./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9a343b75818c5d561b79c31bb62e9abdd9bdb0bf3f01f7efa313d9ef0f4204f4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 12:24:40,543 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 12:24:40,545 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 12:24:40,599 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 12:24:40,600 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 12:24:40,606 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 12:24:40,608 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 12:24:40,613 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 12:24:40,616 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 12:24:40,621 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 12:24:40,622 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 12:24:40,624 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 12:24:40,625 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 12:24:40,628 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 12:24:40,630 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 12:24:40,640 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 12:24:40,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 12:24:40,644 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 12:24:40,646 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 12:24:40,656 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 12:24:40,658 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 12:24:40,660 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 12:24:40,663 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 12:24:40,664 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 12:24:40,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 12:24:40,669 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 12:24:40,669 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 12:24:40,672 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 12:24:40,672 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 12:24:40,674 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 12:24:40,675 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 12:24:40,676 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 12:24:40,678 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 12:24:40,680 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 12:24:40,681 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 12:24:40,682 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 12:24:40,683 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 12:24:40,683 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 12:24:40,683 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 12:24:40,684 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 12:24:40,685 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 12:24:40,686 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-23 12:24:40,735 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 12:24:40,735 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 12:24:40,736 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 12:24:40,736 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 12:24:40,738 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 12:24:40,738 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 12:24:40,738 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 12:24:40,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 12:24:40,739 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 12:24:40,739 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 12:24:40,740 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 12:24:40,740 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 12:24:40,741 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 12:24:40,741 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 12:24:40,741 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 12:24:40,741 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 12:24:40,741 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 12:24:40,742 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 12:24:40,742 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 12:24:40,742 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 12:24:40,742 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 12:24:40,743 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 12:24:40,743 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 12:24:40,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:24:40,743 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 12:24:40,743 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 12:24:40,744 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 12:24:40,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 12:24:40,744 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 12:24:40,745 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a343b75818c5d561b79c31bb62e9abdd9bdb0bf3f01f7efa313d9ef0f4204f4 [2021-11-23 12:24:41,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 12:24:41,045 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 12:24:41,048 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 12:24:41,050 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 12:24:41,051 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 12:24:41,052 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i [2021-11-23 12:24:41,152 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/data/fd9a0d1b1/329fe562750d45c3b9fbb256ac5c93d5/FLAGfc5e2ac8e [2021-11-23 12:24:41,909 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 12:24:41,910 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i [2021-11-23 12:24:41,937 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/data/fd9a0d1b1/329fe562750d45c3b9fbb256ac5c93d5/FLAGfc5e2ac8e [2021-11-23 12:24:42,088 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/data/fd9a0d1b1/329fe562750d45c3b9fbb256ac5c93d5 [2021-11-23 12:24:42,091 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 12:24:42,092 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 12:24:42,094 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 12:24:42,094 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 12:24:42,097 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 12:24:42,098 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:24:42" (1/1) ... [2021-11-23 12:24:42,099 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cdf9dd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:24:42, skipping insertion in model container [2021-11-23 12:24:42,100 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:24:42" (1/1) ... [2021-11-23 12:24:42,107 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 12:24:42,179 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 12:24:42,800 WARN L230 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_2808af96-6a00-4aa9-8724-540827c7db91/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i[33022,33035] [2021-11-23 12:24:43,096 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:24:43,106 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) [2021-11-23 12:24:43,107 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1d74bf91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:24:43, skipping insertion in model container [2021-11-23 12:24:43,108 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 12:24:43,108 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-23 12:24:43,110 INFO L158 Benchmark]: Toolchain (without parser) took 1016.68ms. Allocated memory is still 104.9MB. Free memory was 67.9MB in the beginning and 59.3MB in the end (delta: 8.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 12:24:43,111 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 104.9MB. Free memory is still 58.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 12:24:43,115 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1013.93ms. Allocated memory is still 104.9MB. Free memory was 67.6MB in the beginning and 59.3MB in the end (delta: 8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 12:24:43,119 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 104.9MB. Free memory is still 58.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1013.93ms. Allocated memory is still 104.9MB. Free memory was 67.6MB in the beginning and 59.3MB in the end (delta: 8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 734]: 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_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9a343b75818c5d561b79c31bb62e9abdd9bdb0bf3f01f7efa313d9ef0f4204f4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 12:24:45,568 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 12:24:45,570 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 12:24:45,612 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 12:24:45,613 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 12:24:45,618 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 12:24:45,620 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 12:24:45,626 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 12:24:45,629 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 12:24:45,635 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 12:24:45,637 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 12:24:45,639 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 12:24:45,639 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 12:24:45,642 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 12:24:45,645 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 12:24:45,649 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 12:24:45,651 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 12:24:45,658 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 12:24:45,661 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 12:24:45,669 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 12:24:45,671 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 12:24:45,672 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 12:24:45,675 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 12:24:45,677 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 12:24:45,687 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 12:24:45,687 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 12:24:45,688 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 12:24:45,690 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 12:24:45,691 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 12:24:45,692 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 12:24:45,692 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 12:24:45,693 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 12:24:45,696 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 12:24:45,697 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 12:24:45,698 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 12:24:45,699 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 12:24:45,700 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 12:24:45,701 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 12:24:45,701 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 12:24:45,703 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 12:24:45,704 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 12:24:45,710 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-23 12:24:45,757 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 12:24:45,758 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 12:24:45,758 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 12:24:45,759 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 12:24:45,761 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 12:24:45,761 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 12:24:45,762 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 12:24:45,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 12:24:45,762 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 12:24:45,762 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 12:24:45,764 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 12:24:45,764 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 12:24:45,764 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 12:24:45,764 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 12:24:45,765 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 12:24:45,765 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 12:24:45,765 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 12:24:45,766 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 12:24:45,766 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 12:24:45,766 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 12:24:45,766 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 12:24:45,767 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 12:24:45,767 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 12:24:45,767 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 12:24:45,767 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 12:24:45,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:24:45,768 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 12:24:45,769 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 12:24:45,769 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-23 12:24:45,769 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 12:24:45,769 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 12:24:45,770 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 12:24:45,770 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_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a343b75818c5d561b79c31bb62e9abdd9bdb0bf3f01f7efa313d9ef0f4204f4 [2021-11-23 12:24:46,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 12:24:46,146 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 12:24:46,149 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 12:24:46,150 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 12:24:46,151 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 12:24:46,153 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i [2021-11-23 12:24:46,223 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/data/c9a6e302a/a9b102d3cd9e45399c55c332a7b99a3a/FLAGadd8375b3 [2021-11-23 12:24:46,981 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 12:24:46,982 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i [2021-11-23 12:24:47,013 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/data/c9a6e302a/a9b102d3cd9e45399c55c332a7b99a3a/FLAGadd8375b3 [2021-11-23 12:24:47,136 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/data/c9a6e302a/a9b102d3cd9e45399c55c332a7b99a3a [2021-11-23 12:24:47,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 12:24:47,151 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 12:24:47,157 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 12:24:47,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 12:24:47,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 12:24:47,161 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:24:47" (1/1) ... [2021-11-23 12:24:47,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55cee31c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:24:47, skipping insertion in model container [2021-11-23 12:24:47,163 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:24:47" (1/1) ... [2021-11-23 12:24:47,170 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 12:24:47,270 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 12:24:47,792 WARN L230 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_2808af96-6a00-4aa9-8724-540827c7db91/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i[33022,33035] [2021-11-23 12:24:48,187 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:24:48,208 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-23 12:24:48,222 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 12:24:48,239 WARN L230 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_2808af96-6a00-4aa9-8724-540827c7db91/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i[33022,33035] [2021-11-23 12:24:48,391 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:24:48,399 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 12:24:48,426 WARN L230 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_2808af96-6a00-4aa9-8724-540827c7db91/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i[33022,33035] [2021-11-23 12:24:48,544 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:24:48,626 INFO L208 MainTranslator]: Completed translation [2021-11-23 12:24:48,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:24:48 WrapperNode [2021-11-23 12:24:48,627 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 12:24:48,628 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 12:24:48,629 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 12:24:48,629 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 12:24:48,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:24:48" (1/1) ... [2021-11-23 12:24:48,715 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:24:48" (1/1) ... [2021-11-23 12:24:48,833 INFO L137 Inliner]: procedures = 180, calls = 575, calls flagged for inlining = 16, calls inlined = 28, statements flattened = 2518 [2021-11-23 12:24:48,834 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 12:24:48,834 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 12:24:48,835 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 12:24:48,835 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 12:24:48,844 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:24:48" (1/1) ... [2021-11-23 12:24:48,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:24:48" (1/1) ... [2021-11-23 12:24:48,860 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:24:48" (1/1) ... [2021-11-23 12:24:48,860 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:24:48" (1/1) ... [2021-11-23 12:24:49,025 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:24:48" (1/1) ... [2021-11-23 12:24:49,068 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:24:48" (1/1) ... [2021-11-23 12:24:49,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:24:48" (1/1) ... [2021-11-23 12:24:49,107 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 12:24:49,108 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 12:24:49,108 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 12:24:49,108 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 12:24:49,109 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:24:48" (1/1) ... [2021-11-23 12:24:49,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:24:49,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:24:49,146 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 12:24:49,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 12:24:49,204 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-23 12:24:49,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 12:24:49,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 12:24:49,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 12:24:49,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 12:24:49,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 12:24:49,208 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-23 12:24:49,209 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 12:24:49,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 12:24:49,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 12:24:49,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 12:24:49,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 12:24:49,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 12:24:49,585 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 12:24:49,587 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 12:25:01,526 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 12:25:01,548 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 12:25:01,549 INFO L301 CfgBuilder]: Removed 160 assume(true) statements. [2021-11-23 12:25:01,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:25:01 BoogieIcfgContainer [2021-11-23 12:25:01,555 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 12:25:01,557 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 12:25:01,558 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 12:25:01,561 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 12:25:01,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:24:47" (1/3) ... [2021-11-23 12:25:01,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cf779ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:25:01, skipping insertion in model container [2021-11-23 12:25:01,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:24:48" (2/3) ... [2021-11-23 12:25:01,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cf779ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:25:01, skipping insertion in model container [2021-11-23 12:25:01,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:25:01" (3/3) ... [2021-11-23 12:25:01,565 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test10-2.i [2021-11-23 12:25:01,571 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 12:25:01,571 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1110 error locations. [2021-11-23 12:25:01,623 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 12:25:01,631 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-11-23 12:25:01,631 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1110 error locations. [2021-11-23 12:25:01,705 INFO L276 IsEmpty]: Start isEmpty. Operand has 2338 states, 1227 states have (on average 2.1833740831295843) internal successors, (2679), 2337 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:01,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-23 12:25:01,712 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:25:01,712 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-23 12:25:01,713 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 12:25:01,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:25:01,718 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-11-23 12:25:01,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:25:01,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1849893267] [2021-11-23 12:25:01,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:25:01,732 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:25:01,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:25:01,735 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:25:01,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 12:25:01,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:25:01,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 12:25:01,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:25:02,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:25:02,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:25:02,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:25:02,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:25:02,079 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:25:02,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1849893267] [2021-11-23 12:25:02,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1849893267] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:25:02,080 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:25:02,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-23 12:25:02,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467622547] [2021-11-23 12:25:02,083 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:25:02,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:25:02,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:25:02,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:25:02,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:25:02,145 INFO L87 Difference]: Start difference. First operand has 2338 states, 1227 states have (on average 2.1833740831295843) internal successors, (2679), 2337 states have internal predecessors, (2679), 0 states have call successors, (0), 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 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:07,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:25:07,144 INFO L93 Difference]: Finished difference Result 3022 states and 3214 transitions. [2021-11-23 12:25:07,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:25:07,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-11-23 12:25:07,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:25:07,195 INFO L225 Difference]: With dead ends: 3022 [2021-11-23 12:25:07,196 INFO L226 Difference]: Without dead ends: 3020 [2021-11-23 12:25:07,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:25:07,202 INFO L933 BasicCegarLoop]: 1464 mSDtfsCounter, 2276 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 1479 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2276 SdHoareTripleChecker+Valid, 1917 SdHoareTripleChecker+Invalid, 1502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-23 12:25:07,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2276 Valid, 1917 Invalid, 1502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1479 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-11-23 12:25:07,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3020 states. [2021-11-23 12:25:07,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3020 to 2486. [2021-11-23 12:25:07,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 1399 states have (on average 2.0207290922087204) internal successors, (2827), 2485 states have internal predecessors, (2827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:07,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 2827 transitions. [2021-11-23 12:25:07,394 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 2827 transitions. Word has length 3 [2021-11-23 12:25:07,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:25:07,395 INFO L470 AbstractCegarLoop]: Abstraction has 2486 states and 2827 transitions. [2021-11-23 12:25:07,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:07,395 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 2827 transitions. [2021-11-23 12:25:07,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-23 12:25:07,396 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:25:07,396 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-23 12:25:07,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 12:25:07,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:25:07,608 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 12:25:07,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:25:07,609 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-11-23 12:25:07,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:25:07,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [438754502] [2021-11-23 12:25:07,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:25:07,611 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:25:07,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:25:07,612 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:25:07,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 12:25:07,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:25:07,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:25:07,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:25:07,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:25:07,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:25:07,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:25:07,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:25:07,904 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:25:07,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [438754502] [2021-11-23 12:25:07,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [438754502] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:25:07,905 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:25:07,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-23 12:25:07,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635464721] [2021-11-23 12:25:07,906 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:25:07,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:25:07,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:25:07,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:25:07,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:25:07,909 INFO L87 Difference]: Start difference. First operand 2486 states and 2827 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:19,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:25:19,042 INFO L93 Difference]: Finished difference Result 3870 states and 4334 transitions. [2021-11-23 12:25:19,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:25:19,043 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 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 3 [2021-11-23 12:25:19,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:25:19,064 INFO L225 Difference]: With dead ends: 3870 [2021-11-23 12:25:19,065 INFO L226 Difference]: Without dead ends: 3870 [2021-11-23 12:25:19,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:25:19,067 INFO L933 BasicCegarLoop]: 1763 mSDtfsCounter, 2878 mSDsluCounter, 1910 mSDsCounter, 0 mSdLazyCounter, 2311 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2878 SdHoareTripleChecker+Valid, 3673 SdHoareTripleChecker+Invalid, 2334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:25:19,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2878 Valid, 3673 Invalid, 2334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2311 Invalid, 0 Unknown, 0 Unchecked, 11.0s Time] [2021-11-23 12:25:19,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3870 states. [2021-11-23 12:25:19,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3870 to 2650. [2021-11-23 12:25:19,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2650 states, 1575 states have (on average 2.012063492063492) internal successors, (3169), 2649 states have internal predecessors, (3169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:19,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2650 states to 2650 states and 3169 transitions. [2021-11-23 12:25:19,138 INFO L78 Accepts]: Start accepts. Automaton has 2650 states and 3169 transitions. Word has length 3 [2021-11-23 12:25:19,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:25:19,139 INFO L470 AbstractCegarLoop]: Abstraction has 2650 states and 3169 transitions. [2021-11-23 12:25:19,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:19,139 INFO L276 IsEmpty]: Start isEmpty. Operand 2650 states and 3169 transitions. [2021-11-23 12:25:19,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 12:25:19,140 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:25:19,140 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:25:19,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 12:25:19,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:25:19,353 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 12:25:19,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:25:19,353 INFO L85 PathProgramCache]: Analyzing trace with hash 62249618, now seen corresponding path program 1 times [2021-11-23 12:25:19,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:25:19,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1922848532] [2021-11-23 12:25:19,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:25:19,355 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:25:19,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:25:19,356 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:25:19,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 12:25:19,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:25:19,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 12:25:19,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:25:19,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:25:19,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:25:19,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:25:19,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:25:19,597 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:25:19,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1922848532] [2021-11-23 12:25:19,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1922848532] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:25:19,598 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:25:19,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-23 12:25:19,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050048109] [2021-11-23 12:25:19,598 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:25:19,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:25:19,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:25:19,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:25:19,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:25:19,600 INFO L87 Difference]: Start difference. First operand 2650 states and 3169 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:23,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:25:23,370 INFO L93 Difference]: Finished difference Result 3472 states and 4003 transitions. [2021-11-23 12:25:23,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:25:23,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-11-23 12:25:23,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:25:23,389 INFO L225 Difference]: With dead ends: 3472 [2021-11-23 12:25:23,389 INFO L226 Difference]: Without dead ends: 3472 [2021-11-23 12:25:23,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:25:23,391 INFO L933 BasicCegarLoop]: 2330 mSDtfsCounter, 2121 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 1482 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2121 SdHoareTripleChecker+Valid, 3146 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-23 12:25:23,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2121 Valid, 3146 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1482 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-11-23 12:25:23,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3472 states. [2021-11-23 12:25:23,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3472 to 2559. [2021-11-23 12:25:23,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2559 states, 1575 states have (on average 1.9326984126984128) internal successors, (3044), 2558 states have internal predecessors, (3044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:23,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2559 states to 2559 states and 3044 transitions. [2021-11-23 12:25:23,455 INFO L78 Accepts]: Start accepts. Automaton has 2559 states and 3044 transitions. Word has length 8 [2021-11-23 12:25:23,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:25:23,456 INFO L470 AbstractCegarLoop]: Abstraction has 2559 states and 3044 transitions. [2021-11-23 12:25:23,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:23,456 INFO L276 IsEmpty]: Start isEmpty. Operand 2559 states and 3044 transitions. [2021-11-23 12:25:23,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 12:25:23,457 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:25:23,457 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:25:23,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 12:25:23,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:25:23,669 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 12:25:23,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:25:23,670 INFO L85 PathProgramCache]: Analyzing trace with hash 62249619, now seen corresponding path program 1 times [2021-11-23 12:25:23,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:25:23,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [89219942] [2021-11-23 12:25:23,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:25:23,673 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:25:23,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:25:23,674 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:25:23,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 12:25:23,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:25:23,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:25:23,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:25:23,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:25:23,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:25:23,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:25:24,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:25:24,037 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:25:24,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [89219942] [2021-11-23 12:25:24,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [89219942] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:25:24,038 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:25:24,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-23 12:25:24,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654016599] [2021-11-23 12:25:24,038 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:25:24,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:25:24,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:25:24,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:25:24,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:25:24,040 INFO L87 Difference]: Start difference. First operand 2559 states and 3044 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:34,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:25:34,083 INFO L93 Difference]: Finished difference Result 3601 states and 4034 transitions. [2021-11-23 12:25:34,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:25:34,083 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 8 [2021-11-23 12:25:34,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:25:34,099 INFO L225 Difference]: With dead ends: 3601 [2021-11-23 12:25:34,100 INFO L226 Difference]: Without dead ends: 3601 [2021-11-23 12:25:34,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:25:34,101 INFO L933 BasicCegarLoop]: 2669 mSDtfsCounter, 1555 mSDsluCounter, 2326 mSDsCounter, 0 mSdLazyCounter, 2589 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1555 SdHoareTripleChecker+Valid, 4995 SdHoareTripleChecker+Invalid, 2616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2021-11-23 12:25:34,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1555 Valid, 4995 Invalid, 2616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 2589 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time] [2021-11-23 12:25:34,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3601 states. [2021-11-23 12:25:34,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3601 to 2551. [2021-11-23 12:25:34,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2551 states, 1577 states have (on average 1.917564996829423) internal successors, (3024), 2550 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:34,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2551 states to 2551 states and 3024 transitions. [2021-11-23 12:25:34,183 INFO L78 Accepts]: Start accepts. Automaton has 2551 states and 3024 transitions. Word has length 8 [2021-11-23 12:25:34,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:25:34,187 INFO L470 AbstractCegarLoop]: Abstraction has 2551 states and 3024 transitions. [2021-11-23 12:25:34,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:34,188 INFO L276 IsEmpty]: Start isEmpty. Operand 2551 states and 3024 transitions. [2021-11-23 12:25:34,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 12:25:34,189 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:25:34,190 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:25:34,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 12:25:34,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:25:34,401 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr658REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 12:25:34,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:25:34,407 INFO L85 PathProgramCache]: Analyzing trace with hash 175289392, now seen corresponding path program 1 times [2021-11-23 12:25:34,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:25:34,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1482190032] [2021-11-23 12:25:34,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:25:34,409 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:25:34,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:25:34,411 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:25:34,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 12:25:34,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:25:34,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 12:25:34,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:25:34,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:25:34,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:25:34,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:25:34,665 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:25:34,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1482190032] [2021-11-23 12:25:34,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1482190032] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:25:34,666 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:25:34,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-23 12:25:34,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393782332] [2021-11-23 12:25:34,667 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:25:34,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:25:34,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:25:34,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:25:34,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:25:34,669 INFO L87 Difference]: Start difference. First operand 2551 states and 3024 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:34,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:25:34,716 INFO L93 Difference]: Finished difference Result 2509 states and 2981 transitions. [2021-11-23 12:25:34,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:25:34,718 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 12:25:34,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:25:34,730 INFO L225 Difference]: With dead ends: 2509 [2021-11-23 12:25:34,731 INFO L226 Difference]: Without dead ends: 2509 [2021-11-23 12:25:34,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:25:34,733 INFO L933 BasicCegarLoop]: 2295 mSDtfsCounter, 1110 mSDsluCounter, 2390 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1110 SdHoareTripleChecker+Valid, 4685 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:25:34,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1110 Valid, 4685 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:25:34,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2021-11-23 12:25:34,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 2509. [2021-11-23 12:25:34,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2509 states, 1559 states have (on average 1.912123155869147) internal successors, (2981), 2508 states have internal predecessors, (2981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:34,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2509 states to 2509 states and 2981 transitions. [2021-11-23 12:25:34,786 INFO L78 Accepts]: Start accepts. Automaton has 2509 states and 2981 transitions. Word has length 11 [2021-11-23 12:25:34,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:25:34,787 INFO L470 AbstractCegarLoop]: Abstraction has 2509 states and 2981 transitions. [2021-11-23 12:25:34,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:34,787 INFO L276 IsEmpty]: Start isEmpty. Operand 2509 states and 2981 transitions. [2021-11-23 12:25:34,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 12:25:34,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:25:34,788 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:25:34,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-23 12:25:34,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:25:34,999 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr682REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 12:25:35,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:25:35,000 INFO L85 PathProgramCache]: Analyzing trace with hash 949435626, now seen corresponding path program 1 times [2021-11-23 12:25:35,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:25:35,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [160177589] [2021-11-23 12:25:35,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:25:35,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:25:35,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:25:35,002 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:25:35,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 12:25:35,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:25:35,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:25:35,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:25:35,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:25:35,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:25:35,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:25:35,288 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:25:35,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [160177589] [2021-11-23 12:25:35,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [160177589] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:25:35,289 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:25:35,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-23 12:25:35,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281120145] [2021-11-23 12:25:35,289 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:25:35,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:25:35,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:25:35,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:25:35,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:25:35,291 INFO L87 Difference]: Start difference. First operand 2509 states and 2981 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:35,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:25:35,402 INFO L93 Difference]: Finished difference Result 2488 states and 2953 transitions. [2021-11-23 12:25:35,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:25:35,403 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-23 12:25:35,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:25:35,414 INFO L225 Difference]: With dead ends: 2488 [2021-11-23 12:25:35,415 INFO L226 Difference]: Without dead ends: 2488 [2021-11-23 12:25:35,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:25:35,417 INFO L933 BasicCegarLoop]: 2250 mSDtfsCounter, 2152 mSDsluCounter, 3438 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2152 SdHoareTripleChecker+Valid, 5688 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:25:35,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2152 Valid, 5688 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:25:35,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2488 states. [2021-11-23 12:25:35,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2488 to 2487. [2021-11-23 12:25:35,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 1551 states have (on average 1.9032882011605416) internal successors, (2952), 2486 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:35,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 2952 transitions. [2021-11-23 12:25:35,466 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 2952 transitions. Word has length 13 [2021-11-23 12:25:35,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:25:35,466 INFO L470 AbstractCegarLoop]: Abstraction has 2487 states and 2952 transitions. [2021-11-23 12:25:35,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:35,467 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 2952 transitions. [2021-11-23 12:25:35,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 12:25:35,468 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:25:35,469 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:25:35,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 12:25:35,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:25:35,680 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr334REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 12:25:35,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:25:35,681 INFO L85 PathProgramCache]: Analyzing trace with hash 270217471, now seen corresponding path program 1 times [2021-11-23 12:25:35,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:25:35,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [144813678] [2021-11-23 12:25:35,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:25:35,681 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:25:35,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:25:35,682 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:25:35,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 12:25:35,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:25:35,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 12:25:35,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:25:35,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:25:35,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:25:35,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:25:35,972 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:25:35,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [144813678] [2021-11-23 12:25:35,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [144813678] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:25:35,973 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:25:35,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-23 12:25:35,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489370509] [2021-11-23 12:25:35,973 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:25:35,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:25:35,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:25:35,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:25:35,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:25:35,975 INFO L87 Difference]: Start difference. First operand 2487 states and 2952 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:36,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:25:36,063 INFO L93 Difference]: Finished difference Result 4013 states and 4586 transitions. [2021-11-23 12:25:36,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:25:36,064 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-23 12:25:36,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:25:36,083 INFO L225 Difference]: With dead ends: 4013 [2021-11-23 12:25:36,084 INFO L226 Difference]: Without dead ends: 4013 [2021-11-23 12:25:36,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:25:36,085 INFO L933 BasicCegarLoop]: 3893 mSDtfsCounter, 4450 mSDsluCounter, 1677 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4450 SdHoareTripleChecker+Valid, 5570 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:25:36,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4450 Valid, 5570 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:25:36,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4013 states. [2021-11-23 12:25:36,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4013 to 2409. [2021-11-23 12:25:36,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2409 states, 1497 states have (on average 1.8857715430861723) internal successors, (2823), 2408 states have internal predecessors, (2823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:36,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 2823 transitions. [2021-11-23 12:25:36,144 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 2823 transitions. Word has length 20 [2021-11-23 12:25:36,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:25:36,144 INFO L470 AbstractCegarLoop]: Abstraction has 2409 states and 2823 transitions. [2021-11-23 12:25:36,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:36,145 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 2823 transitions. [2021-11-23 12:25:36,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 12:25:36,146 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:25:36,146 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:25:36,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 12:25:36,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:25:36,360 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 12:25:36,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:25:36,360 INFO L85 PathProgramCache]: Analyzing trace with hash -673839521, now seen corresponding path program 1 times [2021-11-23 12:25:36,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:25:36,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [462429630] [2021-11-23 12:25:36,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:25:36,361 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:25:36,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:25:36,362 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:25:36,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 12:25:36,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:25:36,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 12:25:36,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:25:36,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:25:36,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:25:36,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:25:36,614 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:25:36,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [462429630] [2021-11-23 12:25:36,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [462429630] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:25:36,615 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:25:36,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-23 12:25:36,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194735391] [2021-11-23 12:25:36,615 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:25:36,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:25:36,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:25:36,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:25:36,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:25:36,617 INFO L87 Difference]: Start difference. First operand 2409 states and 2823 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:36,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:25:36,682 INFO L93 Difference]: Finished difference Result 3936 states and 4509 transitions. [2021-11-23 12:25:36,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:25:36,682 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-23 12:25:36,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:25:36,707 INFO L225 Difference]: With dead ends: 3936 [2021-11-23 12:25:36,708 INFO L226 Difference]: Without dead ends: 3936 [2021-11-23 12:25:36,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:25:36,710 INFO L933 BasicCegarLoop]: 3814 mSDtfsCounter, 4364 mSDsluCounter, 1641 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4364 SdHoareTripleChecker+Valid, 5455 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:25:36,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4364 Valid, 5455 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:25:36,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3936 states. [2021-11-23 12:25:36,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3936 to 2367. [2021-11-23 12:25:36,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2367 states, 1479 states have (on average 1.8796484110885734) internal successors, (2780), 2366 states have internal predecessors, (2780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:36,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2367 states to 2367 states and 2780 transitions. [2021-11-23 12:25:36,766 INFO L78 Accepts]: Start accepts. Automaton has 2367 states and 2780 transitions. Word has length 20 [2021-11-23 12:25:36,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:25:36,767 INFO L470 AbstractCegarLoop]: Abstraction has 2367 states and 2780 transitions. [2021-11-23 12:25:36,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:36,767 INFO L276 IsEmpty]: Start isEmpty. Operand 2367 states and 2780 transitions. [2021-11-23 12:25:36,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 12:25:36,768 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:25:36,768 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:25:36,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 12:25:36,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:25:36,983 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr358REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 12:25:36,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:25:36,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1980977049, now seen corresponding path program 1 times [2021-11-23 12:25:36,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:25:36,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693578197] [2021-11-23 12:25:36,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:25:36,984 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:25:36,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:25:36,985 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:25:36,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 12:25:37,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:25:37,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:25:37,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:25:37,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:25:37,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:25:37,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:25:37,276 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:25:37,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693578197] [2021-11-23 12:25:37,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [693578197] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:25:37,277 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:25:37,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-23 12:25:37,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543980285] [2021-11-23 12:25:37,278 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:25:37,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:25:37,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:25:37,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:25:37,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:25:37,280 INFO L87 Difference]: Start difference. First operand 2367 states and 2780 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:37,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:25:37,417 INFO L93 Difference]: Finished difference Result 3894 states and 4416 transitions. [2021-11-23 12:25:37,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:25:37,418 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-23 12:25:37,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:25:37,440 INFO L225 Difference]: With dead ends: 3894 [2021-11-23 12:25:37,441 INFO L226 Difference]: Without dead ends: 3894 [2021-11-23 12:25:37,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:25:37,443 INFO L933 BasicCegarLoop]: 3762 mSDtfsCounter, 2153 mSDsluCounter, 7023 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2153 SdHoareTripleChecker+Valid, 10785 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:25:37,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2153 Valid, 10785 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:25:37,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3894 states. [2021-11-23 12:25:37,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3894 to 2329. [2021-11-23 12:25:37,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2329 states, 1455 states have (on average 1.8508591065292097) internal successors, (2693), 2328 states have internal predecessors, (2693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:37,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2329 states to 2329 states and 2693 transitions. [2021-11-23 12:25:37,494 INFO L78 Accepts]: Start accepts. Automaton has 2329 states and 2693 transitions. Word has length 22 [2021-11-23 12:25:37,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:25:37,495 INFO L470 AbstractCegarLoop]: Abstraction has 2329 states and 2693 transitions. [2021-11-23 12:25:37,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:37,495 INFO L276 IsEmpty]: Start isEmpty. Operand 2329 states and 2693 transitions. [2021-11-23 12:25:37,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 12:25:37,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:25:37,500 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:25:37,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 12:25:37,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:25:37,712 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 12:25:37,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:25:37,712 INFO L85 PathProgramCache]: Analyzing trace with hash 980278297, now seen corresponding path program 1 times [2021-11-23 12:25:37,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:25:37,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [150338616] [2021-11-23 12:25:37,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:25:37,713 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:25:37,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:25:37,714 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:25:37,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 12:25:37,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:25:37,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:25:37,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:25:37,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:25:37,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:25:37,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:25:37,986 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:25:37,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [150338616] [2021-11-23 12:25:37,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [150338616] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:25:37,986 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:25:37,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-23 12:25:37,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827557160] [2021-11-23 12:25:37,987 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:25:37,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:25:37,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:25:37,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:25:37,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:25:37,988 INFO L87 Difference]: Start difference. First operand 2329 states and 2693 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:38,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:25:38,080 INFO L93 Difference]: Finished difference Result 3855 states and 4365 transitions. [2021-11-23 12:25:38,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:25:38,081 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-23 12:25:38,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:25:38,089 INFO L225 Difference]: With dead ends: 3855 [2021-11-23 12:25:38,089 INFO L226 Difference]: Without dead ends: 3855 [2021-11-23 12:25:38,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:25:38,090 INFO L933 BasicCegarLoop]: 3699 mSDtfsCounter, 2118 mSDsluCounter, 6904 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2118 SdHoareTripleChecker+Valid, 10603 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:25:38,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2118 Valid, 10603 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:25:38,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3855 states. [2021-11-23 12:25:38,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3855 to 2307. [2021-11-23 12:25:38,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2307 states, 1447 states have (on average 1.8410504492052522) internal successors, (2664), 2306 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:38,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2307 states to 2307 states and 2664 transitions. [2021-11-23 12:25:38,142 INFO L78 Accepts]: Start accepts. Automaton has 2307 states and 2664 transitions. Word has length 22 [2021-11-23 12:25:38,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:25:38,142 INFO L470 AbstractCegarLoop]: Abstraction has 2307 states and 2664 transitions. [2021-11-23 12:25:38,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:38,143 INFO L276 IsEmpty]: Start isEmpty. Operand 2307 states and 2664 transitions. [2021-11-23 12:25:38,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 12:25:38,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:25:38,144 INFO L514 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] [2021-11-23 12:25:38,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 12:25:38,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:25:38,356 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr696REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 12:25:38,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:25:38,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1893283832, now seen corresponding path program 1 times [2021-11-23 12:25:38,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:25:38,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1396572969] [2021-11-23 12:25:38,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:25:38,357 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:25:38,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:25:38,358 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:25:38,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 12:25:38,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:25:38,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:25:38,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:25:38,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:25:38,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:25:38,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:25:38,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:25:38,720 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:25:38,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1396572969] [2021-11-23 12:25:38,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1396572969] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:25:38,721 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:25:38,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-23 12:25:38,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173252975] [2021-11-23 12:25:38,721 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:25:38,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:25:38,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:25:38,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:25:38,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:25:38,723 INFO L87 Difference]: Start difference. First operand 2307 states and 2664 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:42,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:25:42,657 INFO L93 Difference]: Finished difference Result 2762 states and 3030 transitions. [2021-11-23 12:25:42,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:25:42,657 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-23 12:25:42,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:25:42,663 INFO L225 Difference]: With dead ends: 2762 [2021-11-23 12:25:42,663 INFO L226 Difference]: Without dead ends: 2762 [2021-11-23 12:25:42,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:25:42,664 INFO L933 BasicCegarLoop]: 1313 mSDtfsCounter, 2967 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 1781 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2967 SdHoareTripleChecker+Valid, 2375 SdHoareTripleChecker+Invalid, 1794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-23 12:25:42,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2967 Valid, 2375 Invalid, 1794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1781 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-11-23 12:25:42,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2762 states. [2021-11-23 12:25:42,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2762 to 2303. [2021-11-23 12:25:42,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2303 states, 1447 states have (on average 1.8382861091914307) internal successors, (2660), 2302 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:42,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 2660 transitions. [2021-11-23 12:25:42,705 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 2660 transitions. Word has length 27 [2021-11-23 12:25:42,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:25:42,705 INFO L470 AbstractCegarLoop]: Abstraction has 2303 states and 2660 transitions. [2021-11-23 12:25:42,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:42,706 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 2660 transitions. [2021-11-23 12:25:42,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 12:25:42,707 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:25:42,707 INFO L514 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] [2021-11-23 12:25:42,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 12:25:42,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:25:42,918 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr697REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 12:25:42,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:25:42,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1893283833, now seen corresponding path program 1 times [2021-11-23 12:25:42,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:25:42,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2017007311] [2021-11-23 12:25:42,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:25:42,919 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:25:42,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:25:42,920 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:25:42,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 12:25:43,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:25:43,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 12:25:43,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:25:43,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:25:43,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:25:43,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:25:43,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:25:43,817 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:25:43,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2017007311] [2021-11-23 12:25:43,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2017007311] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:25:43,818 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:25:43,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-23 12:25:43,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571323394] [2021-11-23 12:25:43,819 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:25:43,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 12:25:43,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:25:43,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 12:25:43,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:25:43,820 INFO L87 Difference]: Start difference. First operand 2303 states and 2660 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:57,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:25:57,452 INFO L93 Difference]: Finished difference Result 3384 states and 3739 transitions. [2021-11-23 12:25:57,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 12:25:57,453 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-23 12:25:57,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:25:57,459 INFO L225 Difference]: With dead ends: 3384 [2021-11-23 12:25:57,460 INFO L226 Difference]: Without dead ends: 3384 [2021-11-23 12:25:57,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:25:57,461 INFO L933 BasicCegarLoop]: 1562 mSDtfsCounter, 5661 mSDsluCounter, 2946 mSDsCounter, 0 mSdLazyCounter, 3113 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5661 SdHoareTripleChecker+Valid, 4508 SdHoareTripleChecker+Invalid, 3121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 3113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.4s IncrementalHoareTripleChecker+Time [2021-11-23 12:25:57,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5661 Valid, 4508 Invalid, 3121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 3113 Invalid, 0 Unknown, 0 Unchecked, 13.4s Time] [2021-11-23 12:25:57,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3384 states. [2021-11-23 12:25:57,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3384 to 2336. [2021-11-23 12:25:57,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2336 states, 1481 states have (on average 1.8210668467251856) internal successors, (2697), 2335 states have internal predecessors, (2697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:57,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2336 states to 2336 states and 2697 transitions. [2021-11-23 12:25:57,525 INFO L78 Accepts]: Start accepts. Automaton has 2336 states and 2697 transitions. Word has length 27 [2021-11-23 12:25:57,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:25:57,525 INFO L470 AbstractCegarLoop]: Abstraction has 2336 states and 2697 transitions. [2021-11-23 12:25:57,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:57,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2336 states and 2697 transitions. [2021-11-23 12:25:57,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 12:25:57,530 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:25:57,530 INFO L514 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] [2021-11-23 12:25:57,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-23 12:25:57,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:25:57,742 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr372REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 12:25:57,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:25:57,743 INFO L85 PathProgramCache]: Analyzing trace with hash 187122631, now seen corresponding path program 1 times [2021-11-23 12:25:57,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:25:57,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1943190758] [2021-11-23 12:25:57,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:25:57,744 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:25:57,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:25:57,744 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:25:57,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 12:25:57,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:25:57,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:25:57,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:25:57,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:25:58,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:25:58,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:25:58,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:25:58,170 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:25:58,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1943190758] [2021-11-23 12:25:58,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1943190758] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:25:58,170 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:25:58,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-23 12:25:58,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909574552] [2021-11-23 12:25:58,171 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:25:58,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:25:58,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:25:58,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:25:58,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:25:58,172 INFO L87 Difference]: Start difference. First operand 2336 states and 2697 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:26:04,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:26:04,892 INFO L93 Difference]: Finished difference Result 4978 states and 5574 transitions. [2021-11-23 12:26:04,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:26:04,893 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-23 12:26:04,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:26:04,903 INFO L225 Difference]: With dead ends: 4978 [2021-11-23 12:26:04,903 INFO L226 Difference]: Without dead ends: 4978 [2021-11-23 12:26:04,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:26:04,904 INFO L933 BasicCegarLoop]: 2423 mSDtfsCounter, 5056 mSDsluCounter, 2558 mSDsCounter, 0 mSdLazyCounter, 2969 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5056 SdHoareTripleChecker+Valid, 4981 SdHoareTripleChecker+Invalid, 3000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-11-23 12:26:04,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5056 Valid, 4981 Invalid, 3000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2969 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2021-11-23 12:26:04,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4978 states. [2021-11-23 12:26:04,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4978 to 2333. [2021-11-23 12:26:04,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2333 states, 1481 states have (on average 1.813639432815665) internal successors, (2686), 2332 states have internal predecessors, (2686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:26:04,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2333 states to 2333 states and 2686 transitions. [2021-11-23 12:26:04,951 INFO L78 Accepts]: Start accepts. Automaton has 2333 states and 2686 transitions. Word has length 36 [2021-11-23 12:26:04,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:26:04,952 INFO L470 AbstractCegarLoop]: Abstraction has 2333 states and 2686 transitions. [2021-11-23 12:26:04,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:26:04,952 INFO L276 IsEmpty]: Start isEmpty. Operand 2333 states and 2686 transitions. [2021-11-23 12:26:04,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 12:26:04,953 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:26:04,953 INFO L514 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] [2021-11-23 12:26:04,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-23 12:26:05,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:26:05,166 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr373REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 12:26:05,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:26:05,166 INFO L85 PathProgramCache]: Analyzing trace with hash 187122632, now seen corresponding path program 1 times [2021-11-23 12:26:05,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:26:05,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [303774182] [2021-11-23 12:26:05,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:26:05,168 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:26:05,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:26:05,170 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:26:05,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 12:26:05,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:26:05,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 12:26:05,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:26:05,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:26:05,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:26:05,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:26:06,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:26:06,267 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:26:06,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [303774182] [2021-11-23 12:26:06,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [303774182] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:26:06,268 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:26:06,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-23 12:26:06,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044644661] [2021-11-23 12:26:06,269 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:26:06,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 12:26:06,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:26:06,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 12:26:06,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:26:06,288 INFO L87 Difference]: Start difference. First operand 2333 states and 2686 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:26:27,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:26:27,750 INFO L93 Difference]: Finished difference Result 4911 states and 5447 transitions. [2021-11-23 12:26:27,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 12:26:27,752 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-23 12:26:27,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:26:27,758 INFO L225 Difference]: With dead ends: 4911 [2021-11-23 12:26:27,758 INFO L226 Difference]: Without dead ends: 4911 [2021-11-23 12:26:27,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:26:27,759 INFO L933 BasicCegarLoop]: 2695 mSDtfsCounter, 6657 mSDsluCounter, 3829 mSDsCounter, 0 mSdLazyCounter, 3679 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6657 SdHoareTripleChecker+Valid, 6524 SdHoareTripleChecker+Invalid, 3693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 3679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:26:27,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6657 Valid, 6524 Invalid, 3693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 3679 Invalid, 0 Unknown, 0 Unchecked, 21.2s Time] [2021-11-23 12:26:27,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4911 states. [2021-11-23 12:26:27,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4911 to 2333. [2021-11-23 12:26:27,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2333 states, 1481 states have (on average 1.810938555030385) internal successors, (2682), 2332 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:26:27,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2333 states to 2333 states and 2682 transitions. [2021-11-23 12:26:27,803 INFO L78 Accepts]: Start accepts. Automaton has 2333 states and 2682 transitions. Word has length 36 [2021-11-23 12:26:27,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:26:27,803 INFO L470 AbstractCegarLoop]: Abstraction has 2333 states and 2682 transitions. [2021-11-23 12:26:27,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:26:27,803 INFO L276 IsEmpty]: Start isEmpty. Operand 2333 states and 2682 transitions. [2021-11-23 12:26:27,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 12:26:27,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:26:27,804 INFO L514 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] [2021-11-23 12:26:27,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 12:26:28,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:26:28,027 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr54REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 12:26:28,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:26:28,027 INFO L85 PathProgramCache]: Analyzing trace with hash -773066201, now seen corresponding path program 1 times [2021-11-23 12:26:28,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:26:28,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2051613652] [2021-11-23 12:26:28,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:26:28,028 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:26:28,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:26:28,028 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:26:28,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 12:26:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:26:28,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:26:28,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:26:28,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:26:28,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:26:28,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:26:28,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:26:28,467 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:26:28,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2051613652] [2021-11-23 12:26:28,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2051613652] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:26:28,467 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:26:28,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-23 12:26:28,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615724805] [2021-11-23 12:26:28,468 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:26:28,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:26:28,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:26:28,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:26:28,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:26:28,469 INFO L87 Difference]: Start difference. First operand 2333 states and 2682 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:26:34,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:26:34,231 INFO L93 Difference]: Finished difference Result 4582 states and 5154 transitions. [2021-11-23 12:26:34,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:26:34,232 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-23 12:26:34,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:26:34,235 INFO L225 Difference]: With dead ends: 4582 [2021-11-23 12:26:34,236 INFO L226 Difference]: Without dead ends: 4582 [2021-11-23 12:26:34,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:26:34,237 INFO L933 BasicCegarLoop]: 3003 mSDtfsCounter, 3773 mSDsluCounter, 2356 mSDsCounter, 0 mSdLazyCounter, 3012 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3773 SdHoareTripleChecker+Valid, 5359 SdHoareTripleChecker+Invalid, 3035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 3012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-23 12:26:34,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3773 Valid, 5359 Invalid, 3035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 3012 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-11-23 12:26:34,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4582 states. [2021-11-23 12:26:34,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4582 to 2329. [2021-11-23 12:26:34,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2329 states, 1481 states have (on average 1.8082376772451048) internal successors, (2678), 2328 states have internal predecessors, (2678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:26:34,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2329 states to 2329 states and 2678 transitions. [2021-11-23 12:26:34,266 INFO L78 Accepts]: Start accepts. Automaton has 2329 states and 2678 transitions. Word has length 36 [2021-11-23 12:26:34,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:26:34,266 INFO L470 AbstractCegarLoop]: Abstraction has 2329 states and 2678 transitions. [2021-11-23 12:26:34,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:26:34,266 INFO L276 IsEmpty]: Start isEmpty. Operand 2329 states and 2678 transitions. [2021-11-23 12:26:34,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 12:26:34,267 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:26:34,267 INFO L514 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] [2021-11-23 12:26:34,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 12:26:34,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:26:34,468 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr55REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 12:26:34,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:26:34,468 INFO L85 PathProgramCache]: Analyzing trace with hash -773066200, now seen corresponding path program 1 times [2021-11-23 12:26:34,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:26:34,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [785912130] [2021-11-23 12:26:34,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:26:34,469 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:26:34,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:26:34,471 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:26:34,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 12:26:34,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:26:34,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 12:26:34,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:26:34,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:26:34,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:26:34,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:26:35,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:26:35,396 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:26:35,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [785912130] [2021-11-23 12:26:35,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [785912130] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:26:35,396 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:26:35,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-23 12:26:35,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578569648] [2021-11-23 12:26:35,397 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:26:35,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 12:26:35,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:26:35,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 12:26:35,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:26:35,398 INFO L87 Difference]: Start difference. First operand 2329 states and 2678 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:26:53,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:26:53,051 INFO L93 Difference]: Finished difference Result 4478 states and 4930 transitions. [2021-11-23 12:26:53,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 12:26:53,052 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-23 12:26:53,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:26:53,056 INFO L225 Difference]: With dead ends: 4478 [2021-11-23 12:26:53,056 INFO L226 Difference]: Without dead ends: 4478 [2021-11-23 12:26:53,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:26:53,057 INFO L933 BasicCegarLoop]: 3267 mSDtfsCounter, 2786 mSDsluCounter, 5746 mSDsCounter, 0 mSdLazyCounter, 5459 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2786 SdHoareTripleChecker+Valid, 9013 SdHoareTripleChecker+Invalid, 5471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 5459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.4s IncrementalHoareTripleChecker+Time [2021-11-23 12:26:53,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2786 Valid, 9013 Invalid, 5471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 5459 Invalid, 0 Unknown, 0 Unchecked, 17.4s Time] [2021-11-23 12:26:53,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4478 states. [2021-11-23 12:26:53,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4478 to 2325. [2021-11-23 12:26:53,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2325 states, 1481 states have (on average 1.8055367994598244) internal successors, (2674), 2324 states have internal predecessors, (2674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:26:53,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2325 states to 2325 states and 2674 transitions. [2021-11-23 12:26:53,096 INFO L78 Accepts]: Start accepts. Automaton has 2325 states and 2674 transitions. Word has length 36 [2021-11-23 12:26:53,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:26:53,096 INFO L470 AbstractCegarLoop]: Abstraction has 2325 states and 2674 transitions. [2021-11-23 12:26:53,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:26:53,097 INFO L276 IsEmpty]: Start isEmpty. Operand 2325 states and 2674 transitions. [2021-11-23 12:26:53,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-23 12:26:53,098 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:26:53,098 INFO L514 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] [2021-11-23 12:26:53,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 12:26:53,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:26:53,311 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 12:26:53,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:26:53,311 INFO L85 PathProgramCache]: Analyzing trace with hash -480226171, now seen corresponding path program 1 times [2021-11-23 12:26:53,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:26:53,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1558617610] [2021-11-23 12:26:53,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:26:53,312 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:26:53,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:26:53,313 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:26:53,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 12:26:53,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:26:53,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:26:53,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:26:53,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:26:53,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:26:53,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:26:53,694 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:26:53,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1558617610] [2021-11-23 12:26:53,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1558617610] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:26:53,694 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:26:53,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-23 12:26:53,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989399309] [2021-11-23 12:26:53,695 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:26:53,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:26:53,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:26:53,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:26:53,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:26:53,696 INFO L87 Difference]: Start difference. First operand 2325 states and 2674 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:26:53,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:26:53,761 INFO L93 Difference]: Finished difference Result 2319 states and 2660 transitions. [2021-11-23 12:26:53,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:26:53,762 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-23 12:26:53,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:26:53,764 INFO L225 Difference]: With dead ends: 2319 [2021-11-23 12:26:53,764 INFO L226 Difference]: Without dead ends: 2319 [2021-11-23 12:26:53,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:26:53,766 INFO L933 BasicCegarLoop]: 2080 mSDtfsCounter, 1063 mSDsluCounter, 3088 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1063 SdHoareTripleChecker+Valid, 5168 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:26:53,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1063 Valid, 5168 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:26:53,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2021-11-23 12:26:53,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 2319. [2021-11-23 12:26:53,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2319 states, 1475 states have (on average 1.8033898305084746) internal successors, (2660), 2318 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:26:53,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2319 states to 2319 states and 2660 transitions. [2021-11-23 12:26:53,797 INFO L78 Accepts]: Start accepts. Automaton has 2319 states and 2660 transitions. Word has length 40 [2021-11-23 12:26:53,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:26:53,797 INFO L470 AbstractCegarLoop]: Abstraction has 2319 states and 2660 transitions. [2021-11-23 12:26:53,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:26:53,797 INFO L276 IsEmpty]: Start isEmpty. Operand 2319 states and 2660 transitions. [2021-11-23 12:26:53,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-23 12:26:53,798 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:26:53,799 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:26:53,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-23 12:26:54,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:26:54,017 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 12:26:54,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:26:54,017 INFO L85 PathProgramCache]: Analyzing trace with hash -952585927, now seen corresponding path program 1 times [2021-11-23 12:26:54,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:26:54,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2013717289] [2021-11-23 12:26:54,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:26:54,018 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:26:54,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:26:54,019 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:26:54,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 12:26:54,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:26:54,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:26:54,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:26:54,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:26:54,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:26:54,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:26:54,864 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:26:54,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2013717289] [2021-11-23 12:26:54,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2013717289] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:26:54,865 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:26:54,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-23 12:26:54,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380357669] [2021-11-23 12:26:54,865 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:26:54,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:26:54,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:26:54,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:26:54,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:26:54,866 INFO L87 Difference]: Start difference. First operand 2319 states and 2660 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) [2021-11-23 12:26:55,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:26:55,200 INFO L93 Difference]: Finished difference Result 3752 states and 4231 transitions. [2021-11-23 12:26:55,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:26:55,201 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 48 [2021-11-23 12:26:55,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:26:55,204 INFO L225 Difference]: With dead ends: 3752 [2021-11-23 12:26:55,205 INFO L226 Difference]: Without dead ends: 3752 [2021-11-23 12:26:55,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:26:55,206 INFO L933 BasicCegarLoop]: 2162 mSDtfsCounter, 1507 mSDsluCounter, 1919 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1507 SdHoareTripleChecker+Valid, 4081 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:26:55,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1507 Valid, 4081 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 12:26:55,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3752 states. [2021-11-23 12:26:55,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3752 to 3099. [2021-11-23 12:26:55,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3099 states, 2255 states have (on average 1.7787139689578715) internal successors, (4011), 3098 states have internal predecessors, (4011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:26:55,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3099 states to 3099 states and 4011 transitions. [2021-11-23 12:26:55,256 INFO L78 Accepts]: Start accepts. Automaton has 3099 states and 4011 transitions. Word has length 48 [2021-11-23 12:26:55,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:26:55,256 INFO L470 AbstractCegarLoop]: Abstraction has 3099 states and 4011 transitions. [2021-11-23 12:26:55,256 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) [2021-11-23 12:26:55,256 INFO L276 IsEmpty]: Start isEmpty. Operand 3099 states and 4011 transitions. [2021-11-23 12:26:55,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-23 12:26:55,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:26:55,257 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:26:55,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-23 12:26:55,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:26:55,471 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 12:26:55,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:26:55,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1775606781, now seen corresponding path program 1 times [2021-11-23 12:26:55,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:26:55,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2051965012] [2021-11-23 12:26:55,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:26:55,472 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:26:55,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:26:55,473 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:26:55,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 12:26:55,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:26:55,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:26:55,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:26:55,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:26:55,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:26:55,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:26:55,855 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:26:55,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2051965012] [2021-11-23 12:26:55,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2051965012] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:26:55,855 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:26:55,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-23 12:26:55,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219357203] [2021-11-23 12:26:55,855 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:26:55,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:26:55,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:26:55,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:26:55,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:26:55,857 INFO L87 Difference]: Start difference. First operand 3099 states and 4011 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:26:55,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:26:55,915 INFO L93 Difference]: Finished difference Result 4342 states and 5332 transitions. [2021-11-23 12:26:55,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:26:55,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 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 [2021-11-23 12:26:55,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:26:55,920 INFO L225 Difference]: With dead ends: 4342 [2021-11-23 12:26:55,920 INFO L226 Difference]: Without dead ends: 4342 [2021-11-23 12:26:55,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:26:55,921 INFO L933 BasicCegarLoop]: 3460 mSDtfsCounter, 2087 mSDsluCounter, 4823 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2087 SdHoareTripleChecker+Valid, 8283 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:26:55,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2087 Valid, 8283 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:26:55,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4342 states. [2021-11-23 12:26:55,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4342 to 3075. [2021-11-23 12:26:55,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3075 states, 2231 states have (on average 1.77991931869117) internal successors, (3971), 3074 states have internal predecessors, (3971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:26:56,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3075 states to 3075 states and 3971 transitions. [2021-11-23 12:26:56,006 INFO L78 Accepts]: Start accepts. Automaton has 3075 states and 3971 transitions. Word has length 51 [2021-11-23 12:26:56,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:26:56,007 INFO L470 AbstractCegarLoop]: Abstraction has 3075 states and 3971 transitions. [2021-11-23 12:26:56,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:26:56,007 INFO L276 IsEmpty]: Start isEmpty. Operand 3075 states and 3971 transitions. [2021-11-23 12:26:56,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 12:26:56,007 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:26:56,007 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:26:56,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-23 12:26:56,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:26:56,208 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 12:26:56,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:26:56,208 INFO L85 PathProgramCache]: Analyzing trace with hash 732181606, now seen corresponding path program 1 times [2021-11-23 12:26:56,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:26:56,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2036539418] [2021-11-23 12:26:56,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:26:56,209 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:26:56,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:26:56,210 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:26:56,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-23 12:26:56,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:26:56,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:26:56,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:26:56,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:26:56,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:26:56,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:26:56,631 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:26:56,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2036539418] [2021-11-23 12:26:56,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2036539418] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:26:56,632 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:26:56,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-23 12:26:56,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399389121] [2021-11-23 12:26:56,632 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:26:56,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:26:56,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:26:56,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:26:56,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:26:56,633 INFO L87 Difference]: Start difference. First operand 3075 states and 3971 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 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) [2021-11-23 12:26:56,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:26:56,691 INFO L93 Difference]: Finished difference Result 4078 states and 4821 transitions. [2021-11-23 12:26:56,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:26:56,691 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 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 54 [2021-11-23 12:26:56,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:26:56,695 INFO L225 Difference]: With dead ends: 4078 [2021-11-23 12:26:56,695 INFO L226 Difference]: Without dead ends: 4078 [2021-11-23 12:26:56,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:26:56,696 INFO L933 BasicCegarLoop]: 3501 mSDtfsCounter, 2078 mSDsluCounter, 4914 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2078 SdHoareTripleChecker+Valid, 8415 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:26:56,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2078 Valid, 8415 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:26:56,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4078 states. [2021-11-23 12:26:56,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4078 to 3063. [2021-11-23 12:26:56,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 2219 states have (on average 1.7805317710680486) internal successors, (3951), 3062 states have internal predecessors, (3951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:26:56,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 3951 transitions. [2021-11-23 12:26:56,742 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 3951 transitions. Word has length 54 [2021-11-23 12:26:56,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:26:56,742 INFO L470 AbstractCegarLoop]: Abstraction has 3063 states and 3951 transitions. [2021-11-23 12:26:56,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 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) [2021-11-23 12:26:56,742 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 3951 transitions. [2021-11-23 12:26:56,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 12:26:56,743 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:26:56,743 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:26:56,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-23 12:26:56,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:26:56,956 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr740ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 12:26:56,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:26:56,957 INFO L85 PathProgramCache]: Analyzing trace with hash -993308447, now seen corresponding path program 1 times [2021-11-23 12:26:56,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:26:56,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [583524569] [2021-11-23 12:26:56,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:26:56,958 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:26:56,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:26:56,959 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:26:56,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-23 12:26:57,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:26:57,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:26:57,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:26:57,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 12:26:57,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 12:26:57,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 12:26:57,232 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-23 12:26:57,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-23 12:26:57,301 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-23 12:26:57,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-23 12:26:57,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:26:57,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:26:57,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:26:57,495 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:26:57,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [583524569] [2021-11-23 12:26:57,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [583524569] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:26:57,496 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:26:57,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-23 12:26:57,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439680526] [2021-11-23 12:26:57,496 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:26:57,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 12:26:57,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:26:57,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 12:26:57,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:26:57,498 INFO L87 Difference]: Start difference. First operand 3063 states and 3951 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 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) [2021-11-23 12:27:00,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:27:00,212 INFO L93 Difference]: Finished difference Result 3168 states and 4062 transitions. [2021-11-23 12:27:00,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:27:00,213 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 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 54 [2021-11-23 12:27:00,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:27:00,215 INFO L225 Difference]: With dead ends: 3168 [2021-11-23 12:27:00,215 INFO L226 Difference]: Without dead ends: 3168 [2021-11-23 12:27:00,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:27:00,220 INFO L933 BasicCegarLoop]: 1971 mSDtfsCounter, 1007 mSDsluCounter, 4818 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1007 SdHoareTripleChecker+Valid, 6789 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-23 12:27:00,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1007 Valid, 6789 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-23 12:27:00,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3168 states. [2021-11-23 12:27:00,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3168 to 3029. [2021-11-23 12:27:00,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3029 states, 2185 states have (on average 1.7922196796338672) internal successors, (3916), 3028 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:27:00,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3029 states to 3029 states and 3916 transitions. [2021-11-23 12:27:00,256 INFO L78 Accepts]: Start accepts. Automaton has 3029 states and 3916 transitions. Word has length 54 [2021-11-23 12:27:00,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:27:00,256 INFO L470 AbstractCegarLoop]: Abstraction has 3029 states and 3916 transitions. [2021-11-23 12:27:00,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 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) [2021-11-23 12:27:00,257 INFO L276 IsEmpty]: Start isEmpty. Operand 3029 states and 3916 transitions. [2021-11-23 12:27:00,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-23 12:27:00,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:27:00,258 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:27:00,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-23 12:27:00,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:27:00,471 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 12:27:00,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:27:00,472 INFO L85 PathProgramCache]: Analyzing trace with hash -637866953, now seen corresponding path program 1 times [2021-11-23 12:27:00,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:27:00,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1392732818] [2021-11-23 12:27:00,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:27:00,473 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:27:00,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:27:00,473 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:27:00,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-23 12:27:00,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:27:00,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:27:00,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:27:01,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:27:01,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:27:01,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:27:01,292 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:27:01,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1392732818] [2021-11-23 12:27:01,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1392732818] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:27:01,292 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:27:01,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-23 12:27:01,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438121359] [2021-11-23 12:27:01,293 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:27:01,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:27:01,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:27:01,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:27:01,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:27:01,294 INFO L87 Difference]: Start difference. First operand 3029 states and 3916 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:27:01,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:27:01,450 INFO L93 Difference]: Finished difference Result 4404 states and 5506 transitions. [2021-11-23 12:27:01,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:27:01,453 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-23 12:27:01,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:27:01,455 INFO L225 Difference]: With dead ends: 4404 [2021-11-23 12:27:01,455 INFO L226 Difference]: Without dead ends: 4404 [2021-11-23 12:27:01,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:27:01,456 INFO L933 BasicCegarLoop]: 2086 mSDtfsCounter, 1179 mSDsluCounter, 1947 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1179 SdHoareTripleChecker+Valid, 4033 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:27:01,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1179 Valid, 4033 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:27:01,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4404 states. [2021-11-23 12:27:01,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4404 to 3813. [2021-11-23 12:27:01,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3813 states, 2969 states have (on average 1.7615358706635231) internal successors, (5230), 3812 states have internal predecessors, (5230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:27:01,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 5230 transitions. [2021-11-23 12:27:01,489 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 5230 transitions. Word has length 59 [2021-11-23 12:27:01,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:27:01,489 INFO L470 AbstractCegarLoop]: Abstraction has 3813 states and 5230 transitions. [2021-11-23 12:27:01,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:27:01,489 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 5230 transitions. [2021-11-23 12:27:01,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-23 12:27:01,490 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:27:01,490 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:27:01,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-23 12:27:01,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:27:01,690 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr391REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 12:27:01,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:27:01,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1882812110, now seen corresponding path program 1 times [2021-11-23 12:27:01,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:27:01,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1779384773] [2021-11-23 12:27:01,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:27:01,691 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:27:01,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:27:01,692 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:27:01,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-23 12:27:02,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:27:02,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 12:27:02,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:27:02,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:27:02,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:27:02,609 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 12:27:02,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-11-23 12:27:02,624 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 12:27:02,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-11-23 12:27:02,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:27:02,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:27:08,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:27:08,079 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:27:08,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1779384773] [2021-11-23 12:27:08,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1779384773] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:27:08,080 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:27:08,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-23 12:27:08,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231736919] [2021-11-23 12:27:08,080 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:27:08,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 12:27:08,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:27:08,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 12:27:08,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-23 12:27:08,082 INFO L87 Difference]: Start difference. First operand 3813 states and 5230 transitions. Second operand has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:27:17,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:27:17,402 INFO L93 Difference]: Finished difference Result 5689 states and 7772 transitions. [2021-11-23 12:27:17,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:27:17,403 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-23 12:27:17,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:27:17,409 INFO L225 Difference]: With dead ends: 5689 [2021-11-23 12:27:17,409 INFO L226 Difference]: Without dead ends: 5689 [2021-11-23 12:27:17,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2021-11-23 12:27:17,410 INFO L933 BasicCegarLoop]: 1669 mSDtfsCounter, 2975 mSDsluCounter, 2044 mSDsCounter, 0 mSdLazyCounter, 2593 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2975 SdHoareTripleChecker+Valid, 3713 SdHoareTripleChecker+Invalid, 4013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1334 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:27:17,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2975 Valid, 3713 Invalid, 4013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2593 Invalid, 0 Unknown, 1334 Unchecked, 9.2s Time] [2021-11-23 12:27:17,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5689 states. [2021-11-23 12:27:17,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5689 to 3805. [2021-11-23 12:27:17,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3805 states, 3022 states have (on average 1.7183984116479152) internal successors, (5193), 3804 states have internal predecessors, (5193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:27:17,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3805 states to 3805 states and 5193 transitions. [2021-11-23 12:27:17,477 INFO L78 Accepts]: Start accepts. Automaton has 3805 states and 5193 transitions. Word has length 62 [2021-11-23 12:27:17,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:27:17,478 INFO L470 AbstractCegarLoop]: Abstraction has 3805 states and 5193 transitions. [2021-11-23 12:27:17,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:27:17,478 INFO L276 IsEmpty]: Start isEmpty. Operand 3805 states and 5193 transitions. [2021-11-23 12:27:17,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 12:27:17,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:27:17,479 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:27:17,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-11-23 12:27:17,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:27:17,692 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr393REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 12:27:17,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:27:17,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1201169645, now seen corresponding path program 1 times [2021-11-23 12:27:17,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:27:17,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [212132384] [2021-11-23 12:27:17,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:27:17,693 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:27:17,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:27:17,694 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:27:17,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 12:27:17,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:27:17,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:27:17,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:27:18,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:27:18,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:27:18,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-11-23 12:27:18,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:27:18,487 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:27:18,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [212132384] [2021-11-23 12:27:18,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [212132384] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:27:18,487 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:27:18,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-23 12:27:18,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078659449] [2021-11-23 12:27:18,488 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:27:18,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 12:27:18,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:27:18,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 12:27:18,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:27:18,489 INFO L87 Difference]: Start difference. First operand 3805 states and 5193 transitions. Second operand has 6 states, 5 states have (on average 24.8) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:27:22,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:27:22,946 INFO L93 Difference]: Finished difference Result 3806 states and 5186 transitions. [2021-11-23 12:27:22,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:27:22,948 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 24.8) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 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 64 [2021-11-23 12:27:22,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:27:22,951 INFO L225 Difference]: With dead ends: 3806 [2021-11-23 12:27:22,951 INFO L226 Difference]: Without dead ends: 3806 [2021-11-23 12:27:22,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:27:22,952 INFO L933 BasicCegarLoop]: 1350 mSDtfsCounter, 1813 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1813 SdHoareTripleChecker+Valid, 2155 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-23 12:27:22,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1813 Valid, 2155 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-11-23 12:27:22,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3806 states. [2021-11-23 12:27:22,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3806 to 3802. [2021-11-23 12:27:22,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3802 states, 3022 states have (on average 1.7160820648577102) internal successors, (5186), 3801 states have internal predecessors, (5186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:27:22,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3802 states to 3802 states and 5186 transitions. [2021-11-23 12:27:22,994 INFO L78 Accepts]: Start accepts. Automaton has 3802 states and 5186 transitions. Word has length 64 [2021-11-23 12:27:22,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:27:22,995 INFO L470 AbstractCegarLoop]: Abstraction has 3802 states and 5186 transitions. [2021-11-23 12:27:22,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 24.8) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:27:22,995 INFO L276 IsEmpty]: Start isEmpty. Operand 3802 states and 5186 transitions. [2021-11-23 12:27:22,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 12:27:22,996 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:27:22,996 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:27:23,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-23 12:27:23,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:27:23,200 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr396ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 12:27:23,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:27:23,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1203198829, now seen corresponding path program 1 times [2021-11-23 12:27:23,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:27:23,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [934075170] [2021-11-23 12:27:23,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:27:23,201 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:27:23,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:27:23,202 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:27:23,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-23 12:27:23,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:27:23,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 12:27:23,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:27:23,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:27:23,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-23 12:27:23,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 12:27:23,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:27:23,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:27:23,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:27:23,762 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:27:23,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [934075170] [2021-11-23 12:27:23,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [934075170] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:27:23,762 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:27:23,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-23 12:27:23,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620248753] [2021-11-23 12:27:23,762 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:27:23,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 12:27:23,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:27:23,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 12:27:23,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:27:23,764 INFO L87 Difference]: Start difference. First operand 3802 states and 5186 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:27:34,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:27:34,072 INFO L93 Difference]: Finished difference Result 6218 states and 8419 transitions. [2021-11-23 12:27:34,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 12:27:34,073 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-23 12:27:34,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:27:34,079 INFO L225 Difference]: With dead ends: 6218 [2021-11-23 12:27:34,079 INFO L226 Difference]: Without dead ends: 6218 [2021-11-23 12:27:34,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 127 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-23 12:27:34,080 INFO L933 BasicCegarLoop]: 1348 mSDtfsCounter, 1864 mSDsluCounter, 4582 mSDsCounter, 0 mSdLazyCounter, 4260 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1864 SdHoareTripleChecker+Valid, 5930 SdHoareTripleChecker+Invalid, 4282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 4260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:27:34,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1864 Valid, 5930 Invalid, 4282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 4260 Invalid, 0 Unknown, 0 Unchecked, 10.0s Time] [2021-11-23 12:27:34,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6218 states. [2021-11-23 12:27:34,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6218 to 3801. [2021-11-23 12:27:34,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3801 states, 3022 states have (on average 1.715089344804765) internal successors, (5183), 3800 states have internal predecessors, (5183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:27:34,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3801 states to 3801 states and 5183 transitions. [2021-11-23 12:27:34,136 INFO L78 Accepts]: Start accepts. Automaton has 3801 states and 5183 transitions. Word has length 68 [2021-11-23 12:27:34,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:27:34,136 INFO L470 AbstractCegarLoop]: Abstraction has 3801 states and 5183 transitions. [2021-11-23 12:27:34,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:27:34,137 INFO L276 IsEmpty]: Start isEmpty. Operand 3801 states and 5183 transitions. [2021-11-23 12:27:34,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 12:27:34,137 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:27:34,138 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:27:34,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-23 12:27:34,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:27:34,343 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr78ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 12:27:34,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:27:34,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1028979469, now seen corresponding path program 1 times [2021-11-23 12:27:34,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:27:34,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [890035560] [2021-11-23 12:27:34,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:27:34,344 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:27:34,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:27:34,345 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:27:34,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-23 12:27:34,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:27:34,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 12:27:34,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:27:34,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:27:34,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-23 12:27:34,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 12:27:34,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:27:34,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:27:34,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:27:34,893 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:27:34,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [890035560] [2021-11-23 12:27:34,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [890035560] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:27:34,893 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:27:34,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-23 12:27:34,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828285352] [2021-11-23 12:27:34,894 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:27:34,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 12:27:34,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:27:34,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 12:27:34,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:27:34,895 INFO L87 Difference]: Start difference. First operand 3801 states and 5183 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:27:45,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:27:45,188 INFO L93 Difference]: Finished difference Result 6210 states and 8405 transitions. [2021-11-23 12:27:45,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 12:27:45,188 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-23 12:27:45,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:27:45,195 INFO L225 Difference]: With dead ends: 6210 [2021-11-23 12:27:45,195 INFO L226 Difference]: Without dead ends: 6210 [2021-11-23 12:27:45,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-23 12:27:45,196 INFO L933 BasicCegarLoop]: 1347 mSDtfsCounter, 1864 mSDsluCounter, 4582 mSDsCounter, 0 mSdLazyCounter, 4256 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1864 SdHoareTripleChecker+Valid, 5929 SdHoareTripleChecker+Invalid, 4278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 4256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:27:45,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1864 Valid, 5929 Invalid, 4278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 4256 Invalid, 0 Unknown, 0 Unchecked, 10.0s Time] [2021-11-23 12:27:45,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6210 states. [2021-11-23 12:27:45,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6210 to 3800. [2021-11-23 12:27:45,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3800 states, 3022 states have (on average 1.714427531436135) internal successors, (5181), 3799 states have internal predecessors, (5181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:27:45,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3800 states to 3800 states and 5181 transitions. [2021-11-23 12:27:45,242 INFO L78 Accepts]: Start accepts. Automaton has 3800 states and 5181 transitions. Word has length 68 [2021-11-23 12:27:45,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:27:45,242 INFO L470 AbstractCegarLoop]: Abstraction has 3800 states and 5181 transitions. [2021-11-23 12:27:45,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:27:45,242 INFO L276 IsEmpty]: Start isEmpty. Operand 3800 states and 5181 transitions. [2021-11-23 12:27:45,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 12:27:45,243 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:27:45,243 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:27:45,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-23 12:27:45,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:27:45,444 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr397ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 12:27:45,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:27:45,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1355543210, now seen corresponding path program 1 times [2021-11-23 12:27:45,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:27:45,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [910237579] [2021-11-23 12:27:45,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:27:45,445 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:27:45,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:27:45,446 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:27:45,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-23 12:27:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:27:45,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 12:27:45,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:27:45,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:27:45,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-23 12:27:45,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 12:27:45,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-23 12:27:45,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-23 12:27:45,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:27:45,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:27:46,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:27:46,337 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:27:46,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [910237579] [2021-11-23 12:27:46,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [910237579] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:27:46,337 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:27:46,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-23 12:27:46,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058500553] [2021-11-23 12:27:46,338 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:27:46,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 12:27:46,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:27:46,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 12:27:46,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-23 12:27:46,339 INFO L87 Difference]: Start difference. First operand 3800 states and 5181 transitions. Second operand has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:28:18,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:28:18,834 INFO L93 Difference]: Finished difference Result 5699 states and 7685 transitions. [2021-11-23 12:28:18,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 12:28:18,835 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-23 12:28:18,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:28:18,839 INFO L225 Difference]: With dead ends: 5699 [2021-11-23 12:28:18,839 INFO L226 Difference]: Without dead ends: 5699 [2021-11-23 12:28:18,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-23 12:28:18,840 INFO L933 BasicCegarLoop]: 1310 mSDtfsCounter, 1873 mSDsluCounter, 7802 mSDsCounter, 0 mSdLazyCounter, 6818 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1873 SdHoareTripleChecker+Valid, 9112 SdHoareTripleChecker+Invalid, 6835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 6818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:28:18,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1873 Valid, 9112 Invalid, 6835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 6818 Invalid, 0 Unknown, 0 Unchecked, 32.1s Time] [2021-11-23 12:28:18,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5699 states. [2021-11-23 12:28:18,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5699 to 3799. [2021-11-23 12:28:18,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3799 states, 3022 states have (on average 1.7134348113831899) internal successors, (5178), 3798 states have internal predecessors, (5178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:28:18,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3799 states to 3799 states and 5178 transitions. [2021-11-23 12:28:18,912 INFO L78 Accepts]: Start accepts. Automaton has 3799 states and 5178 transitions. Word has length 69 [2021-11-23 12:28:18,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:28:18,913 INFO L470 AbstractCegarLoop]: Abstraction has 3799 states and 5178 transitions. [2021-11-23 12:28:18,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:28:18,913 INFO L276 IsEmpty]: Start isEmpty. Operand 3799 states and 5178 transitions. [2021-11-23 12:28:18,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 12:28:18,913 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:28:18,913 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:28:18,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-23 12:28:19,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:28:19,114 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr79ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 12:28:19,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:28:19,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1833592125, now seen corresponding path program 1 times [2021-11-23 12:28:19,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:28:19,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1746279746] [2021-11-23 12:28:19,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:28:19,116 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:28:19,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:28:19,116 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:28:19,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-23 12:28:19,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:28:19,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 12:28:19,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:28:19,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:28:19,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 12:28:19,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-23 12:28:19,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-23 12:28:19,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-23 12:28:19,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:28:19,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:28:20,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:28:20,018 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:28:20,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1746279746] [2021-11-23 12:28:20,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1746279746] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:28:20,018 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:28:20,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-23 12:28:20,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317202478] [2021-11-23 12:28:20,018 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:28:20,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 12:28:20,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:28:20,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 12:28:20,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-23 12:28:20,020 INFO L87 Difference]: Start difference. First operand 3799 states and 5178 transitions. Second operand has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:28:49,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:28:49,565 INFO L93 Difference]: Finished difference Result 5694 states and 7676 transitions. [2021-11-23 12:28:49,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 12:28:49,566 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-23 12:28:49,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:28:49,570 INFO L225 Difference]: With dead ends: 5694 [2021-11-23 12:28:49,570 INFO L226 Difference]: Without dead ends: 5694 [2021-11-23 12:28:49,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-23 12:28:49,571 INFO L933 BasicCegarLoop]: 1309 mSDtfsCounter, 1879 mSDsluCounter, 6622 mSDsCounter, 0 mSdLazyCounter, 5893 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1879 SdHoareTripleChecker+Valid, 7931 SdHoareTripleChecker+Invalid, 5911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 5893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:28:49,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1879 Valid, 7931 Invalid, 5911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 5893 Invalid, 0 Unknown, 0 Unchecked, 29.2s Time] [2021-11-23 12:28:49,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5694 states. [2021-11-23 12:28:49,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5694 to 3798. [2021-11-23 12:28:49,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3798 states, 3022 states have (on average 1.7127729980145598) internal successors, (5176), 3797 states have internal predecessors, (5176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:28:49,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3798 states to 3798 states and 5176 transitions. [2021-11-23 12:28:49,609 INFO L78 Accepts]: Start accepts. Automaton has 3798 states and 5176 transitions. Word has length 69 [2021-11-23 12:28:49,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:28:49,610 INFO L470 AbstractCegarLoop]: Abstraction has 3798 states and 5176 transitions. [2021-11-23 12:28:49,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:28:49,610 INFO L276 IsEmpty]: Start isEmpty. Operand 3798 states and 5176 transitions. [2021-11-23 12:28:49,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-23 12:28:49,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:28:49,610 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:28:49,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-23 12:28:49,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:28:49,811 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr400REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 12:28:49,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:28:49,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1361720913, now seen corresponding path program 1 times [2021-11-23 12:28:49,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:28:49,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [697570173] [2021-11-23 12:28:49,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:28:49,812 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:28:49,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:28:49,813 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:28:49,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-23 12:28:50,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:28:50,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:28:50,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:28:50,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:28:50,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:28:50,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:28:50,259 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:28:50,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [697570173] [2021-11-23 12:28:50,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [697570173] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:28:50,259 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:28:50,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-23 12:28:50,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281683961] [2021-11-23 12:28:50,259 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:28:50,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 12:28:50,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:28:50,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 12:28:50,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:28:50,261 INFO L87 Difference]: Start difference. First operand 3798 states and 5176 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:28:50,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:28:50,549 INFO L93 Difference]: Finished difference Result 6959 states and 9406 transitions. [2021-11-23 12:28:50,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 12:28:50,549 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 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 73 [2021-11-23 12:28:50,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:28:50,577 INFO L225 Difference]: With dead ends: 6959 [2021-11-23 12:28:50,577 INFO L226 Difference]: Without dead ends: 6959 [2021-11-23 12:28:50,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:28:50,578 INFO L933 BasicCegarLoop]: 2542 mSDtfsCounter, 1997 mSDsluCounter, 9392 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1997 SdHoareTripleChecker+Valid, 11934 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:28:50,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1997 Valid, 11934 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 12:28:50,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6959 states. [2021-11-23 12:28:50,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6959 to 3813. [2021-11-23 12:28:50,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3813 states, 3037 states have (on average 1.7092525518603885) internal successors, (5191), 3812 states have internal predecessors, (5191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:28:50,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 5191 transitions. [2021-11-23 12:28:50,624 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 5191 transitions. Word has length 73 [2021-11-23 12:28:50,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:28:50,625 INFO L470 AbstractCegarLoop]: Abstraction has 3813 states and 5191 transitions. [2021-11-23 12:28:50,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:28:50,625 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 5191 transitions. [2021-11-23 12:28:50,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-23 12:28:50,626 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:28:50,626 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:28:50,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-11-23 12:28:50,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:28:50,840 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr400REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 12:28:50,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:28:50,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1412235279, now seen corresponding path program 1 times [2021-11-23 12:28:50,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:28:50,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1973896482] [2021-11-23 12:28:50,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:28:50,841 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:28:50,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:28:50,842 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:28:50,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-23 12:28:51,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:28:51,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 12:28:51,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:28:51,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:28:51,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:28:51,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:28:51,460 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:28:51,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1973896482] [2021-11-23 12:28:51,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1973896482] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:28:51,460 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:28:51,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-23 12:28:51,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207370519] [2021-11-23 12:28:51,461 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 12:28:51,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 12:28:51,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:28:51,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 12:28:51,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-23 12:28:51,462 INFO L87 Difference]: Start difference. First operand 3813 states and 5191 transitions. Second operand has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:28:52,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:28:52,171 INFO L93 Difference]: Finished difference Result 6253 states and 8439 transitions. [2021-11-23 12:28:52,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 12:28:52,172 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-23 12:28:52,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:28:52,178 INFO L225 Difference]: With dead ends: 6253 [2021-11-23 12:28:52,179 INFO L226 Difference]: Without dead ends: 6253 [2021-11-23 12:28:52,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-11-23 12:28:52,179 INFO L933 BasicCegarLoop]: 2124 mSDtfsCounter, 1667 mSDsluCounter, 9705 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1667 SdHoareTripleChecker+Valid, 11829 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 12:28:52,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1667 Valid, 11829 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 12:28:52,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6253 states. [2021-11-23 12:28:52,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6253 to 3843. [2021-11-23 12:28:52,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3843 states, 3067 states have (on average 1.7023149657645908) internal successors, (5221), 3842 states have internal predecessors, (5221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:28:52,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3843 states to 3843 states and 5221 transitions. [2021-11-23 12:28:52,246 INFO L78 Accepts]: Start accepts. Automaton has 3843 states and 5221 transitions. Word has length 75 [2021-11-23 12:28:52,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:28:52,246 INFO L470 AbstractCegarLoop]: Abstraction has 3843 states and 5221 transitions. [2021-11-23 12:28:52,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:28:52,246 INFO L276 IsEmpty]: Start isEmpty. Operand 3843 states and 5221 transitions. [2021-11-23 12:28:52,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 12:28:52,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:28:52,247 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:28:52,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-11-23 12:28:52,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:28:52,460 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr400REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-23 12:28:52,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:28:52,461 INFO L85 PathProgramCache]: Analyzing trace with hash -547693775, now seen corresponding path program 2 times [2021-11-23 12:28:52,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:28:52,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1583809576] [2021-11-23 12:28:52,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:28:52,462 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:28:52,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:28:52,462 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:28:52,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2808af96-6a00-4aa9-8724-540827c7db91/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-23 12:28:52,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-23 12:28:52,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:28:52,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 12:28:52,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:28:52,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:28:52,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 12:28:52,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 12:28:52,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 12:28:52,946 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-23 12:28:52,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-23 12:28:53,075 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 12:28:53,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-11-23 12:28:53,321 INFO L354 Elim1Store]: treesize reduction 229, result has 11.2 percent of original size [2021-11-23 12:28:53,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 66 treesize of output 86 [2021-11-23 12:28:58,932 INFO L354 Elim1Store]: treesize reduction 1963, result has 5.1 percent of original size [2021-11-23 12:28:58,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 39 case distinctions, treesize of input 118 treesize of output 150 [2021-11-23 12:29:08,494 INFO L354 Elim1Store]: treesize reduction 876, result has 0.1 percent of original size [2021-11-23 12:29:08,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 157 treesize of output 67 [2021-11-23 12:29:08,649 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 12:29:08,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:29:19,196 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~user~0#1.base_332| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_~user~0#1.base_332|))) (forall ((|ULTIMATE.start_main_#t~mem11#1| (_ BitVec 32)) (|ULTIMATE.start_main_#t~mem9#1| (_ BitVec 32)) (|ULTIMATE.start_main_#t~mem10#1| (_ BitVec 32)) (|ULTIMATE.start_main_~user~0#1.offset| (_ BitVec 32))) (bvslt (let ((.cse0 (select (store |c_#memory_int| |v_ULTIMATE.start_main_~user~0#1.base_332| (let ((.cse1 (bvmul |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|))) (store (store (store (store (store (store (store (store (select |c_#memory_int| |v_ULTIMATE.start_main_~user~0#1.base_332|) |ULTIMATE.start_main_~user~0#1.offset| ((_ extract 7 0) |ULTIMATE.start_main_#t~mem9#1|)) (bvadd (_ bv1 32) |ULTIMATE.start_main_~user~0#1.offset|) ((_ extract 15 8) |ULTIMATE.start_main_#t~mem9#1|)) (bvadd (_ bv2 32) |ULTIMATE.start_main_~user~0#1.offset|) ((_ extract 23 16) |ULTIMATE.start_main_#t~mem9#1|)) (bvadd (_ bv3 32) |ULTIMATE.start_main_~user~0#1.offset|) ((_ extract 31 24) |ULTIMATE.start_main_#t~mem9#1|)) (bvadd (_ bv4 32) |ULTIMATE.start_main_~user~0#1.offset|) ((_ extract 7 0) .cse1)) (bvadd (_ bv5 32) |ULTIMATE.start_main_~user~0#1.offset|) ((_ extract 15 8) .cse1)) (bvadd (_ bv6 32) |ULTIMATE.start_main_~user~0#1.offset|) ((_ extract 23 16) .cse1)) (bvadd (_ bv7 32) |ULTIMATE.start_main_~user~0#1.offset|) ((_ extract 31 24) .cse1)))) |c_ULTIMATE.start_main_~#i~0#1.base|))) (concat (concat (concat (select .cse0 (bvadd (_ bv3 32) |c_ULTIMATE.start_main_~#i~0#1.offset|)) (select .cse0 (bvadd (_ bv2 32) |c_ULTIMATE.start_main_~#i~0#1.offset|))) (select .cse0 (bvadd (_ bv1 32) |c_ULTIMATE.start_main_~#i~0#1.offset|))) (select .cse0 |c_ULTIMATE.start_main_~#i~0#1.offset|))) (_ bv10 32))))) is different from false