data/51f2d018e/8a2d155cf02c49c3ade198b7859a3bdb/FLAG7d2c7b03d [2021-11-07 01:25:34,675 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/data/51f2d018e/8a2d155cf02c49c3ade198b7859a3bdb [2021-11-07 01:25:34,677 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:25:34,678 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:25:34,680 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:25:34,680 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:25:34,696 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:25:34,697 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:25:34" (1/1) ... [2021-11-07 01:25:34,698 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fb858dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:34, skipping insertion in model container [2021-11-07 01:25:34,698 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:25:34" (1/1) ... [2021-11-07 01:25:34,705 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:25:34,869 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:25:37,011 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--message--fusion--mptctl.ko-entry_point.cil.out.i[277952,277965] [2021-11-07 01:25:37,248 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:25:37,287 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:25:37,338 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:25:37,770 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--message--fusion--mptctl.ko-entry_point.cil.out.i[277952,277965] [2021-11-07 01:25:37,802 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:25:37,812 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:25:38,276 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--message--fusion--mptctl.ko-entry_point.cil.out.i[277952,277965] [2021-11-07 01:25:38,297 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:25:38,414 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:25:38,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:38 WrapperNode [2021-11-07 01:25:38,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:25:38,416 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:25:38,416 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:25:38,416 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:25:38,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:38" (1/1) ... [2021-11-07 01:25:38,574 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:38" (1/1) ... [2021-11-07 01:25:39,127 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:25:39,128 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:25:39,129 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:25:39,129 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:25:39,236 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:38" (1/1) ... [2021-11-07 01:25:39,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:38" (1/1) ... [2021-11-07 01:25:39,415 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:38" (1/1) ... [2021-11-07 01:25:39,416 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:38" (1/1) ... [2021-11-07 01:25:40,014 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:38" (1/1) ... [2021-11-07 01:25:40,150 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:38" (1/1) ... [2021-11-07 01:25:40,228 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:38" (1/1) ... [2021-11-07 01:25:40,322 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:25:40,324 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:25:40,324 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:25:40,324 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:25:40,325 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:38" (1/1) ... [2021-11-07 01:25:40,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:25:40,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:25:40,362 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:25:40,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:25:40,410 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 01:25:40,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 01:25:40,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:25:40,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-07 01:25:40,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:25:40,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:25:40,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 01:25:40,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 01:25:40,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-07 01:25:40,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:25:40,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:25:40,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 01:25:40,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-07 01:25:40,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:25:40,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 01:25:40,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-07 01:25:40,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:25:40,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:25:40,413 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-11-07 01:25:40,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:25:40,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:28:30,450 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:28:30,451 INFO L299 CfgBuilder]: Removed 4216 assume(true) statements. [2021-11-07 01:28:30,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:28:30 BoogieIcfgContainer [2021-11-07 01:28:30,459 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:28:30,461 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:28:30,461 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:28:30,465 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:28:30,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:25:34" (1/3) ... [2021-11-07 01:28:30,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78869ab3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:28:30, skipping insertion in model container [2021-11-07 01:28:30,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:38" (2/3) ... [2021-11-07 01:28:30,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78869ab3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:28:30, skipping insertion in model container [2021-11-07 01:28:30,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:28:30" (3/3) ... [2021-11-07 01:28:30,468 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--message--fusion--mptctl.ko-entry_point.cil.out.i [2021-11-07 01:28:30,475 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:28:30,475 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 115 error locations. [2021-11-07 01:28:30,554 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:28:30,561 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:28:30,562 INFO L340 AbstractCegarLoop]: Starting to check reachability of 115 error locations. [2021-11-07 01:28:30,666 INFO L276 IsEmpty]: Start isEmpty. Operand has 5031 states, 4915 states have (on average 1.442319430315361) internal successors, (7089), 5030 states have internal predecessors, (7089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:30,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 01:28:30,675 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:28:30,675 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:28:30,676 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-07 01:28:30,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:28:30,683 INFO L85 PathProgramCache]: Analyzing trace with hash -2040343940, now seen corresponding path program 1 times [2021-11-07 01:28:30,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:28:30,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [295082450] [2021-11-07 01:28:30,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:30,710 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:28:30,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:28:30,714 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:28:30,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:28:35,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:35,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 1308 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:28:35,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:36,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:28:36,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:36,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:28:36,497 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:28:36,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [295082450] [2021-11-07 01:28:36,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [295082450] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:28:36,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:28:36,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:28:36,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151308191] [2021-11-07 01:28:36,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:28:36,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:28:36,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:28:36,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:28:36,549 INFO L87 Difference]: Start difference. First operand has 5031 states, 4915 states have (on average 1.442319430315361) internal successors, (7089), 5030 states have internal predecessors, (7089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:36,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:28:36,789 INFO L93 Difference]: Finished difference Result 10058 states and 14173 transitions. [2021-11-07 01:28:36,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:28:36,791 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-07 01:28:36,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:28:36,851 INFO L225 Difference]: With dead ends: 10058 [2021-11-07 01:28:36,852 INFO L226 Difference]: Without dead ends: 5008 [2021-11-07 01:28:36,869 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:28:36,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5008 states. [2021-11-07 01:28:37,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5008 to 5008. [2021-11-07 01:28:37,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5008 states, 4893 states have (on average 1.3850398528510117) internal successors, (6777), 5007 states have internal predecessors, (6777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:37,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5008 states to 5008 states and 6777 transitions. [2021-11-07 01:28:37,146 INFO L78 Accepts]: Start accepts. Automaton has 5008 states and 6777 transitions. Word has length 40 [2021-11-07 01:28:37,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:28:37,146 INFO L470 AbstractCegarLoop]: Abstraction has 5008 states and 6777 transitions. [2021-11-07 01:28:37,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:37,148 INFO L276 IsEmpty]: Start isEmpty. Operand 5008 states and 6777 transitions. [2021-11-07 01:28:37,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 01:28:37,150 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:28:37,151 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:28:37,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:28:37,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:28:37,378 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-07 01:28:37,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:28:37,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1380812418, now seen corresponding path program 1 times [2021-11-07 01:28:37,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:28:37,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1644618412] [2021-11-07 01:28:37,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:37,384 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:28:37,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:28:37,386 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:28:37,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:28:42,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:42,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 1308 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:28:42,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:42,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:28:42,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:43,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:28:43,287 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:28:43,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1644618412] [2021-11-07 01:28:43,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1644618412] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:28:43,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:28:43,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:28:43,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266391550] [2021-11-07 01:28:43,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:28:43,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:28:43,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:28:43,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:28:43,293 INFO L87 Difference]: Start difference. First operand 5008 states and 6777 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:46,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:28:46,260 INFO L93 Difference]: Finished difference Result 10045 states and 13619 transitions. [2021-11-07 01:28:46,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:28:46,262 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-07 01:28:46,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:28:46,310 INFO L225 Difference]: With dead ends: 10045 [2021-11-07 01:28:46,310 INFO L226 Difference]: Without dead ends: 5045 [2021-11-07 01:28:46,325 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:28:46,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5045 states. [2021-11-07 01:28:46,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5045 to 5045. [2021-11-07 01:28:46,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5045 states, 4930 states have (on average 1.3821501014198783) internal successors, (6814), 5044 states have internal predecessors, (6814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:46,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5045 states to 5045 states and 6814 transitions. [2021-11-07 01:28:46,496 INFO L78 Accepts]: Start accepts. Automaton has 5045 states and 6814 transitions. Word has length 40 [2021-11-07 01:28:46,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:28:46,497 INFO L470 AbstractCegarLoop]: Abstraction has 5045 states and 6814 transitions. [2021-11-07 01:28:46,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:46,498 INFO L276 IsEmpty]: Start isEmpty. Operand 5045 states and 6814 transitions. [2021-11-07 01:28:46,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:28:46,508 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:28:46,508 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:28:46,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:28:46,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:28:46,730 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-07 01:28:46,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:28:46,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1929726503, now seen corresponding path program 1 times [2021-11-07 01:28:46,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:28:46,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1838918743] [2021-11-07 01:28:46,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:46,735 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:28:46,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:28:46,737 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:28:46,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:28:51,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:51,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 1363 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:28:51,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:52,188 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:28:52,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:52,980 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:28:52,980 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:28:52,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1838918743] [2021-11-07 01:28:52,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1838918743] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:28:52,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [748745439] [2021-11-07 01:28:52,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:52,981 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:28:52,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:28:52,991 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:28:53,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-07 01:28:54,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:54,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 1363 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:28:54,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:55,274 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 01:28:55,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:55,447 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 01:28:55,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [748745439] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:28:55,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:28:55,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:28:55,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036728081] [2021-11-07 01:28:55,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:28:55,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:28:55,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:28:55,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:28:55,450 INFO L87 Difference]: Start difference. First operand 5045 states and 6814 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:56,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:28:56,182 INFO L93 Difference]: Finished difference Result 10108 states and 13655 transitions. [2021-11-07 01:28:56,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:28:56,184 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-07 01:28:56,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:28:56,218 INFO L225 Difference]: With dead ends: 10108 [2021-11-07 01:28:56,218 INFO L226 Difference]: Without dead ends: 5105 [2021-11-07 01:28:56,227 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:28:56,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5105 states. [2021-11-07 01:28:56,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5105 to 5087. [2021-11-07 01:28:56,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5087 states, 4972 states have (on average 1.3823411102172165) internal successors, (6873), 5086 states have internal predecessors, (6873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:56,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5087 states to 5087 states and 6873 transitions. [2021-11-07 01:28:56,403 INFO L78 Accepts]: Start accepts. Automaton has 5087 states and 6873 transitions. Word has length 51 [2021-11-07 01:28:56,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:28:56,404 INFO L470 AbstractCegarLoop]: Abstraction has 5087 states and 6873 transitions. [2021-11-07 01:28:56,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:56,405 INFO L276 IsEmpty]: Start isEmpty. Operand 5087 states and 6873 transitions. [2021-11-07 01:28:56,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:28:56,410 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:28:56,410 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:28:56,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:28:56,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:28:56,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:28:56,828 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr110ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-07 01:28:56,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:28:56,829 INFO L85 PathProgramCache]: Analyzing trace with hash -507347168, now seen corresponding path program 1 times [2021-11-07 01:28:56,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:28:56,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1412215472] [2021-11-07 01:28:56,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:56,832 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:28:56,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:28:56,833 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:28:56,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:29:01,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:01,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 1367 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:29:01,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:02,212 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:29:02,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:03,041 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:29:03,041 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:03,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1412215472] [2021-11-07 01:29:03,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1412215472] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:29:03,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1350700838] [2021-11-07 01:29:03,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:03,042 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:29:03,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:29:03,044 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:29:03,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-07 01:29:05,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:05,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 1367 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:29:05,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:05,951 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 01:29:05,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:06,653 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 01:29:06,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1350700838] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:06,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:29:06,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:29:06,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932877298] [2021-11-07 01:29:06,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:29:06,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:06,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:29:06,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:29:06,656 INFO L87 Difference]: Start difference. First operand 5087 states and 6873 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:06,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:06,788 INFO L93 Difference]: Finished difference Result 5087 states and 6873 transitions. [2021-11-07 01:29:06,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:29:06,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 01:29:06,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:06,820 INFO L225 Difference]: With dead ends: 5087 [2021-11-07 01:29:06,820 INFO L226 Difference]: Without dead ends: 5085 [2021-11-07 01:29:06,823 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:29:06,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5085 states. [2021-11-07 01:29:06,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5085 to 5085. [2021-11-07 01:29:07,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5085 states, 4971 states have (on average 1.3822168577750955) internal successors, (6871), 5084 states have internal predecessors, (6871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:07,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5085 states to 5085 states and 6871 transitions. [2021-11-07 01:29:07,025 INFO L78 Accepts]: Start accepts. Automaton has 5085 states and 6871 transitions. Word has length 57 [2021-11-07 01:29:07,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:07,027 INFO L470 AbstractCegarLoop]: Abstraction has 5085 states and 6871 transitions. [2021-11-07 01:29:07,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:07,028 INFO L276 IsEmpty]: Start isEmpty. Operand 5085 states and 6871 transitions. [2021-11-07 01:29:07,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:29:07,030 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:07,031 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:29:07,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:07,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:07,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:29:07,438 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr111ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-07 01:29:07,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:07,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1452129814, now seen corresponding path program 1 times [2021-11-07 01:29:07,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:07,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [685636040] [2021-11-07 01:29:07,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:07,442 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:07,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:07,443 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:07,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:29:12,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:12,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 1368 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:29:12,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:29:12,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:13,741 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:29:13,741 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:13,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [685636040] [2021-11-07 01:29:13,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [685636040] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:29:13,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1171073407] [2021-11-07 01:29:13,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:13,742 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:29:13,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:29:13,743 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:29:13,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-07 01:29:15,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:15,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 1368 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:29:15,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:16,695 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 01:29:16,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:17,462 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 01:29:17,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1171073407] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:17,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:29:17,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:29:17,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148202353] [2021-11-07 01:29:17,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:29:17,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:17,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:29:17,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:29:17,464 INFO L87 Difference]: Start difference. First operand 5085 states and 6871 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:17,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:17,619 INFO L93 Difference]: Finished difference Result 5085 states and 6871 transitions. [2021-11-07 01:29:17,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:29:17,621 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 01:29:17,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:17,655 INFO L225 Difference]: With dead ends: 5085 [2021-11-07 01:29:17,655 INFO L226 Difference]: Without dead ends: 5083 [2021-11-07 01:29:17,658 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:29:17,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5083 states. [2021-11-07 01:29:17,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5083 to 5083. [2021-11-07 01:29:17,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5083 states, 4970 states have (on average 1.382092555331992) internal successors, (6869), 5082 states have internal predecessors, (6869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:17,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5083 states to 5083 states and 6869 transitions. [2021-11-07 01:29:17,863 INFO L78 Accepts]: Start accepts. Automaton has 5083 states and 6869 transitions. Word has length 58 [2021-11-07 01:29:17,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:17,869 INFO L470 AbstractCegarLoop]: Abstraction has 5083 states and 6869 transitions. [2021-11-07 01:29:17,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:17,870 INFO L276 IsEmpty]: Start isEmpty. Operand 5083 states and 6869 transitions. [2021-11-07 01:29:17,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 01:29:17,871 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:17,872 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:29:17,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:18,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:18,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:29:18,287 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr112ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-07 01:29:18,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:18,287 INFO L85 PathProgramCache]: Analyzing trace with hash 2066374122, now seen corresponding path program 1 times [2021-11-07 01:29:18,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:18,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [553307223] [2021-11-07 01:29:18,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:18,290 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:18,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:18,292 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:18,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:29:22,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:23,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 1369 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:29:23,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:23,563 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:29:23,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:24,319 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:29:24,319 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:24,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [553307223] [2021-11-07 01:29:24,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [553307223] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:29:24,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [551599668] [2021-11-07 01:29:24,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:24,320 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:29:24,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:29:24,323 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:29:24,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-07 01:29:26,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:26,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 1369 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:29:26,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:27,300 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 01:29:27,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:27,965 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 01:29:27,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [551599668] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:27,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:29:27,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:29:27,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990380030] [2021-11-07 01:29:27,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:29:27,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:27,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:29:27,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:29:27,968 INFO L87 Difference]: Start difference. First operand 5083 states and 6869 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:28,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:28,190 INFO L93 Difference]: Finished difference Result 5083 states and 6869 transitions. [2021-11-07 01:29:28,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:29:28,192 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-07 01:29:28,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:28,227 INFO L225 Difference]: With dead ends: 5083 [2021-11-07 01:29:28,227 INFO L226 Difference]: Without dead ends: 5073 [2021-11-07 01:29:28,230 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:29:28,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5073 states. [2021-11-07 01:29:28,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5073 to 5073. [2021-11-07 01:29:28,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5073 states, 4965 states have (on average 1.3814702920443103) internal successors, (6859), 5072 states have internal predecessors, (6859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:28,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5073 states to 5073 states and 6859 transitions. [2021-11-07 01:29:28,431 INFO L78 Accepts]: Start accepts. Automaton has 5073 states and 6859 transitions. Word has length 59 [2021-11-07 01:29:28,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:28,431 INFO L470 AbstractCegarLoop]: Abstraction has 5073 states and 6859 transitions. [2021-11-07 01:29:28,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:28,431 INFO L276 IsEmpty]: Start isEmpty. Operand 5073 states and 6859 transitions. [2021-11-07 01:29:28,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:29:28,432 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:28,432 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:29:28,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2021-11-07 01:29:28,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:28,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:28,846 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr113ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-07 01:29:28,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:28,847 INFO L85 PathProgramCache]: Analyzing trace with hash -366888800, now seen corresponding path program 1 times [2021-11-07 01:29:28,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:28,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2064029752] [2021-11-07 01:29:28,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:28,849 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:28,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:28,850 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:28,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:29:33,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:33,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 1370 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:29:33,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:34,187 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:29:34,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:34,975 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:29:34,975 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:34,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2064029752] [2021-11-07 01:29:34,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2064029752] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:29:34,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1142788793] [2021-11-07 01:29:34,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:34,975 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:29:34,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:29:34,976 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:29:34,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-07 01:29:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:37,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 1370 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:29:37,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:38,233 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 01:29:38,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:38,911 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 01:29:38,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1142788793] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:38,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:29:38,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:29:38,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917899965] [2021-11-07 01:29:38,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:29:38,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:38,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:29:38,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:29:38,913 INFO L87 Difference]: Start difference. First operand 5073 states and 6859 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:40,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:40,648 INFO L93 Difference]: Finished difference Result 13098 states and 17806 transitions. [2021-11-07 01:29:40,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:29:40,649 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 01:29:40,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:40,677 INFO L225 Difference]: With dead ends: 13098 [2021-11-07 01:29:40,677 INFO L226 Difference]: Without dead ends: 8067 [2021-11-07 01:29:40,687 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:29:40,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8067 states. [2021-11-07 01:29:40,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8067 to 8033. [2021-11-07 01:29:40,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8033 states, 7925 states have (on average 1.3793059936908518) internal successors, (10931), 8032 states have internal predecessors, (10931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:40,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8033 states to 8033 states and 10931 transitions. [2021-11-07 01:29:40,999 INFO L78 Accepts]: Start accepts. Automaton has 8033 states and 10931 transitions. Word has length 60 [2021-11-07 01:29:41,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:41,001 INFO L470 AbstractCegarLoop]: Abstraction has 8033 states and 10931 transitions. [2021-11-07 01:29:41,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:41,001 INFO L276 IsEmpty]: Start isEmpty. Operand 8033 states and 10931 transitions. [2021-11-07 01:29:41,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 01:29:41,002 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:41,002 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:29:41,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:41,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:41,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:29:41,426 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr114ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-07 01:29:41,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:41,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1511371956, now seen corresponding path program 1 times [2021-11-07 01:29:41,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:41,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [385709713] [2021-11-07 01:29:41,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:41,430 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:41,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:41,431 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:41,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:29:46,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:46,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 1371 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:29:46,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:47,012 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:29:47,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:47,862 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:29:47,862 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:47,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [385709713] [2021-11-07 01:29:47,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [385709713] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:29:47,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1071640672] [2021-11-07 01:29:47,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:47,863 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:29:47,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:29:47,864 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:29:47,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-07 01:29:50,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:50,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 1371 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:29:50,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:51,134 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 01:29:51,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:51,818 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 01:29:51,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1071640672] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:51,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:29:51,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:29:51,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364845586] [2021-11-07 01:29:51,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:29:51,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:51,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:29:51,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:29:51,821 INFO L87 Difference]: Start difference. First operand 8033 states and 10931 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:52,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:52,030 INFO L93 Difference]: Finished difference Result 8033 states and 10931 transitions. [2021-11-07 01:29:52,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:29:52,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-07 01:29:52,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:52,054 INFO L225 Difference]: With dead ends: 8033 [2021-11-07 01:29:52,054 INFO L226 Difference]: Without dead ends: 8019 [2021-11-07 01:29:52,058 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:29:52,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8019 states. [2021-11-07 01:29:52,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8019 to 8019. [2021-11-07 01:29:52,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8019 states, 7912 states have (on average 1.3792972699696664) internal successors, (10913), 8018 states have internal predecessors, (10913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:52,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8019 states to 8019 states and 10913 transitions. [2021-11-07 01:29:52,402 INFO L78 Accepts]: Start accepts. Automaton has 8019 states and 10913 transitions. Word has length 61 [2021-11-07 01:29:52,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:52,403 INFO L470 AbstractCegarLoop]: Abstraction has 8019 states and 10913 transitions. [2021-11-07 01:29:52,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:52,403 INFO L276 IsEmpty]: Start isEmpty. Operand 8019 states and 10913 transitions. [2021-11-07 01:29:52,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 01:29:52,404 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:52,405 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:29:52,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:52,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:52,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:52,822 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr69ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-07 01:29:52,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:52,823 INFO L85 PathProgramCache]: Analyzing trace with hash -691344395, now seen corresponding path program 1 times [2021-11-07 01:29:52,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:52,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1040766825] [2021-11-07 01:29:52,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:52,826 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:52,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:52,827 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:52,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:29:58,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:58,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 1488 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:29:58,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:59,059 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 01:29:59,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:59,998 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 01:29:59,998 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:59,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1040766825] [2021-11-07 01:29:59,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1040766825] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:29:59,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1362013927] [2021-11-07 01:29:59,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:59,999 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:29:59,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:29:59,999 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:30:00,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:30:02,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:02,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 1488 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:30:02,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:02,873 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 01:30:02,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:03,099 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 01:30:03,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1362013927] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:03,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:30:03,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:30:03,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454861693] [2021-11-07 01:30:03,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:30:03,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:03,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:30:03,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:30:03,101 INFO L87 Difference]: Start difference. First operand 8019 states and 10913 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:05,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:05,714 INFO L93 Difference]: Finished difference Result 16006 states and 21787 transitions. [2021-11-07 01:30:05,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:30:05,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-07 01:30:05,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:05,737 INFO L225 Difference]: With dead ends: 16006 [2021-11-07 01:30:05,737 INFO L226 Difference]: Without dead ends: 8027 [2021-11-07 01:30:05,752 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:30:05,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8027 states. [2021-11-07 01:30:06,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8027 to 8020. [2021-11-07 01:30:06,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8020 states, 7913 states have (on average 1.3789965878933401) internal successors, (10912), 8019 states have internal predecessors, (10912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:06,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8020 states to 8020 states and 10912 transitions. [2021-11-07 01:30:06,197 INFO L78 Accepts]: Start accepts. Automaton has 8020 states and 10912 transitions. Word has length 83 [2021-11-07 01:30:06,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:06,198 INFO L470 AbstractCegarLoop]: Abstraction has 8020 states and 10912 transitions. [2021-11-07 01:30:06,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:06,199 INFO L276 IsEmpty]: Start isEmpty. Operand 8020 states and 10912 transitions. [2021-11-07 01:30:06,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 01:30:06,207 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:06,208 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:06,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:06,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:06,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:06,628 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr69ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-07 01:30:06,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:06,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1004596261, now seen corresponding path program 1 times [2021-11-07 01:30:06,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:06,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1023612524] [2021-11-07 01:30:06,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:06,633 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:06,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:06,634 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:06,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:30:11,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:12,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 1497 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:30:12,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:12,866 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 01:30:12,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 01:30:13,776 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:13,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1023612524] [2021-11-07 01:30:13,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1023612524] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:30:13,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1442022987] [2021-11-07 01:30:13,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:13,778 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:30:13,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:30:13,779 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:30:13,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 01:30:16,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:16,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 1497 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:30:16,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:16,759 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 01:30:16,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:16,970 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 01:30:16,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1442022987] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:16,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:30:16,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:30:16,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706323667] [2021-11-07 01:30:16,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:30:16,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:16,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:30:16,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:30:16,972 INFO L87 Difference]: Start difference. First operand 8020 states and 10912 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:19,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:19,513 INFO L93 Difference]: Finished difference Result 8020 states and 10912 transitions. [2021-11-07 01:30:19,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:30:19,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-07 01:30:19,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:19,534 INFO L225 Difference]: With dead ends: 8020 [2021-11-07 01:30:19,534 INFO L226 Difference]: Without dead ends: 8012 [2021-11-07 01:30:19,538 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:30:19,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8012 states. [2021-11-07 01:30:19,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8012 to 8012. [2021-11-07 01:30:19,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8012 states, 7909 states have (on average 1.3781767606524213) internal successors, (10900), 8011 states have internal predecessors, (10900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:19,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8012 states to 8012 states and 10900 transitions. [2021-11-07 01:30:19,962 INFO L78 Accepts]: Start accepts. Automaton has 8012 states and 10900 transitions. Word has length 85 [2021-11-07 01:30:19,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:19,963 INFO L470 AbstractCegarLoop]: Abstraction has 8012 states and 10900 transitions. [2021-11-07 01:30:19,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:19,963 INFO L276 IsEmpty]: Start isEmpty. Operand 8012 states and 10900 transitions. [2021-11-07 01:30:19,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-07 01:30:19,966 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:19,967 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:20,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:20,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:20,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:30:20,388 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr108ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-07 01:30:20,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:20,388 INFO L85 PathProgramCache]: Analyzing trace with hash -96796412, now seen corresponding path program 1 times [2021-11-07 01:30:20,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:20,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [261956514] [2021-11-07 01:30:20,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:20,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:20,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:20,395 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:20,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:30:26,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:26,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 1604 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:30:26,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:27,312 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 01:30:27,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:28,513 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 01:30:28,513 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:28,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [261956514] [2021-11-07 01:30:28,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [261956514] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:30:28,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1799421577] [2021-11-07 01:30:28,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:28,514 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:30:28,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:30:28,514 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:30:28,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 01:30:31,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:31,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 1604 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:30:31,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:31,831 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 01:30:31,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:32,233 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 01:30:32,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1799421577] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:32,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:30:32,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:30:32,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313264765] [2021-11-07 01:30:32,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:30:32,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:32,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:30:32,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:30:32,235 INFO L87 Difference]: Start difference. First operand 8012 states and 10900 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:32,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:32,509 INFO L93 Difference]: Finished difference Result 15986 states and 21758 transitions. [2021-11-07 01:30:32,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:30:32,510 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-11-07 01:30:32,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:32,528 INFO L225 Difference]: With dead ends: 15986 [2021-11-07 01:30:32,529 INFO L226 Difference]: Without dead ends: 8016 [2021-11-07 01:30:32,542 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:30:32,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8016 states. [2021-11-07 01:30:32,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8016 to 8016. [2021-11-07 01:30:32,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8016 states, 7913 states have (on average 1.3779855933274359) internal successors, (10904), 8015 states have internal predecessors, (10904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:32,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8016 states to 8016 states and 10904 transitions. [2021-11-07 01:30:32,932 INFO L78 Accepts]: Start accepts. Automaton has 8016 states and 10904 transitions. Word has length 120 [2021-11-07 01:30:32,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:32,932 INFO L470 AbstractCegarLoop]: Abstraction has 8016 states and 10904 transitions. [2021-11-07 01:30:32,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:32,933 INFO L276 IsEmpty]: Start isEmpty. Operand 8016 states and 10904 transitions. [2021-11-07 01:30:32,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-07 01:30:32,936 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:32,936 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:32,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:33,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:33,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:33,355 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr108ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-07 01:30:33,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:33,356 INFO L85 PathProgramCache]: Analyzing trace with hash -74164158, now seen corresponding path program 1 times [2021-11-07 01:30:33,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:33,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [52172374] [2021-11-07 01:30:33,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:33,359 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:33,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:33,361 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:33,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:30:38,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:38,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 1607 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:30:38,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:39,812 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 01:30:39,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:41,122 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 01:30:41,122 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:41,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [52172374] [2021-11-07 01:30:41,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [52172374] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:30:41,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1111330890] [2021-11-07 01:30:41,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:41,123 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:30:41,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:30:41,124 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:30:41,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 01:30:43,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:43,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 1607 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:30:43,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:44,631 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 01:30:44,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:45,369 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 01:30:45,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1111330890] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:45,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:30:45,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-07 01:30:45,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160321496] [2021-11-07 01:30:45,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:30:45,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:45,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:30:45,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:30:45,371 INFO L87 Difference]: Start difference. First operand 8016 states and 10904 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:48,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:48,506 INFO L93 Difference]: Finished difference Result 16183 states and 22060 transitions. [2021-11-07 01:30:48,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:30:48,507 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-11-07 01:30:48,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:48,526 INFO L225 Difference]: With dead ends: 16183 [2021-11-07 01:30:48,526 INFO L226 Difference]: Without dead ends: 8209 [2021-11-07 01:30:48,539 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:30:48,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8209 states. [2021-11-07 01:30:48,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8209 to 8192. [2021-11-07 01:30:48,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8192 states, 8089 states have (on average 1.3801458771170725) internal successors, (11164), 8191 states have internal predecessors, (11164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:48,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8192 states to 8192 states and 11164 transitions. [2021-11-07 01:30:48,886 INFO L78 Accepts]: Start accepts. Automaton has 8192 states and 11164 transitions. Word has length 120 [2021-11-07 01:30:48,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:48,886 INFO L470 AbstractCegarLoop]: Abstraction has 8192 states and 11164 transitions. [2021-11-07 01:30:48,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:48,887 INFO L276 IsEmpty]: Start isEmpty. Operand 8192 states and 11164 transitions. [2021-11-07 01:30:48,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-07 01:30:48,891 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:48,891 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:48,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-07 01:30:49,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:49,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:30:49,306 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr108ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-07 01:30:49,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:49,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1986467979, now seen corresponding path program 1 times [2021-11-07 01:30:49,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:49,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [800093705] [2021-11-07 01:30:49,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:49,310 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:49,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:49,310 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:49,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 01:30:55,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:55,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 1631 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:30:55,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:56,369 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 01:30:56,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:57,772 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 01:30:57,772 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:57,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [800093705] [2021-11-07 01:30:57,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [800093705] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:30:57,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1879529235] [2021-11-07 01:30:57,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:57,773 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:30:57,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:30:57,779 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:30:57,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-07 01:31:01,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:01,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 1631 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:31:01,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:02,104 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 01:31:02,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:02,903 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 01:31:02,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1879529235] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:02,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:31:02,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-07 01:31:02,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699747644] [2021-11-07 01:31:02,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:31:02,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:02,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:31:02,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:31:02,906 INFO L87 Difference]: Start difference. First operand 8192 states and 11164 transitions. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:11,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:11,092 INFO L93 Difference]: Finished difference Result 30843 states and 41972 transitions. [2021-11-07 01:31:11,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 01:31:11,093 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-11-07 01:31:11,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:11,158 INFO L225 Difference]: With dead ends: 30843 [2021-11-07 01:31:11,158 INFO L226 Difference]: Without dead ends: 22693 [2021-11-07 01:31:11,179 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 522 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:31:11,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22693 states. [2021-11-07 01:31:11,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22693 to 8204. [2021-11-07 01:31:11,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8204 states, 8101 states have (on average 1.3795827675595604) internal successors, (11176), 8203 states have internal predecessors, (11176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:11,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8204 states to 8204 states and 11176 transitions. [2021-11-07 01:31:11,918 INFO L78 Accepts]: Start accepts. Automaton has 8204 states and 11176 transitions. Word has length 133 [2021-11-07 01:31:11,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:11,918 INFO L470 AbstractCegarLoop]: Abstraction has 8204 states and 11176 transitions. [2021-11-07 01:31:11,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:11,919 INFO L276 IsEmpty]: Start isEmpty. Operand 8204 states and 11176 transitions. [2021-11-07 01:31:11,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-07 01:31:11,923 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:11,923 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:11,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:12,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:12,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:31:12,338 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr108ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-07 01:31:12,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:12,339 INFO L85 PathProgramCache]: Analyzing trace with hash 2067518463, now seen corresponding path program 1 times [2021-11-07 01:31:12,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:12,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1957471808] [2021-11-07 01:31:12,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:12,342 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:12,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:12,343 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:12,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 01:31:17,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:18,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 1642 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:31:18,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:19,110 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 01:31:19,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:20,297 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 01:31:20,297 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:20,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1957471808] [2021-11-07 01:31:20,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1957471808] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:31:20,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1081943621] [2021-11-07 01:31:20,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:20,298 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:31:20,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:31:20,299 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:31:20,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-07 01:31:23,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:23,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 1642 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:31:23,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:23,930 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 01:31:23,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:24,452 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 01:31:24,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1081943621] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:24,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:31:24,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-07 01:31:24,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193776953] [2021-11-07 01:31:24,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:31:24,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:24,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:31:24,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:31:24,453 INFO L87 Difference]: Start difference. First operand 8204 states and 11176 transitions. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:27,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:27,862 INFO L93 Difference]: Finished difference Result 36596 states and 49852 transitions. [2021-11-07 01:31:27,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 01:31:27,863 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-11-07 01:31:27,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:27,902 INFO L225 Difference]: With dead ends: 36596 [2021-11-07 01:31:27,902 INFO L226 Difference]: Without dead ends: 28434 [2021-11-07 01:31:27,918 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 526 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:31:27,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28434 states. [2021-11-07 01:31:28,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28434 to 8216. [2021-11-07 01:31:28,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8216 states, 8113 states have (on average 1.3790213238013065) internal successors, (11188), 8215 states have internal predecessors, (11188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:28,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8216 states to 8216 states and 11188 transitions. [2021-11-07 01:31:28,609 INFO L78 Accepts]: Start accepts. Automaton has 8216 states and 11188 transitions. Word has length 134 [2021-11-07 01:31:28,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:28,610 INFO L470 AbstractCegarLoop]: Abstraction has 8216 states and 11188 transitions. [2021-11-07 01:31:28,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:28,610 INFO L276 IsEmpty]: Start isEmpty. Operand 8216 states and 11188 transitions. [2021-11-07 01:31:28,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-07 01:31:28,614 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:28,614 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:28,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:28,850 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2021-11-07 01:31:29,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:31:29,035 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr108ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-07 01:31:29,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:29,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1969283395, now seen corresponding path program 1 times [2021-11-07 01:31:29,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:29,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1329785242] [2021-11-07 01:31:29,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:29,038 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:29,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:29,039 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:29,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 01:31:34,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:34,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 1641 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:31:34,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:35,411 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 01:31:35,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:36,594 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 01:31:36,594 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:36,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1329785242] [2021-11-07 01:31:36,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1329785242] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:31:36,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [449554392] [2021-11-07 01:31:36,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:36,595 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:31:36,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:31:36,604 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:31:36,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-07 01:31:39,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:39,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 1641 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:31:39,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:40,477 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 01:31:40,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:40,762 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 01:31:40,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [449554392] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:40,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:31:40,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 01:31:40,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488879716] [2021-11-07 01:31:40,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:31:40,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:40,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:31:40,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:31:40,765 INFO L87 Difference]: Start difference. First operand 8216 states and 11188 transitions. Second operand has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:42,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:42,540 INFO L93 Difference]: Finished difference Result 29502 states and 40159 transitions. [2021-11-07 01:31:42,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:31:42,541 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-11-07 01:31:42,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:42,570 INFO L225 Difference]: With dead ends: 29502 [2021-11-07 01:31:42,570 INFO L226 Difference]: Without dead ends: 21328 [2021-11-07 01:31:42,582 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 525 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:31:42,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21328 states. [2021-11-07 01:31:43,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21328 to 8216. [2021-11-07 01:31:43,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8216 states, 8113 states have (on average 1.378528287932947) internal successors, (11184), 8215 states have internal predecessors, (11184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:43,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8216 states to 8216 states and 11184 transitions. [2021-11-07 01:31:43,404 INFO L78 Accepts]: Start accepts. Automaton has 8216 states and 11184 transitions. Word has length 134 [2021-11-07 01:31:43,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:43,405 INFO L470 AbstractCegarLoop]: Abstraction has 8216 states and 11184 transitions. [2021-11-07 01:31:43,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:43,405 INFO L276 IsEmpty]: Start isEmpty. Operand 8216 states and 11184 transitions. [2021-11-07 01:31:43,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-07 01:31:43,409 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:43,409 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:43,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:43,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2021-11-07 01:31:43,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:31:43,834 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr108ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-07 01:31:43,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:43,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1045820223, now seen corresponding path program 1 times [2021-11-07 01:31:43,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:43,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706030089] [2021-11-07 01:31:43,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:43,838 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:43,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:43,839 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:43,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-07 01:31:49,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:49,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 1642 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:31:49,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:50,835 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 01:31:50,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:52,036 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 01:31:52,036 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:52,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706030089] [2021-11-07 01:31:52,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706030089] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:31:52,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [732888060] [2021-11-07 01:31:52,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:52,038 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:31:52,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:31:52,050 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:31:52,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-07 01:31:55,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:55,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 1642 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:31:55,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:56,042 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 01:31:56,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:56,417 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 01:31:56,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [732888060] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:56,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:31:56,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:31:56,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771393735] [2021-11-07 01:31:56,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:31:56,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:56,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:31:56,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:31:56,420 INFO L87 Difference]: Start difference. First operand 8216 states and 11184 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:00,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:00,510 INFO L93 Difference]: Finished difference Result 16282 states and 22264 transitions. [2021-11-07 01:32:00,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:32:00,511 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-11-07 01:32:00,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:00,521 INFO L225 Difference]: With dead ends: 16282 [2021-11-07 01:32:00,522 INFO L226 Difference]: Without dead ends: 8108 [2021-11-07 01:32:00,529 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 525 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:32:00,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8108 states. [2021-11-07 01:32:01,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8108 to 8108. [2021-11-07 01:32:01,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8108 states, 8059 states have (on average 1.368407991065889) internal successors, (11028), 8107 states have internal predecessors, (11028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:01,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8108 states to 8108 states and 11028 transitions. [2021-11-07 01:32:01,165 INFO L78 Accepts]: Start accepts. Automaton has 8108 states and 11028 transitions. Word has length 134 [2021-11-07 01:32:01,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:01,165 INFO L470 AbstractCegarLoop]: Abstraction has 8108 states and 11028 transitions. [2021-11-07 01:32:01,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:01,166 INFO L276 IsEmpty]: Start isEmpty. Operand 8108 states and 11028 transitions. [2021-11-07 01:32:01,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-07 01:32:01,169 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:01,169 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:32:01,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:01,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:01,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:32:01,594 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr108ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-07 01:32:01,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:01,595 INFO L85 PathProgramCache]: Analyzing trace with hash -11751649, now seen corresponding path program 1 times [2021-11-07 01:32:01,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:01,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [261616439] [2021-11-07 01:32:01,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:01,598 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:01,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:01,599 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:01,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-07 01:32:07,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:07,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 1641 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:32:07,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:08,554 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 01:32:08,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:09,771 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 01:32:09,771 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:09,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [261616439] [2021-11-07 01:32:09,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [261616439] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:32:09,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2015275659] [2021-11-07 01:32:09,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:09,772 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:32:09,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:32:09,775 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:32:09,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-07 01:32:13,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:13,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 1641 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:32:13,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:13,806 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 01:32:13,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:14,371 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 01:32:14,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2015275659] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:14,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:32:14,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-07 01:32:14,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036222507] [2021-11-07 01:32:14,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:32:14,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:14,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:32:14,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:32:14,373 INFO L87 Difference]: Start difference. First operand 8108 states and 11028 transitions. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:16,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:16,307 INFO L93 Difference]: Finished difference Result 24128 states and 32752 transitions. [2021-11-07 01:32:16,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:32:16,308 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-11-07 01:32:16,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:16,329 INFO L225 Difference]: With dead ends: 24128 [2021-11-07 01:32:16,329 INFO L226 Difference]: Without dead ends: 16062 [2021-11-07 01:32:16,338 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 522 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:32:16,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16062 states. [2021-11-07 01:32:16,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16062 to 5764. [2021-11-07 01:32:16,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5764 states, 5721 states have (on average 1.3633980073413738) internal successors, (7800), 5763 states have internal predecessors, (7800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:16,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5764 states to 5764 states and 7800 transitions. [2021-11-07 01:32:16,913 INFO L78 Accepts]: Start accepts. Automaton has 5764 states and 7800 transitions. Word has length 134 [2021-11-07 01:32:16,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:16,913 INFO L470 AbstractCegarLoop]: Abstraction has 5764 states and 7800 transitions. [2021-11-07 01:32:16,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:16,913 INFO L276 IsEmpty]: Start isEmpty. Operand 5764 states and 7800 transitions. [2021-11-07 01:32:16,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-07 01:32:16,917 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:16,917 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:32:16,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:17,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:17,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:17,330 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-07 01:32:17,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:17,331 INFO L85 PathProgramCache]: Analyzing trace with hash -405662120, now seen corresponding path program 1 times [2021-11-07 01:32:17,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:17,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1533796936] [2021-11-07 01:32:17,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:17,334 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:17,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:17,334 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:17,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-07 01:32:23,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:23,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 1772 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:32:23,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:24,514 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-07 01:32:24,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:25,793 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-07 01:32:25,794 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:25,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1533796936] [2021-11-07 01:32:25,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1533796936] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:32:25,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2107474472] [2021-11-07 01:32:25,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:25,795 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:32:25,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:32:25,796 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:32:25,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-07 01:32:29,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:29,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 1772 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:32:29,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:30,146 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 01:32:30,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:30,756 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 01:32:30,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2107474472] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:30,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:32:30,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [5, 5] total 10 [2021-11-07 01:32:30,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504574055] [2021-11-07 01:32:30,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:32:30,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:30,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:32:30,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:32:30,758 INFO L87 Difference]: Start difference. First operand 5764 states and 7800 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:31,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:31,816 INFO L93 Difference]: Finished difference Result 13765 states and 18644 transitions. [2021-11-07 01:32:31,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:32:31,819 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2021-11-07 01:32:31,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:31,829 INFO L225 Difference]: With dead ends: 13765 [2021-11-07 01:32:31,829 INFO L226 Difference]: Without dead ends: 8043 [2021-11-07 01:32:31,834 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 564 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:32:31,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8043 states. [2021-11-07 01:32:32,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8043 to 5802. [2021-11-07 01:32:32,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5802 states, 5759 states have (on average 1.3606528911269318) internal successors, (7836), 5801 states have internal predecessors, (7836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:32,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5802 states to 5802 states and 7836 transitions. [2021-11-07 01:32:32,288 INFO L78 Accepts]: Start accepts. Automaton has 5802 states and 7836 transitions. Word has length 144 [2021-11-07 01:32:32,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:32,288 INFO L470 AbstractCegarLoop]: Abstraction has 5802 states and 7836 transitions. [2021-11-07 01:32:32,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:32,288 INFO L276 IsEmpty]: Start isEmpty. Operand 5802 states and 7836 transitions. [2021-11-07 01:32:32,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-07 01:32:32,291 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:32,291 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:32:32,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:32,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-11-07 01:32:32,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:32,692 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-07 01:32:32,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:32,692 INFO L85 PathProgramCache]: Analyzing trace with hash 235098984, now seen corresponding path program 1 times [2021-11-07 01:32:32,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:32,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [127002844] [2021-11-07 01:32:32,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:32,695 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:32,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:32,696 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:32,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-07 01:32:38,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:39,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 1772 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:32:39,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:40,094 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-07 01:32:40,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:41,494 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-07 01:32:41,494 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:41,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [127002844] [2021-11-07 01:32:41,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [127002844] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:32:41,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1425964013] [2021-11-07 01:32:41,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:41,495 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:32:41,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:32:41,496 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:32:41,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-07 01:32:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:45,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 1772 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:32:45,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:45,988 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 01:32:45,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:46,314 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 01:32:46,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1425964013] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:46,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:32:46,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:32:46,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009103760] [2021-11-07 01:32:46,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:32:46,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:46,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:32:46,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:32:46,317 INFO L87 Difference]: Start difference. First operand 5802 states and 7836 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:46,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:46,839 INFO L93 Difference]: Finished difference Result 11564 states and 15626 transitions. [2021-11-07 01:32:46,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:32:46,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2021-11-07 01:32:46,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:46,847 INFO L225 Difference]: With dead ends: 11564 [2021-11-07 01:32:46,847 INFO L226 Difference]: Without dead ends: 5804 [2021-11-07 01:32:46,852 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 565 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:32:46,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5804 states. [2021-11-07 01:32:47,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5804 to 5804. [2021-11-07 01:32:47,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5804 states, 5761 states have (on average 1.3605276861655962) internal successors, (7838), 5803 states have internal predecessors, (7838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:47,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5804 states to 5804 states and 7838 transitions. [2021-11-07 01:32:47,311 INFO L78 Accepts]: Start accepts. Automaton has 5804 states and 7838 transitions. Word has length 144 [2021-11-07 01:32:47,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:47,311 INFO L470 AbstractCegarLoop]: Abstraction has 5804 states and 7838 transitions. [2021-11-07 01:32:47,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:47,311 INFO L276 IsEmpty]: Start isEmpty. Operand 5804 states and 7838 transitions. [2021-11-07 01:32:47,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-07 01:32:47,314 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:47,314 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:32:47,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:47,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:47,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:32:47,719 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-07 01:32:47,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:47,719 INFO L85 PathProgramCache]: Analyzing trace with hash 453953702, now seen corresponding path program 1 times [2021-11-07 01:32:47,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:47,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [654708496] [2021-11-07 01:32:47,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:47,723 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:47,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:47,723 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:47,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-07 01:32:53,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:54,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 1775 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:32:54,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:55,114 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-07 01:32:55,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:56,390 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-07 01:32:56,390 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:56,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [654708496] [2021-11-07 01:32:56,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [654708496] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:32:56,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1448777994] [2021-11-07 01:32:56,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:56,392 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:32:56,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:32:56,393 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:32:56,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-07 01:33:00,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:00,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 1775 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:33:00,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:01,613 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 01:33:01,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:02,262 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 01:33:02,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1448777994] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:02,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:33:02,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-07 01:33:02,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541310893] [2021-11-07 01:33:02,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:33:02,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:02,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:33:02,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:33:02,264 INFO L87 Difference]: Start difference. First operand 5804 states and 7838 transitions. Second operand has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:16,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:16,008 INFO L93 Difference]: Finished difference Result 31375 states and 42288 transitions. [2021-11-07 01:33:16,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:33:16,008 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2021-11-07 01:33:16,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:16,040 INFO L225 Difference]: With dead ends: 31375 [2021-11-07 01:33:16,040 INFO L226 Difference]: Without dead ends: 25613 [2021-11-07 01:33:16,049 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 564 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:33:16,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25613 states. [2021-11-07 01:33:16,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25613 to 5810. [2021-11-07 01:33:16,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5810 states, 5767 states have (on average 1.3601525923357032) internal successors, (7844), 5809 states have internal predecessors, (7844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:16,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5810 states to 5810 states and 7844 transitions. [2021-11-07 01:33:16,653 INFO L78 Accepts]: Start accepts. Automaton has 5810 states and 7844 transitions. Word has length 144 [2021-11-07 01:33:16,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:16,653 INFO L470 AbstractCegarLoop]: Abstraction has 5810 states and 7844 transitions. [2021-11-07 01:33:16,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:16,654 INFO L276 IsEmpty]: Start isEmpty. Operand 5810 states and 7844 transitions. [2021-11-07 01:33:16,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-07 01:33:16,656 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:16,657 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:16,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:16,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:17,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:33:17,059 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-07 01:33:17,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:17,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1900584387, now seen corresponding path program 1 times [2021-11-07 01:33:17,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:17,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065137579] [2021-11-07 01:33:17,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:17,063 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:17,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:17,065 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:17,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-07 01:33:23,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:23,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 1786 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:33:23,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:24,973 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-07 01:33:24,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:26,293 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-07 01:33:26,294 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:26,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1065137579] [2021-11-07 01:33:26,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1065137579] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:33:26,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1891576396] [2021-11-07 01:33:26,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:26,294 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:33:26,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:33:26,295 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:33:26,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-07 01:33:30,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:30,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 1786 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:33:30,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:31,293 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 01:33:31,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:31,856 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 01:33:31,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1891576396] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:31,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:33:31,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-07 01:33:31,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507480543] [2021-11-07 01:33:31,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:33:31,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:31,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:33:31,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:33:31,859 INFO L87 Difference]: Start difference. First operand 5810 states and 7844 transitions. Second operand has 8 states, 8 states have (on average 17.375) internal successors, (139), 8 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:37,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:37,218 INFO L93 Difference]: Finished difference Result 35139 states and 47313 transitions. [2021-11-07 01:33:37,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 01:33:37,219 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.375) internal successors, (139), 8 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-11-07 01:33:37,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:37,256 INFO L225 Difference]: With dead ends: 35139 [2021-11-07 01:33:37,256 INFO L226 Difference]: Without dead ends: 29371 [2021-11-07 01:33:37,264 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 570 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:33:37,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29371 states. [2021-11-07 01:33:37,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29371 to 5603. [2021-11-07 01:33:37,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5603 states, 5563 states have (on average 1.358080172568758) internal successors, (7555), 5602 states have internal predecessors, (7555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:37,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5603 states to 5603 states and 7555 transitions. [2021-11-07 01:33:37,965 INFO L78 Accepts]: Start accepts. Automaton has 5603 states and 7555 transitions. Word has length 145 [2021-11-07 01:33:37,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:37,966 INFO L470 AbstractCegarLoop]: Abstraction has 5603 states and 7555 transitions. [2021-11-07 01:33:37,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.375) internal successors, (139), 8 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:37,966 INFO L276 IsEmpty]: Start isEmpty. Operand 5603 states and 7555 transitions. [2021-11-07 01:33:37,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-07 01:33:37,970 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:37,970 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:38,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:38,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2021-11-07 01:33:38,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:38,395 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-07 01:33:38,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:38,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1414981502, now seen corresponding path program 1 times [2021-11-07 01:33:38,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:38,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [570209895] [2021-11-07 01:33:38,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:38,399 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:38,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:38,401 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:38,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-07 01:33:44,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:45,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 1696 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:33:45,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:46,055 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-07 01:33:46,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:47,315 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-07 01:33:47,315 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:47,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [570209895] [2021-11-07 01:33:47,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [570209895] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:33:47,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1380417865] [2021-11-07 01:33:47,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:47,316 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:33:47,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:33:47,317 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:33:47,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2021-11-07 01:33:51,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:52,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 1696 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:33:52,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:52,406 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 01:33:52,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:52,717 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 01:33:52,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1380417865] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:52,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:33:52,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:33:52,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383858563] [2021-11-07 01:33:52,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:33:52,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:52,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:33:52,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:33:52,719 INFO L87 Difference]: Start difference. First operand 5603 states and 7555 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:53,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:53,318 INFO L93 Difference]: Finished difference Result 11166 states and 15064 transitions. [2021-11-07 01:33:53,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:33:53,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-11-07 01:33:53,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:53,324 INFO L225 Difference]: With dead ends: 11166 [2021-11-07 01:33:53,325 INFO L226 Difference]: Without dead ends: 5605 [2021-11-07 01:33:53,332 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 569 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:33:53,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5605 states. [2021-11-07 01:33:54,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5605 to 5605. [2021-11-07 01:33:54,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5605 states, 5565 states have (on average 1.3579514824797845) internal successors, (7557), 5604 states have internal predecessors, (7557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:54,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5605 states to 5605 states and 7557 transitions. [2021-11-07 01:33:54,021 INFO L78 Accepts]: Start accepts. Automaton has 5605 states and 7557 transitions. Word has length 145 [2021-11-07 01:33:54,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:54,022 INFO L470 AbstractCegarLoop]: Abstraction has 5605 states and 7557 transitions. [2021-11-07 01:33:54,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:54,022 INFO L276 IsEmpty]: Start isEmpty. Operand 5605 states and 7557 transitions. [2021-11-07 01:33:54,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-07 01:33:54,025 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:54,026 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:54,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:54,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:54,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:54,446 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-07 01:33:54,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:54,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1633836220, now seen corresponding path program 1 times [2021-11-07 01:33:54,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:54,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [978054100] [2021-11-07 01:33:54,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:54,450 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:54,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:54,451 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:54,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-07 01:34:01,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:01,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 1699 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:34:01,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:02,245 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-07 01:34:02,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:03,513 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-07 01:34:03,513 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:03,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [978054100] [2021-11-07 01:34:03,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [978054100] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:34:03,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [646189663] [2021-11-07 01:34:03,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:03,513 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:34:03,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:34:03,514 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:34:03,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2021-11-07 01:34:08,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:08,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 1699 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:34:08,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:08,779 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 01:34:08,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:09,462 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 01:34:09,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [646189663] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:09,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:34:09,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-07 01:34:09,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749262803] [2021-11-07 01:34:09,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:34:09,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:09,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:34:09,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:34:09,464 INFO L87 Difference]: Start difference. First operand 5605 states and 7557 transitions. Second operand has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:24,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:24,377 INFO L93 Difference]: Finished difference Result 29482 states and 39730 transitions. [2021-11-07 01:34:24,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 01:34:24,377 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-11-07 01:34:24,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:24,409 INFO L225 Difference]: With dead ends: 29482 [2021-11-07 01:34:24,409 INFO L226 Difference]: Without dead ends: 23919 [2021-11-07 01:34:24,418 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 570 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:34:24,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23919 states. [2021-11-07 01:34:25,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23919 to 5611. [2021-11-07 01:34:25,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5611 states, 5571 states have (on average 1.3575659666128164) internal successors, (7563), 5610 states have internal predecessors, (7563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:25,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5611 states to 5611 states and 7563 transitions. [2021-11-07 01:34:25,337 INFO L78 Accepts]: Start accepts. Automaton has 5611 states and 7563 transitions. Word has length 145 [2021-11-07 01:34:25,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:25,337 INFO L470 AbstractCegarLoop]: Abstraction has 5611 states and 7563 transitions. [2021-11-07 01:34:25,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:25,338 INFO L276 IsEmpty]: Start isEmpty. Operand 5611 states and 7563 transitions. [2021-11-07 01:34:25,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-07 01:34:25,346 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:25,346 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:34:25,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:25,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2021-11-07 01:34:25,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:34:25,774 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-07 01:34:25,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:25,775 INFO L85 PathProgramCache]: Analyzing trace with hash -142190953, now seen corresponding path program 1 times [2021-11-07 01:34:25,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:25,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1926734280] [2021-11-07 01:34:25,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:25,778 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:25,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:25,779 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:25,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-07 01:34:32,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:33,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 1710 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:34:33,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:34,039 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-07 01:34:34,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:35,349 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-07 01:34:35,349 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:35,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1926734280] [2021-11-07 01:34:35,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1926734280] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:34:35,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1186074071] [2021-11-07 01:34:35,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:35,350 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:34:35,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:34:35,351 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:34:35,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2021-11-07 01:34:40,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:40,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 1710 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:34:40,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:40,962 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 01:34:40,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:41,513 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 01:34:41,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1186074071] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:41,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:34:41,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-07 01:34:41,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234762600] [2021-11-07 01:34:41,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:34:41,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:41,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:34:41,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:34:41,515 INFO L87 Difference]: Start difference. First operand 5611 states and 7563 transitions. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:47,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:47,186 INFO L93 Difference]: Finished difference Result 30982 states and 41714 transitions. [2021-11-07 01:34:47,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 01:34:47,186 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2021-11-07 01:34:47,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:47,220 INFO L225 Difference]: With dead ends: 30982 [2021-11-07 01:34:47,220 INFO L226 Difference]: Without dead ends: 25413 [2021-11-07 01:34:47,229 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 574 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:34:47,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25413 states. [2021-11-07 01:34:48,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25413 to 5124. [2021-11-07 01:34:48,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5124 states, 5085 states have (on average 1.3569321533923304) internal successors, (6900), 5123 states have internal predecessors, (6900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:48,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5124 states to 5124 states and 6900 transitions. [2021-11-07 01:34:48,185 INFO L78 Accepts]: Start accepts. Automaton has 5124 states and 6900 transitions. Word has length 146 [2021-11-07 01:34:48,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:48,185 INFO L470 AbstractCegarLoop]: Abstraction has 5124 states and 6900 transitions. [2021-11-07 01:34:48,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:48,186 INFO L276 IsEmpty]: Start isEmpty. Operand 5124 states and 6900 transitions. [2021-11-07 01:34:48,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-07 01:34:48,189 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:48,189 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:34:48,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:48,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (47)] Ended with exit code 0 [2021-11-07 01:34:48,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:34:48,596 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr113ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-07 01:34:48,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:48,596 INFO L85 PathProgramCache]: Analyzing trace with hash -2113427720, now seen corresponding path program 1 times [2021-11-07 01:34:48,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:48,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1610762340] [2021-11-07 01:34:48,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:48,599 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:48,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:48,600 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:48,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-07 01:34:55,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:55,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 1683 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:34:55,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:56,986 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-07 01:34:56,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:58,283 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-07 01:34:58,283 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:58,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1610762340] [2021-11-07 01:34:58,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1610762340] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:34:58,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [412568128] [2021-11-07 01:34:58,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:58,284 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:34:58,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:34:58,285 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:34:58,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2021-11-07 01:35:03,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:03,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 1683 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:35:03,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:04,142 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 01:35:04,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:04,810 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 01:35:04,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [412568128] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:04,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:35:04,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-07 01:35:04,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921768236] [2021-11-07 01:35:04,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:35:04,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:35:04,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:35:04,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:35:04,812 INFO L87 Difference]: Start difference. First operand 5124 states and 6900 transitions. Second operand has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:07,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:07,668 INFO L93 Difference]: Finished difference Result 16046 states and 21647 transitions. [2021-11-07 01:35:07,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:35:07,668 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-11-07 01:35:07,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:07,687 INFO L225 Difference]: With dead ends: 16046 [2021-11-07 01:35:07,687 INFO L226 Difference]: Without dead ends: 15084 [2021-11-07 01:35:07,691 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 586 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:35:07,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15084 states. [2021-11-07 01:35:08,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15084 to 5124. [2021-11-07 01:35:08,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5124 states, 5085 states have (on average 1.3561455260570305) internal successors, (6896), 5123 states have internal predecessors, (6896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:08,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5124 states to 5124 states and 6896 transitions. [2021-11-07 01:35:08,571 INFO L78 Accepts]: Start accepts. Automaton has 5124 states and 6896 transitions. Word has length 150 [2021-11-07 01:35:08,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:08,572 INFO L470 AbstractCegarLoop]: Abstraction has 5124 states and 6896 transitions. [2021-11-07 01:35:08,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:08,572 INFO L276 IsEmpty]: Start isEmpty. Operand 5124 states and 6896 transitions. [2021-11-07 01:35:08,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-07 01:35:08,574 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:08,574 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:08,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (49)] Forceful destruction successful, exit code 0 [2021-11-07 01:35:08,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (48)] Ended with exit code 0 [2021-11-07 01:35:08,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:35:08,975 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr113ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-07 01:35:08,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:08,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1672066486, now seen corresponding path program 1 times [2021-11-07 01:35:08,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:35:08,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [54956018] [2021-11-07 01:35:08,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:08,979 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:35:08,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:35:08,980 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:35:08,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-11-07 01:35:16,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:16,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 1682 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:35:16,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:17,458 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-07 01:35:17,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:18,748 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-07 01:35:18,748 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:35:18,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [54956018] [2021-11-07 01:35:18,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [54956018] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:35:18,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1935982780] [2021-11-07 01:35:18,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:18,749 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:35:18,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:35:18,750 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:35:18,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2021-11-07 01:35:23,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:24,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 1682 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:35:24,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:24,824 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 01:35:24,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:25,340 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 01:35:25,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1935982780] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:25,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:35:25,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 01:35:25,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038400482] [2021-11-07 01:35:25,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:35:25,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:35:25,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:35:25,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:35:25,343 INFO L87 Difference]: Start difference. First operand 5124 states and 6896 transitions. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:27,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:27,184 INFO L93 Difference]: Finished difference Result 7888 states and 10588 transitions. [2021-11-07 01:35:27,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:35:27,185 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-11-07 01:35:27,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:27,194 INFO L225 Difference]: With dead ends: 7888 [2021-11-07 01:35:27,194 INFO L226 Difference]: Without dead ends: 6938 [2021-11-07 01:35:27,197 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 588 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:35:27,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6938 states. [2021-11-07 01:35:28,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6938 to 5124. [2021-11-07 01:35:28,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5124 states, 5085 states have (on average 1.3557522123893806) internal successors, (6894), 5123 states have internal predecessors, (6894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:28,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5124 states to 5124 states and 6894 transitions. [2021-11-07 01:35:28,081 INFO L78 Accepts]: Start accepts. Automaton has 5124 states and 6894 transitions. Word has length 150 [2021-11-07 01:35:28,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:28,081 INFO L470 AbstractCegarLoop]: Abstraction has 5124 states and 6894 transitions. [2021-11-07 01:35:28,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:28,082 INFO L276 IsEmpty]: Start isEmpty. Operand 5124 states and 6894 transitions. [2021-11-07 01:35:28,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-07 01:35:28,084 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:28,084 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:28,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (51)] Forceful destruction successful, exit code 0 [2021-11-07 01:35:28,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-11-07 01:35:28,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:35:28,486 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr113ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-07 01:35:28,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:28,486 INFO L85 PathProgramCache]: Analyzing trace with hash 385421910, now seen corresponding path program 1 times [2021-11-07 01:35:28,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:35:28,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [772934099] [2021-11-07 01:35:28,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:28,489 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:35:28,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:35:28,490 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:35:28,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-11-07 01:35:35,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:35,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 1683 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:35:35,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:36,983 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-07 01:35:36,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:38,271 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-07 01:35:38,271 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:35:38,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [772934099] [2021-11-07 01:35:38,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [772934099] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:35:38,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1912241149] [2021-11-07 01:35:38,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:38,273 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:35:38,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:35:38,274 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:35:38,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2021-11-07 01:35:43,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:43,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 1683 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:35:43,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:44,506 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 01:35:44,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:44,909 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 01:35:44,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1912241149] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:44,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:35:44,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 01:35:44,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142788020] [2021-11-07 01:35:44,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:35:44,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:35:44,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:35:44,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:35:44,911 INFO L87 Difference]: Start difference. First operand 5124 states and 6894 transitions. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:48,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:48,016 INFO L93 Difference]: Finished difference Result 16022 states and 21609 transitions. [2021-11-07 01:35:48,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:35:48,017 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-11-07 01:35:48,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:48,036 INFO L225 Difference]: With dead ends: 16022 [2021-11-07 01:35:48,036 INFO L226 Difference]: Without dead ends: 15060 [2021-11-07 01:35:48,040 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 589 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:35:48,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15060 states. [2021-11-07 01:35:49,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15060 to 5112. [2021-11-07 01:35:49,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5112 states, 5073 states have (on average 1.3558052434456929) internal successors, (6878), 5111 states have internal predecessors, (6878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:49,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5112 states to 5112 states and 6878 transitions. [2021-11-07 01:35:49,034 INFO L78 Accepts]: Start accepts. Automaton has 5112 states and 6878 transitions. Word has length 150 [2021-11-07 01:35:49,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:49,034 INFO L470 AbstractCegarLoop]: Abstraction has 5112 states and 6878 transitions. [2021-11-07 01:35:49,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:49,035 INFO L276 IsEmpty]: Start isEmpty. Operand 5112 states and 6878 transitions. [2021-11-07 01:35:49,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-07 01:35:49,038 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:49,038 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:49,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2021-11-07 01:35:49,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (53)] Ended with exit code 0 [2021-11-07 01:35:49,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:35:49,439 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr113ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-07 01:35:49,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:49,439 INFO L85 PathProgramCache]: Analyzing trace with hash 192637924, now seen corresponding path program 1 times [2021-11-07 01:35:49,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:35:49,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [714329991] [2021-11-07 01:35:49,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:49,444 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:35:49,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:35:49,444 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:35:49,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-11-07 01:35:56,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:57,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 1693 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:35:57,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:58,174 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-07 01:35:58,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:59,580 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-07 01:35:59,580 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:35:59,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [714329991] [2021-11-07 01:35:59,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [714329991] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:35:59,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [550388425] [2021-11-07 01:35:59,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:59,581 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:35:59,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:35:59,582 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:35:59,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2021-11-07 01:36:05,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:05,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 1693 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:36:05,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:06,099 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 01:36:06,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:06,580 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 01:36:06,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [550388425] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:06,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:36:06,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 01:36:06,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842640654] [2021-11-07 01:36:06,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:36:06,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:06,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:36:06,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:36:06,583 INFO L87 Difference]: Start difference. First operand 5112 states and 6878 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:08,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:08,208 INFO L93 Difference]: Finished difference Result 6962 states and 9343 transitions. [2021-11-07 01:36:08,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:36:08,209 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2021-11-07 01:36:08,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:08,217 INFO L225 Difference]: With dead ends: 6962 [2021-11-07 01:36:08,217 INFO L226 Difference]: Without dead ends: 6012 [2021-11-07 01:36:08,220 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 636 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:36:08,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6012 states. [2021-11-07 01:36:09,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6012 to 5112. [2021-11-07 01:36:09,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5112 states, 5073 states have (on average 1.3556081214271634) internal successors, (6877), 5111 states have internal predecessors, (6877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:09,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5112 states to 5112 states and 6877 transitions. [2021-11-07 01:36:09,155 INFO L78 Accepts]: Start accepts. Automaton has 5112 states and 6877 transitions. Word has length 162 [2021-11-07 01:36:09,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:09,156 INFO L470 AbstractCegarLoop]: Abstraction has 5112 states and 6877 transitions. [2021-11-07 01:36:09,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:09,156 INFO L276 IsEmpty]: Start isEmpty. Operand 5112 states and 6877 transitions. [2021-11-07 01:36:09,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-07 01:36:09,159 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:09,159 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:36:09,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (55)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:09,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:09,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:36:09,560 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr113ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-07 01:36:09,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:09,561 INFO L85 PathProgramCache]: Analyzing trace with hash 445130423, now seen corresponding path program 1 times [2021-11-07 01:36:09,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:09,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [539630494] [2021-11-07 01:36:09,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:09,564 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:09,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:09,565 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:09,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-11-07 01:36:17,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:17,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 1693 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:36:17,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:18,482 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-07 01:36:18,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:19,877 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-07 01:36:19,877 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:19,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [539630494] [2021-11-07 01:36:19,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [539630494] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:36:19,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [81781074] [2021-11-07 01:36:19,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:19,878 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:36:19,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:36:19,879 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:36:19,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2021-11-07 01:36:25,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:25,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 1693 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:36:25,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:26,566 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 01:36:26,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:27,051 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 01:36:27,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [81781074] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:27,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:36:27,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 01:36:27,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77050111] [2021-11-07 01:36:27,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:36:27,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:27,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:36:27,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:36:27,053 INFO L87 Difference]: Start difference. First operand 5112 states and 6877 transitions. Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:28,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:28,480 INFO L93 Difference]: Finished difference Result 6012 states and 8083 transitions. [2021-11-07 01:36:28,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:36:28,481 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2021-11-07 01:36:28,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:28,487 INFO L225 Difference]: With dead ends: 6012 [2021-11-07 01:36:28,487 INFO L226 Difference]: Without dead ends: 5062 [2021-11-07 01:36:28,490 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 640 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:36:28,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5062 states. [2021-11-07 01:36:29,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5062 to 4162. [2021-11-07 01:36:29,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4162 states, 4132 states have (on average 1.3593901258470473) internal successors, (5617), 4161 states have internal predecessors, (5617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:29,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4162 states to 4162 states and 5617 transitions. [2021-11-07 01:36:29,206 INFO L78 Accepts]: Start accepts. Automaton has 4162 states and 5617 transitions. Word has length 163 [2021-11-07 01:36:29,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:29,207 INFO L470 AbstractCegarLoop]: Abstraction has 4162 states and 5617 transitions. [2021-11-07 01:36:29,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:29,207 INFO L276 IsEmpty]: Start isEmpty. Operand 4162 states and 5617 transitions. [2021-11-07 01:36:29,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-07 01:36:29,210 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:29,210 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:36:29,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:29,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (57)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:29,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:36:29,611 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr84ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-07 01:36:29,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:29,612 INFO L85 PathProgramCache]: Analyzing trace with hash -308134070, now seen corresponding path program 1 times [2021-11-07 01:36:29,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:29,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1762335027] [2021-11-07 01:36:29,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:29,616 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:29,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:29,617 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:29,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-11-07 01:36:37,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:37,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 1947 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:36:37,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:39,114 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 01:36:39,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:40,578 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 01:36:40,578 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:40,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1762335027] [2021-11-07 01:36:40,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1762335027] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:36:40,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1002554400] [2021-11-07 01:36:40,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:40,579 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:36:40,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:36:40,580 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:36:40,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2021-11-07 01:36:46,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:46,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 1947 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:36:46,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:47,444 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 01:36:47,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:47,906 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 01:36:47,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1002554400] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:47,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:36:47,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:36:47,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133371171] [2021-11-07 01:36:47,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:36:47,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:47,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:36:47,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:36:47,909 INFO L87 Difference]: Start difference. First operand 4162 states and 5617 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:52,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:52,919 INFO L93 Difference]: Finished difference Result 8284 states and 11188 transitions. [2021-11-07 01:36:52,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:36:52,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2021-11-07 01:36:52,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:52,960 INFO L225 Difference]: With dead ends: 8284 [2021-11-07 01:36:52,960 INFO L226 Difference]: Without dead ends: 4164 [2021-11-07 01:36:52,964 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 692 GetRequests, 685 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:36:52,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4164 states. [2021-11-07 01:36:53,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4164 to 4164. [2021-11-07 01:36:53,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4164 states, 4134 states have (on average 1.3592162554426706) internal successors, (5619), 4163 states have internal predecessors, (5619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:53,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4164 states to 4164 states and 5619 transitions. [2021-11-07 01:36:53,673 INFO L78 Accepts]: Start accepts. Automaton has 4164 states and 5619 transitions. Word has length 174 [2021-11-07 01:36:53,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:53,674 INFO L470 AbstractCegarLoop]: Abstraction has 4164 states and 5619 transitions. [2021-11-07 01:36:53,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:53,674 INFO L276 IsEmpty]: Start isEmpty. Operand 4164 states and 5619 transitions. [2021-11-07 01:36:53,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-07 01:36:53,677 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:53,678 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:36:53,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:53,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (59)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:54,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:36:54,079 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr84ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-07 01:36:54,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:54,079 INFO L85 PathProgramCache]: Analyzing trace with hash 2141466060, now seen corresponding path program 1 times [2021-11-07 01:36:54,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:54,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [328512877] [2021-11-07 01:36:54,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:54,083 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:54,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:54,084 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:54,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2021-11-07 01:37:02,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:02,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 1950 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:37:02,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:03,918 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 01:37:03,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:05,457 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 01:37:05,457 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:05,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [328512877] [2021-11-07 01:37:05,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [328512877] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:37:05,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [292613825] [2021-11-07 01:37:05,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:05,458 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:37:05,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:37:05,459 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:37:05,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2021-11-07 01:37:11,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:11,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 1950 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:37:11,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:12,451 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 01:37:12,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:12,893 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 01:37:12,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [292613825] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:12,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:37:12,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:37:12,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316618891] [2021-11-07 01:37:12,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:37:12,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:12,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:37:12,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:37:12,894 INFO L87 Difference]: Start difference. First operand 4164 states and 5619 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:20,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:20,026 INFO L93 Difference]: Finished difference Result 8289 states and 11194 transitions. [2021-11-07 01:37:20,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:37:20,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2021-11-07 01:37:20,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:20,032 INFO L225 Difference]: With dead ends: 8289 [2021-11-07 01:37:20,032 INFO L226 Difference]: Without dead ends: 4167 [2021-11-07 01:37:20,035 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 692 GetRequests, 685 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:37:20,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4167 states. [2021-11-07 01:37:20,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4167 to 4167. [2021-11-07 01:37:20,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4167 states, 4137 states have (on average 1.3589557650471356) internal successors, (5622), 4166 states have internal predecessors, (5622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:20,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4167 states to 4167 states and 5622 transitions. [2021-11-07 01:37:20,685 INFO L78 Accepts]: Start accepts. Automaton has 4167 states and 5622 transitions. Word has length 174 [2021-11-07 01:37:20,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:20,685 INFO L470 AbstractCegarLoop]: Abstraction has 4167 states and 5622 transitions. [2021-11-07 01:37:20,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:20,685 INFO L276 IsEmpty]: Start isEmpty. Operand 4167 states and 5622 transitions. [2021-11-07 01:37:20,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-07 01:37:20,688 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:20,688 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:20,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (61)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:20,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:21,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:37:21,090 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr84ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-07 01:37:21,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:21,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1747099274, now seen corresponding path program 1 times [2021-11-07 01:37:21,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:21,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [507395752] [2021-11-07 01:37:21,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:21,094 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:21,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:21,095 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:21,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2021-11-07 01:37:28,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:29,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 1953 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:37:29,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:30,395 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 01:37:30,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:31,887 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 01:37:31,888 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:31,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [507395752] [2021-11-07 01:37:31,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [507395752] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:37:31,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [728970859] [2021-11-07 01:37:31,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:31,888 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:37:31,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:37:31,889 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:37:31,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2021-11-07 01:37:38,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:38,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 1953 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:37:38,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:39,342 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 01:37:39,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:40,188 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 01:37:40,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [728970859] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:40,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:37:40,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-07 01:37:40,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477122132] [2021-11-07 01:37:40,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:37:40,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:40,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:37:40,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:37:40,190 INFO L87 Difference]: Start difference. First operand 4167 states and 5622 transitions. Second operand has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:52,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:52,245 INFO L93 Difference]: Finished difference Result 19392 states and 26078 transitions. [2021-11-07 01:37:52,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:37:52,245 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2021-11-07 01:37:52,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:52,262 INFO L225 Difference]: With dead ends: 19392 [2021-11-07 01:37:52,262 INFO L226 Difference]: Without dead ends: 15267 [2021-11-07 01:37:52,267 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 705 GetRequests, 686 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:37:52,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15267 states. [2021-11-07 01:37:52,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15267 to 4173. [2021-11-07 01:37:52,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4173 states, 4143 states have (on average 1.3584359160028965) internal successors, (5628), 4172 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:52,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4173 states to 4173 states and 5628 transitions. [2021-11-07 01:37:52,983 INFO L78 Accepts]: Start accepts. Automaton has 4173 states and 5628 transitions. Word has length 174 [2021-11-07 01:37:52,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:52,984 INFO L470 AbstractCegarLoop]: Abstraction has 4173 states and 5628 transitions. [2021-11-07 01:37:52,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:52,984 INFO L276 IsEmpty]: Start isEmpty. Operand 4173 states and 5628 transitions. [2021-11-07 01:37:52,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-07 01:37:52,987 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:52,987 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:53,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (63)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:53,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:53,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:37:53,390 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr84ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 112 more)] === [2021-11-07 01:37:53,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:53,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1732117517, now seen corresponding path program 1 times [2021-11-07 01:37:53,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:53,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [273114909] [2021-11-07 01:37:53,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:53,394 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:53,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:53,395 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:53,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b719ede-fee7-4099-a0fb-c6ec226c8ea5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process