./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8 --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 e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 10:59:41,698 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 10:59:41,701 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 10:59:41,726 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 10:59:41,726 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 10:59:41,727 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 10:59:41,729 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 10:59:41,731 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 10:59:41,733 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 10:59:41,734 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 10:59:41,736 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 10:59:41,737 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 10:59:41,737 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 10:59:41,739 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 10:59:41,740 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 10:59:41,742 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 10:59:41,743 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 10:59:41,744 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 10:59:41,746 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 10:59:41,749 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 10:59:41,751 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 10:59:41,752 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 10:59:41,753 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 10:59:41,755 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 10:59:41,759 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 10:59:41,760 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 10:59:41,760 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 10:59:41,761 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 10:59:41,762 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 10:59:41,763 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 10:59:41,763 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 10:59:41,764 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 10:59:41,765 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 10:59:41,767 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 10:59:41,768 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 10:59:41,769 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 10:59:41,770 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 10:59:41,770 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 10:59:41,771 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 10:59:41,772 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 10:59:41,773 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 10:59:41,774 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-16 10:59:41,799 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 10:59:41,800 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 10:59:41,800 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 10:59:41,800 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 10:59:41,801 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 10:59:41,802 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 10:59:41,802 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 10:59:41,803 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 10:59:41,803 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 10:59:41,803 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 10:59:41,804 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 10:59:41,804 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 10:59:41,804 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 10:59:41,805 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 10:59:41,805 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 10:59:41,805 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 10:59:41,805 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 10:59:41,806 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 10:59:41,806 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 10:59:41,806 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 10:59:41,806 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 10:59:41,806 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 10:59:41,807 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 10:59:41,807 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 10:59:41,807 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 10:59:41,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 10:59:41,808 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 10:59:41,808 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 10:59:41,808 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 10:59:41,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 10:59:41,809 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_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 [2022-11-16 10:59:42,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 10:59:42,159 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 10:59:42,164 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 10:59:42,168 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 10:59:42,169 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 10:59:42,171 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2022-11-16 10:59:42,269 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/data/b1813bbd4/4969fe53bb6146d38aa5d75ea8dbdf83/FLAGb4a8c3b57 [2022-11-16 10:59:42,903 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 10:59:42,904 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2022-11-16 10:59:42,912 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/data/b1813bbd4/4969fe53bb6146d38aa5d75ea8dbdf83/FLAGb4a8c3b57 [2022-11-16 10:59:43,279 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/data/b1813bbd4/4969fe53bb6146d38aa5d75ea8dbdf83 [2022-11-16 10:59:43,285 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 10:59:43,290 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 10:59:43,295 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 10:59:43,295 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 10:59:43,301 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 10:59:43,302 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 10:59:43" (1/1) ... [2022-11-16 10:59:43,304 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27379bc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:59:43, skipping insertion in model container [2022-11-16 10:59:43,305 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 10:59:43" (1/1) ... [2022-11-16 10:59:43,314 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 10:59:43,354 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 10:59:43,598 WARN L229 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_470a061a-9051-4812-9211-8a61b4acb209/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c[3947,3960] [2022-11-16 10:59:43,608 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 10:59:43,620 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-16 10:59:43,621 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@30dbbf05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:59:43, skipping insertion in model container [2022-11-16 10:59:43,621 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 10:59:43,622 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-16 10:59:43,624 INFO L158 Benchmark]: Toolchain (without parser) took 333.89ms. Allocated memory is still 121.6MB. Free memory was 86.1MB in the beginning and 98.7MB in the end (delta: -12.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-16 10:59:43,625 INFO L158 Benchmark]: CDTParser took 0.40ms. Allocated memory is still 121.6MB. Free memory is still 102.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 10:59:43,626 INFO L158 Benchmark]: CACSL2BoogieTranslator took 327.33ms. Allocated memory is still 121.6MB. Free memory was 85.8MB in the beginning and 98.7MB in the end (delta: -12.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-16 10:59:43,628 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40ms. Allocated memory is still 121.6MB. Free memory is still 102.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 327.33ms. Allocated memory is still 121.6MB. Free memory was 85.8MB in the beginning and 98.7MB in the end (delta: -12.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 159]: Unsupported Syntax Found a cast between two array/pointer types of different sizes 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/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8 --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 e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 10:59:46,116 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 10:59:46,119 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 10:59:46,154 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 10:59:46,155 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 10:59:46,159 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 10:59:46,162 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 10:59:46,170 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 10:59:46,172 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 10:59:46,178 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 10:59:46,180 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 10:59:46,182 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 10:59:46,183 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 10:59:46,186 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 10:59:46,188 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 10:59:46,190 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 10:59:46,193 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 10:59:46,194 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 10:59:46,200 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 10:59:46,203 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 10:59:46,211 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 10:59:46,213 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 10:59:46,214 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 10:59:46,217 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 10:59:46,221 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 10:59:46,227 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 10:59:46,228 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 10:59:46,229 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 10:59:46,231 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 10:59:46,232 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 10:59:46,233 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 10:59:46,234 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 10:59:46,236 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 10:59:46,237 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 10:59:46,239 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 10:59:46,239 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 10:59:46,240 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 10:59:46,240 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 10:59:46,241 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 10:59:46,243 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 10:59:46,244 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 10:59:46,250 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-16 10:59:46,292 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 10:59:46,293 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 10:59:46,294 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 10:59:46,295 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 10:59:46,296 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 10:59:46,296 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 10:59:46,298 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 10:59:46,298 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 10:59:46,298 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 10:59:46,298 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 10:59:46,299 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 10:59:46,300 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 10:59:46,300 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 10:59:46,300 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 10:59:46,301 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 10:59:46,301 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 10:59:46,301 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 10:59:46,301 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 10:59:46,301 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 10:59:46,302 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 10:59:46,302 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-16 10:59:46,302 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-16 10:59:46,302 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 10:59:46,303 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 10:59:46,303 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 10:59:46,303 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 10:59:46,304 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 10:59:46,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 10:59:46,304 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 10:59:46,304 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 10:59:46,304 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-16 10:59:46,305 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-16 10:59:46,305 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-16 10:59:46,305 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_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 [2022-11-16 10:59:46,805 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 10:59:46,839 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 10:59:46,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 10:59:46,844 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 10:59:46,845 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 10:59:46,847 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2022-11-16 10:59:46,931 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/data/d84f4eae3/8715fe98c4a84b278d188562cce11dc0/FLAG15d8e17ff [2022-11-16 10:59:47,591 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 10:59:47,594 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2022-11-16 10:59:47,606 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/data/d84f4eae3/8715fe98c4a84b278d188562cce11dc0/FLAG15d8e17ff [2022-11-16 10:59:47,904 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/data/d84f4eae3/8715fe98c4a84b278d188562cce11dc0 [2022-11-16 10:59:47,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 10:59:47,908 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 10:59:47,910 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 10:59:47,911 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 10:59:47,915 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 10:59:47,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 10:59:47" (1/1) ... [2022-11-16 10:59:47,917 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d37ef8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:59:47, skipping insertion in model container [2022-11-16 10:59:47,918 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 10:59:47" (1/1) ... [2022-11-16 10:59:47,927 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 10:59:47,969 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 10:59:48,238 WARN L229 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_470a061a-9051-4812-9211-8a61b4acb209/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c[3947,3960] [2022-11-16 10:59:48,248 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 10:59:48,282 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-16 10:59:48,293 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 10:59:48,339 WARN L229 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_470a061a-9051-4812-9211-8a61b4acb209/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c[3947,3960] [2022-11-16 10:59:48,350 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 10:59:48,361 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 10:59:48,438 WARN L229 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_470a061a-9051-4812-9211-8a61b4acb209/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c[3947,3960] [2022-11-16 10:59:48,442 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 10:59:48,470 INFO L208 MainTranslator]: Completed translation [2022-11-16 10:59:48,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:59:48 WrapperNode [2022-11-16 10:59:48,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 10:59:48,472 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 10:59:48,473 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 10:59:48,473 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 10:59:48,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:59:48" (1/1) ... [2022-11-16 10:59:48,508 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:59:48" (1/1) ... [2022-11-16 10:59:48,574 INFO L138 Inliner]: procedures = 27, calls = 61, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 305 [2022-11-16 10:59:48,574 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 10:59:48,575 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 10:59:48,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 10:59:48,578 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 10:59:48,596 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:59:48" (1/1) ... [2022-11-16 10:59:48,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:59:48" (1/1) ... [2022-11-16 10:59:48,602 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:59:48" (1/1) ... [2022-11-16 10:59:48,607 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:59:48" (1/1) ... [2022-11-16 10:59:48,626 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:59:48" (1/1) ... [2022-11-16 10:59:48,648 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:59:48" (1/1) ... [2022-11-16 10:59:48,650 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:59:48" (1/1) ... [2022-11-16 10:59:48,654 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:59:48" (1/1) ... [2022-11-16 10:59:48,668 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 10:59:48,669 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 10:59:48,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 10:59:48,670 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 10:59:48,671 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:59:48" (1/1) ... [2022-11-16 10:59:48,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 10:59:48,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:59:48,712 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 10:59:48,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 10:59:48,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 10:59:48,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-16 10:59:48,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 10:59:48,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-16 10:59:48,781 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 10:59:48,781 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 10:59:48,782 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 10:59:48,782 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 10:59:48,782 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-16 10:59:48,782 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-16 10:59:48,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 10:59:48,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 10:59:48,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 10:59:48,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 10:59:48,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 10:59:48,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 10:59:48,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-16 10:59:48,785 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 10:59:49,024 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 10:59:49,026 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 10:59:50,088 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 10:59:50,511 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 10:59:50,511 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-16 10:59:50,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 10:59:50 BoogieIcfgContainer [2022-11-16 10:59:50,514 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 10:59:50,517 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 10:59:50,517 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 10:59:50,521 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 10:59:50,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 10:59:47" (1/3) ... [2022-11-16 10:59:50,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b019bed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 10:59:50, skipping insertion in model container [2022-11-16 10:59:50,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:59:48" (2/3) ... [2022-11-16 10:59:50,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b019bed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 10:59:50, skipping insertion in model container [2022-11-16 10:59:50,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 10:59:50" (3/3) ... [2022-11-16 10:59:50,524 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring.wvr.c [2022-11-16 10:59:50,546 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 10:59:50,547 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2022-11-16 10:59:50,547 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 10:59:50,703 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-16 10:59:50,775 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 10:59:50,805 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 281 places, 293 transitions, 610 flow [2022-11-16 10:59:50,810 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 281 places, 293 transitions, 610 flow [2022-11-16 10:59:50,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 293 transitions, 610 flow [2022-11-16 10:59:51,021 INFO L130 PetriNetUnfolder]: 22/290 cut-off events. [2022-11-16 10:59:51,021 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-16 10:59:51,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 290 events. 22/290 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 300 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 237. Up to 3 conditions per place. [2022-11-16 10:59:51,064 INFO L119 LiptonReduction]: Number of co-enabled transitions 3794 [2022-11-16 11:00:56,746 WARN L233 SmtUtils]: Spent 6.95s on a formula simplification. DAG size of input: 135 DAG size of output: 134 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-16 11:01:05,392 WARN L233 SmtUtils]: Spent 7.15s on a formula simplification. DAG size of input: 141 DAG size of output: 140 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-16 11:01:05,970 INFO L134 LiptonReduction]: Checked pairs total: 6382 [2022-11-16 11:01:05,970 INFO L136 LiptonReduction]: Total number of compositions: 308 [2022-11-16 11:01:05,979 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 71 places, 68 transitions, 160 flow [2022-11-16 11:01:06,186 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2868 states, 2190 states have (on average 4.810502283105023) internal successors, (10535), 2867 states have internal predecessors, (10535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:01:06,207 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:01:06,213 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@59f1d4af, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:01:06,214 INFO L358 AbstractCegarLoop]: Starting to check reachability of 51 error locations. [2022-11-16 11:01:06,224 INFO L276 IsEmpty]: Start isEmpty. Operand has 2868 states, 2190 states have (on average 4.810502283105023) internal successors, (10535), 2867 states have internal predecessors, (10535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:01:06,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 11:01:06,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:01:06,231 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 11:01:06,232 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:01:06,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:01:06,238 INFO L85 PathProgramCache]: Analyzing trace with hash 43218, now seen corresponding path program 1 times [2022-11-16 11:01:06,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:01:06,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1676800641] [2022-11-16 11:01:06,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:01:06,255 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:01:06,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:01:06,261 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:01:06,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-16 11:01:06,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:01:06,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:01:06,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:01:06,669 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:01:06,670 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:01:06,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:01:06,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:01:06,726 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:01:06,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1676800641] [2022-11-16 11:01:06,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1676800641] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:01:06,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:01:06,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:01:06,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884849802] [2022-11-16 11:01:06,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:01:06,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:01:06,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:01:06,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:01:06,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:01:06,808 INFO L87 Difference]: Start difference. First operand has 2868 states, 2190 states have (on average 4.810502283105023) internal successors, (10535), 2867 states have internal predecessors, (10535), 0 states have call successors, (0), 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 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:01:07,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:01:07,579 INFO L93 Difference]: Finished difference Result 2864 states and 10183 transitions. [2022-11-16 11:01:07,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:01:07,582 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-16 11:01:07,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:01:07,678 INFO L225 Difference]: With dead ends: 2864 [2022-11-16 11:01:07,678 INFO L226 Difference]: Without dead ends: 2864 [2022-11-16 11:01:07,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:01:07,689 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 56 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:01:07,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 0 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:01:07,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2864 states. [2022-11-16 11:01:07,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2864 to 2864. [2022-11-16 11:01:07,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2864 states, 2190 states have (on average 4.649771689497717) internal successors, (10183), 2863 states have internal predecessors, (10183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:01:08,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 10183 transitions. [2022-11-16 11:01:08,007 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 10183 transitions. Word has length 2 [2022-11-16 11:01:08,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:01:08,010 INFO L495 AbstractCegarLoop]: Abstraction has 2864 states and 10183 transitions. [2022-11-16 11:01:08,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:01:08,010 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 10183 transitions. [2022-11-16 11:01:08,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 11:01:08,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:01:08,011 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 11:01:08,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-16 11:01:08,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:01:08,221 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:01:08,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:01:08,222 INFO L85 PathProgramCache]: Analyzing trace with hash 43219, now seen corresponding path program 1 times [2022-11-16 11:01:08,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:01:08,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1003488401] [2022-11-16 11:01:08,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:01:08,223 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:01:08,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:01:08,225 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:01:08,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-16 11:01:08,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:01:08,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:01:08,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:01:08,539 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:01:08,540 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:01:08,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:01:08,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:01:08,595 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:01:08,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1003488401] [2022-11-16 11:01:08,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1003488401] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:01:08,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:01:08,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:01:08,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917404562] [2022-11-16 11:01:08,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:01:08,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:01:08,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:01:08,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:01:08,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:01:08,599 INFO L87 Difference]: Start difference. First operand 2864 states and 10183 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:01:09,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:01:09,621 INFO L93 Difference]: Finished difference Result 5724 states and 20362 transitions. [2022-11-16 11:01:09,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:01:09,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-16 11:01:09,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:01:09,721 INFO L225 Difference]: With dead ends: 5724 [2022-11-16 11:01:09,722 INFO L226 Difference]: Without dead ends: 5724 [2022-11-16 11:01:09,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:01:09,728 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 50 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:01:09,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 0 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 11:01:09,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5724 states. [2022-11-16 11:01:09,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5724 to 2867. [2022-11-16 11:01:10,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2867 states, 2193 states have (on average 4.647058823529412) internal successors, (10191), 2866 states have internal predecessors, (10191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:01:10,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2867 states to 2867 states and 10191 transitions. [2022-11-16 11:01:10,074 INFO L78 Accepts]: Start accepts. Automaton has 2867 states and 10191 transitions. Word has length 2 [2022-11-16 11:01:10,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:01:10,090 INFO L495 AbstractCegarLoop]: Abstraction has 2867 states and 10191 transitions. [2022-11-16 11:01:10,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:01:10,091 INFO L276 IsEmpty]: Start isEmpty. Operand 2867 states and 10191 transitions. [2022-11-16 11:01:10,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 11:01:10,091 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:01:10,091 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 11:01:10,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-11-16 11:01:10,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:01:10,293 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:01:10,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:01:10,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1345343, now seen corresponding path program 1 times [2022-11-16 11:01:10,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:01:10,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2110305618] [2022-11-16 11:01:10,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:01:10,295 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:01:10,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:01:10,296 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:01:10,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-16 11:01:10,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:01:10,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 11:01:10,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:01:10,682 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:01:10,683 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:01:10,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:01:10,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:01:11,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:01:11,305 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:01:11,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2110305618] [2022-11-16 11:01:11,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2110305618] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:01:11,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:01:11,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-16 11:01:11,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665786764] [2022-11-16 11:01:11,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:01:11,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:01:11,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:01:11,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:01:11,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:01:11,308 INFO L87 Difference]: Start difference. First operand 2867 states and 10191 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:01:14,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:01:14,699 INFO L93 Difference]: Finished difference Result 8590 states and 30557 transitions. [2022-11-16 11:01:14,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:01:14,701 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 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 [2022-11-16 11:01:14,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:01:14,789 INFO L225 Difference]: With dead ends: 8590 [2022-11-16 11:01:14,789 INFO L226 Difference]: Without dead ends: 8590 [2022-11-16 11:01:14,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:01:14,799 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 353 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:01:14,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 0 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-16 11:01:14,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8590 states. [2022-11-16 11:01:15,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8590 to 2876. [2022-11-16 11:01:15,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2876 states, 2202 states have (on average 4.638964577656676) internal successors, (10215), 2875 states have internal predecessors, (10215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:01:15,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2876 states to 2876 states and 10215 transitions. [2022-11-16 11:01:15,233 INFO L78 Accepts]: Start accepts. Automaton has 2876 states and 10215 transitions. Word has length 3 [2022-11-16 11:01:15,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:01:15,233 INFO L495 AbstractCegarLoop]: Abstraction has 2876 states and 10215 transitions. [2022-11-16 11:01:15,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:01:15,234 INFO L276 IsEmpty]: Start isEmpty. Operand 2876 states and 10215 transitions. [2022-11-16 11:01:15,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 11:01:15,235 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:01:15,235 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 11:01:15,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:01:15,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:01:15,449 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:01:15,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:01:15,449 INFO L85 PathProgramCache]: Analyzing trace with hash 41772707, now seen corresponding path program 1 times [2022-11-16 11:01:15,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:01:15,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [502825120] [2022-11-16 11:01:15,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:01:15,451 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:01:15,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:01:15,454 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:01:15,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-16 11:01:15,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:01:15,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:01:15,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:01:15,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:01:15,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:01:15,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:01:15,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:01:15,819 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-16 11:01:15,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-11-16 11:01:15,859 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-16 11:01:15,859 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:01:15,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:01:15,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 11:01:16,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:01:16,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 11:01:16,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:01:16,059 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:01:16,059 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:01:16,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [502825120] [2022-11-16 11:01:16,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [502825120] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:01:16,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:01:16,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:01:16,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918884999] [2022-11-16 11:01:16,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:01:16,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:01:16,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:01:16,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:01:16,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:01:16,061 INFO L87 Difference]: Start difference. First operand 2876 states and 10215 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:01:16,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:01:16,626 INFO L93 Difference]: Finished difference Result 2315 states and 7970 transitions. [2022-11-16 11:01:16,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:01:16,627 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2022-11-16 11:01:16,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:01:16,640 INFO L225 Difference]: With dead ends: 2315 [2022-11-16 11:01:16,640 INFO L226 Difference]: Without dead ends: 2315 [2022-11-16 11:01:16,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:01:16,642 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 108 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:01:16,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 0 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 2 Unchecked, 0.5s Time] [2022-11-16 11:01:16,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2022-11-16 11:01:16,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 2315. [2022-11-16 11:01:16,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2315 states, 1817 states have (on average 4.386351128233351) internal successors, (7970), 2314 states have internal predecessors, (7970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:01:16,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2315 states to 2315 states and 7970 transitions. [2022-11-16 11:01:16,765 INFO L78 Accepts]: Start accepts. Automaton has 2315 states and 7970 transitions. Word has length 4 [2022-11-16 11:01:16,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:01:16,765 INFO L495 AbstractCegarLoop]: Abstraction has 2315 states and 7970 transitions. [2022-11-16 11:01:16,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:01:16,766 INFO L276 IsEmpty]: Start isEmpty. Operand 2315 states and 7970 transitions. [2022-11-16 11:01:16,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 11:01:16,766 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:01:16,766 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 11:01:16,799 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-11-16 11:01:16,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:01:16,967 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:01:16,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:01:16,967 INFO L85 PathProgramCache]: Analyzing trace with hash 41772708, now seen corresponding path program 1 times [2022-11-16 11:01:16,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:01:16,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2142408232] [2022-11-16 11:01:16,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:01:16,968 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:01:16,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:01:16,970 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:01:16,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-16 11:01:17,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:01:17,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:01:17,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:01:17,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:01:17,270 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-16 11:01:17,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-11-16 11:01:17,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:01:17,753 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:01:17,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2022-11-16 11:01:18,222 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-11-16 11:01:18,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 76 [2022-11-16 11:01:18,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:01:18,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:01:18,847 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:01:18,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2142408232] [2022-11-16 11:01:18,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2142408232] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:01:18,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:01:18,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:01:18,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398600680] [2022-11-16 11:01:18,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:01:18,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:01:18,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:01:18,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:01:18,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:01:18,849 INFO L87 Difference]: Start difference. First operand 2315 states and 7970 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:01:19,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:01:19,261 INFO L93 Difference]: Finished difference Result 2317 states and 7974 transitions. [2022-11-16 11:01:19,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:01:19,262 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2022-11-16 11:01:19,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:01:19,276 INFO L225 Difference]: With dead ends: 2317 [2022-11-16 11:01:19,276 INFO L226 Difference]: Without dead ends: 2317 [2022-11-16 11:01:19,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:01:19,277 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:01:19,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 57 Unchecked, 0.4s Time] [2022-11-16 11:01:19,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2022-11-16 11:01:19,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 2317. [2022-11-16 11:01:19,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 1819 states have (on average 4.383727322704783) internal successors, (7974), 2316 states have internal predecessors, (7974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:01:19,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 7974 transitions. [2022-11-16 11:01:19,365 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 7974 transitions. Word has length 4 [2022-11-16 11:01:19,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:01:19,366 INFO L495 AbstractCegarLoop]: Abstraction has 2317 states and 7974 transitions. [2022-11-16 11:01:19,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:01:19,366 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 7974 transitions. [2022-11-16 11:01:19,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 11:01:19,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:01:19,367 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 11:01:19,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:01:19,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:01:19,581 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:01:19,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:01:19,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1293113872, now seen corresponding path program 1 times [2022-11-16 11:01:19,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:01:19,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2145994394] [2022-11-16 11:01:19,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:01:19,582 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:01:19,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:01:19,583 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:01:19,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-16 11:01:19,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:01:19,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:01:19,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:01:19,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:01:19,884 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-16 11:01:19,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-11-16 11:01:19,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:01:19,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:01:20,053 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:01:20,054 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-11-16 11:01:20,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:01:20,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:01:20,073 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:01:20,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2145994394] [2022-11-16 11:01:20,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2145994394] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:01:20,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:01:20,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:01:20,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389510260] [2022-11-16 11:01:20,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:01:20,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:01:20,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:01:20,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:01:20,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:01:20,075 INFO L87 Difference]: Start difference. First operand 2317 states and 7974 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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) [2022-11-16 11:01:20,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:01:20,558 INFO L93 Difference]: Finished difference Result 1756 states and 5729 transitions. [2022-11-16 11:01:20,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:01:20,564 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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 5 [2022-11-16 11:01:20,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:01:20,581 INFO L225 Difference]: With dead ends: 1756 [2022-11-16 11:01:20,581 INFO L226 Difference]: Without dead ends: 1756 [2022-11-16 11:01:20,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:01:20,582 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 52 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:01:20,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 0 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 1 Unchecked, 0.5s Time] [2022-11-16 11:01:20,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2022-11-16 11:01:20,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1754. [2022-11-16 11:01:20,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1754 states, 1432 states have (on average 3.997905027932961) internal successors, (5725), 1753 states have internal predecessors, (5725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:01:20,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1754 states to 1754 states and 5725 transitions. [2022-11-16 11:01:20,688 INFO L78 Accepts]: Start accepts. Automaton has 1754 states and 5725 transitions. Word has length 5 [2022-11-16 11:01:20,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:01:20,688 INFO L495 AbstractCegarLoop]: Abstraction has 1754 states and 5725 transitions. [2022-11-16 11:01:20,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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) [2022-11-16 11:01:20,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1754 states and 5725 transitions. [2022-11-16 11:01:20,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 11:01:20,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:01:20,689 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-16 11:01:20,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:01:20,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:01:20,903 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:01:20,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:01:20,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1429922771, now seen corresponding path program 2 times [2022-11-16 11:01:20,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:01:20,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [578190608] [2022-11-16 11:01:20,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:01:20,904 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:01:20,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:01:20,905 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:01:20,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-16 11:01:21,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:01:21,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:01:21,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:01:21,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:01:21,212 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:01:21,213 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:01:21,437 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:01:21,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:01:22,491 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:01:22,491 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:01:22,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [578190608] [2022-11-16 11:01:22,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [578190608] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:01:22,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:01:22,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 11:01:22,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248238021] [2022-11-16 11:01:22,492 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:01:22,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:01:22,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:01:22,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:01:22,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:01:22,493 INFO L87 Difference]: Start difference. First operand 1754 states and 5725 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 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) [2022-11-16 11:01:27,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:01:28,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:01:30,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:01:32,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:01:34,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:01:36,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:01:38,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:01:40,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:01:45,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:01:45,871 INFO L93 Difference]: Finished difference Result 12177 states and 39897 transitions. [2022-11-16 11:01:45,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:01:45,872 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 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 6 [2022-11-16 11:01:45,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:01:45,957 INFO L225 Difference]: With dead ends: 12177 [2022-11-16 11:01:45,957 INFO L226 Difference]: Without dead ends: 12177 [2022-11-16 11:01:45,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:01:45,959 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 920 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1509 mSolverCounterSat, 149 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 920 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1509 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:01:45,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [920 Valid, 0 Invalid, 1663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1509 Invalid, 5 Unknown, 0 Unchecked, 21.6s Time] [2022-11-16 11:01:45,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12177 states. [2022-11-16 11:01:46,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12177 to 1767. [2022-11-16 11:01:46,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1767 states, 1445 states have (on average 3.979930795847751) internal successors, (5751), 1766 states have internal predecessors, (5751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:01:46,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1767 states to 1767 states and 5751 transitions. [2022-11-16 11:01:46,217 INFO L78 Accepts]: Start accepts. Automaton has 1767 states and 5751 transitions. Word has length 6 [2022-11-16 11:01:46,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:01:46,218 INFO L495 AbstractCegarLoop]: Abstraction has 1767 states and 5751 transitions. [2022-11-16 11:01:46,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 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) [2022-11-16 11:01:46,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1767 states and 5751 transitions. [2022-11-16 11:01:46,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 11:01:46,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:01:46,219 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 11:01:46,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:01:46,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:01:46,432 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:01:46,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:01:46,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1488897479, now seen corresponding path program 1 times [2022-11-16 11:01:46,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:01:46,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1813828676] [2022-11-16 11:01:46,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:01:46,434 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:01:46,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:01:46,435 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:01:46,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-16 11:01:46,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:01:46,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:01:46,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:01:46,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:01:46,704 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-16 11:01:46,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2022-11-16 11:01:46,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:01:46,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:01:46,876 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:01:46,877 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-11-16 11:01:46,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:01:46,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:01:46,926 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:01:46,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1813828676] [2022-11-16 11:01:46,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1813828676] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:01:46,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:01:46,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:01:46,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276064316] [2022-11-16 11:01:46,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:01:46,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:01:46,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:01:46,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:01:46,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:01:46,929 INFO L87 Difference]: Start difference. First operand 1767 states and 5751 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:01:47,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:01:47,370 INFO L93 Difference]: Finished difference Result 1701 states and 5563 transitions. [2022-11-16 11:01:47,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:01:47,370 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-11-16 11:01:47,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:01:47,379 INFO L225 Difference]: With dead ends: 1701 [2022-11-16 11:01:47,379 INFO L226 Difference]: Without dead ends: 1701 [2022-11-16 11:01:47,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:01:47,380 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 98 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:01:47,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 0 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 1 Unchecked, 0.4s Time] [2022-11-16 11:01:47,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2022-11-16 11:01:47,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1701. [2022-11-16 11:01:47,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1701 states, 1411 states have (on average 3.942593905031892) internal successors, (5563), 1700 states have internal predecessors, (5563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:01:47,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 5563 transitions. [2022-11-16 11:01:47,439 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 5563 transitions. Word has length 6 [2022-11-16 11:01:47,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:01:47,439 INFO L495 AbstractCegarLoop]: Abstraction has 1701 states and 5563 transitions. [2022-11-16 11:01:47,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:01:47,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 5563 transitions. [2022-11-16 11:01:47,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 11:01:47,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:01:47,443 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 11:01:47,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-11-16 11:01:47,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:01:47,659 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:01:47,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:01:47,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1488897481, now seen corresponding path program 1 times [2022-11-16 11:01:47,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:01:47,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [844955239] [2022-11-16 11:01:47,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:01:47,660 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:01:47,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:01:47,661 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:01:47,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-16 11:01:47,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:01:47,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:01:47,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:01:47,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:01:47,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:01:47,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:01:48,012 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-16 11:01:48,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-16 11:01:48,034 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 12 [2022-11-16 11:01:48,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:01:48,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 11:01:48,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:01:48,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 11:01:48,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:01:48,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:01:48,204 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:01:48,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [844955239] [2022-11-16 11:01:48,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [844955239] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:01:48,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:01:48,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:01:48,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61976812] [2022-11-16 11:01:48,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:01:48,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:01:48,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:01:48,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:01:48,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:01:48,206 INFO L87 Difference]: Start difference. First operand 1701 states and 5563 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:01:48,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:01:48,670 INFO L93 Difference]: Finished difference Result 1635 states and 5375 transitions. [2022-11-16 11:01:48,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:01:48,670 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-11-16 11:01:48,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:01:48,677 INFO L225 Difference]: With dead ends: 1635 [2022-11-16 11:01:48,677 INFO L226 Difference]: Without dead ends: 1635 [2022-11-16 11:01:48,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:01:48,680 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 48 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:01:48,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 0 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 2 Unchecked, 0.5s Time] [2022-11-16 11:01:48,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2022-11-16 11:01:48,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1635. [2022-11-16 11:01:48,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1635 states, 1377 states have (on average 3.9034132171387075) internal successors, (5375), 1634 states have internal predecessors, (5375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:01:48,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 5375 transitions. [2022-11-16 11:01:48,758 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 5375 transitions. Word has length 6 [2022-11-16 11:01:48,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:01:48,758 INFO L495 AbstractCegarLoop]: Abstraction has 1635 states and 5375 transitions. [2022-11-16 11:01:48,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:01:48,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 5375 transitions. [2022-11-16 11:01:48,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:01:48,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:01:48,759 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:01:48,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:01:48,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:01:48,973 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:01:48,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:01:48,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1088818289, now seen corresponding path program 1 times [2022-11-16 11:01:48,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:01:48,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [459654544] [2022-11-16 11:01:48,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:01:48,975 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:01:48,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:01:48,977 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:01:48,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-16 11:01:49,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:01:49,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:01:49,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:01:49,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:01:49,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:01:49,182 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:01:49,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [459654544] [2022-11-16 11:01:49,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [459654544] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:01:49,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:01:49,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:01:49,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211487353] [2022-11-16 11:01:49,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:01:49,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:01:49,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:01:49,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:01:49,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:01:49,183 INFO L87 Difference]: Start difference. First operand 1635 states and 5375 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:01:49,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:01:49,982 INFO L93 Difference]: Finished difference Result 1731 states and 5590 transitions. [2022-11-16 11:01:49,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:01:49,983 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2022-11-16 11:01:49,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:01:49,989 INFO L225 Difference]: With dead ends: 1731 [2022-11-16 11:01:49,989 INFO L226 Difference]: Without dead ends: 1723 [2022-11-16 11:01:49,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:01:49,990 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 19 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:01:49,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 0 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:01:49,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1723 states. [2022-11-16 11:01:50,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1723 to 1721. [2022-11-16 11:01:50,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1721 states, 1457 states have (on average 3.822923816060398) internal successors, (5570), 1720 states have internal predecessors, (5570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:01:50,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1721 states to 1721 states and 5570 transitions. [2022-11-16 11:01:50,051 INFO L78 Accepts]: Start accepts. Automaton has 1721 states and 5570 transitions. Word has length 7 [2022-11-16 11:01:50,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:01:50,052 INFO L495 AbstractCegarLoop]: Abstraction has 1721 states and 5570 transitions. [2022-11-16 11:01:50,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:01:50,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1721 states and 5570 transitions. [2022-11-16 11:01:50,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:01:50,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:01:50,053 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:01:50,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-16 11:01:50,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:01:50,268 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:01:50,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:01:50,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1594636451, now seen corresponding path program 1 times [2022-11-16 11:01:50,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:01:50,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [905737419] [2022-11-16 11:01:50,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:01:50,269 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:01:50,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:01:50,271 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:01:50,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-16 11:01:50,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:01:50,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:01:50,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:01:50,576 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:01:50,576 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:01:50,622 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:01:50,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 11:01:50,648 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:01:50,649 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-11-16 11:01:50,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:01:50,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:01:50,672 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:01:50,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [905737419] [2022-11-16 11:01:50,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [905737419] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:01:50,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:01:50,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:01:50,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129623663] [2022-11-16 11:01:50,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:01:50,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:01:50,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:01:50,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:01:50,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:01:50,674 INFO L87 Difference]: Start difference. First operand 1721 states and 5570 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) 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) [2022-11-16 11:01:51,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:01:51,090 INFO L93 Difference]: Finished difference Result 1271 states and 4056 transitions. [2022-11-16 11:01:51,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:01:51,090 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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 [2022-11-16 11:01:51,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:01:51,095 INFO L225 Difference]: With dead ends: 1271 [2022-11-16 11:01:51,095 INFO L226 Difference]: Without dead ends: 1271 [2022-11-16 11:01:51,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:01:51,096 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 84 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:01:51,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 0 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:01:51,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2022-11-16 11:01:51,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 1271. [2022-11-16 11:01:51,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1271 states, 1112 states have (on average 3.647482014388489) internal successors, (4056), 1270 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:01:51,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 4056 transitions. [2022-11-16 11:01:51,135 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 4056 transitions. Word has length 8 [2022-11-16 11:01:51,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:01:51,136 INFO L495 AbstractCegarLoop]: Abstraction has 1271 states and 4056 transitions. [2022-11-16 11:01:51,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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) [2022-11-16 11:01:51,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 4056 transitions. [2022-11-16 11:01:51,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:01:51,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:01:51,138 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:01:51,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-11-16 11:01:51,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:01:51,351 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:01:51,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:01:51,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1594636452, now seen corresponding path program 1 times [2022-11-16 11:01:51,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:01:51,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2754512] [2022-11-16 11:01:51,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:01:51,353 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:01:51,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:01:51,354 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:01:51,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-16 11:01:51,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:01:51,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:01:51,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:01:51,747 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:01:51,748 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:01:51,912 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:01:51,913 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:01:52,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:01:52,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:01:52,159 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:01:52,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 11:01:52,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:01:52,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:01:52,243 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:01:52,246 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-16 11:01:52,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:01:52,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:02:02,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:02:02,178 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:02:02,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2754512] [2022-11-16 11:02:02,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2754512] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:02:02,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:02:02,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:02:02,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55536450] [2022-11-16 11:02:02,178 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:02:02,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:02:02,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:02:02,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:02:02,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:02:02,180 INFO L87 Difference]: Start difference. First operand 1271 states and 4056 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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) [2022-11-16 11:02:02,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:02:02,796 INFO L93 Difference]: Finished difference Result 1294 states and 4102 transitions. [2022-11-16 11:02:02,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:02:02,797 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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 8 [2022-11-16 11:02:02,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:02:02,802 INFO L225 Difference]: With dead ends: 1294 [2022-11-16 11:02:02,802 INFO L226 Difference]: Without dead ends: 1294 [2022-11-16 11:02:02,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:02:02,804 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 12 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 224 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:02:02,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 0 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 87 Invalid, 0 Unknown, 224 Unchecked, 0.6s Time] [2022-11-16 11:02:02,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2022-11-16 11:02:02,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 1283. [2022-11-16 11:02:02,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1124 states have (on average 3.6343416370106763) internal successors, (4085), 1282 states have internal predecessors, (4085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:02:02,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 4085 transitions. [2022-11-16 11:02:02,845 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 4085 transitions. Word has length 8 [2022-11-16 11:02:02,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:02:02,845 INFO L495 AbstractCegarLoop]: Abstraction has 1283 states and 4085 transitions. [2022-11-16 11:02:02,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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) [2022-11-16 11:02:02,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 4085 transitions. [2022-11-16 11:02:02,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:02:02,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:02:02,847 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:02:02,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-16 11:02:03,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:02:03,062 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:02:03,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:02:03,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1594636430, now seen corresponding path program 1 times [2022-11-16 11:02:03,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:02:03,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [376309227] [2022-11-16 11:02:03,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:02:03,063 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:02:03,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:02:03,065 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:02:03,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-16 11:02:03,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:02:03,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:02:03,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:02:03,254 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-16 11:02:03,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:02:03,290 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:02:03,290 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:02:03,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [376309227] [2022-11-16 11:02:03,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [376309227] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:02:03,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:02:03,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:02:03,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282008213] [2022-11-16 11:02:03,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:02:03,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:02:03,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:02:03,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:02:03,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:02:03,292 INFO L87 Difference]: Start difference. First operand 1283 states and 4085 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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) [2022-11-16 11:02:03,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:02:03,754 INFO L93 Difference]: Finished difference Result 1031 states and 3239 transitions. [2022-11-16 11:02:03,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:02:03,755 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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 [2022-11-16 11:02:03,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:02:03,758 INFO L225 Difference]: With dead ends: 1031 [2022-11-16 11:02:03,758 INFO L226 Difference]: Without dead ends: 1031 [2022-11-16 11:02:03,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:02:03,760 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 77 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:02:03,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 0 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:02:03,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2022-11-16 11:02:03,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 1031. [2022-11-16 11:02:03,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 919 states have (on average 3.5244831338411315) internal successors, (3239), 1030 states have internal predecessors, (3239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:02:03,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 3239 transitions. [2022-11-16 11:02:03,793 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 3239 transitions. Word has length 8 [2022-11-16 11:02:03,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:02:03,793 INFO L495 AbstractCegarLoop]: Abstraction has 1031 states and 3239 transitions. [2022-11-16 11:02:03,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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) [2022-11-16 11:02:03,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 3239 transitions. [2022-11-16 11:02:03,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:02:03,795 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:02:03,795 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:02:03,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-16 11:02:04,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:02:04,010 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:02:04,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:02:04,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1594636431, now seen corresponding path program 1 times [2022-11-16 11:02:04,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:02:04,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [860294023] [2022-11-16 11:02:04,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:02:04,011 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:02:04,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:02:04,014 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:02:04,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-16 11:02:04,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:02:04,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:02:04,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:02:04,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:02:04,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:02:04,188 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:02:04,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [860294023] [2022-11-16 11:02:04,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [860294023] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:02:04,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:02:04,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:02:04,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003633529] [2022-11-16 11:02:04,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:02:04,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:02:04,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:02:04,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:02:04,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:02:04,191 INFO L87 Difference]: Start difference. First operand 1031 states and 3239 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) [2022-11-16 11:02:04,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:02:04,809 INFO L93 Difference]: Finished difference Result 1427 states and 4556 transitions. [2022-11-16 11:02:04,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:02:04,810 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 [2022-11-16 11:02:04,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:02:04,814 INFO L225 Difference]: With dead ends: 1427 [2022-11-16 11:02:04,814 INFO L226 Difference]: Without dead ends: 1427 [2022-11-16 11:02:04,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:02:04,815 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:02:04,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 0 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 11:02:04,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2022-11-16 11:02:04,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 1153. [2022-11-16 11:02:04,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 1029 states have (on average 3.687074829931973) internal successors, (3794), 1152 states have internal predecessors, (3794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:02:04,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 3794 transitions. [2022-11-16 11:02:04,854 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 3794 transitions. Word has length 8 [2022-11-16 11:02:04,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:02:04,855 INFO L495 AbstractCegarLoop]: Abstraction has 1153 states and 3794 transitions. [2022-11-16 11:02:04,855 INFO L496 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) [2022-11-16 11:02:04,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 3794 transitions. [2022-11-16 11:02:04,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:02:04,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:02:04,856 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:02:04,870 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-11-16 11:02:05,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:02:05,070 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:02:05,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:02:05,071 INFO L85 PathProgramCache]: Analyzing trace with hash 606401364, now seen corresponding path program 1 times [2022-11-16 11:02:05,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:02:05,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1359939220] [2022-11-16 11:02:05,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:02:05,072 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:02:05,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:02:05,074 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:02:05,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-16 11:02:05,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:02:05,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 11:02:05,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:02:05,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:02:05,490 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-16 11:02:05,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-16 11:02:05,518 INFO L350 Elim1Store]: Elim1 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 60 treesize of output 58 [2022-11-16 11:02:05,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:02:05,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 11:02:05,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:02:05,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 11:02:05,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:02:05,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:02:05,858 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:02:05,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1359939220] [2022-11-16 11:02:05,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1359939220] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:02:05,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:02:05,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:02:05,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957113563] [2022-11-16 11:02:05,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:02:05,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:02:05,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:02:05,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:02:05,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:02:05,860 INFO L87 Difference]: Start difference. First operand 1153 states and 3794 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2022-11-16 11:02:06,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:02:06,303 INFO L93 Difference]: Finished difference Result 1101 states and 3655 transitions. [2022-11-16 11:02:06,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:02:06,305 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 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 [2022-11-16 11:02:06,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:02:06,309 INFO L225 Difference]: With dead ends: 1101 [2022-11-16 11:02:06,309 INFO L226 Difference]: Without dead ends: 1101 [2022-11-16 11:02:06,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:02:06,310 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 115 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:02:06,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 0 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 4 Unchecked, 0.4s Time] [2022-11-16 11:02:06,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2022-11-16 11:02:06,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 1101. [2022-11-16 11:02:06,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 998 states have (on average 3.662324649298597) internal successors, (3655), 1100 states have internal predecessors, (3655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:02:06,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 3655 transitions. [2022-11-16 11:02:06,347 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 3655 transitions. Word has length 8 [2022-11-16 11:02:06,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:02:06,348 INFO L495 AbstractCegarLoop]: Abstraction has 1101 states and 3655 transitions. [2022-11-16 11:02:06,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2022-11-16 11:02:06,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 3655 transitions. [2022-11-16 11:02:06,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:02:06,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:02:06,349 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:02:06,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-16 11:02:06,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:02:06,563 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:02:06,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:02:06,563 INFO L85 PathProgramCache]: Analyzing trace with hash 606401363, now seen corresponding path program 1 times [2022-11-16 11:02:06,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:02:06,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1074073691] [2022-11-16 11:02:06,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:02:06,564 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:02:06,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:02:06,566 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:02:06,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-16 11:02:06,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:02:06,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:02:06,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:02:06,827 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 11:02:06,827 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-16 11:02:06,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:02:06,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:02:06,975 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:02:06,975 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-11-16 11:02:07,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:02:07,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:02:07,067 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:02:07,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1074073691] [2022-11-16 11:02:07,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1074073691] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:02:07,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:02:07,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:02:07,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524274696] [2022-11-16 11:02:07,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:02:07,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:02:07,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:02:07,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:02:07,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:02:07,069 INFO L87 Difference]: Start difference. First operand 1101 states and 3655 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) 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) [2022-11-16 11:02:07,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:02:07,545 INFO L93 Difference]: Finished difference Result 1111 states and 3675 transitions. [2022-11-16 11:02:07,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:02:07,546 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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 [2022-11-16 11:02:07,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:02:07,551 INFO L225 Difference]: With dead ends: 1111 [2022-11-16 11:02:07,551 INFO L226 Difference]: Without dead ends: 1111 [2022-11-16 11:02:07,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:02:07,554 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:02:07,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 43 Unchecked, 0.4s Time] [2022-11-16 11:02:07,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2022-11-16 11:02:07,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 1111. [2022-11-16 11:02:07,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1111 states, 1008 states have (on average 3.6458333333333335) internal successors, (3675), 1110 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:02:07,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 3675 transitions. [2022-11-16 11:02:07,599 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 3675 transitions. Word has length 8 [2022-11-16 11:02:07,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:02:07,599 INFO L495 AbstractCegarLoop]: Abstraction has 1111 states and 3675 transitions. [2022-11-16 11:02:07,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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) [2022-11-16 11:02:07,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 3675 transitions. [2022-11-16 11:02:07,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:02:07,601 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:02:07,601 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:02:07,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-16 11:02:07,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:02:07,816 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:02:07,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:02:07,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1117612680, now seen corresponding path program 1 times [2022-11-16 11:02:07,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:02:07,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1655270906] [2022-11-16 11:02:07,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:02:07,817 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:02:07,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:02:07,819 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:02:07,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-16 11:02:08,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:02:08,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 11:02:08,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:02:08,336 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:02:08,336 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:02:08,550 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:02:08,550 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:02:08,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:02:08,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-11-16 11:02:08,908 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:02:08,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 11:02:08,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:02:08,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-11-16 11:02:09,027 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:02:09,027 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-16 11:02:09,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:02:09,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:02:22,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:02:22,082 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:02:22,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1655270906] [2022-11-16 11:02:22,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1655270906] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:02:22,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:02:22,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 11:02:22,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025809502] [2022-11-16 11:02:22,083 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:02:22,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:02:22,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:02:22,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:02:22,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=97, Unknown=1, NotChecked=0, Total=132 [2022-11-16 11:02:22,085 INFO L87 Difference]: Start difference. First operand 1111 states and 3675 transitions. Second operand has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:02:23,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:02:23,233 INFO L93 Difference]: Finished difference Result 1117 states and 3686 transitions. [2022-11-16 11:02:23,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:02:23,234 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 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 9 [2022-11-16 11:02:23,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:02:23,237 INFO L225 Difference]: With dead ends: 1117 [2022-11-16 11:02:23,237 INFO L226 Difference]: Without dead ends: 1117 [2022-11-16 11:02:23,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=41, Invalid=114, Unknown=1, NotChecked=0, Total=156 [2022-11-16 11:02:23,238 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:02:23,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 168 Unchecked, 0.7s Time] [2022-11-16 11:02:23,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2022-11-16 11:02:23,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 1111. [2022-11-16 11:02:23,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1111 states, 1008 states have (on average 3.6458333333333335) internal successors, (3675), 1110 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:02:23,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 3675 transitions. [2022-11-16 11:02:23,295 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 3675 transitions. Word has length 9 [2022-11-16 11:02:23,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:02:23,295 INFO L495 AbstractCegarLoop]: Abstraction has 1111 states and 3675 transitions. [2022-11-16 11:02:23,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:02:23,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 3675 transitions. [2022-11-16 11:02:23,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:02:23,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:02:23,296 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:02:23,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-16 11:02:23,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:02:23,511 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:02:23,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:02:23,512 INFO L85 PathProgramCache]: Analyzing trace with hash -2143063068, now seen corresponding path program 1 times [2022-11-16 11:02:23,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:02:23,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1066807288] [2022-11-16 11:02:23,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:02:23,513 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:02:23,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:02:23,515 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:02:23,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-16 11:02:23,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:02:23,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-16 11:02:23,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:02:24,015 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:02:24,015 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:02:24,266 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:02:24,267 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:02:24,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:02:24,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:02:24,548 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:02:24,549 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-16 11:02:24,664 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 11:02:24,664 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 22 [2022-11-16 11:02:25,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:02:25,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:02:30,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:02:30,364 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:02:30,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1066807288] [2022-11-16 11:02:30,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1066807288] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:02:30,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:02:30,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2022-11-16 11:02:30,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428792030] [2022-11-16 11:02:30,365 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:02:30,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 11:02:30,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:02:30,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 11:02:30,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:02:30,366 INFO L87 Difference]: Start difference. First operand 1111 states and 3675 transitions. Second operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:02:31,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:02:31,057 INFO L93 Difference]: Finished difference Result 1127 states and 3704 transitions. [2022-11-16 11:02:31,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:02:31,057 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 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 9 [2022-11-16 11:02:31,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:02:31,061 INFO L225 Difference]: With dead ends: 1127 [2022-11-16 11:02:31,061 INFO L226 Difference]: Without dead ends: 1127 [2022-11-16 11:02:31,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:02:31,061 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 4 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:02:31,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 0 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 131 Invalid, 0 Unknown, 146 Unchecked, 0.7s Time] [2022-11-16 11:02:31,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2022-11-16 11:02:31,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 1120. [2022-11-16 11:02:31,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1017 states have (on average 3.631268436578171) internal successors, (3693), 1119 states have internal predecessors, (3693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:02:31,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 3693 transitions. [2022-11-16 11:02:31,110 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 3693 transitions. Word has length 9 [2022-11-16 11:02:31,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:02:31,110 INFO L495 AbstractCegarLoop]: Abstraction has 1120 states and 3693 transitions. [2022-11-16 11:02:31,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:02:31,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 3693 transitions. [2022-11-16 11:02:31,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:02:31,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:02:31,112 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:02:31,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-16 11:02:31,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:02:31,327 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:02:31,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:02:31,328 INFO L85 PathProgramCache]: Analyzing trace with hash -2105876026, now seen corresponding path program 1 times [2022-11-16 11:02:31,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:02:31,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1987831994] [2022-11-16 11:02:31,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:02:31,328 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:02:31,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:02:31,330 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:02:31,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-16 11:02:31,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:02:31,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:02:31,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:02:31,852 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:02:31,853 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:02:32,084 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:02:32,085 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:02:32,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:02:32,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:02:32,324 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:02:32,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 11:02:32,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:02:32,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:02:32,439 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:02:32,439 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-16 11:02:32,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:02:32,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:02:39,289 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 34 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:02:45,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:02:45,447 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:02:45,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1987831994] [2022-11-16 11:02:45,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1987831994] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:02:45,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:02:45,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:02:45,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682649663] [2022-11-16 11:02:45,448 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:02:45,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:02:45,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:02:45,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:02:45,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:02:45,450 INFO L87 Difference]: Start difference. First operand 1120 states and 3693 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:02:45,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:02:45,990 INFO L93 Difference]: Finished difference Result 1141 states and 3726 transitions. [2022-11-16 11:02:45,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:02:45,991 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 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 9 [2022-11-16 11:02:45,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:02:45,995 INFO L225 Difference]: With dead ends: 1141 [2022-11-16 11:02:45,995 INFO L226 Difference]: Without dead ends: 1141 [2022-11-16 11:02:45,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:02:45,996 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:02:45,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 178 Unchecked, 0.5s Time] [2022-11-16 11:02:45,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2022-11-16 11:02:46,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 1128. [2022-11-16 11:02:46,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 1025 states have (on average 3.622439024390244) internal successors, (3713), 1127 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:02:46,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 3713 transitions. [2022-11-16 11:02:46,030 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 3713 transitions. Word has length 9 [2022-11-16 11:02:46,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:02:46,031 INFO L495 AbstractCegarLoop]: Abstraction has 1128 states and 3713 transitions. [2022-11-16 11:02:46,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:02:46,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 3713 transitions. [2022-11-16 11:02:46,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:02:46,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:02:46,032 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:02:46,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-11-16 11:02:46,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:02:46,247 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:02:46,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:02:46,248 INFO L85 PathProgramCache]: Analyzing trace with hash 77676062, now seen corresponding path program 1 times [2022-11-16 11:02:46,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:02:46,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1312456075] [2022-11-16 11:02:46,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:02:46,248 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:02:46,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:02:46,250 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:02:46,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-16 11:02:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:02:46,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:02:46,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:02:46,774 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:02:46,775 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:02:46,979 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:02:46,980 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:02:47,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:02:47,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:02:47,242 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:02:47,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 11:02:47,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:02:47,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:02:47,366 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:02:47,366 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-16 11:02:47,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:02:47,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:02:59,672 WARN L233 SmtUtils]: Spent 6.20s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:02:59,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:02:59,673 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:02:59,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1312456075] [2022-11-16 11:02:59,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1312456075] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:02:59,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:02:59,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:02:59,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267330226] [2022-11-16 11:02:59,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:02:59,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:02:59,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:02:59,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:02:59,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=64, Unknown=1, NotChecked=0, Total=90 [2022-11-16 11:02:59,675 INFO L87 Difference]: Start difference. First operand 1128 states and 3713 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:00,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:03:00,350 INFO L93 Difference]: Finished difference Result 1157 states and 3770 transitions. [2022-11-16 11:03:00,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:03:00,350 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 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 9 [2022-11-16 11:03:00,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:03:00,354 INFO L225 Difference]: With dead ends: 1157 [2022-11-16 11:03:00,354 INFO L226 Difference]: Without dead ends: 1157 [2022-11-16 11:03:00,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=25, Invalid=64, Unknown=1, NotChecked=0, Total=90 [2022-11-16 11:03:00,355 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:03:00,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 113 Invalid, 0 Unknown, 130 Unchecked, 0.7s Time] [2022-11-16 11:03:00,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2022-11-16 11:03:00,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 1146. [2022-11-16 11:03:00,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1043 states have (on average 3.5963566634707576) internal successors, (3751), 1145 states have internal predecessors, (3751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:00,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 3751 transitions. [2022-11-16 11:03:00,387 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 3751 transitions. Word has length 9 [2022-11-16 11:03:00,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:03:00,387 INFO L495 AbstractCegarLoop]: Abstraction has 1146 states and 3751 transitions. [2022-11-16 11:03:00,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:00,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 3751 transitions. [2022-11-16 11:03:00,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:03:00,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:03:00,389 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:03:00,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-16 11:03:00,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:03:00,602 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:03:00,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:03:00,603 INFO L85 PathProgramCache]: Analyzing trace with hash 464924011, now seen corresponding path program 1 times [2022-11-16 11:03:00,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:03:00,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [186037629] [2022-11-16 11:03:00,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:03:00,603 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:03:00,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:03:00,604 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:03:00,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-16 11:03:00,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:03:00,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:03:00,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:03:00,959 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 11:03:00,959 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-16 11:03:01,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:03:01,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:03:01,118 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:03:01,118 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-11-16 11:03:01,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:03:01,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:03:01,221 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:03:01,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [186037629] [2022-11-16 11:03:01,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [186037629] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:03:01,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:03:01,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:03:01,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776923172] [2022-11-16 11:03:01,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:03:01,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:03:01,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:03:01,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:03:01,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:03:01,224 INFO L87 Difference]: Start difference. First operand 1146 states and 3751 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:01,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:03:01,692 INFO L93 Difference]: Finished difference Result 1172 states and 3803 transitions. [2022-11-16 11:03:01,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:03:01,693 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-11-16 11:03:01,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:03:01,697 INFO L225 Difference]: With dead ends: 1172 [2022-11-16 11:03:01,697 INFO L226 Difference]: Without dead ends: 1172 [2022-11-16 11:03:01,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:03:01,698 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:03:01,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 43 Unchecked, 0.4s Time] [2022-11-16 11:03:01,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2022-11-16 11:03:01,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 1164. [2022-11-16 11:03:01,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1164 states, 1061 states have (on average 3.5692742695570217) internal successors, (3787), 1163 states have internal predecessors, (3787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:01,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1164 states to 1164 states and 3787 transitions. [2022-11-16 11:03:01,727 INFO L78 Accepts]: Start accepts. Automaton has 1164 states and 3787 transitions. Word has length 9 [2022-11-16 11:03:01,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:03:01,727 INFO L495 AbstractCegarLoop]: Abstraction has 1164 states and 3787 transitions. [2022-11-16 11:03:01,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:01,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1164 states and 3787 transitions. [2022-11-16 11:03:01,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:03:01,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:03:01,729 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:03:01,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-11-16 11:03:01,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:03:01,942 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:03:01,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:03:01,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1617686756, now seen corresponding path program 1 times [2022-11-16 11:03:01,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:03:01,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [493547890] [2022-11-16 11:03:01,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:03:01,943 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:03:01,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:03:01,944 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:03:01,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-16 11:03:02,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:03:02,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:03:02,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:03:02,267 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 11:03:02,267 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-16 11:03:02,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:03:02,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:03:02,404 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:03:02,405 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-11-16 11:03:02,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:03:02,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:03:02,536 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:03:02,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [493547890] [2022-11-16 11:03:02,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [493547890] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:03:02,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:03:02,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:03:02,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944016724] [2022-11-16 11:03:02,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:03:02,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:03:02,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:03:02,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:03:02,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:03:02,538 INFO L87 Difference]: Start difference. First operand 1164 states and 3787 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:03,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:03:03,020 INFO L93 Difference]: Finished difference Result 1178 states and 3823 transitions. [2022-11-16 11:03:03,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:03:03,021 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-11-16 11:03:03,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:03:03,025 INFO L225 Difference]: With dead ends: 1178 [2022-11-16 11:03:03,025 INFO L226 Difference]: Without dead ends: 1178 [2022-11-16 11:03:03,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:03:03,026 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:03:03,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 44 Unchecked, 0.4s Time] [2022-11-16 11:03:03,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2022-11-16 11:03:03,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 1178. [2022-11-16 11:03:03,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 1075 states have (on average 3.556279069767442) internal successors, (3823), 1177 states have internal predecessors, (3823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:03,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 3823 transitions. [2022-11-16 11:03:03,057 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 3823 transitions. Word has length 9 [2022-11-16 11:03:03,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:03:03,058 INFO L495 AbstractCegarLoop]: Abstraction has 1178 states and 3823 transitions. [2022-11-16 11:03:03,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:03,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 3823 transitions. [2022-11-16 11:03:03,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:03:03,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:03:03,059 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:03:03,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-16 11:03:03,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:03:03,269 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:03:03,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:03:03,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1618568985, now seen corresponding path program 1 times [2022-11-16 11:03:03,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:03:03,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1098087689] [2022-11-16 11:03:03,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:03:03,270 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:03:03,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:03:03,272 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:03:03,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-16 11:03:03,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:03:03,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:03:03,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:03:03,583 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 11:03:03,583 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-16 11:03:03,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:03:03,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:03:03,718 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:03:03,719 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-11-16 11:03:03,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:03:03,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:03:03,826 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:03:03,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1098087689] [2022-11-16 11:03:03,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1098087689] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:03:03,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:03:03,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:03:03,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131671295] [2022-11-16 11:03:03,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:03:03,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:03:03,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:03:03,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:03:03,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:03:03,828 INFO L87 Difference]: Start difference. First operand 1178 states and 3823 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:04,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:03:04,260 INFO L93 Difference]: Finished difference Result 1180 states and 3831 transitions. [2022-11-16 11:03:04,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:03:04,261 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-11-16 11:03:04,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:03:04,265 INFO L225 Difference]: With dead ends: 1180 [2022-11-16 11:03:04,265 INFO L226 Difference]: Without dead ends: 1180 [2022-11-16 11:03:04,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:03:04,265 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:03:04,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 43 Unchecked, 0.4s Time] [2022-11-16 11:03:04,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2022-11-16 11:03:04,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 1180. [2022-11-16 11:03:04,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1077 states have (on average 3.5571030640668524) internal successors, (3831), 1179 states have internal predecessors, (3831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:04,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3831 transitions. [2022-11-16 11:03:04,293 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3831 transitions. Word has length 9 [2022-11-16 11:03:04,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:03:04,294 INFO L495 AbstractCegarLoop]: Abstraction has 1180 states and 3831 transitions. [2022-11-16 11:03:04,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:04,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3831 transitions. [2022-11-16 11:03:04,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:03:04,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:03:04,295 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:03:04,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-16 11:03:04,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:03:04,505 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:03:04,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:03:04,506 INFO L85 PathProgramCache]: Analyzing trace with hash 588360305, now seen corresponding path program 1 times [2022-11-16 11:03:04,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:03:04,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [768207636] [2022-11-16 11:03:04,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:03:04,507 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:03:04,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:03:04,508 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:03:04,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-16 11:03:04,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:03:04,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:03:04,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:03:04,960 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 11:03:04,961 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-16 11:03:05,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:03:05,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:03:05,119 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:03:05,119 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-11-16 11:03:05,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:03:05,253 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:03:05,253 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:03:05,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [768207636] [2022-11-16 11:03:05,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [768207636] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:03:05,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:03:05,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:03:05,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018109889] [2022-11-16 11:03:05,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:03:05,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:03:05,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:03:05,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:03:05,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:03:05,255 INFO L87 Difference]: Start difference. First operand 1180 states and 3831 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:05,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:03:05,718 INFO L93 Difference]: Finished difference Result 1188 states and 3847 transitions. [2022-11-16 11:03:05,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:03:05,719 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-11-16 11:03:05,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:03:05,723 INFO L225 Difference]: With dead ends: 1188 [2022-11-16 11:03:05,723 INFO L226 Difference]: Without dead ends: 1188 [2022-11-16 11:03:05,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:03:05,724 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:03:05,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 43 Unchecked, 0.4s Time] [2022-11-16 11:03:05,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2022-11-16 11:03:05,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 1176. [2022-11-16 11:03:05,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1073 states have (on average 3.564771668219944) internal successors, (3825), 1175 states have internal predecessors, (3825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:05,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 3825 transitions. [2022-11-16 11:03:05,747 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 3825 transitions. Word has length 9 [2022-11-16 11:03:05,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:03:05,748 INFO L495 AbstractCegarLoop]: Abstraction has 1176 states and 3825 transitions. [2022-11-16 11:03:05,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:05,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 3825 transitions. [2022-11-16 11:03:05,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:03:05,748 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:03:05,748 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:03:05,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-16 11:03:05,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:03:05,949 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:03:05,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:03:05,950 INFO L85 PathProgramCache]: Analyzing trace with hash 702015012, now seen corresponding path program 2 times [2022-11-16 11:03:05,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:03:05,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [312461272] [2022-11-16 11:03:05,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:03:05,951 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:03:05,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:03:05,952 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:03:05,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-16 11:03:06,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:03:06,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:03:06,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 11:03:06,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:03:06,400 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:03:06,400 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:03:06,624 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:03:06,624 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:03:06,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:03:06,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:03:06,813 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:03:06,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 11:03:06,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:03:06,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:03:06,894 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:03:06,895 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-16 11:03:07,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:03:07,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:03:07,177 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:03:07,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [312461272] [2022-11-16 11:03:07,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [312461272] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:03:07,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:03:07,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:03:07,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101019488] [2022-11-16 11:03:07,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:03:07,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:03:07,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:03:07,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:03:07,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:03:07,179 INFO L87 Difference]: Start difference. First operand 1176 states and 3825 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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) [2022-11-16 11:03:07,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:03:07,827 INFO L93 Difference]: Finished difference Result 1188 states and 3847 transitions. [2022-11-16 11:03:07,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:03:07,828 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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 10 [2022-11-16 11:03:07,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:03:07,831 INFO L225 Difference]: With dead ends: 1188 [2022-11-16 11:03:07,831 INFO L226 Difference]: Without dead ends: 1188 [2022-11-16 11:03:07,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:03:07,832 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:03:07,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 81 Unchecked, 0.6s Time] [2022-11-16 11:03:07,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2022-11-16 11:03:07,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 1167. [2022-11-16 11:03:07,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 1064 states have (on average 3.575187969924812) internal successors, (3804), 1166 states have internal predecessors, (3804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:07,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 3804 transitions. [2022-11-16 11:03:07,858 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 3804 transitions. Word has length 10 [2022-11-16 11:03:07,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:03:07,858 INFO L495 AbstractCegarLoop]: Abstraction has 1167 states and 3804 transitions. [2022-11-16 11:03:07,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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) [2022-11-16 11:03:07,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 3804 transitions. [2022-11-16 11:03:07,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:03:07,859 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:03:07,859 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:03:07,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-11-16 11:03:08,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:03:08,060 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:03:08,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:03:08,060 INFO L85 PathProgramCache]: Analyzing trace with hash -323435528, now seen corresponding path program 2 times [2022-11-16 11:03:08,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:03:08,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1596525867] [2022-11-16 11:03:08,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:03:08,061 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:03:08,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:03:08,062 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:03:08,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-16 11:03:08,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:03:08,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:03:08,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:03:08,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:03:08,531 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:03:08,532 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:03:08,749 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:03:08,749 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:03:08,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:03:08,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:03:08,966 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:03:08,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 11:03:09,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:03:09,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:03:09,053 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:03:09,053 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-16 11:03:09,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:03:09,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:03:09,147 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:03:09,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1596525867] [2022-11-16 11:03:09,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1596525867] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:03:09,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:03:09,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:03:09,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192037659] [2022-11-16 11:03:09,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:03:09,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:03:09,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:03:09,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:03:09,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:03:09,149 INFO L87 Difference]: Start difference. First operand 1167 states and 3804 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:09,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:03:09,733 INFO L93 Difference]: Finished difference Result 847 states and 2602 transitions. [2022-11-16 11:03:09,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:03:09,734 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 10 [2022-11-16 11:03:09,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:03:09,737 INFO L225 Difference]: With dead ends: 847 [2022-11-16 11:03:09,737 INFO L226 Difference]: Without dead ends: 847 [2022-11-16 11:03:09,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:03:09,738 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 69 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:03:09,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 0 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 11:03:09,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2022-11-16 11:03:09,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 811. [2022-11-16 11:03:09,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 761 states have (on average 3.320630749014455) internal successors, (2527), 810 states have internal predecessors, (2527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:09,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 2527 transitions. [2022-11-16 11:03:09,769 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 2527 transitions. Word has length 10 [2022-11-16 11:03:09,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:03:09,769 INFO L495 AbstractCegarLoop]: Abstraction has 811 states and 2527 transitions. [2022-11-16 11:03:09,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:09,770 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 2527 transitions. [2022-11-16 11:03:09,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:03:09,770 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:03:09,771 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:03:09,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-16 11:03:09,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:03:09,971 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:03:09,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:03:09,973 INFO L85 PathProgramCache]: Analyzing trace with hash -856770873, now seen corresponding path program 1 times [2022-11-16 11:03:09,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:03:09,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1466020900] [2022-11-16 11:03:09,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:03:09,974 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:03:09,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:03:09,975 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:03:10,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-16 11:03:10,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:03:10,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:03:10,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:03:10,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:03:10,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:03:10,204 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:03:10,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1466020900] [2022-11-16 11:03:10,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1466020900] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:03:10,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:03:10,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:03:10,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840712722] [2022-11-16 11:03:10,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:03:10,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:03:10,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:03:10,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:03:10,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:03:10,206 INFO L87 Difference]: Start difference. First operand 811 states and 2527 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:10,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:03:10,742 INFO L93 Difference]: Finished difference Result 687 states and 2028 transitions. [2022-11-16 11:03:10,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:03:10,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2022-11-16 11:03:10,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:03:10,745 INFO L225 Difference]: With dead ends: 687 [2022-11-16 11:03:10,745 INFO L226 Difference]: Without dead ends: 687 [2022-11-16 11:03:10,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:03:10,746 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 19 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:03:10,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 0 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:03:10,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2022-11-16 11:03:10,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 687. [2022-11-16 11:03:10,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 637 states have (on average 3.183673469387755) internal successors, (2028), 686 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:10,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 2028 transitions. [2022-11-16 11:03:10,762 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 2028 transitions. Word has length 10 [2022-11-16 11:03:10,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:03:10,763 INFO L495 AbstractCegarLoop]: Abstraction has 687 states and 2028 transitions. [2022-11-16 11:03:10,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:10,763 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 2028 transitions. [2022-11-16 11:03:10,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:03:10,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:03:10,764 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:03:10,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-16 11:03:10,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:03:10,964 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:03:10,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:03:10,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1526856140, now seen corresponding path program 1 times [2022-11-16 11:03:10,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:03:10,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1588599794] [2022-11-16 11:03:10,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:03:10,966 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:03:10,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:03:10,968 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:03:10,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-16 11:03:11,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:03:11,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:03:11,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:03:11,398 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 11:03:11,399 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-16 11:03:11,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:03:11,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:03:11,555 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:03:11,555 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-11-16 11:03:11,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:03:11,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:03:11,697 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:03:11,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1588599794] [2022-11-16 11:03:11,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1588599794] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:03:11,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:03:11,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:03:11,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407246121] [2022-11-16 11:03:11,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:03:11,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:03:11,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:03:11,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:03:11,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:03:11,699 INFO L87 Difference]: Start difference. First operand 687 states and 2028 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:12,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:03:12,123 INFO L93 Difference]: Finished difference Result 701 states and 2058 transitions. [2022-11-16 11:03:12,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:03:12,124 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2022-11-16 11:03:12,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:03:12,126 INFO L225 Difference]: With dead ends: 701 [2022-11-16 11:03:12,126 INFO L226 Difference]: Without dead ends: 701 [2022-11-16 11:03:12,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:03:12,127 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:03:12,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 40 Unchecked, 0.4s Time] [2022-11-16 11:03:12,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-11-16 11:03:12,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 695. [2022-11-16 11:03:12,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 645 states have (on average 3.1689922480620156) internal successors, (2044), 694 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:12,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 2044 transitions. [2022-11-16 11:03:12,145 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 2044 transitions. Word has length 10 [2022-11-16 11:03:12,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:03:12,146 INFO L495 AbstractCegarLoop]: Abstraction has 695 states and 2044 transitions. [2022-11-16 11:03:12,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:12,146 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 2044 transitions. [2022-11-16 11:03:12,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:03:12,147 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:03:12,147 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:03:12,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-16 11:03:12,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:03:12,363 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:03:12,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:03:12,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1527738369, now seen corresponding path program 1 times [2022-11-16 11:03:12,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:03:12,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1594260308] [2022-11-16 11:03:12,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:03:12,364 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:03:12,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:03:12,366 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:03:12,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-16 11:03:12,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:03:12,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:03:12,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:03:12,772 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 11:03:12,772 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-16 11:03:12,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:03:12,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:03:12,905 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:03:12,905 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-11-16 11:03:13,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:03:13,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:03:13,015 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:03:13,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1594260308] [2022-11-16 11:03:13,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1594260308] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:03:13,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:03:13,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:03:13,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513195846] [2022-11-16 11:03:13,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:03:13,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:03:13,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:03:13,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:03:13,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:03:13,017 INFO L87 Difference]: Start difference. First operand 695 states and 2044 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:13,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:03:13,446 INFO L93 Difference]: Finished difference Result 697 states and 2048 transitions. [2022-11-16 11:03:13,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:03:13,447 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2022-11-16 11:03:13,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:03:13,449 INFO L225 Difference]: With dead ends: 697 [2022-11-16 11:03:13,449 INFO L226 Difference]: Without dead ends: 697 [2022-11-16 11:03:13,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:03:13,450 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:03:13,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 40 Unchecked, 0.4s Time] [2022-11-16 11:03:13,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2022-11-16 11:03:13,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 687. [2022-11-16 11:03:13,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 637 states have (on average 3.183673469387755) internal successors, (2028), 686 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:13,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 2028 transitions. [2022-11-16 11:03:13,467 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 2028 transitions. Word has length 10 [2022-11-16 11:03:13,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:03:13,467 INFO L495 AbstractCegarLoop]: Abstraction has 687 states and 2028 transitions. [2022-11-16 11:03:13,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:13,467 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 2028 transitions. [2022-11-16 11:03:13,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:03:13,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:03:13,469 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:03:13,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-11-16 11:03:13,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:03:13,685 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:03:13,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:03:13,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1391322200, now seen corresponding path program 1 times [2022-11-16 11:03:13,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:03:13,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [172571145] [2022-11-16 11:03:13,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:03:13,686 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:03:13,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:03:13,687 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:03:13,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-16 11:03:13,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:03:13,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:03:13,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:03:14,026 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 11:03:14,027 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-16 11:03:14,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:03:14,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:03:14,151 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:03:14,151 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-11-16 11:03:14,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:03:14,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:03:14,270 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:03:14,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [172571145] [2022-11-16 11:03:14,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [172571145] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:03:14,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:03:14,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:03:14,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93148076] [2022-11-16 11:03:14,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:03:14,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:03:14,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:03:14,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:03:14,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:03:14,272 INFO L87 Difference]: Start difference. First operand 687 states and 2028 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:14,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:03:14,693 INFO L93 Difference]: Finished difference Result 705 states and 2066 transitions. [2022-11-16 11:03:14,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:03:14,694 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2022-11-16 11:03:14,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:03:14,696 INFO L225 Difference]: With dead ends: 705 [2022-11-16 11:03:14,696 INFO L226 Difference]: Without dead ends: 705 [2022-11-16 11:03:14,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:03:14,697 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:03:14,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 40 Unchecked, 0.4s Time] [2022-11-16 11:03:14,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2022-11-16 11:03:14,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 705. [2022-11-16 11:03:14,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 655 states have (on average 3.1541984732824426) internal successors, (2066), 704 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:14,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2066 transitions. [2022-11-16 11:03:14,730 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2066 transitions. Word has length 10 [2022-11-16 11:03:14,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:03:14,730 INFO L495 AbstractCegarLoop]: Abstraction has 705 states and 2066 transitions. [2022-11-16 11:03:14,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:14,731 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2066 transitions. [2022-11-16 11:03:14,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:03:14,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:03:14,732 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:03:14,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-11-16 11:03:14,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:03:14,934 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:03:14,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:03:14,935 INFO L85 PathProgramCache]: Analyzing trace with hash -94348787, now seen corresponding path program 1 times [2022-11-16 11:03:14,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:03:14,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [821797900] [2022-11-16 11:03:14,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:03:14,936 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:03:14,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:03:14,937 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:03:14,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-16 11:03:15,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:03:15,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:03:15,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:03:15,350 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 11:03:15,351 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-16 11:03:15,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:03:15,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:03:15,526 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:03:15,526 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-11-16 11:03:15,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:03:15,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:03:15,645 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:03:15,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [821797900] [2022-11-16 11:03:15,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [821797900] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:03:15,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:03:15,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:03:15,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478448186] [2022-11-16 11:03:15,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:03:15,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:03:15,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:03:15,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:03:15,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:03:15,647 INFO L87 Difference]: Start difference. First operand 705 states and 2066 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:16,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:03:16,046 INFO L93 Difference]: Finished difference Result 703 states and 2060 transitions. [2022-11-16 11:03:16,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:03:16,047 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2022-11-16 11:03:16,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:03:16,050 INFO L225 Difference]: With dead ends: 703 [2022-11-16 11:03:16,050 INFO L226 Difference]: Without dead ends: 703 [2022-11-16 11:03:16,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:03:16,051 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:03:16,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 40 Unchecked, 0.4s Time] [2022-11-16 11:03:16,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-11-16 11:03:16,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 695. [2022-11-16 11:03:16,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 645 states have (on average 3.1689922480620156) internal successors, (2044), 694 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:16,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 2044 transitions. [2022-11-16 11:03:16,064 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 2044 transitions. Word has length 10 [2022-11-16 11:03:16,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:03:16,065 INFO L495 AbstractCegarLoop]: Abstraction has 695 states and 2044 transitions. [2022-11-16 11:03:16,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:16,065 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 2044 transitions. [2022-11-16 11:03:16,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:03:16,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:03:16,066 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:03:16,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-16 11:03:16,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:03:16,270 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:03:16,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:03:16,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1058413958, now seen corresponding path program 1 times [2022-11-16 11:03:16,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:03:16,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1667969283] [2022-11-16 11:03:16,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:03:16,271 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:03:16,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:03:16,272 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:03:16,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-16 11:03:16,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:03:16,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:03:16,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:03:16,628 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 11:03:16,628 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-16 11:03:16,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:03:16,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:03:16,776 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:03:16,777 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-11-16 11:03:16,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:03:16,887 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:03:16,887 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:03:16,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1667969283] [2022-11-16 11:03:16,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1667969283] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:03:16,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:03:16,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:03:16,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561669950] [2022-11-16 11:03:16,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:03:16,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:03:16,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:03:16,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:03:16,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:03:16,889 INFO L87 Difference]: Start difference. First operand 695 states and 2044 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:17,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:03:17,310 INFO L93 Difference]: Finished difference Result 709 states and 2074 transitions. [2022-11-16 11:03:17,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:03:17,311 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2022-11-16 11:03:17,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:03:17,313 INFO L225 Difference]: With dead ends: 709 [2022-11-16 11:03:17,314 INFO L226 Difference]: Without dead ends: 709 [2022-11-16 11:03:17,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:03:17,315 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:03:17,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 40 Unchecked, 0.4s Time] [2022-11-16 11:03:17,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-11-16 11:03:17,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 703. [2022-11-16 11:03:17,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 653 states have (on average 3.1546707503828486) internal successors, (2060), 702 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:17,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 2060 transitions. [2022-11-16 11:03:17,333 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 2060 transitions. Word has length 10 [2022-11-16 11:03:17,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:03:17,333 INFO L495 AbstractCegarLoop]: Abstraction has 703 states and 2060 transitions. [2022-11-16 11:03:17,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:17,334 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 2060 transitions. [2022-11-16 11:03:17,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:03:17,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:03:17,335 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:03:17,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-11-16 11:03:17,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:03:17,550 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:03:17,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:03:17,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1059296187, now seen corresponding path program 1 times [2022-11-16 11:03:17,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:03:17,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1961641190] [2022-11-16 11:03:17,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:03:17,551 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:03:17,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:03:17,552 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:03:17,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-16 11:03:17,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:03:17,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:03:17,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:03:17,918 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 11:03:17,918 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-16 11:03:18,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:03:18,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:03:18,108 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:03:18,109 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-11-16 11:03:18,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:03:18,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:03:18,226 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:03:18,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1961641190] [2022-11-16 11:03:18,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1961641190] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:03:18,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:03:18,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:03:18,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012611992] [2022-11-16 11:03:18,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:03:18,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:03:18,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:03:18,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:03:18,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:03:18,228 INFO L87 Difference]: Start difference. First operand 703 states and 2060 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:18,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:03:18,645 INFO L93 Difference]: Finished difference Result 705 states and 2064 transitions. [2022-11-16 11:03:18,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:03:18,646 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2022-11-16 11:03:18,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:03:18,648 INFO L225 Difference]: With dead ends: 705 [2022-11-16 11:03:18,648 INFO L226 Difference]: Without dead ends: 705 [2022-11-16 11:03:18,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:03:18,649 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:03:18,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 40 Unchecked, 0.4s Time] [2022-11-16 11:03:18,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2022-11-16 11:03:18,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 695. [2022-11-16 11:03:18,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 645 states have (on average 3.1689922480620156) internal successors, (2044), 694 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:18,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 2044 transitions. [2022-11-16 11:03:18,661 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 2044 transitions. Word has length 10 [2022-11-16 11:03:18,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:03:18,662 INFO L495 AbstractCegarLoop]: Abstraction has 695 states and 2044 transitions. [2022-11-16 11:03:18,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:18,662 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 2044 transitions. [2022-11-16 11:03:18,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:03:18,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:03:18,663 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:03:18,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-16 11:03:18,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:03:18,866 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:03:18,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:03:18,866 INFO L85 PathProgramCache]: Analyzing trace with hash -821989830, now seen corresponding path program 1 times [2022-11-16 11:03:18,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:03:18,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1646447828] [2022-11-16 11:03:18,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:03:18,867 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:03:18,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:03:18,868 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:03:18,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-16 11:03:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:03:19,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:03:19,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:03:19,364 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:03:19,364 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:03:19,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:03:19,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:03:19,556 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:03:19,557 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:03:19,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:03:19,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:03:19,852 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:03:19,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1646447828] [2022-11-16 11:03:19,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1646447828] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:03:19,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:03:19,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:03:19,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824388168] [2022-11-16 11:03:19,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:03:19,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:03:19,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:03:19,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:03:19,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:03:19,854 INFO L87 Difference]: Start difference. First operand 695 states and 2044 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:20,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:03:20,262 INFO L93 Difference]: Finished difference Result 698 states and 2048 transitions. [2022-11-16 11:03:20,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:03:20,263 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-16 11:03:20,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:03:20,265 INFO L225 Difference]: With dead ends: 698 [2022-11-16 11:03:20,265 INFO L226 Difference]: Without dead ends: 698 [2022-11-16 11:03:20,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:03:20,266 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:03:20,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 75 Unchecked, 0.4s Time] [2022-11-16 11:03:20,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-11-16 11:03:20,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 698. [2022-11-16 11:03:20,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 648 states have (on average 3.1604938271604937) internal successors, (2048), 697 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:20,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 2048 transitions. [2022-11-16 11:03:20,285 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 2048 transitions. Word has length 11 [2022-11-16 11:03:20,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:03:20,285 INFO L495 AbstractCegarLoop]: Abstraction has 698 states and 2048 transitions. [2022-11-16 11:03:20,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:20,286 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 2048 transitions. [2022-11-16 11:03:20,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:03:20,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:03:20,287 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:03:20,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-16 11:03:20,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:03:20,503 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:03:20,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:03:20,503 INFO L85 PathProgramCache]: Analyzing trace with hash -817443990, now seen corresponding path program 2 times [2022-11-16 11:03:20,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:03:20,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1368512141] [2022-11-16 11:03:20,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:03:20,504 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:03:20,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:03:20,507 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:03:20,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-16 11:03:20,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:03:20,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:03:20,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:03:20,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:03:20,958 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:03:20,959 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:03:21,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:03:21,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:03:21,134 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:03:21,135 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:03:21,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:03:21,384 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:03:21,384 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:03:21,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1368512141] [2022-11-16 11:03:21,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1368512141] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:03:21,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:03:21,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:03:21,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302061504] [2022-11-16 11:03:21,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:03:21,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:03:21,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:03:21,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:03:21,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:03:21,386 INFO L87 Difference]: Start difference. First operand 698 states and 2048 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:21,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:03:21,781 INFO L93 Difference]: Finished difference Result 701 states and 2054 transitions. [2022-11-16 11:03:21,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:03:21,782 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-16 11:03:21,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:03:21,784 INFO L225 Difference]: With dead ends: 701 [2022-11-16 11:03:21,784 INFO L226 Difference]: Without dead ends: 701 [2022-11-16 11:03:21,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:03:21,785 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:03:21,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 42 Unchecked, 0.4s Time] [2022-11-16 11:03:21,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-11-16 11:03:21,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 698. [2022-11-16 11:03:21,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 648 states have (on average 3.1604938271604937) internal successors, (2048), 697 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:21,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 2048 transitions. [2022-11-16 11:03:21,800 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 2048 transitions. Word has length 11 [2022-11-16 11:03:21,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:03:21,801 INFO L495 AbstractCegarLoop]: Abstraction has 698 states and 2048 transitions. [2022-11-16 11:03:21,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:21,801 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 2048 transitions. [2022-11-16 11:03:21,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:03:21,801 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:03:21,801 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:03:21,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-16 11:03:22,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:03:22,002 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:03:22,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:03:22,003 INFO L85 PathProgramCache]: Analyzing trace with hash -817438503, now seen corresponding path program 1 times [2022-11-16 11:03:22,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:03:22,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1509266453] [2022-11-16 11:03:22,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:03:22,003 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:03:22,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:03:22,004 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:03:22,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-16 11:03:22,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:03:22,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:03:22,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:03:22,487 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:03:22,488 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:03:22,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:03:22,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:03:22,648 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:03:22,649 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:03:22,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:03:22,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:03:22,921 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:03:22,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1509266453] [2022-11-16 11:03:22,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1509266453] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:03:22,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:03:22,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:03:22,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989018624] [2022-11-16 11:03:22,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:03:22,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:03:22,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:03:22,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:03:22,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:03:22,924 INFO L87 Difference]: Start difference. First operand 698 states and 2048 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:23,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:03:23,351 INFO L93 Difference]: Finished difference Result 703 states and 2056 transitions. [2022-11-16 11:03:23,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:03:23,352 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-16 11:03:23,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:03:23,354 INFO L225 Difference]: With dead ends: 703 [2022-11-16 11:03:23,354 INFO L226 Difference]: Without dead ends: 703 [2022-11-16 11:03:23,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:03:23,355 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:03:23,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 71 Unchecked, 0.4s Time] [2022-11-16 11:03:23,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-11-16 11:03:23,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 699. [2022-11-16 11:03:23,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 649 states have (on average 3.1587057010785826) internal successors, (2050), 698 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:23,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2050 transitions. [2022-11-16 11:03:23,366 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2050 transitions. Word has length 11 [2022-11-16 11:03:23,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:03:23,367 INFO L495 AbstractCegarLoop]: Abstraction has 699 states and 2050 transitions. [2022-11-16 11:03:23,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:23,367 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2050 transitions. [2022-11-16 11:03:23,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:03:23,368 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:03:23,368 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:03:23,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-16 11:03:23,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:03:23,570 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:03:23,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:03:23,571 INFO L85 PathProgramCache]: Analyzing trace with hash -817377030, now seen corresponding path program 3 times [2022-11-16 11:03:23,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:03:23,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [928717127] [2022-11-16 11:03:23,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:03:23,572 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:03:23,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:03:23,573 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:03:23,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-16 11:03:23,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 11:03:23,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:03:23,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:03:23,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:03:23,972 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:03:23,973 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:03:24,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:03:24,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:03:24,137 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:03:24,138 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:03:24,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:03:24,440 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:03:24,441 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:03:24,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [928717127] [2022-11-16 11:03:24,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [928717127] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:03:24,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:03:24,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:03:24,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963007410] [2022-11-16 11:03:24,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:03:24,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:03:24,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:03:24,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:03:24,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:03:24,443 INFO L87 Difference]: Start difference. First operand 699 states and 2050 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:24,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:03:24,872 INFO L93 Difference]: Finished difference Result 952 states and 2927 transitions. [2022-11-16 11:03:24,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:03:24,873 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-16 11:03:24,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:03:24,876 INFO L225 Difference]: With dead ends: 952 [2022-11-16 11:03:24,876 INFO L226 Difference]: Without dead ends: 952 [2022-11-16 11:03:24,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:03:24,877 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 35 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:03:24,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 0 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 105 Unchecked, 0.4s Time] [2022-11-16 11:03:24,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2022-11-16 11:03:24,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 706. [2022-11-16 11:03:24,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 656 states have (on average 3.144817073170732) internal successors, (2063), 705 states have internal predecessors, (2063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:24,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2063 transitions. [2022-11-16 11:03:24,897 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2063 transitions. Word has length 11 [2022-11-16 11:03:24,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:03:24,898 INFO L495 AbstractCegarLoop]: Abstraction has 706 states and 2063 transitions. [2022-11-16 11:03:24,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:24,898 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2063 transitions. [2022-11-16 11:03:24,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:03:24,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:03:24,899 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:03:24,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-16 11:03:25,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:03:25,119 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:03:25,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:03:25,120 INFO L85 PathProgramCache]: Analyzing trace with hash -817206933, now seen corresponding path program 2 times [2022-11-16 11:03:25,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:03:25,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2127189637] [2022-11-16 11:03:25,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:03:25,120 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:03:25,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:03:25,121 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:03:25,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-16 11:03:25,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:03:25,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:03:25,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:03:25,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:03:25,492 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:03:25,493 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:03:25,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:03:25,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:03:25,661 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:03:25,661 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:03:25,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:03:25,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:03:25,900 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:03:25,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2127189637] [2022-11-16 11:03:25,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2127189637] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:03:25,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:03:25,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:03:25,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761597782] [2022-11-16 11:03:25,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:03:25,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:03:25,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:03:25,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:03:25,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:03:25,902 INFO L87 Difference]: Start difference. First operand 706 states and 2063 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:26,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:03:26,272 INFO L93 Difference]: Finished difference Result 710 states and 2068 transitions. [2022-11-16 11:03:26,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:03:26,273 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-16 11:03:26,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:03:26,275 INFO L225 Difference]: With dead ends: 710 [2022-11-16 11:03:26,275 INFO L226 Difference]: Without dead ends: 710 [2022-11-16 11:03:26,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:03:26,276 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:03:26,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 43 Unchecked, 0.4s Time] [2022-11-16 11:03:26,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2022-11-16 11:03:26,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 707. [2022-11-16 11:03:26,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 657 states have (on average 3.141552511415525) internal successors, (2064), 706 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:26,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 2064 transitions. [2022-11-16 11:03:26,287 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 2064 transitions. Word has length 11 [2022-11-16 11:03:26,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:03:26,287 INFO L495 AbstractCegarLoop]: Abstraction has 707 states and 2064 transitions. [2022-11-16 11:03:26,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:26,288 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 2064 transitions. [2022-11-16 11:03:26,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:03:26,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:03:26,288 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:03:26,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-11-16 11:03:26,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:03:26,489 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:03:26,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:03:26,489 INFO L85 PathProgramCache]: Analyzing trace with hash -816716823, now seen corresponding path program 3 times [2022-11-16 11:03:26,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:03:26,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1891974043] [2022-11-16 11:03:26,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:03:26,490 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:03:26,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:03:26,491 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:03:26,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-16 11:03:26,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 11:03:26,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:03:26,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:03:26,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:03:26,878 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:03:26,879 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:03:26,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:03:26,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:03:27,030 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:03:27,031 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:03:27,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:03:27,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:03:27,277 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:03:27,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1891974043] [2022-11-16 11:03:27,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1891974043] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:03:27,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:03:27,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:03:27,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037302317] [2022-11-16 11:03:27,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:03:27,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:03:27,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:03:27,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:03:27,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:03:27,278 INFO L87 Difference]: Start difference. First operand 707 states and 2064 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:27,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:03:27,670 INFO L93 Difference]: Finished difference Result 710 states and 2068 transitions. [2022-11-16 11:03:27,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:03:27,671 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-16 11:03:27,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:03:27,672 INFO L225 Difference]: With dead ends: 710 [2022-11-16 11:03:27,673 INFO L226 Difference]: Without dead ends: 710 [2022-11-16 11:03:27,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:03:27,673 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:03:27,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 75 Unchecked, 0.4s Time] [2022-11-16 11:03:27,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2022-11-16 11:03:27,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 708. [2022-11-16 11:03:27,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 658 states have (on average 3.1382978723404253) internal successors, (2065), 707 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:27,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 2065 transitions. [2022-11-16 11:03:27,704 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 2065 transitions. Word has length 11 [2022-11-16 11:03:27,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:03:27,704 INFO L495 AbstractCegarLoop]: Abstraction has 708 states and 2065 transitions. [2022-11-16 11:03:27,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:27,705 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 2065 transitions. [2022-11-16 11:03:27,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:03:27,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:03:27,706 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1, 1, 1] [2022-11-16 11:03:27,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-11-16 11:03:27,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:03:27,922 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:03:27,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:03:27,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1814856457, now seen corresponding path program 1 times [2022-11-16 11:03:27,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:03:27,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1279867406] [2022-11-16 11:03:27,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:03:27,923 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:03:27,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:03:27,924 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:03:27,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-16 11:03:28,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:03:28,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:03:28,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:03:28,195 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 11:03:28,764 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:03:28,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:03:31,663 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:03:31,664 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:03:31,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1279867406] [2022-11-16 11:03:31,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1279867406] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:03:31,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:03:31,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-11-16 11:03:31,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152469630] [2022-11-16 11:03:31,665 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:03:31,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:03:31,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:03:31,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:03:31,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:03:31,666 INFO L87 Difference]: Start difference. First operand 708 states and 2065 transitions. Second operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:38,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:03:40,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:03:42,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:03:44,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:03:46,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:03:48,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:03:50,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:03:53,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:03:55,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:03:57,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:03:59,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:04:01,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:04:03,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:04:05,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:04:23,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:04:23,110 INFO L93 Difference]: Finished difference Result 9906 states and 30237 transitions. [2022-11-16 11:04:23,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 11:04:23,119 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 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 [2022-11-16 11:04:23,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:04:23,150 INFO L225 Difference]: With dead ends: 9906 [2022-11-16 11:04:23,150 INFO L226 Difference]: Without dead ends: 9906 [2022-11-16 11:04:23,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=223, Invalid=377, Unknown=0, NotChecked=0, Total=600 [2022-11-16 11:04:23,151 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2496 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2654 mSolverCounterSat, 261 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2496 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 2654 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:04:23,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2496 Valid, 0 Invalid, 2928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 2654 Invalid, 13 Unknown, 0 Unchecked, 44.3s Time] [2022-11-16 11:04:23,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9906 states. [2022-11-16 11:04:23,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9906 to 746. [2022-11-16 11:04:23,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 696 states have (on average 3.0761494252873565) internal successors, (2141), 745 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:23,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 2141 transitions. [2022-11-16 11:04:23,254 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 2141 transitions. Word has length 11 [2022-11-16 11:04:23,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:04:23,254 INFO L495 AbstractCegarLoop]: Abstraction has 746 states and 2141 transitions. [2022-11-16 11:04:23,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:23,255 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 2141 transitions. [2022-11-16 11:04:23,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:04:23,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:04:23,256 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:04:23,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-16 11:04:23,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:04:23,470 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:04:23,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:04:23,471 INFO L85 PathProgramCache]: Analyzing trace with hash 87896000, now seen corresponding path program 1 times [2022-11-16 11:04:23,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:04:23,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [401427991] [2022-11-16 11:04:23,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:23,471 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:04:23,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:04:23,473 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:04:23,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-16 11:04:23,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:23,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:04:23,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:04:23,872 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 11:04:23,872 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-16 11:04:23,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:04:23,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:04:24,013 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:04:24,013 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-11-16 11:04:24,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:04:24,154 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:04:24,154 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:04:24,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [401427991] [2022-11-16 11:04:24,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [401427991] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:04:24,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:04:24,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:04:24,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371872044] [2022-11-16 11:04:24,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:04:24,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:04:24,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:04:24,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:04:24,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:04:24,156 INFO L87 Difference]: Start difference. First operand 746 states and 2141 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:24,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:04:24,543 INFO L93 Difference]: Finished difference Result 764 states and 2179 transitions. [2022-11-16 11:04:24,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:04:24,544 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-16 11:04:24,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:04:24,547 INFO L225 Difference]: With dead ends: 764 [2022-11-16 11:04:24,547 INFO L226 Difference]: Without dead ends: 764 [2022-11-16 11:04:24,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:04:24,547 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:04:24,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 40 Unchecked, 0.4s Time] [2022-11-16 11:04:24,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-11-16 11:04:24,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 753. [2022-11-16 11:04:24,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 703 states have (on average 3.071123755334282) internal successors, (2159), 752 states have internal predecessors, (2159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:24,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2159 transitions. [2022-11-16 11:04:24,560 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2159 transitions. Word has length 11 [2022-11-16 11:04:24,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:04:24,560 INFO L495 AbstractCegarLoop]: Abstraction has 753 states and 2159 transitions. [2022-11-16 11:04:24,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:24,560 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2159 transitions. [2022-11-16 11:04:24,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:04:24,561 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:04:24,561 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:04:24,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-16 11:04:24,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:04:24,762 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:04:24,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:04:24,762 INFO L85 PathProgramCache]: Analyzing trace with hash 671541059, now seen corresponding path program 1 times [2022-11-16 11:04:24,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:04:24,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [194329803] [2022-11-16 11:04:24,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:24,763 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:04:24,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:04:24,764 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:04:24,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-16 11:04:24,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:24,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:04:24,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:04:25,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:25,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:04:25,020 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:04:25,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [194329803] [2022-11-16 11:04:25,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [194329803] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:04:25,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:04:25,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:04:25,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119478164] [2022-11-16 11:04:25,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:04:25,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:04:25,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:04:25,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:04:25,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:04:25,022 INFO L87 Difference]: Start difference. First operand 753 states and 2159 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:25,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:04:25,680 INFO L93 Difference]: Finished difference Result 689 states and 1828 transitions. [2022-11-16 11:04:25,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:04:25,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-16 11:04:25,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:04:25,682 INFO L225 Difference]: With dead ends: 689 [2022-11-16 11:04:25,682 INFO L226 Difference]: Without dead ends: 660 [2022-11-16 11:04:25,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:04:25,683 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 19 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:04:25,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 0 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:04:25,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2022-11-16 11:04:25,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 652. [2022-11-16 11:04:25,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 601 states have (on average 2.8935108153078204) internal successors, (1739), 651 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:25,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1739 transitions. [2022-11-16 11:04:25,698 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1739 transitions. Word has length 11 [2022-11-16 11:04:25,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:04:25,698 INFO L495 AbstractCegarLoop]: Abstraction has 652 states and 1739 transitions. [2022-11-16 11:04:25,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:25,699 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1739 transitions. [2022-11-16 11:04:25,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:04:25,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:04:25,700 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:04:25,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-16 11:04:25,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:04:25,916 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:04:25,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:04:25,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1369268586, now seen corresponding path program 1 times [2022-11-16 11:04:25,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:04:25,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [916507477] [2022-11-16 11:04:25,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:25,917 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:04:25,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:04:25,918 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:04:25,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-16 11:04:26,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:26,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:04:26,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:04:26,367 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 11:04:26,367 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-16 11:04:26,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:04:26,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:04:26,572 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:04:26,572 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-11-16 11:04:26,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:04:26,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:04:26,693 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:04:26,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [916507477] [2022-11-16 11:04:26,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [916507477] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:04:26,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:04:26,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:04:26,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065892461] [2022-11-16 11:04:26,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:04:26,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:04:26,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:04:26,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:04:26,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:04:26,696 INFO L87 Difference]: Start difference. First operand 652 states and 1739 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:27,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:04:27,078 INFO L93 Difference]: Finished difference Result 650 states and 1733 transitions. [2022-11-16 11:04:27,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:04:27,079 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-16 11:04:27,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:04:27,081 INFO L225 Difference]: With dead ends: 650 [2022-11-16 11:04:27,081 INFO L226 Difference]: Without dead ends: 650 [2022-11-16 11:04:27,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:04:27,082 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:04:27,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 40 Unchecked, 0.3s Time] [2022-11-16 11:04:27,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-11-16 11:04:27,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 644. [2022-11-16 11:04:27,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 593 states have (on average 2.900505902192243) internal successors, (1720), 643 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:27,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1720 transitions. [2022-11-16 11:04:27,094 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1720 transitions. Word has length 11 [2022-11-16 11:04:27,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:04:27,094 INFO L495 AbstractCegarLoop]: Abstraction has 644 states and 1720 transitions. [2022-11-16 11:04:27,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:27,095 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1720 transitions. [2022-11-16 11:04:27,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:04:27,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:04:27,096 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:04:27,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-11-16 11:04:27,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:04:27,309 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:04:27,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:04:27,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1370150815, now seen corresponding path program 1 times [2022-11-16 11:04:27,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:04:27,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [221549209] [2022-11-16 11:04:27,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:27,310 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:04:27,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:04:27,312 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:04:27,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-16 11:04:27,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:27,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:04:27,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:04:27,803 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 11:04:27,804 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-16 11:04:27,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:04:27,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:04:27,964 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:04:27,964 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-11-16 11:04:28,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:04:28,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:04:28,081 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:04:28,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [221549209] [2022-11-16 11:04:28,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [221549209] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:04:28,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:04:28,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:04:28,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225343772] [2022-11-16 11:04:28,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:04:28,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:04:28,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:04:28,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:04:28,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:04:28,083 INFO L87 Difference]: Start difference. First operand 644 states and 1720 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:28,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:04:28,494 INFO L93 Difference]: Finished difference Result 642 states and 1716 transitions. [2022-11-16 11:04:28,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:04:28,494 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-16 11:04:28,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:04:28,496 INFO L225 Difference]: With dead ends: 642 [2022-11-16 11:04:28,496 INFO L226 Difference]: Without dead ends: 642 [2022-11-16 11:04:28,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:04:28,497 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:04:28,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 40 Unchecked, 0.4s Time] [2022-11-16 11:04:28,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2022-11-16 11:04:28,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 632. [2022-11-16 11:04:28,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 581 states have (on average 2.9225473321858866) internal successors, (1698), 631 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:28,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 1698 transitions. [2022-11-16 11:04:28,512 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 1698 transitions. Word has length 11 [2022-11-16 11:04:28,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:04:28,513 INFO L495 AbstractCegarLoop]: Abstraction has 632 states and 1698 transitions. [2022-11-16 11:04:28,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:28,513 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 1698 transitions. [2022-11-16 11:04:28,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:04:28,514 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:04:28,514 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:04:28,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-11-16 11:04:28,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:04:28,722 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:04:28,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:04:28,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1548909754, now seen corresponding path program 1 times [2022-11-16 11:04:28,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:04:28,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1084905157] [2022-11-16 11:04:28,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:28,724 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:04:28,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:04:28,725 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:04:28,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-16 11:04:28,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:28,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:04:28,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:04:29,108 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 11:04:29,109 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-16 11:04:29,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:04:29,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:04:29,262 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:04:29,262 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-11-16 11:04:29,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:04:29,394 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:04:29,395 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:04:29,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1084905157] [2022-11-16 11:04:29,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1084905157] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:04:29,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:04:29,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:04:29,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100427722] [2022-11-16 11:04:29,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:04:29,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:04:29,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:04:29,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:04:29,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:04:29,397 INFO L87 Difference]: Start difference. First operand 632 states and 1698 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:29,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:04:29,891 INFO L93 Difference]: Finished difference Result 652 states and 1737 transitions. [2022-11-16 11:04:29,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:04:29,892 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-16 11:04:29,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:04:29,894 INFO L225 Difference]: With dead ends: 652 [2022-11-16 11:04:29,894 INFO L226 Difference]: Without dead ends: 643 [2022-11-16 11:04:29,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:04:29,895 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:04:29,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 40 Unchecked, 0.5s Time] [2022-11-16 11:04:29,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-11-16 11:04:29,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 632. [2022-11-16 11:04:29,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 581 states have (on average 2.9208261617900173) internal successors, (1697), 631 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:29,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 1697 transitions. [2022-11-16 11:04:29,910 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 1697 transitions. Word has length 11 [2022-11-16 11:04:29,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:04:29,910 INFO L495 AbstractCegarLoop]: Abstraction has 632 states and 1697 transitions. [2022-11-16 11:04:29,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:29,910 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 1697 transitions. [2022-11-16 11:04:29,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:04:29,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:04:29,911 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-16 11:04:29,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-16 11:04:30,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:04:30,126 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:04:30,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:04:30,127 INFO L85 PathProgramCache]: Analyzing trace with hash 58059859, now seen corresponding path program 3 times [2022-11-16 11:04:30,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:04:30,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [319306282] [2022-11-16 11:04:30,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:04:30,128 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:04:30,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:04:30,129 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:04:30,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-16 11:04:30,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 11:04:30,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:04:30,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:04:30,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:04:30,675 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:04:30,675 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:04:31,474 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:31,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:04:36,165 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:36,165 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:04:36,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [319306282] [2022-11-16 11:04:36,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [319306282] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:04:36,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:04:36,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-16 11:04:36,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835215442] [2022-11-16 11:04:36,166 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:04:36,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 11:04:36,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:04:36,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 11:04:36,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-16 11:04:36,169 INFO L87 Difference]: Start difference. First operand 632 states and 1697 transitions. Second operand has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:53,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:04:55,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:04:57,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:04:59,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:05:01,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:05:04,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:05:06,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:05:08,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:05:10,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:05:12,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:05:16,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:05:18,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:05:20,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:05:22,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:05:24,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:05:26,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:05:28,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:05:30,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:05:32,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:05:34,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:05:52,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:05:52,555 INFO L93 Difference]: Finished difference Result 6690 states and 19227 transitions. [2022-11-16 11:05:52,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 11:05:52,558 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 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 12 [2022-11-16 11:05:52,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:05:52,578 INFO L225 Difference]: With dead ends: 6690 [2022-11-16 11:05:52,578 INFO L226 Difference]: Without dead ends: 6690 [2022-11-16 11:05:52,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 11:05:52,579 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2111 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4886 mSolverCounterSat, 325 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2111 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 4886 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 58.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:05:52,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2111 Valid, 0 Invalid, 5231 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [325 Valid, 4886 Invalid, 20 Unknown, 0 Unchecked, 58.3s Time] [2022-11-16 11:05:52,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6690 states. [2022-11-16 11:05:52,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6690 to 650. [2022-11-16 11:05:52,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 599 states have (on average 2.8931552587646077) internal successors, (1733), 649 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:52,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1733 transitions. [2022-11-16 11:05:52,653 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1733 transitions. Word has length 12 [2022-11-16 11:05:52,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:05:52,654 INFO L495 AbstractCegarLoop]: Abstraction has 650 states and 1733 transitions. [2022-11-16 11:05:52,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:52,654 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1733 transitions. [2022-11-16 11:05:52,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:05:52,655 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:05:52,656 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:05:52,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-16 11:05:52,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:05:52,871 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:05:52,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:05:52,872 INFO L85 PathProgramCache]: Analyzing trace with hash 693725946, now seen corresponding path program 1 times [2022-11-16 11:05:52,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:05:52,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2108407132] [2022-11-16 11:05:52,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:52,872 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:05:52,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:05:52,873 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:05:52,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-16 11:05:53,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:53,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:05:53,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:05:53,437 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:05:53,437 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:05:53,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:05:53,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:05:53,602 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:05:53,602 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:05:53,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:05:53,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:05:53,895 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:05:53,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2108407132] [2022-11-16 11:05:53,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2108407132] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:05:53,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:05:53,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:05:53,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568513715] [2022-11-16 11:05:53,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:05:53,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:05:53,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:05:53,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:05:53,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:05:53,897 INFO L87 Difference]: Start difference. First operand 650 states and 1733 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 11:05:54,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:05:54,327 INFO L93 Difference]: Finished difference Result 657 states and 1745 transitions. [2022-11-16 11:05:54,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:05:54,328 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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 12 [2022-11-16 11:05:54,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:05:54,330 INFO L225 Difference]: With dead ends: 657 [2022-11-16 11:05:54,330 INFO L226 Difference]: Without dead ends: 657 [2022-11-16 11:05:54,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:05:54,331 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:05:54,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 47 Unchecked, 0.4s Time] [2022-11-16 11:05:54,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-11-16 11:05:54,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 653. [2022-11-16 11:05:54,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 602 states have (on average 2.888704318936877) internal successors, (1739), 652 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:54,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1739 transitions. [2022-11-16 11:05:54,344 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1739 transitions. Word has length 12 [2022-11-16 11:05:54,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:05:54,344 INFO L495 AbstractCegarLoop]: Abstraction has 653 states and 1739 transitions. [2022-11-16 11:05:54,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 11:05:54,345 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1739 transitions. [2022-11-16 11:05:54,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:05:54,345 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:05:54,345 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:05:54,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Ended with exit code 0 [2022-11-16 11:05:54,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:05:54,546 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:05:54,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:05:54,546 INFO L85 PathProgramCache]: Analyzing trace with hash 698271786, now seen corresponding path program 2 times [2022-11-16 11:05:54,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:05:54,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1323875057] [2022-11-16 11:05:54,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:05:54,547 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:05:54,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:05:54,548 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:05:54,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-16 11:05:54,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:05:54,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:05:54,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:05:54,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:05:55,017 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:05:55,018 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:05:55,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:05:55,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:05:55,181 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:05:55,181 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:05:55,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:05:55,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:05:55,475 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:05:55,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1323875057] [2022-11-16 11:05:55,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1323875057] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:05:55,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:05:55,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:05:55,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321690449] [2022-11-16 11:05:55,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:05:55,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:05:55,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:05:55,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:05:55,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:05:55,476 INFO L87 Difference]: Start difference. First operand 653 states and 1739 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 11:05:55,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:05:55,859 INFO L93 Difference]: Finished difference Result 662 states and 1760 transitions. [2022-11-16 11:05:55,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:05:55,860 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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 12 [2022-11-16 11:05:55,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:05:55,861 INFO L225 Difference]: With dead ends: 662 [2022-11-16 11:05:55,862 INFO L226 Difference]: Without dead ends: 662 [2022-11-16 11:05:55,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:05:55,862 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:05:55,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 71 Unchecked, 0.4s Time] [2022-11-16 11:05:55,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-11-16 11:05:55,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 657. [2022-11-16 11:05:55,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 606 states have (on average 2.8894389438943895) internal successors, (1751), 656 states have internal predecessors, (1751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:55,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1751 transitions. [2022-11-16 11:05:55,875 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1751 transitions. Word has length 12 [2022-11-16 11:05:55,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:05:55,875 INFO L495 AbstractCegarLoop]: Abstraction has 657 states and 1751 transitions. [2022-11-16 11:05:55,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 11:05:55,876 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1751 transitions. [2022-11-16 11:05:55,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:05:55,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:05:55,876 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:05:55,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-11-16 11:05:56,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:05:56,077 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:05:56,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:05:56,077 INFO L85 PathProgramCache]: Analyzing trace with hash 698277273, now seen corresponding path program 1 times [2022-11-16 11:05:56,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:05:56,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [506068005] [2022-11-16 11:05:56,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:56,078 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:05:56,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:05:56,079 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:05:56,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-16 11:05:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:56,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:05:56,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:05:56,598 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:05:56,598 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:05:56,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:05:56,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:05:56,769 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:05:56,770 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:05:57,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:05:57,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:05:57,058 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:05:57,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [506068005] [2022-11-16 11:05:57,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [506068005] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:05:57,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:05:57,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:05:57,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314177234] [2022-11-16 11:05:57,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:05:57,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:05:57,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:05:57,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:05:57,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:05:57,059 INFO L87 Difference]: Start difference. First operand 657 states and 1751 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 11:05:57,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:05:57,458 INFO L93 Difference]: Finished difference Result 665 states and 1763 transitions. [2022-11-16 11:05:57,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:05:57,459 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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 12 [2022-11-16 11:05:57,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:05:57,460 INFO L225 Difference]: With dead ends: 665 [2022-11-16 11:05:57,460 INFO L226 Difference]: Without dead ends: 665 [2022-11-16 11:05:57,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:05:57,461 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:05:57,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 45 Unchecked, 0.4s Time] [2022-11-16 11:05:57,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-11-16 11:05:57,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 655. [2022-11-16 11:05:57,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 604 states have (on average 2.8874172185430464) internal successors, (1744), 654 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:57,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1744 transitions. [2022-11-16 11:05:57,477 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1744 transitions. Word has length 12 [2022-11-16 11:05:57,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:05:57,478 INFO L495 AbstractCegarLoop]: Abstraction has 655 states and 1744 transitions. [2022-11-16 11:05:57,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 11:05:57,478 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1744 transitions. [2022-11-16 11:05:57,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:05:57,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:05:57,479 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:05:57,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-16 11:05:57,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:05:57,690 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:05:57,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:05:57,691 INFO L85 PathProgramCache]: Analyzing trace with hash 698338746, now seen corresponding path program 3 times [2022-11-16 11:05:57,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:05:57,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1281259088] [2022-11-16 11:05:57,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:05:57,692 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:05:57,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:05:57,693 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:05:57,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-16 11:05:57,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 11:05:57,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:05:57,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:05:57,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:05:58,131 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:05:58,132 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:05:58,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:05:58,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:05:58,290 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:05:58,290 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:05:58,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:05:58,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:05:58,565 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:05:58,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1281259088] [2022-11-16 11:05:58,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1281259088] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:05:58,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:05:58,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:05:58,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695951831] [2022-11-16 11:05:58,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:05:58,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:05:58,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:05:58,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:05:58,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:05:58,567 INFO L87 Difference]: Start difference. First operand 655 states and 1744 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 11:05:58,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:05:58,965 INFO L93 Difference]: Finished difference Result 657 states and 1747 transitions. [2022-11-16 11:05:58,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:05:58,965 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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 12 [2022-11-16 11:05:58,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:05:58,967 INFO L225 Difference]: With dead ends: 657 [2022-11-16 11:05:58,967 INFO L226 Difference]: Without dead ends: 657 [2022-11-16 11:05:58,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:05:58,968 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:05:58,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 43 Unchecked, 0.4s Time] [2022-11-16 11:05:58,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-11-16 11:05:58,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 655. [2022-11-16 11:05:58,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 604 states have (on average 2.8874172185430464) internal successors, (1744), 654 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:58,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1744 transitions. [2022-11-16 11:05:58,978 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1744 transitions. Word has length 12 [2022-11-16 11:05:58,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:05:58,979 INFO L495 AbstractCegarLoop]: Abstraction has 655 states and 1744 transitions. [2022-11-16 11:05:58,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 11:05:58,979 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1744 transitions. [2022-11-16 11:05:58,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:05:58,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:05:58,980 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:05:58,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-16 11:05:59,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:05:59,184 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:05:59,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:05:59,184 INFO L85 PathProgramCache]: Analyzing trace with hash 698508843, now seen corresponding path program 2 times [2022-11-16 11:05:59,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:05:59,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [401838220] [2022-11-16 11:05:59,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:05:59,185 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:05:59,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:05:59,186 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:05:59,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-16 11:05:59,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:05:59,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:05:59,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:05:59,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:05:59,628 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:05:59,628 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:05:59,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:05:59,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:05:59,803 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:05:59,804 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:06:00,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:06:00,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:06:00,083 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:06:00,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [401838220] [2022-11-16 11:06:00,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [401838220] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:06:00,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:06:00,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:06:00,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637667953] [2022-11-16 11:06:00,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:00,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:06:00,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:06:00,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:06:00,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:00,085 INFO L87 Difference]: Start difference. First operand 655 states and 1744 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 11:06:00,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:00,476 INFO L93 Difference]: Finished difference Result 661 states and 1752 transitions. [2022-11-16 11:06:00,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:06:00,477 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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 12 [2022-11-16 11:06:00,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:00,479 INFO L225 Difference]: With dead ends: 661 [2022-11-16 11:06:00,479 INFO L226 Difference]: Without dead ends: 661 [2022-11-16 11:06:00,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:00,480 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:00,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 43 Unchecked, 0.4s Time] [2022-11-16 11:06:00,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-11-16 11:06:00,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 655. [2022-11-16 11:06:00,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 604 states have (on average 2.8874172185430464) internal successors, (1744), 654 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:00,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1744 transitions. [2022-11-16 11:06:00,492 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1744 transitions. Word has length 12 [2022-11-16 11:06:00,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:00,493 INFO L495 AbstractCegarLoop]: Abstraction has 655 states and 1744 transitions. [2022-11-16 11:06:00,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 11:06:00,493 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1744 transitions. [2022-11-16 11:06:00,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:06:00,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:00,494 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:00,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Ended with exit code 0 [2022-11-16 11:06:00,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:00,694 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:06:00,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:00,695 INFO L85 PathProgramCache]: Analyzing trace with hash 698998953, now seen corresponding path program 3 times [2022-11-16 11:06:00,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:06:00,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [627722677] [2022-11-16 11:06:00,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:06:00,695 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:00,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:06:00,696 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:06:00,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-16 11:06:01,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 11:06:01,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:01,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:06:01,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:01,216 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:06:01,216 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:06:01,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:01,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:06:01,393 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:06:01,394 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:06:01,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:06:01,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:06:01,669 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:06:01,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [627722677] [2022-11-16 11:06:01,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [627722677] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:06:01,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:06:01,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:06:01,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045481074] [2022-11-16 11:06:01,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:01,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:06:01,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:06:01,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:06:01,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:01,671 INFO L87 Difference]: Start difference. First operand 655 states and 1744 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 11:06:02,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:02,100 INFO L93 Difference]: Finished difference Result 660 states and 1751 transitions. [2022-11-16 11:06:02,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:06:02,101 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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 12 [2022-11-16 11:06:02,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:02,103 INFO L225 Difference]: With dead ends: 660 [2022-11-16 11:06:02,103 INFO L226 Difference]: Without dead ends: 660 [2022-11-16 11:06:02,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:02,103 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:02,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 75 Unchecked, 0.4s Time] [2022-11-16 11:06:02,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2022-11-16 11:06:02,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 655. [2022-11-16 11:06:02,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 604 states have (on average 2.8874172185430464) internal successors, (1744), 654 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:02,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1744 transitions. [2022-11-16 11:06:02,115 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1744 transitions. Word has length 12 [2022-11-16 11:06:02,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:02,115 INFO L495 AbstractCegarLoop]: Abstraction has 655 states and 1744 transitions. [2022-11-16 11:06:02,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 11:06:02,115 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1744 transitions. [2022-11-16 11:06:02,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:06:02,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:02,116 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:02,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:02,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:02,316 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:06:02,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:02,317 INFO L85 PathProgramCache]: Analyzing trace with hash 288114860, now seen corresponding path program 1 times [2022-11-16 11:06:02,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:06:02,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [72724279] [2022-11-16 11:06:02,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:02,317 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:02,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:06:02,319 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:06:02,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-16 11:06:02,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:02,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:06:02,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:02,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:02,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:06:02,759 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:06:02,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [72724279] [2022-11-16 11:06:02,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [72724279] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:06:02,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:06:02,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:06:02,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319477416] [2022-11-16 11:06:02,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:02,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:06:02,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:06:02,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:06:02,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:06:02,761 INFO L87 Difference]: Start difference. First operand 655 states and 1744 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) [2022-11-16 11:06:03,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:03,500 INFO L93 Difference]: Finished difference Result 721 states and 1881 transitions. [2022-11-16 11:06:03,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:06:03,501 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 12 [2022-11-16 11:06:03,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:03,502 INFO L225 Difference]: With dead ends: 721 [2022-11-16 11:06:03,502 INFO L226 Difference]: Without dead ends: 655 [2022-11-16 11:06:03,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:06:03,503 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:03,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 0 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:06:03,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-11-16 11:06:03,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 654. [2022-11-16 11:06:03,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 601 states have (on average 2.875207986688852) internal successors, (1728), 653 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:03,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1728 transitions. [2022-11-16 11:06:03,513 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1728 transitions. Word has length 12 [2022-11-16 11:06:03,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:03,513 INFO L495 AbstractCegarLoop]: Abstraction has 654 states and 1728 transitions. [2022-11-16 11:06:03,513 INFO L496 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) [2022-11-16 11:06:03,513 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1728 transitions. [2022-11-16 11:06:03,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:06:03,514 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:03,514 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:03,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Ended with exit code 0 [2022-11-16 11:06:03,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:03,715 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:06:03,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:03,715 INFO L85 PathProgramCache]: Analyzing trace with hash 288114962, now seen corresponding path program 1 times [2022-11-16 11:06:03,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:06:03,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1352639963] [2022-11-16 11:06:03,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:03,716 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:03,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:06:03,717 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:06:03,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-16 11:06:04,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:04,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:06:04,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:04,263 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:06:04,263 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:06:04,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:04,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:06:04,422 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:06:04,423 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:06:04,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:04,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:06:04,679 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:06:04,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1352639963] [2022-11-16 11:06:04,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1352639963] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:06:04,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:06:04,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:06:04,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742768531] [2022-11-16 11:06:04,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:04,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:06:04,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:06:04,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:06:04,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:04,681 INFO L87 Difference]: Start difference. First operand 654 states and 1728 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 11:06:05,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:05,085 INFO L93 Difference]: Finished difference Result 658 states and 1732 transitions. [2022-11-16 11:06:05,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:06:05,086 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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 12 [2022-11-16 11:06:05,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:05,088 INFO L225 Difference]: With dead ends: 658 [2022-11-16 11:06:05,088 INFO L226 Difference]: Without dead ends: 658 [2022-11-16 11:06:05,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:05,089 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:05,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 43 Unchecked, 0.4s Time] [2022-11-16 11:06:05,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-11-16 11:06:05,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 658. [2022-11-16 11:06:05,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 605 states have (on average 2.862809917355372) internal successors, (1732), 657 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:05,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1732 transitions. [2022-11-16 11:06:05,099 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1732 transitions. Word has length 12 [2022-11-16 11:06:05,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:05,099 INFO L495 AbstractCegarLoop]: Abstraction has 658 states and 1732 transitions. [2022-11-16 11:06:05,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 11:06:05,099 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1732 transitions. [2022-11-16 11:06:05,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:06:05,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:05,100 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:05,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Ended with exit code 0 [2022-11-16 11:06:05,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:05,301 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:06:05,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:05,301 INFO L85 PathProgramCache]: Analyzing trace with hash 429056462, now seen corresponding path program 2 times [2022-11-16 11:06:05,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:06:05,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1032181041] [2022-11-16 11:06:05,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:06:05,302 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:05,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:06:05,304 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:06:05,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-16 11:06:05,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:06:05,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:05,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:06:05,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:05,762 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:06:05,762 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:06:05,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:05,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:06:05,922 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:06:05,922 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:06:06,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:06,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:06:06,211 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:06:06,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1032181041] [2022-11-16 11:06:06,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1032181041] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:06:06,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:06:06,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:06:06,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179338966] [2022-11-16 11:06:06,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:06,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:06:06,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:06:06,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:06:06,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:06,213 INFO L87 Difference]: Start difference. First operand 658 states and 1732 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 11:06:06,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:06,595 INFO L93 Difference]: Finished difference Result 666 states and 1745 transitions. [2022-11-16 11:06:06,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:06:06,595 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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 12 [2022-11-16 11:06:06,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:06,597 INFO L225 Difference]: With dead ends: 666 [2022-11-16 11:06:06,597 INFO L226 Difference]: Without dead ends: 666 [2022-11-16 11:06:06,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:06,598 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:06,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 72 Unchecked, 0.4s Time] [2022-11-16 11:06:06,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-11-16 11:06:06,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 662. [2022-11-16 11:06:06,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 609 states have (on average 2.857142857142857) internal successors, (1740), 661 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:06,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1740 transitions. [2022-11-16 11:06:06,613 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1740 transitions. Word has length 12 [2022-11-16 11:06:06,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:06,613 INFO L495 AbstractCegarLoop]: Abstraction has 662 states and 1740 transitions. [2022-11-16 11:06:06,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 11:06:06,613 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1740 transitions. [2022-11-16 11:06:06,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:06:06,614 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:06,614 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:06,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:06,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:06,830 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:06:06,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:06,830 INFO L85 PathProgramCache]: Analyzing trace with hash 429061949, now seen corresponding path program 1 times [2022-11-16 11:06:06,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:06:06,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2084581418] [2022-11-16 11:06:06,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:06,831 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:06,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:06:06,832 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:06:06,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-16 11:06:07,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:07,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:06:07,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:07,418 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:06:07,418 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:06:07,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:07,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:06:07,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:07,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:06:07,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:07,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:06:07,860 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:06:07,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2084581418] [2022-11-16 11:06:07,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2084581418] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:06:07,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:06:07,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:06:07,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136718506] [2022-11-16 11:06:07,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:07,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:06:07,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:06:07,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:06:07,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:07,865 INFO L87 Difference]: Start difference. First operand 662 states and 1740 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 11:06:08,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:08,454 INFO L93 Difference]: Finished difference Result 676 states and 1765 transitions. [2022-11-16 11:06:08,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:06:08,455 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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 12 [2022-11-16 11:06:08,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:08,457 INFO L225 Difference]: With dead ends: 676 [2022-11-16 11:06:08,457 INFO L226 Difference]: Without dead ends: 676 [2022-11-16 11:06:08,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:06:08,458 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 5 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:08,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 0 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 47 Unchecked, 0.5s Time] [2022-11-16 11:06:08,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-11-16 11:06:08,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 665. [2022-11-16 11:06:08,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 612 states have (on average 2.854575163398693) internal successors, (1747), 664 states have internal predecessors, (1747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:08,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1747 transitions. [2022-11-16 11:06:08,469 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1747 transitions. Word has length 12 [2022-11-16 11:06:08,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:08,470 INFO L495 AbstractCegarLoop]: Abstraction has 665 states and 1747 transitions. [2022-11-16 11:06:08,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 11:06:08,470 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1747 transitions. [2022-11-16 11:06:08,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:06:08,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:08,471 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:08,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Ended with exit code 0 [2022-11-16 11:06:08,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:08,682 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:06:08,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:08,682 INFO L85 PathProgramCache]: Analyzing trace with hash 429036002, now seen corresponding path program 3 times [2022-11-16 11:06:08,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:06:08,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [353937281] [2022-11-16 11:06:08,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:06:08,683 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:08,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:06:08,684 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:06:08,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-16 11:06:08,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 11:06:08,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:08,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:06:08,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:09,169 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:06:09,169 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:06:09,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:09,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:06:09,359 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:06:09,360 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:06:09,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:09,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:06:09,705 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:06:09,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [353937281] [2022-11-16 11:06:09,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [353937281] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:06:09,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:06:09,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:06:09,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244028530] [2022-11-16 11:06:09,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:09,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:06:09,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:06:09,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:06:09,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:09,708 INFO L87 Difference]: Start difference. First operand 665 states and 1747 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 11:06:10,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:10,117 INFO L93 Difference]: Finished difference Result 667 states and 1749 transitions. [2022-11-16 11:06:10,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:06:10,118 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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 12 [2022-11-16 11:06:10,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:10,119 INFO L225 Difference]: With dead ends: 667 [2022-11-16 11:06:10,120 INFO L226 Difference]: Without dead ends: 667 [2022-11-16 11:06:10,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:10,120 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:10,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 43 Unchecked, 0.4s Time] [2022-11-16 11:06:10,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-11-16 11:06:10,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 665. [2022-11-16 11:06:10,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 612 states have (on average 2.854575163398693) internal successors, (1747), 664 states have internal predecessors, (1747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:10,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1747 transitions. [2022-11-16 11:06:10,133 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1747 transitions. Word has length 12 [2022-11-16 11:06:10,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:10,133 INFO L495 AbstractCegarLoop]: Abstraction has 665 states and 1747 transitions. [2022-11-16 11:06:10,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 11:06:10,134 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1747 transitions. [2022-11-16 11:06:10,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:06:10,134 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:10,134 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:10,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:10,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:10,350 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:06:10,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:10,350 INFO L85 PathProgramCache]: Analyzing trace with hash 429206099, now seen corresponding path program 2 times [2022-11-16 11:06:10,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:06:10,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [655878337] [2022-11-16 11:06:10,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:06:10,351 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:10,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:06:10,352 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:06:10,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-16 11:06:10,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:06:10,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:10,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:06:10,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:10,812 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:06:10,812 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:06:10,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:10,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:06:10,983 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:06:10,984 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:06:11,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:11,280 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:06:11,280 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:06:11,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [655878337] [2022-11-16 11:06:11,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [655878337] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:06:11,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:06:11,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:06:11,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163345923] [2022-11-16 11:06:11,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:11,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:06:11,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:06:11,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:06:11,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:11,282 INFO L87 Difference]: Start difference. First operand 665 states and 1747 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 11:06:11,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:11,668 INFO L93 Difference]: Finished difference Result 671 states and 1753 transitions. [2022-11-16 11:06:11,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:06:11,669 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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 12 [2022-11-16 11:06:11,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:11,671 INFO L225 Difference]: With dead ends: 671 [2022-11-16 11:06:11,671 INFO L226 Difference]: Without dead ends: 671 [2022-11-16 11:06:11,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:11,671 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:11,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 42 Unchecked, 0.4s Time] [2022-11-16 11:06:11,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2022-11-16 11:06:11,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 666. [2022-11-16 11:06:11,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 613 states have (on average 2.8515497553017943) internal successors, (1748), 665 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:11,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1748 transitions. [2022-11-16 11:06:11,683 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1748 transitions. Word has length 12 [2022-11-16 11:06:11,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:11,683 INFO L495 AbstractCegarLoop]: Abstraction has 666 states and 1748 transitions. [2022-11-16 11:06:11,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 11:06:11,684 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1748 transitions. [2022-11-16 11:06:11,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:06:11,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:11,684 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:11,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:11,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:11,890 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:06:11,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:11,891 INFO L85 PathProgramCache]: Analyzing trace with hash 436384769, now seen corresponding path program 3 times [2022-11-16 11:06:11,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:06:11,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [390305864] [2022-11-16 11:06:11,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:06:11,891 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:11,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:06:11,892 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:06:11,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-16 11:06:12,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 11:06:12,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:12,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:06:12,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:12,350 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:06:12,350 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:06:12,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:12,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:06:12,537 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:06:12,538 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:06:12,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:12,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:06:12,835 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:06:12,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [390305864] [2022-11-16 11:06:12,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [390305864] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:06:12,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:06:12,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:06:12,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698974636] [2022-11-16 11:06:12,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:12,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:06:12,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:06:12,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:06:12,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:12,836 INFO L87 Difference]: Start difference. First operand 666 states and 1748 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 11:06:13,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:13,226 INFO L93 Difference]: Finished difference Result 671 states and 1753 transitions. [2022-11-16 11:06:13,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:06:13,227 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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 12 [2022-11-16 11:06:13,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:13,228 INFO L225 Difference]: With dead ends: 671 [2022-11-16 11:06:13,228 INFO L226 Difference]: Without dead ends: 671 [2022-11-16 11:06:13,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:13,229 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:13,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 104 Unchecked, 0.4s Time] [2022-11-16 11:06:13,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2022-11-16 11:06:13,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 667. [2022-11-16 11:06:13,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 614 states have (on average 2.8485342019543975) internal successors, (1749), 666 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:13,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1749 transitions. [2022-11-16 11:06:13,240 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1749 transitions. Word has length 12 [2022-11-16 11:06:13,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:13,240 INFO L495 AbstractCegarLoop]: Abstraction has 667 states and 1749 transitions. [2022-11-16 11:06:13,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 11:06:13,240 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1749 transitions. [2022-11-16 11:06:13,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:06:13,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:13,241 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:13,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:13,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:13,442 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:06:13,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:13,445 INFO L85 PathProgramCache]: Analyzing trace with hash 451578179, now seen corresponding path program 4 times [2022-11-16 11:06:13,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:06:13,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1807066899] [2022-11-16 11:06:13,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:06:13,446 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:13,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:06:13,447 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:06:13,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-16 11:06:13,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:06:13,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:13,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:06:13,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:13,990 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:06:13,990 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:06:14,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:14,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:06:14,152 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:06:14,152 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:06:14,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:14,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:06:14,452 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:06:14,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1807066899] [2022-11-16 11:06:14,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1807066899] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:06:14,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:06:14,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:06:14,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668495364] [2022-11-16 11:06:14,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:14,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:06:14,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:06:14,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:06:14,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:14,454 INFO L87 Difference]: Start difference. First operand 667 states and 1749 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 11:06:14,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:14,932 INFO L93 Difference]: Finished difference Result 672 states and 1753 transitions. [2022-11-16 11:06:14,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:06:14,932 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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 12 [2022-11-16 11:06:14,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:14,934 INFO L225 Difference]: With dead ends: 672 [2022-11-16 11:06:14,934 INFO L226 Difference]: Without dead ends: 667 [2022-11-16 11:06:14,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:14,935 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 7 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:14,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 0 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 48 Unchecked, 0.5s Time] [2022-11-16 11:06:14,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-11-16 11:06:14,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 667. [2022-11-16 11:06:14,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 614 states have (on average 2.8469055374592833) internal successors, (1748), 666 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:14,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1748 transitions. [2022-11-16 11:06:14,945 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1748 transitions. Word has length 12 [2022-11-16 11:06:14,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:14,945 INFO L495 AbstractCegarLoop]: Abstraction has 667 states and 1748 transitions. [2022-11-16 11:06:14,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 11:06:14,946 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1748 transitions. [2022-11-16 11:06:14,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:06:14,946 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:14,946 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:14,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Ended with exit code 0 [2022-11-16 11:06:15,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:15,147 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:06:15,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:15,147 INFO L85 PathProgramCache]: Analyzing trace with hash -943079808, now seen corresponding path program 1 times [2022-11-16 11:06:15,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:06:15,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1543289405] [2022-11-16 11:06:15,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:15,148 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:15,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:06:15,149 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:06:15,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-16 11:06:15,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:15,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:06:15,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:15,699 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:06:15,700 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:06:15,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:15,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:06:15,892 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:06:15,892 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:06:16,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:06:16,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:06:16,172 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:06:16,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1543289405] [2022-11-16 11:06:16,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1543289405] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:06:16,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:06:16,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:06:16,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695366048] [2022-11-16 11:06:16,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:16,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:06:16,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:06:16,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:06:16,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:16,173 INFO L87 Difference]: Start difference. First operand 667 states and 1748 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 11:06:16,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:16,580 INFO L93 Difference]: Finished difference Result 671 states and 1753 transitions. [2022-11-16 11:06:16,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:06:16,581 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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 12 [2022-11-16 11:06:16,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:16,583 INFO L225 Difference]: With dead ends: 671 [2022-11-16 11:06:16,583 INFO L226 Difference]: Without dead ends: 671 [2022-11-16 11:06:16,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:16,583 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:16,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 49 Unchecked, 0.4s Time] [2022-11-16 11:06:16,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2022-11-16 11:06:16,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 670. [2022-11-16 11:06:16,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 617 states have (on average 2.8395461912479742) internal successors, (1752), 669 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:16,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1752 transitions. [2022-11-16 11:06:16,595 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1752 transitions. Word has length 12 [2022-11-16 11:06:16,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:16,595 INFO L495 AbstractCegarLoop]: Abstraction has 670 states and 1752 transitions. [2022-11-16 11:06:16,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 11:06:16,595 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1752 transitions. [2022-11-16 11:06:16,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:06:16,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:16,596 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:16,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Ended with exit code 0 [2022-11-16 11:06:16,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:16,797 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:06:16,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:16,797 INFO L85 PathProgramCache]: Analyzing trace with hash -938533968, now seen corresponding path program 2 times [2022-11-16 11:06:16,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:06:16,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1603061137] [2022-11-16 11:06:16,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:06:16,798 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:16,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:06:16,799 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:06:16,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-16 11:06:17,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:06:17,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:17,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:06:17,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:17,266 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:06:17,266 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:06:17,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:17,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:06:17,442 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:06:17,443 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:06:17,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:06:17,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:06:17,726 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:06:17,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1603061137] [2022-11-16 11:06:17,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1603061137] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:06:17,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:06:17,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:06:17,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672210155] [2022-11-16 11:06:17,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:17,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:06:17,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:06:17,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:06:17,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:17,728 INFO L87 Difference]: Start difference. First operand 670 states and 1752 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 11:06:18,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:18,136 INFO L93 Difference]: Finished difference Result 677 states and 1764 transitions. [2022-11-16 11:06:18,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:06:18,137 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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 12 [2022-11-16 11:06:18,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:18,138 INFO L225 Difference]: With dead ends: 677 [2022-11-16 11:06:18,139 INFO L226 Difference]: Without dead ends: 677 [2022-11-16 11:06:18,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:18,139 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:18,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 45 Unchecked, 0.4s Time] [2022-11-16 11:06:18,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-11-16 11:06:18,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 670. [2022-11-16 11:06:18,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 617 states have (on average 2.8395461912479742) internal successors, (1752), 669 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:18,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1752 transitions. [2022-11-16 11:06:18,151 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1752 transitions. Word has length 12 [2022-11-16 11:06:18,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:18,151 INFO L495 AbstractCegarLoop]: Abstraction has 670 states and 1752 transitions. [2022-11-16 11:06:18,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 11:06:18,151 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1752 transitions. [2022-11-16 11:06:18,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:06:18,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:18,152 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:18,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Ended with exit code 0 [2022-11-16 11:06:18,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:18,352 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:06:18,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:18,353 INFO L85 PathProgramCache]: Analyzing trace with hash -938467008, now seen corresponding path program 3 times [2022-11-16 11:06:18,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:06:18,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1470632144] [2022-11-16 11:06:18,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:06:18,353 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:18,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:06:18,355 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:06:18,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-16 11:06:18,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 11:06:18,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:18,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:06:18,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:18,854 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:06:18,854 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:06:18,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:18,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:06:19,039 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:06:19,039 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:06:19,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:06:19,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:06:19,284 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:06:19,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1470632144] [2022-11-16 11:06:19,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1470632144] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:06:19,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:06:19,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:06:19,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433773885] [2022-11-16 11:06:19,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:19,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:06:19,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:06:19,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:06:19,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:19,285 INFO L87 Difference]: Start difference. First operand 670 states and 1752 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 11:06:19,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:19,720 INFO L93 Difference]: Finished difference Result 672 states and 1755 transitions. [2022-11-16 11:06:19,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:06:19,721 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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 12 [2022-11-16 11:06:19,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:19,722 INFO L225 Difference]: With dead ends: 672 [2022-11-16 11:06:19,722 INFO L226 Difference]: Without dead ends: 672 [2022-11-16 11:06:19,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:19,723 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:19,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 44 Unchecked, 0.4s Time] [2022-11-16 11:06:19,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-11-16 11:06:19,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 670. [2022-11-16 11:06:19,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 617 states have (on average 2.8395461912479742) internal successors, (1752), 669 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:19,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1752 transitions. [2022-11-16 11:06:19,734 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1752 transitions. Word has length 12 [2022-11-16 11:06:19,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:19,734 INFO L495 AbstractCegarLoop]: Abstraction has 670 states and 1752 transitions. [2022-11-16 11:06:19,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 11:06:19,734 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1752 transitions. [2022-11-16 11:06:19,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:06:19,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:19,735 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:19,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:19,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:19,946 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:06:19,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:19,947 INFO L85 PathProgramCache]: Analyzing trace with hash -938296911, now seen corresponding path program 1 times [2022-11-16 11:06:19,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:06:19,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1305066758] [2022-11-16 11:06:19,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:19,947 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:19,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:06:19,949 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:06:19,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-16 11:06:20,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:20,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:06:20,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:20,519 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:06:20,519 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:06:20,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:20,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:06:20,692 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:06:20,693 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:06:20,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:06:20,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:06:20,941 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:06:20,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1305066758] [2022-11-16 11:06:20,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1305066758] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:06:20,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:06:20,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:06:20,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952761889] [2022-11-16 11:06:20,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:20,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:06:20,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:06:20,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:06:20,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:20,944 INFO L87 Difference]: Start difference. First operand 670 states and 1752 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 11:06:21,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:21,346 INFO L93 Difference]: Finished difference Result 675 states and 1758 transitions. [2022-11-16 11:06:21,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:06:21,347 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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 12 [2022-11-16 11:06:21,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:21,349 INFO L225 Difference]: With dead ends: 675 [2022-11-16 11:06:21,349 INFO L226 Difference]: Without dead ends: 675 [2022-11-16 11:06:21,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:21,349 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:21,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 44 Unchecked, 0.4s Time] [2022-11-16 11:06:21,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-11-16 11:06:21,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 671. [2022-11-16 11:06:21,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 618 states have (on average 2.836569579288026) internal successors, (1753), 670 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:21,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1753 transitions. [2022-11-16 11:06:21,362 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1753 transitions. Word has length 12 [2022-11-16 11:06:21,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:21,362 INFO L495 AbstractCegarLoop]: Abstraction has 671 states and 1753 transitions. [2022-11-16 11:06:21,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 11:06:21,363 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1753 transitions. [2022-11-16 11:06:21,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:06:21,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:21,364 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:21,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Ended with exit code 0 [2022-11-16 11:06:21,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:21,578 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:06:21,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:21,579 INFO L85 PathProgramCache]: Analyzing trace with hash -937806801, now seen corresponding path program 2 times [2022-11-16 11:06:21,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:06:21,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1559928951] [2022-11-16 11:06:21,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:06:21,579 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:21,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:06:21,580 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:06:21,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-16 11:06:21,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:06:21,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:21,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:06:21,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:22,067 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:06:22,067 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:06:22,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:22,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:06:22,271 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:06:22,271 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:06:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:06:22,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:06:22,514 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:06:22,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1559928951] [2022-11-16 11:06:22,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1559928951] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:06:22,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:06:22,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:06:22,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423151566] [2022-11-16 11:06:22,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:22,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:06:22,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:06:22,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:06:22,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:22,516 INFO L87 Difference]: Start difference. First operand 671 states and 1753 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 11:06:22,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:22,930 INFO L93 Difference]: Finished difference Result 674 states and 1757 transitions. [2022-11-16 11:06:22,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:06:22,931 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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 12 [2022-11-16 11:06:22,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:22,932 INFO L225 Difference]: With dead ends: 674 [2022-11-16 11:06:22,932 INFO L226 Difference]: Without dead ends: 674 [2022-11-16 11:06:22,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:22,933 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:22,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 76 Unchecked, 0.4s Time] [2022-11-16 11:06:22,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-11-16 11:06:22,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 672. [2022-11-16 11:06:22,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 619 states have (on average 2.8336025848142166) internal successors, (1754), 671 states have internal predecessors, (1754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:22,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 1754 transitions. [2022-11-16 11:06:22,945 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 1754 transitions. Word has length 12 [2022-11-16 11:06:22,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:22,945 INFO L495 AbstractCegarLoop]: Abstraction has 672 states and 1754 transitions. [2022-11-16 11:06:22,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 11:06:22,945 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 1754 transitions. [2022-11-16 11:06:22,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:06:22,946 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:22,946 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:22,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:23,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:23,147 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:06:23,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:23,147 INFO L85 PathProgramCache]: Analyzing trace with hash -502350878, now seen corresponding path program 1 times [2022-11-16 11:06:23,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:06:23,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1106375896] [2022-11-16 11:06:23,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:23,148 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:23,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:06:23,149 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:06:23,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-16 11:06:23,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:23,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:06:23,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:23,653 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 11:06:23,653 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-16 11:06:23,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:23,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:06:23,794 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:06:23,795 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-11-16 11:06:23,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:06:23,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:06:23,922 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:06:23,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1106375896] [2022-11-16 11:06:23,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1106375896] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:06:23,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:06:23,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:06:23,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459181095] [2022-11-16 11:06:23,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:23,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:06:23,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:06:23,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:06:23,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:06:23,924 INFO L87 Difference]: Start difference. First operand 672 states and 1754 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 11:06:24,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:24,314 INFO L93 Difference]: Finished difference Result 670 states and 1750 transitions. [2022-11-16 11:06:24,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:06:24,315 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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 12 [2022-11-16 11:06:24,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:24,317 INFO L225 Difference]: With dead ends: 670 [2022-11-16 11:06:24,317 INFO L226 Difference]: Without dead ends: 661 [2022-11-16 11:06:24,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:06:24,318 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:24,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 40 Unchecked, 0.4s Time] [2022-11-16 11:06:24,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-11-16 11:06:24,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 644. [2022-11-16 11:06:24,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 592 states have (on average 2.8800675675675675) internal successors, (1705), 643 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:24,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1705 transitions. [2022-11-16 11:06:24,329 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1705 transitions. Word has length 12 [2022-11-16 11:06:24,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:24,329 INFO L495 AbstractCegarLoop]: Abstraction has 644 states and 1705 transitions. [2022-11-16 11:06:24,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 11:06:24,329 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1705 transitions. [2022-11-16 11:06:24,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:06:24,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:24,330 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:24,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:24,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:24,534 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:06:24,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:24,535 INFO L85 PathProgramCache]: Analyzing trace with hash 30663762, now seen corresponding path program 1 times [2022-11-16 11:06:24,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:06:24,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [837401232] [2022-11-16 11:06:24,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:24,535 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:24,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:06:24,536 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:06:24,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-16 11:06:24,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:24,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:06:24,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:25,125 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:06:25,125 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:06:25,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:25,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:06:25,288 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:06:25,289 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:06:25,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:06:25,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:06:25,656 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:06:25,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [837401232] [2022-11-16 11:06:25,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [837401232] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:06:25,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:06:25,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:06:25,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563754430] [2022-11-16 11:06:25,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:25,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:06:25,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:06:25,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:06:25,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:25,658 INFO L87 Difference]: Start difference. First operand 644 states and 1705 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:06:26,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:26,058 INFO L93 Difference]: Finished difference Result 666 states and 1728 transitions. [2022-11-16 11:06:26,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:06:26,059 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 13 [2022-11-16 11:06:26,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:26,060 INFO L225 Difference]: With dead ends: 666 [2022-11-16 11:06:26,060 INFO L226 Difference]: Without dead ends: 666 [2022-11-16 11:06:26,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:26,061 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:26,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 104 Unchecked, 0.4s Time] [2022-11-16 11:06:26,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-11-16 11:06:26,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 643. [2022-11-16 11:06:26,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 591 states have (on average 2.883248730964467) internal successors, (1704), 642 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:26,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1704 transitions. [2022-11-16 11:06:26,076 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1704 transitions. Word has length 13 [2022-11-16 11:06:26,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:26,076 INFO L495 AbstractCegarLoop]: Abstraction has 643 states and 1704 transitions. [2022-11-16 11:06:26,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:06:26,077 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1704 transitions. [2022-11-16 11:06:26,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:06:26,077 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:26,077 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:26,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Ended with exit code 0 [2022-11-16 11:06:26,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:26,282 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:06:26,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:26,283 INFO L85 PathProgramCache]: Analyzing trace with hash 171605262, now seen corresponding path program 2 times [2022-11-16 11:06:26,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:06:26,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1402392197] [2022-11-16 11:06:26,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:06:26,283 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:26,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:06:26,284 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:06:26,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-16 11:06:26,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:06:26,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:26,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:06:26,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:26,797 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:06:26,797 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:06:26,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:26,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:06:26,953 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:06:26,954 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:06:27,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:06:27,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:06:27,295 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:06:27,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1402392197] [2022-11-16 11:06:27,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1402392197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:06:27,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:06:27,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:06:27,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833914711] [2022-11-16 11:06:27,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:27,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:06:27,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:06:27,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:06:27,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:27,297 INFO L87 Difference]: Start difference. First operand 643 states and 1704 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:06:27,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:27,667 INFO L93 Difference]: Finished difference Result 664 states and 1726 transitions. [2022-11-16 11:06:27,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:06:27,668 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 13 [2022-11-16 11:06:27,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:27,669 INFO L225 Difference]: With dead ends: 664 [2022-11-16 11:06:27,670 INFO L226 Difference]: Without dead ends: 664 [2022-11-16 11:06:27,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:27,670 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:27,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 71 Unchecked, 0.4s Time] [2022-11-16 11:06:27,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-11-16 11:06:27,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 643. [2022-11-16 11:06:27,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 591 states have (on average 2.883248730964467) internal successors, (1704), 642 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:27,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1704 transitions. [2022-11-16 11:06:27,681 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1704 transitions. Word has length 13 [2022-11-16 11:06:27,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:27,681 INFO L495 AbstractCegarLoop]: Abstraction has 643 states and 1704 transitions. [2022-11-16 11:06:27,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:06:27,682 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1704 transitions. [2022-11-16 11:06:27,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:06:27,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:27,683 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:27,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:27,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:27,898 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:06:27,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:27,899 INFO L85 PathProgramCache]: Analyzing trace with hash 171610749, now seen corresponding path program 1 times [2022-11-16 11:06:27,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:06:27,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [716400339] [2022-11-16 11:06:27,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:27,899 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:27,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:06:27,900 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:06:27,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-16 11:06:28,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:28,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:06:28,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:28,504 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:06:28,504 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:06:28,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:28,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:06:28,686 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:06:28,686 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:06:29,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:06:29,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:06:29,067 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:06:29,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [716400339] [2022-11-16 11:06:29,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [716400339] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:06:29,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:06:29,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:06:29,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957884289] [2022-11-16 11:06:29,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:29,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:06:29,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:06:29,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:06:29,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:29,068 INFO L87 Difference]: Start difference. First operand 643 states and 1704 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:06:29,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:29,448 INFO L93 Difference]: Finished difference Result 665 states and 1727 transitions. [2022-11-16 11:06:29,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:06:29,449 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 13 [2022-11-16 11:06:29,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:29,450 INFO L225 Difference]: With dead ends: 665 [2022-11-16 11:06:29,451 INFO L226 Difference]: Without dead ends: 665 [2022-11-16 11:06:29,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:29,451 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:29,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 43 Unchecked, 0.4s Time] [2022-11-16 11:06:29,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-11-16 11:06:29,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 641. [2022-11-16 11:06:29,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 589 states have (on average 2.8879456706281834) internal successors, (1701), 640 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:29,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 1701 transitions. [2022-11-16 11:06:29,468 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 1701 transitions. Word has length 13 [2022-11-16 11:06:29,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:29,468 INFO L495 AbstractCegarLoop]: Abstraction has 641 states and 1701 transitions. [2022-11-16 11:06:29,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:06:29,468 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 1701 transitions. [2022-11-16 11:06:29,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:06:29,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:29,469 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:29,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:29,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:29,686 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:06:29,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:29,687 INFO L85 PathProgramCache]: Analyzing trace with hash 171584802, now seen corresponding path program 3 times [2022-11-16 11:06:29,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:06:29,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [583603084] [2022-11-16 11:06:29,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:06:29,687 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:29,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:06:29,688 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:06:29,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-16 11:06:30,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 11:06:30,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:30,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:06:30,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:30,175 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:06:30,175 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:06:30,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:30,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:06:30,375 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:06:30,375 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:06:30,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:06:30,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:06:30,679 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:06:30,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [583603084] [2022-11-16 11:06:30,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [583603084] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:06:30,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:06:30,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:06:30,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323676542] [2022-11-16 11:06:30,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:30,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:06:30,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:06:30,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:06:30,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:30,681 INFO L87 Difference]: Start difference. First operand 641 states and 1701 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:06:31,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:31,056 INFO L93 Difference]: Finished difference Result 662 states and 1723 transitions. [2022-11-16 11:06:31,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:06:31,056 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 13 [2022-11-16 11:06:31,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:31,058 INFO L225 Difference]: With dead ends: 662 [2022-11-16 11:06:31,058 INFO L226 Difference]: Without dead ends: 662 [2022-11-16 11:06:31,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:31,059 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:31,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 43 Unchecked, 0.4s Time] [2022-11-16 11:06:31,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-11-16 11:06:31,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 641. [2022-11-16 11:06:31,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 589 states have (on average 2.8879456706281834) internal successors, (1701), 640 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:31,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 1701 transitions. [2022-11-16 11:06:31,072 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 1701 transitions. Word has length 13 [2022-11-16 11:06:31,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:31,073 INFO L495 AbstractCegarLoop]: Abstraction has 641 states and 1701 transitions. [2022-11-16 11:06:31,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:06:31,073 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 1701 transitions. [2022-11-16 11:06:31,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:06:31,074 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:31,074 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:31,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Ended with exit code 0 [2022-11-16 11:06:31,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:31,275 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:06:31,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:31,276 INFO L85 PathProgramCache]: Analyzing trace with hash 171754899, now seen corresponding path program 2 times [2022-11-16 11:06:31,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:06:31,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [983828026] [2022-11-16 11:06:31,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:06:31,276 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:31,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:06:31,277 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:06:31,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-16 11:06:31,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:06:31,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:31,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:06:31,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:31,770 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:06:31,770 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:06:31,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:31,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:06:31,955 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:06:31,955 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:06:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:06:32,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:06:32,270 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:06:32,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [983828026] [2022-11-16 11:06:32,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [983828026] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:06:32,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:06:32,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:06:32,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374305255] [2022-11-16 11:06:32,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:32,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:06:32,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:06:32,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:06:32,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:32,272 INFO L87 Difference]: Start difference. First operand 641 states and 1701 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:06:32,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:32,745 INFO L93 Difference]: Finished difference Result 664 states and 1724 transitions. [2022-11-16 11:06:32,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:06:32,746 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 13 [2022-11-16 11:06:32,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:32,748 INFO L225 Difference]: With dead ends: 664 [2022-11-16 11:06:32,748 INFO L226 Difference]: Without dead ends: 659 [2022-11-16 11:06:32,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:32,749 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 4 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:32,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 0 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 43 Unchecked, 0.5s Time] [2022-11-16 11:06:32,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-11-16 11:06:32,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 639. [2022-11-16 11:06:32,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 587 states have (on average 2.8875638841567293) internal successors, (1695), 638 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:32,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1695 transitions. [2022-11-16 11:06:32,758 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1695 transitions. Word has length 13 [2022-11-16 11:06:32,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:32,758 INFO L495 AbstractCegarLoop]: Abstraction has 639 states and 1695 transitions. [2022-11-16 11:06:32,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:06:32,759 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1695 transitions. [2022-11-16 11:06:32,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:06:32,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:32,759 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:32,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:32,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:32,962 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:06:32,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:32,963 INFO L85 PathProgramCache]: Analyzing trace with hash 173660562, now seen corresponding path program 4 times [2022-11-16 11:06:32,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:06:32,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1366344151] [2022-11-16 11:06:32,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:06:32,963 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:32,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:06:32,964 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:06:32,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-16 11:06:33,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:06:33,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:33,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:06:33,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:33,583 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:06:33,583 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:06:33,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:33,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:06:33,750 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:06:33,750 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:06:34,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:06:34,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:06:34,114 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:06:34,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1366344151] [2022-11-16 11:06:34,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1366344151] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:06:34,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:06:34,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:06:34,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556177394] [2022-11-16 11:06:34,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:34,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:06:34,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:06:34,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:06:34,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:34,116 INFO L87 Difference]: Start difference. First operand 639 states and 1695 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:06:34,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:34,517 INFO L93 Difference]: Finished difference Result 655 states and 1711 transitions. [2022-11-16 11:06:34,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:06:34,518 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 13 [2022-11-16 11:06:34,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:34,519 INFO L225 Difference]: With dead ends: 655 [2022-11-16 11:06:34,519 INFO L226 Difference]: Without dead ends: 655 [2022-11-16 11:06:34,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:34,520 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:34,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 43 Unchecked, 0.4s Time] [2022-11-16 11:06:34,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-11-16 11:06:34,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 635. [2022-11-16 11:06:34,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 583 states have (on average 2.8987993138936536) internal successors, (1690), 634 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:34,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1690 transitions. [2022-11-16 11:06:34,533 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1690 transitions. Word has length 13 [2022-11-16 11:06:34,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:34,534 INFO L495 AbstractCegarLoop]: Abstraction has 635 states and 1690 transitions. [2022-11-16 11:06:34,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:06:34,534 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1690 transitions. [2022-11-16 11:06:34,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:06:34,534 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:34,535 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:34,553 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Ended with exit code 0 [2022-11-16 11:06:34,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:34,735 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:06:34,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:34,736 INFO L85 PathProgramCache]: Analyzing trace with hash 178933569, now seen corresponding path program 3 times [2022-11-16 11:06:34,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:06:34,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1729588663] [2022-11-16 11:06:34,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:06:34,736 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:34,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:06:34,738 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:06:34,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-16 11:06:35,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 11:06:35,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:35,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:06:35,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:35,256 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:06:35,256 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:06:35,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:35,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:06:35,415 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:06:35,416 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:06:35,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:06:35,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:06:35,705 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:06:35,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1729588663] [2022-11-16 11:06:35,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1729588663] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:06:35,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:06:35,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:06:35,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590736618] [2022-11-16 11:06:35,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:35,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:06:35,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:06:35,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:06:35,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:35,706 INFO L87 Difference]: Start difference. First operand 635 states and 1690 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:06:36,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:36,100 INFO L93 Difference]: Finished difference Result 656 states and 1712 transitions. [2022-11-16 11:06:36,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:06:36,101 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 13 [2022-11-16 11:06:36,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:36,103 INFO L225 Difference]: With dead ends: 656 [2022-11-16 11:06:36,103 INFO L226 Difference]: Without dead ends: 656 [2022-11-16 11:06:36,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:36,103 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:36,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 43 Unchecked, 0.4s Time] [2022-11-16 11:06:36,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2022-11-16 11:06:36,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 635. [2022-11-16 11:06:36,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 583 states have (on average 2.8987993138936536) internal successors, (1690), 634 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:36,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1690 transitions. [2022-11-16 11:06:36,115 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1690 transitions. Word has length 13 [2022-11-16 11:06:36,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:36,115 INFO L495 AbstractCegarLoop]: Abstraction has 635 states and 1690 transitions. [2022-11-16 11:06:36,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:06:36,115 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1690 transitions. [2022-11-16 11:06:36,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:06:36,115 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:36,116 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:36,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Ended with exit code 0 [2022-11-16 11:06:36,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:36,316 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:06:36,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:36,317 INFO L85 PathProgramCache]: Analyzing trace with hash 194126979, now seen corresponding path program 4 times [2022-11-16 11:06:36,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:06:36,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733609843] [2022-11-16 11:06:36,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:06:36,317 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:36,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:06:36,318 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:06:36,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2022-11-16 11:06:36,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:06:36,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:36,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:06:36,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:36,943 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:06:36,943 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:06:37,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:37,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:06:37,132 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:06:37,132 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:06:37,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:06:37,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:06:37,488 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:06:37,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [733609843] [2022-11-16 11:06:37,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [733609843] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:06:37,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:06:37,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:06:37,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504414232] [2022-11-16 11:06:37,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:37,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:06:37,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:06:37,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:06:37,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:37,489 INFO L87 Difference]: Start difference. First operand 635 states and 1690 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:06:37,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:37,881 INFO L93 Difference]: Finished difference Result 652 states and 1706 transitions. [2022-11-16 11:06:37,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:06:37,882 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 13 [2022-11-16 11:06:37,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:37,884 INFO L225 Difference]: With dead ends: 652 [2022-11-16 11:06:37,884 INFO L226 Difference]: Without dead ends: 647 [2022-11-16 11:06:37,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:37,885 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 5 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:37,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 0 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 77 Unchecked, 0.4s Time] [2022-11-16 11:06:37,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-11-16 11:06:37,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 630. [2022-11-16 11:06:37,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 578 states have (on average 2.911764705882353) internal successors, (1683), 629 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:37,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 1683 transitions. [2022-11-16 11:06:37,896 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 1683 transitions. Word has length 13 [2022-11-16 11:06:37,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:37,896 INFO L495 AbstractCegarLoop]: Abstraction has 630 states and 1683 transitions. [2022-11-16 11:06:37,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:06:37,896 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 1683 transitions. [2022-11-16 11:06:37,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:06:37,896 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:37,897 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:37,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Ended with exit code 0 [2022-11-16 11:06:38,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:38,097 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:06:38,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:38,098 INFO L85 PathProgramCache]: Analyzing trace with hash 341627378, now seen corresponding path program 1 times [2022-11-16 11:06:38,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:06:38,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1347911330] [2022-11-16 11:06:38,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:38,098 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:38,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:06:38,099 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:06:38,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-16 11:06:38,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:38,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:06:38,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:38,735 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:06:38,735 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:06:38,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:38,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:06:38,917 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:06:38,918 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:06:39,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:39,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:06:39,273 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:06:39,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1347911330] [2022-11-16 11:06:39,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1347911330] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:06:39,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:06:39,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:06:39,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857003231] [2022-11-16 11:06:39,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:39,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:06:39,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:06:39,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:06:39,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:39,275 INFO L87 Difference]: Start difference. First operand 630 states and 1683 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:06:39,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:39,674 INFO L93 Difference]: Finished difference Result 640 states and 1695 transitions. [2022-11-16 11:06:39,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:06:39,675 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 13 [2022-11-16 11:06:39,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:39,677 INFO L225 Difference]: With dead ends: 640 [2022-11-16 11:06:39,677 INFO L226 Difference]: Without dead ends: 635 [2022-11-16 11:06:39,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:39,677 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:39,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 41 Unchecked, 0.4s Time] [2022-11-16 11:06:39,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2022-11-16 11:06:39,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 634. [2022-11-16 11:06:39,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 582 states have (on average 2.8986254295532645) internal successors, (1687), 633 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:39,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1687 transitions. [2022-11-16 11:06:39,687 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1687 transitions. Word has length 13 [2022-11-16 11:06:39,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:39,687 INFO L495 AbstractCegarLoop]: Abstraction has 634 states and 1687 transitions. [2022-11-16 11:06:39,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:06:39,688 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1687 transitions. [2022-11-16 11:06:39,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:06:39,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:39,688 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:39,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:39,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:39,890 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:06:39,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:39,891 INFO L85 PathProgramCache]: Analyzing trace with hash 416016679, now seen corresponding path program 1 times [2022-11-16 11:06:39,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:06:39,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1520021291] [2022-11-16 11:06:39,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:39,891 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:39,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:06:39,893 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:06:39,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-16 11:06:40,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:40,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:06:40,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:40,499 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:06:40,499 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:06:40,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:40,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:06:40,656 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:06:40,656 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:06:40,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:40,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:06:40,979 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:06:40,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1520021291] [2022-11-16 11:06:40,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1520021291] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:06:40,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:06:40,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:06:40,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988240359] [2022-11-16 11:06:40,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:40,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:06:40,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:06:40,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:06:40,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:40,981 INFO L87 Difference]: Start difference. First operand 634 states and 1687 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:06:41,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:41,368 INFO L93 Difference]: Finished difference Result 639 states and 1691 transitions. [2022-11-16 11:06:41,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:06:41,369 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 13 [2022-11-16 11:06:41,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:41,370 INFO L225 Difference]: With dead ends: 639 [2022-11-16 11:06:41,370 INFO L226 Difference]: Without dead ends: 626 [2022-11-16 11:06:41,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:41,371 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:41,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 41 Unchecked, 0.4s Time] [2022-11-16 11:06:41,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2022-11-16 11:06:41,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 625. [2022-11-16 11:06:41,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 573 states have (on average 2.919720767888307) internal successors, (1673), 624 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:41,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1673 transitions. [2022-11-16 11:06:41,381 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1673 transitions. Word has length 13 [2022-11-16 11:06:41,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:41,381 INFO L495 AbstractCegarLoop]: Abstraction has 625 states and 1673 transitions. [2022-11-16 11:06:41,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:06:41,381 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1673 transitions. [2022-11-16 11:06:41,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:06:41,381 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:41,381 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:41,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Ended with exit code 0 [2022-11-16 11:06:41,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:41,582 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:06:41,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:41,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1234903924, now seen corresponding path program 1 times [2022-11-16 11:06:41,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:06:41,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [260647184] [2022-11-16 11:06:41,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:41,583 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:41,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:06:41,585 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:06:41,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-16 11:06:42,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:42,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:06:42,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:42,271 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:06:42,272 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:06:42,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:42,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:06:42,452 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:06:42,453 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:06:42,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:06:42,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:06:42,706 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:06:42,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [260647184] [2022-11-16 11:06:42,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [260647184] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:06:42,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:06:42,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:06:42,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689957996] [2022-11-16 11:06:42,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:42,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:06:42,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:06:42,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:06:42,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:42,708 INFO L87 Difference]: Start difference. First operand 625 states and 1673 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:06:43,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:43,030 INFO L93 Difference]: Finished difference Result 643 states and 1716 transitions. [2022-11-16 11:06:43,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:06:43,031 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 13 [2022-11-16 11:06:43,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:43,033 INFO L225 Difference]: With dead ends: 643 [2022-11-16 11:06:43,033 INFO L226 Difference]: Without dead ends: 643 [2022-11-16 11:06:43,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:43,033 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 6 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:43,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 0 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 80 Unchecked, 0.3s Time] [2022-11-16 11:06:43,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-11-16 11:06:43,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 627. [2022-11-16 11:06:43,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 575 states have (on average 2.92) internal successors, (1679), 626 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:43,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1679 transitions. [2022-11-16 11:06:43,043 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1679 transitions. Word has length 13 [2022-11-16 11:06:43,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:43,043 INFO L495 AbstractCegarLoop]: Abstraction has 627 states and 1679 transitions. [2022-11-16 11:06:43,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:06:43,044 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1679 transitions. [2022-11-16 11:06:43,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:06:43,044 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:43,044 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:43,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:43,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:43,245 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:06:43,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:43,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1239449764, now seen corresponding path program 2 times [2022-11-16 11:06:43,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:06:43,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [494537800] [2022-11-16 11:06:43,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:06:43,246 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:43,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:06:43,247 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:06:43,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-16 11:06:43,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:06:43,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:43,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:06:43,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:43,764 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:06:43,765 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:06:43,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:43,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:06:43,941 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:06:43,941 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:06:44,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:06:44,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:06:44,213 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:06:44,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [494537800] [2022-11-16 11:06:44,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [494537800] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:06:44,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:06:44,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:06:44,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386149069] [2022-11-16 11:06:44,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:44,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:06:44,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:06:44,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:06:44,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:44,215 INFO L87 Difference]: Start difference. First operand 627 states and 1679 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:06:44,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:44,579 INFO L93 Difference]: Finished difference Result 631 states and 1685 transitions. [2022-11-16 11:06:44,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:06:44,579 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 13 [2022-11-16 11:06:44,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:44,581 INFO L225 Difference]: With dead ends: 631 [2022-11-16 11:06:44,581 INFO L226 Difference]: Without dead ends: 631 [2022-11-16 11:06:44,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:44,582 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:44,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 43 Unchecked, 0.4s Time] [2022-11-16 11:06:44,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-11-16 11:06:44,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 627. [2022-11-16 11:06:44,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 575 states have (on average 2.92) internal successors, (1679), 626 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:44,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1679 transitions. [2022-11-16 11:06:44,591 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1679 transitions. Word has length 13 [2022-11-16 11:06:44,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:44,592 INFO L495 AbstractCegarLoop]: Abstraction has 627 states and 1679 transitions. [2022-11-16 11:06:44,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:06:44,592 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1679 transitions. [2022-11-16 11:06:44,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:06:44,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:44,593 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:44,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:44,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:44,800 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:06:44,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:44,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1239455251, now seen corresponding path program 1 times [2022-11-16 11:06:44,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:06:44,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [41599612] [2022-11-16 11:06:44,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:44,801 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:44,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:06:44,802 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:06:44,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2022-11-16 11:06:45,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:45,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:06:45,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:45,457 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:06:45,458 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:06:45,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:45,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:06:45,635 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:06:45,636 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:06:45,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:06:45,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:06:45,935 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:06:45,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [41599612] [2022-11-16 11:06:45,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [41599612] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:06:45,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:06:45,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:06:45,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773709984] [2022-11-16 11:06:45,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:45,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:06:45,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:06:45,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:06:45,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:45,936 INFO L87 Difference]: Start difference. First operand 627 states and 1679 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:06:46,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:46,297 INFO L93 Difference]: Finished difference Result 631 states and 1685 transitions. [2022-11-16 11:06:46,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:06:46,298 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 13 [2022-11-16 11:06:46,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:46,299 INFO L225 Difference]: With dead ends: 631 [2022-11-16 11:06:46,299 INFO L226 Difference]: Without dead ends: 631 [2022-11-16 11:06:46,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:46,300 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:46,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 43 Unchecked, 0.4s Time] [2022-11-16 11:06:46,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-11-16 11:06:46,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 627. [2022-11-16 11:06:46,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 575 states have (on average 2.92) internal successors, (1679), 626 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:46,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1679 transitions. [2022-11-16 11:06:46,315 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1679 transitions. Word has length 13 [2022-11-16 11:06:46,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:46,316 INFO L495 AbstractCegarLoop]: Abstraction has 627 states and 1679 transitions. [2022-11-16 11:06:46,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:06:46,316 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1679 transitions. [2022-11-16 11:06:46,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:06:46,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:46,317 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:46,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:46,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:46,534 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:06:46,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:46,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1239516724, now seen corresponding path program 3 times [2022-11-16 11:06:46,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:06:46,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [275016960] [2022-11-16 11:06:46,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:06:46,535 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:46,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:06:46,536 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:06:46,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-16 11:06:46,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 11:06:46,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:46,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:06:46,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:47,040 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:06:47,040 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:06:47,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:47,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:06:47,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:47,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:06:47,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:06:47,495 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:06:47,495 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:06:47,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [275016960] [2022-11-16 11:06:47,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [275016960] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:06:47,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:06:47,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:06:47,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310085700] [2022-11-16 11:06:47,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:47,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:06:47,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:06:47,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:06:47,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:47,497 INFO L87 Difference]: Start difference. First operand 627 states and 1679 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:06:48,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:48,102 INFO L93 Difference]: Finished difference Result 629 states and 1681 transitions. [2022-11-16 11:06:48,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:06:48,103 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 13 [2022-11-16 11:06:48,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:48,105 INFO L225 Difference]: With dead ends: 629 [2022-11-16 11:06:48,105 INFO L226 Difference]: Without dead ends: 629 [2022-11-16 11:06:48,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:06:48,105 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 4 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:48,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 0 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 47 Unchecked, 0.5s Time] [2022-11-16 11:06:48,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-11-16 11:06:48,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 624. [2022-11-16 11:06:48,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 572 states have (on average 2.9265734265734267) internal successors, (1674), 623 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:48,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 1674 transitions. [2022-11-16 11:06:48,115 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 1674 transitions. Word has length 13 [2022-11-16 11:06:48,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:48,115 INFO L495 AbstractCegarLoop]: Abstraction has 624 states and 1674 transitions. [2022-11-16 11:06:48,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:06:48,116 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 1674 transitions. [2022-11-16 11:06:48,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:06:48,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:48,116 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:48,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Ended with exit code 0 [2022-11-16 11:06:48,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:48,317 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:06:48,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:48,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1239686821, now seen corresponding path program 2 times [2022-11-16 11:06:48,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:06:48,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [775859747] [2022-11-16 11:06:48,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:06:48,318 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:48,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:06:48,319 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:06:48,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-16 11:06:48,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:06:48,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:48,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:06:48,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:48,886 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:06:48,886 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:06:48,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:48,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:06:49,054 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:06:49,055 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:06:49,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:06:49,377 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:06:49,377 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:06:49,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [775859747] [2022-11-16 11:06:49,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [775859747] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:06:49,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:06:49,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:06:49,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60941718] [2022-11-16 11:06:49,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:49,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:06:49,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:06:49,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:06:49,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:49,379 INFO L87 Difference]: Start difference. First operand 624 states and 1674 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:06:49,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:49,747 INFO L93 Difference]: Finished difference Result 628 states and 1680 transitions. [2022-11-16 11:06:49,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:06:49,748 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 13 [2022-11-16 11:06:49,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:49,750 INFO L225 Difference]: With dead ends: 628 [2022-11-16 11:06:49,750 INFO L226 Difference]: Without dead ends: 628 [2022-11-16 11:06:49,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:49,751 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:49,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 71 Unchecked, 0.4s Time] [2022-11-16 11:06:49,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-11-16 11:06:49,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 624. [2022-11-16 11:06:49,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 572 states have (on average 2.9265734265734267) internal successors, (1674), 623 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:49,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 1674 transitions. [2022-11-16 11:06:49,761 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 1674 transitions. Word has length 13 [2022-11-16 11:06:49,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:49,761 INFO L495 AbstractCegarLoop]: Abstraction has 624 states and 1674 transitions. [2022-11-16 11:06:49,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:06:49,761 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 1674 transitions. [2022-11-16 11:06:49,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:06:49,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:49,762 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:49,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Ended with exit code 0 [2022-11-16 11:06:49,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:49,962 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:06:49,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:49,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1240176931, now seen corresponding path program 3 times [2022-11-16 11:06:49,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:06:49,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [259884882] [2022-11-16 11:06:49,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:06:49,963 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:49,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:06:49,964 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:06:49,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-16 11:06:50,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 11:06:50,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:50,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:06:50,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:50,531 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:06:50,532 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:06:50,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:50,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:06:50,714 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:06:50,715 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:06:51,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:06:51,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:06:51,034 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:06:51,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [259884882] [2022-11-16 11:06:51,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [259884882] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:06:51,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:06:51,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:06:51,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435825118] [2022-11-16 11:06:51,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:51,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:06:51,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:06:51,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:06:51,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:51,036 INFO L87 Difference]: Start difference. First operand 624 states and 1674 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:06:51,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:51,451 INFO L93 Difference]: Finished difference Result 824 states and 2181 transitions. [2022-11-16 11:06:51,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:06:51,451 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 13 [2022-11-16 11:06:51,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:51,453 INFO L225 Difference]: With dead ends: 824 [2022-11-16 11:06:51,453 INFO L226 Difference]: Without dead ends: 824 [2022-11-16 11:06:51,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:51,454 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:51,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 0 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 146 Unchecked, 0.4s Time] [2022-11-16 11:06:51,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2022-11-16 11:06:51,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 631. [2022-11-16 11:06:51,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 579 states have (on average 2.918825561312608) internal successors, (1690), 630 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:51,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 1690 transitions. [2022-11-16 11:06:51,468 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 1690 transitions. Word has length 13 [2022-11-16 11:06:51,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:51,468 INFO L495 AbstractCegarLoop]: Abstraction has 631 states and 1690 transitions. [2022-11-16 11:06:51,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:06:51,468 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 1690 transitions. [2022-11-16 11:06:51,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:06:51,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:51,469 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:51,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Ended with exit code 0 [2022-11-16 11:06:51,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:51,669 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:06:51,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:51,670 INFO L85 PathProgramCache]: Analyzing trace with hash 829292838, now seen corresponding path program 1 times [2022-11-16 11:06:51,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:06:51,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1946279434] [2022-11-16 11:06:51,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:51,670 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:51,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:06:51,671 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:06:51,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-16 11:06:52,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:52,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:06:52,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:52,165 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-16 11:06:52,201 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:06:52,201 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-11-16 11:06:52,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:06:52,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:06:52,249 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:06:52,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1946279434] [2022-11-16 11:06:52,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1946279434] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:06:52,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:06:52,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:06:52,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999236355] [2022-11-16 11:06:52,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:52,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:06:52,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:06:52,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:06:52,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:06:52,251 INFO L87 Difference]: Start difference. First operand 631 states and 1690 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) 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) [2022-11-16 11:06:52,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:52,635 INFO L93 Difference]: Finished difference Result 492 states and 1266 transitions. [2022-11-16 11:06:52,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:06:52,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) 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 13 [2022-11-16 11:06:52,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:52,637 INFO L225 Difference]: With dead ends: 492 [2022-11-16 11:06:52,637 INFO L226 Difference]: Without dead ends: 492 [2022-11-16 11:06:52,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:06:52,637 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 60 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:52,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 0 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:06:52,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-11-16 11:06:52,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 492. [2022-11-16 11:06:52,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 462 states have (on average 2.74025974025974) internal successors, (1266), 491 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:52,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1266 transitions. [2022-11-16 11:06:52,648 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1266 transitions. Word has length 13 [2022-11-16 11:06:52,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:52,648 INFO L495 AbstractCegarLoop]: Abstraction has 492 states and 1266 transitions. [2022-11-16 11:06:52,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) 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) [2022-11-16 11:06:52,649 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1266 transitions. [2022-11-16 11:06:52,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:06:52,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:52,650 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:52,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:52,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:52,854 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:06:52,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:52,855 INFO L85 PathProgramCache]: Analyzing trace with hash 829292840, now seen corresponding path program 1 times [2022-11-16 11:06:52,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:06:52,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1159179524] [2022-11-16 11:06:52,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:52,855 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:52,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:06:52,856 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:06:52,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-16 11:06:53,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:53,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:06:53,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:53,403 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 11:06:53,423 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-16 11:06:53,573 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:06:53,574 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-16 11:06:53,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:06:53,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:53,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:06:57,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:57,652 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:06:57,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1159179524] [2022-11-16 11:06:57,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1159179524] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:06:57,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:06:57,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2022-11-16 11:06:57,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722460034] [2022-11-16 11:06:57,653 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:06:57,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:06:57,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:06:57,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:06:57,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:06:57,654 INFO L87 Difference]: Start difference. First operand 492 states and 1266 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:58,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:58,436 INFO L93 Difference]: Finished difference Result 756 states and 1989 transitions. [2022-11-16 11:06:58,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:06:58,437 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 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 [2022-11-16 11:06:58,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:58,439 INFO L225 Difference]: With dead ends: 756 [2022-11-16 11:06:58,439 INFO L226 Difference]: Without dead ends: 756 [2022-11-16 11:06:58,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:06:58,442 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:58,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 0 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 144 Invalid, 0 Unknown, 183 Unchecked, 0.8s Time] [2022-11-16 11:06:58,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2022-11-16 11:06:58,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 722. [2022-11-16 11:06:58,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 692 states have (on average 2.8179190751445087) internal successors, (1950), 721 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:58,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 1950 transitions. [2022-11-16 11:06:58,460 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 1950 transitions. Word has length 13 [2022-11-16 11:06:58,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:58,461 INFO L495 AbstractCegarLoop]: Abstraction has 722 states and 1950 transitions. [2022-11-16 11:06:58,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:58,461 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 1950 transitions. [2022-11-16 11:06:58,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:06:58,462 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:58,462 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:58,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:58,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:58,679 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:06:58,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:58,679 INFO L85 PathProgramCache]: Analyzing trace with hash 970234440, now seen corresponding path program 1 times [2022-11-16 11:06:58,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:06:58,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1349891381] [2022-11-16 11:06:58,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:58,680 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:06:58,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:06:58,681 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:06:58,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-16 11:06:59,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:59,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:06:59,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:59,298 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:06:59,298 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:06:59,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:59,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:06:59,484 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:06:59,485 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:06:59,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:06:59,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:06:59,756 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:06:59,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1349891381] [2022-11-16 11:06:59,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1349891381] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:06:59,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:06:59,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:06:59,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46201309] [2022-11-16 11:06:59,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:59,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:06:59,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:06:59,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:06:59,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:06:59,757 INFO L87 Difference]: Start difference. First operand 722 states and 1950 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:07:00,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:00,160 INFO L93 Difference]: Finished difference Result 735 states and 1977 transitions. [2022-11-16 11:07:00,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:07:00,161 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 13 [2022-11-16 11:07:00,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:00,163 INFO L225 Difference]: With dead ends: 735 [2022-11-16 11:07:00,163 INFO L226 Difference]: Without dead ends: 735 [2022-11-16 11:07:00,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:07:00,164 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:00,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 48 Unchecked, 0.4s Time] [2022-11-16 11:07:00,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2022-11-16 11:07:00,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 722. [2022-11-16 11:07:00,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 692 states have (on average 2.8179190751445087) internal successors, (1950), 721 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:00,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 1950 transitions. [2022-11-16 11:07:00,177 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 1950 transitions. Word has length 13 [2022-11-16 11:07:00,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:00,177 INFO L495 AbstractCegarLoop]: Abstraction has 722 states and 1950 transitions. [2022-11-16 11:07:00,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:07:00,177 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 1950 transitions. [2022-11-16 11:07:00,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:07:00,178 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:00,178 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:07:00,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Forceful destruction successful, exit code 0 [2022-11-16 11:07:00,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:00,395 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:07:00,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:00,395 INFO L85 PathProgramCache]: Analyzing trace with hash 970213980, now seen corresponding path program 2 times [2022-11-16 11:07:00,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:07:00,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [270172487] [2022-11-16 11:07:00,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:07:00,396 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:00,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:07:00,397 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:07:00,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2022-11-16 11:07:00,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:07:00,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:07:00,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:07:00,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:07:00,934 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:07:00,935 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:07:01,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:07:01,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:07:01,111 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:07:01,111 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:07:01,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:07:01,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:07:01,405 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:07:01,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [270172487] [2022-11-16 11:07:01,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [270172487] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:07:01,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:07:01,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:07:01,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693612155] [2022-11-16 11:07:01,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:07:01,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:07:01,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:07:01,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:07:01,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:07:01,407 INFO L87 Difference]: Start difference. First operand 722 states and 1950 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:07:01,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:01,787 INFO L93 Difference]: Finished difference Result 745 states and 1997 transitions. [2022-11-16 11:07:01,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:07:01,788 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 13 [2022-11-16 11:07:01,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:01,790 INFO L225 Difference]: With dead ends: 745 [2022-11-16 11:07:01,790 INFO L226 Difference]: Without dead ends: 745 [2022-11-16 11:07:01,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:07:01,790 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:01,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 0 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 103 Unchecked, 0.4s Time] [2022-11-16 11:07:01,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2022-11-16 11:07:01,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 722. [2022-11-16 11:07:01,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 692 states have (on average 2.8179190751445087) internal successors, (1950), 721 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:01,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 1950 transitions. [2022-11-16 11:07:01,802 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 1950 transitions. Word has length 13 [2022-11-16 11:07:01,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:01,803 INFO L495 AbstractCegarLoop]: Abstraction has 722 states and 1950 transitions. [2022-11-16 11:07:01,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:07:01,803 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 1950 transitions. [2022-11-16 11:07:01,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:07:01,804 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:01,804 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:07:01,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Forceful destruction successful, exit code 0 [2022-11-16 11:07:02,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:02,005 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:07:02,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:02,005 INFO L85 PathProgramCache]: Analyzing trace with hash 970384077, now seen corresponding path program 1 times [2022-11-16 11:07:02,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:07:02,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [548992121] [2022-11-16 11:07:02,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:02,006 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:02,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:07:02,007 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:07:02,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-16 11:07:02,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:02,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:07:02,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:07:02,637 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:07:02,638 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:07:02,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:07:02,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:07:02,821 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:07:02,821 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:07:03,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:07:03,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:07:03,082 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:07:03,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [548992121] [2022-11-16 11:07:03,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [548992121] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:07:03,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:07:03,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:07:03,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600781431] [2022-11-16 11:07:03,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:07:03,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:07:03,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:07:03,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:07:03,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:07:03,084 INFO L87 Difference]: Start difference. First operand 722 states and 1950 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:07:03,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:03,503 INFO L93 Difference]: Finished difference Result 741 states and 1987 transitions. [2022-11-16 11:07:03,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:07:03,504 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 13 [2022-11-16 11:07:03,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:03,506 INFO L225 Difference]: With dead ends: 741 [2022-11-16 11:07:03,506 INFO L226 Difference]: Without dead ends: 741 [2022-11-16 11:07:03,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:07:03,506 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:03,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 55 Unchecked, 0.4s Time] [2022-11-16 11:07:03,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-11-16 11:07:03,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 722. [2022-11-16 11:07:03,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 692 states have (on average 2.8179190751445087) internal successors, (1950), 721 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:03,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 1950 transitions. [2022-11-16 11:07:03,518 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 1950 transitions. Word has length 13 [2022-11-16 11:07:03,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:03,518 INFO L495 AbstractCegarLoop]: Abstraction has 722 states and 1950 transitions. [2022-11-16 11:07:03,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:07:03,518 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 1950 transitions. [2022-11-16 11:07:03,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:07:03,519 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:03,519 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:07:03,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Forceful destruction successful, exit code 0 [2022-11-16 11:07:03,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:03,720 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:07:03,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:03,720 INFO L85 PathProgramCache]: Analyzing trace with hash 972289740, now seen corresponding path program 3 times [2022-11-16 11:07:03,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:07:03,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [212598163] [2022-11-16 11:07:03,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:07:03,721 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:03,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:07:03,722 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:07:03,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-11-16 11:07:04,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 11:07:04,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:07:04,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:07:04,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:07:04,283 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:07:04,283 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:07:04,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:07:04,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:07:04,462 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:07:04,463 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:07:04,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:07:04,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:07:04,726 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:07:04,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [212598163] [2022-11-16 11:07:04,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [212598163] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:07:04,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:07:04,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:07:04,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447415426] [2022-11-16 11:07:04,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:07:04,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:07:04,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:07:04,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:07:04,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:07:04,728 INFO L87 Difference]: Start difference. First operand 722 states and 1950 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:07:05,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:05,160 INFO L93 Difference]: Finished difference Result 727 states and 1956 transitions. [2022-11-16 11:07:05,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:07:05,161 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 13 [2022-11-16 11:07:05,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:05,163 INFO L225 Difference]: With dead ends: 727 [2022-11-16 11:07:05,163 INFO L226 Difference]: Without dead ends: 727 [2022-11-16 11:07:05,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:07:05,163 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:05,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 49 Unchecked, 0.4s Time] [2022-11-16 11:07:05,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2022-11-16 11:07:05,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 716. [2022-11-16 11:07:05,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 686 states have (on average 2.825072886297376) internal successors, (1938), 715 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:05,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1938 transitions. [2022-11-16 11:07:05,174 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1938 transitions. Word has length 13 [2022-11-16 11:07:05,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:05,175 INFO L495 AbstractCegarLoop]: Abstraction has 716 states and 1938 transitions. [2022-11-16 11:07:05,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:07:05,175 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1938 transitions. [2022-11-16 11:07:05,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:07:05,176 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:05,176 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:07:05,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Forceful destruction successful, exit code 0 [2022-11-16 11:07:05,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:05,376 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:07:05,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:05,377 INFO L85 PathProgramCache]: Analyzing trace with hash 977562747, now seen corresponding path program 2 times [2022-11-16 11:07:05,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:07:05,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1556888260] [2022-11-16 11:07:05,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:07:05,377 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:05,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:07:05,378 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:07:05,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2022-11-16 11:07:05,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:07:05,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:07:05,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:07:05,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:07:05,953 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:07:05,953 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:07:06,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:07:06,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:07:06,144 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:07:06,144 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:07:06,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:07:06,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:07:06,414 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:07:06,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1556888260] [2022-11-16 11:07:06,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1556888260] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:07:06,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:07:06,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:07:06,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276270968] [2022-11-16 11:07:06,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:07:06,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:07:06,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:07:06,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:07:06,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:07:06,417 INFO L87 Difference]: Start difference. First operand 716 states and 1938 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:07:06,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:06,841 INFO L93 Difference]: Finished difference Result 721 states and 1945 transitions. [2022-11-16 11:07:06,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:07:06,842 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 13 [2022-11-16 11:07:06,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:06,844 INFO L225 Difference]: With dead ends: 721 [2022-11-16 11:07:06,844 INFO L226 Difference]: Without dead ends: 721 [2022-11-16 11:07:06,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:07:06,844 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:06,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 63 Unchecked, 0.4s Time] [2022-11-16 11:07:06,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2022-11-16 11:07:06,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 717. [2022-11-16 11:07:06,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 687 states have (on average 2.8209606986899565) internal successors, (1938), 716 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:06,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 1938 transitions. [2022-11-16 11:07:06,856 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 1938 transitions. Word has length 13 [2022-11-16 11:07:06,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:06,856 INFO L495 AbstractCegarLoop]: Abstraction has 717 states and 1938 transitions. [2022-11-16 11:07:06,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-16 11:07:06,856 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 1938 transitions. [2022-11-16 11:07:06,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:07:06,857 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:06,857 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:07:06,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Forceful destruction successful, exit code 0 [2022-11-16 11:07:07,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:07,057 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:07:07,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:07,058 INFO L85 PathProgramCache]: Analyzing trace with hash 950574770, now seen corresponding path program 1 times [2022-11-16 11:07:07,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:07:07,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [7228392] [2022-11-16 11:07:07,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:07,059 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:07,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:07:07,060 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:07:07,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2022-11-16 11:07:07,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:07,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:07:07,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:07:07,745 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:07:07,746 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:07:07,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:07:07,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:07:07,903 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:07:07,903 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:07:08,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:07:08,235 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:07:08,235 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:07:08,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [7228392] [2022-11-16 11:07:08,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [7228392] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:07:08,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:07:08,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:07:08,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3258274] [2022-11-16 11:07:08,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:07:08,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:07:08,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:07:08,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:07:08,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:07:08,237 INFO L87 Difference]: Start difference. First operand 717 states and 1938 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:08,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:08,605 INFO L93 Difference]: Finished difference Result 733 states and 1955 transitions. [2022-11-16 11:07:08,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:07:08,606 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2022-11-16 11:07:08,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:08,608 INFO L225 Difference]: With dead ends: 733 [2022-11-16 11:07:08,608 INFO L226 Difference]: Without dead ends: 728 [2022-11-16 11:07:08,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:07:08,608 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:08,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 67 Unchecked, 0.4s Time] [2022-11-16 11:07:08,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-11-16 11:07:08,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 711. [2022-11-16 11:07:08,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 682 states have (on average 2.8284457478005867) internal successors, (1929), 710 states have internal predecessors, (1929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:08,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1929 transitions. [2022-11-16 11:07:08,621 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1929 transitions. Word has length 14 [2022-11-16 11:07:08,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:08,622 INFO L495 AbstractCegarLoop]: Abstraction has 711 states and 1929 transitions. [2022-11-16 11:07:08,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:08,622 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1929 transitions. [2022-11-16 11:07:08,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:07:08,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:08,623 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:07:08,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Forceful destruction successful, exit code 0 [2022-11-16 11:07:08,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:08,823 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:07:08,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:08,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1024964071, now seen corresponding path program 1 times [2022-11-16 11:07:08,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:07:08,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1379478872] [2022-11-16 11:07:08,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:08,824 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:08,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:07:08,825 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:07:08,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-16 11:07:09,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:09,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:07:09,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:07:09,532 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:07:09,532 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:07:09,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:07:09,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:07:09,699 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:07:09,700 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:07:10,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:07:10,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:07:10,048 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:07:10,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1379478872] [2022-11-16 11:07:10,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1379478872] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:07:10,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:07:10,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:07:10,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591210702] [2022-11-16 11:07:10,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:07:10,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:07:10,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:07:10,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:07:10,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:07:10,049 INFO L87 Difference]: Start difference. First operand 711 states and 1929 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:10,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:10,423 INFO L93 Difference]: Finished difference Result 727 states and 1946 transitions. [2022-11-16 11:07:10,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:07:10,424 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2022-11-16 11:07:10,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:10,426 INFO L225 Difference]: With dead ends: 727 [2022-11-16 11:07:10,426 INFO L226 Difference]: Without dead ends: 714 [2022-11-16 11:07:10,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:07:10,426 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:10,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 40 Unchecked, 0.4s Time] [2022-11-16 11:07:10,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-11-16 11:07:10,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 680. [2022-11-16 11:07:10,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 652 states have (on average 2.8803680981595092) internal successors, (1878), 679 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:10,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 1878 transitions. [2022-11-16 11:07:10,439 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 1878 transitions. Word has length 14 [2022-11-16 11:07:10,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:10,439 INFO L495 AbstractCegarLoop]: Abstraction has 680 states and 1878 transitions. [2022-11-16 11:07:10,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:10,439 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 1878 transitions. [2022-11-16 11:07:10,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:07:10,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:10,440 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:07:10,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Forceful destruction successful, exit code 0 [2022-11-16 11:07:10,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:10,641 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:07:10,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:10,641 INFO L85 PathProgramCache]: Analyzing trace with hash -372688204, now seen corresponding path program 1 times [2022-11-16 11:07:10,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:07:10,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1909067015] [2022-11-16 11:07:10,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:10,642 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:10,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:07:10,643 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:07:10,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2022-11-16 11:07:11,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:11,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 11:07:11,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:07:11,273 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 11:07:11,431 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 11:07:11,431 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 22 [2022-11-16 11:07:12,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:07:12,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:07:15,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:07:15,405 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:07:15,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1909067015] [2022-11-16 11:07:15,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1909067015] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:07:15,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:07:15,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-11-16 11:07:15,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426171462] [2022-11-16 11:07:15,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:07:15,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:07:15,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:07:15,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:07:15,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:07:15,406 INFO L87 Difference]: Start difference. First operand 680 states and 1878 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:15,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:15,880 INFO L93 Difference]: Finished difference Result 719 states and 1957 transitions. [2022-11-16 11:07:15,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:07:15,881 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 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 14 [2022-11-16 11:07:15,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:15,883 INFO L225 Difference]: With dead ends: 719 [2022-11-16 11:07:15,883 INFO L226 Difference]: Without dead ends: 719 [2022-11-16 11:07:15,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:07:15,883 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 239 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:15,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 239 Unchecked, 0.5s Time] [2022-11-16 11:07:15,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2022-11-16 11:07:15,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 694. [2022-11-16 11:07:15,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 666 states have (on average 2.869369369369369) internal successors, (1911), 693 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:15,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1911 transitions. [2022-11-16 11:07:15,896 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1911 transitions. Word has length 14 [2022-11-16 11:07:15,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:15,896 INFO L495 AbstractCegarLoop]: Abstraction has 694 states and 1911 transitions. [2022-11-16 11:07:15,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:15,896 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1911 transitions. [2022-11-16 11:07:15,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:07:15,897 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:15,897 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:07:15,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Ended with exit code 0 [2022-11-16 11:07:16,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:16,097 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:07:16,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:16,098 INFO L85 PathProgramCache]: Analyzing trace with hash -231746604, now seen corresponding path program 1 times [2022-11-16 11:07:16,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:07:16,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1178448645] [2022-11-16 11:07:16,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:16,098 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:16,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:07:16,099 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:07:16,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2022-11-16 11:07:16,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:16,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:07:16,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:07:16,781 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:07:16,781 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:07:16,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:07:16,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:07:16,951 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:07:16,951 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:07:17,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:07:17,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:07:17,247 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:07:17,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1178448645] [2022-11-16 11:07:17,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1178448645] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:07:17,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:07:17,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:07:17,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317462529] [2022-11-16 11:07:17,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:07:17,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:07:17,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:07:17,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:07:17,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:07:17,249 INFO L87 Difference]: Start difference. First operand 694 states and 1911 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:17,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:17,577 INFO L93 Difference]: Finished difference Result 707 states and 1936 transitions. [2022-11-16 11:07:17,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:07:17,578 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2022-11-16 11:07:17,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:17,579 INFO L225 Difference]: With dead ends: 707 [2022-11-16 11:07:17,579 INFO L226 Difference]: Without dead ends: 707 [2022-11-16 11:07:17,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:07:17,580 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:17,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 41 Unchecked, 0.3s Time] [2022-11-16 11:07:17,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2022-11-16 11:07:17,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 694. [2022-11-16 11:07:17,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 666 states have (on average 2.869369369369369) internal successors, (1911), 693 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:17,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1911 transitions. [2022-11-16 11:07:17,591 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1911 transitions. Word has length 14 [2022-11-16 11:07:17,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:17,591 INFO L495 AbstractCegarLoop]: Abstraction has 694 states and 1911 transitions. [2022-11-16 11:07:17,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:17,591 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1911 transitions. [2022-11-16 11:07:17,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:07:17,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:17,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:07:17,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Forceful destruction successful, exit code 0 [2022-11-16 11:07:17,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:17,792 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:07:17,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:17,793 INFO L85 PathProgramCache]: Analyzing trace with hash -231741217, now seen corresponding path program 1 times [2022-11-16 11:07:17,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:07:17,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [269605639] [2022-11-16 11:07:17,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:17,793 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:17,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:07:17,794 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:07:17,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (95)] Waiting until timeout for monitored process [2022-11-16 11:07:18,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:18,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:07:18,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:07:18,392 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 11:07:18,413 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-16 11:07:18,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:07:18,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:07:18,583 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:07:18,583 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-16 11:07:18,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:07:18,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:07:23,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:07:23,098 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:07:23,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [269605639] [2022-11-16 11:07:23,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [269605639] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:07:23,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:07:23,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-16 11:07:23,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399181536] [2022-11-16 11:07:23,098 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:07:23,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:07:23,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:07:23,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:07:23,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:07:23,099 INFO L87 Difference]: Start difference. First operand 694 states and 1911 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:23,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:23,678 INFO L93 Difference]: Finished difference Result 1024 states and 2735 transitions. [2022-11-16 11:07:23,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:07:23,678 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 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 14 [2022-11-16 11:07:23,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:23,681 INFO L225 Difference]: With dead ends: 1024 [2022-11-16 11:07:23,681 INFO L226 Difference]: Without dead ends: 1024 [2022-11-16 11:07:23,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:07:23,681 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 21 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:23,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 0 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 95 Unchecked, 0.6s Time] [2022-11-16 11:07:23,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2022-11-16 11:07:23,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 746. [2022-11-16 11:07:23,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 718 states have (on average 2.8119777158774375) internal successors, (2019), 745 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:23,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 2019 transitions. [2022-11-16 11:07:23,694 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 2019 transitions. Word has length 14 [2022-11-16 11:07:23,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:23,694 INFO L495 AbstractCegarLoop]: Abstraction has 746 states and 2019 transitions. [2022-11-16 11:07:23,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:23,694 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 2019 transitions. [2022-11-16 11:07:23,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:07:23,695 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:23,695 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:07:23,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (95)] Forceful destruction successful, exit code 0 [2022-11-16 11:07:23,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:23,896 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:07:23,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:23,896 INFO L85 PathProgramCache]: Analyzing trace with hash -231741117, now seen corresponding path program 1 times [2022-11-16 11:07:23,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:07:23,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [42166700] [2022-11-16 11:07:23,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:23,897 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:23,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:07:23,899 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:07:23,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (96)] Waiting until timeout for monitored process [2022-11-16 11:07:24,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:24,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:07:24,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:07:24,650 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:07:24,651 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:07:24,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:07:24,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:07:24,831 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:07:24,831 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:07:25,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:07:25,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:07:25,119 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:07:25,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [42166700] [2022-11-16 11:07:25,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [42166700] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:07:25,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:07:25,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:07:25,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603483117] [2022-11-16 11:07:25,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:07:25,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:07:25,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:07:25,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:07:25,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:07:25,121 INFO L87 Difference]: Start difference. First operand 746 states and 2019 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:25,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:25,451 INFO L93 Difference]: Finished difference Result 768 states and 2066 transitions. [2022-11-16 11:07:25,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:07:25,452 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2022-11-16 11:07:25,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:25,453 INFO L225 Difference]: With dead ends: 768 [2022-11-16 11:07:25,454 INFO L226 Difference]: Without dead ends: 768 [2022-11-16 11:07:25,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:07:25,454 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 14 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:25,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 0 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 86 Unchecked, 0.3s Time] [2022-11-16 11:07:25,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2022-11-16 11:07:25,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 742. [2022-11-16 11:07:25,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 714 states have (on average 2.8137254901960786) internal successors, (2009), 741 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:25,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2009 transitions. [2022-11-16 11:07:25,465 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2009 transitions. Word has length 14 [2022-11-16 11:07:25,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:25,466 INFO L495 AbstractCegarLoop]: Abstraction has 742 states and 2009 transitions. [2022-11-16 11:07:25,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:25,466 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2009 transitions. [2022-11-16 11:07:25,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:07:25,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:25,466 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:07:25,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (96)] Forceful destruction successful, exit code 0 [2022-11-16 11:07:25,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:25,667 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:07:25,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:25,667 INFO L85 PathProgramCache]: Analyzing trace with hash -231767064, now seen corresponding path program 2 times [2022-11-16 11:07:25,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:07:25,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1605116867] [2022-11-16 11:07:25,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:07:25,668 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:25,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:07:25,669 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:07:25,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (97)] Waiting until timeout for monitored process [2022-11-16 11:07:26,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:07:26,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:07:26,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:07:26,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:07:26,196 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:07:26,196 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:07:26,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:07:26,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:07:26,381 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:07:26,381 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:07:26,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:07:26,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:07:26,679 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:07:26,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1605116867] [2022-11-16 11:07:26,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1605116867] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:07:26,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:07:26,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:07:26,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264829589] [2022-11-16 11:07:26,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:07:26,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:07:26,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:07:26,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:07:26,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:07:26,681 INFO L87 Difference]: Start difference. First operand 742 states and 2009 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:27,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:27,020 INFO L93 Difference]: Finished difference Result 755 states and 2034 transitions. [2022-11-16 11:07:27,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:07:27,021 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2022-11-16 11:07:27,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:27,024 INFO L225 Difference]: With dead ends: 755 [2022-11-16 11:07:27,024 INFO L226 Difference]: Without dead ends: 755 [2022-11-16 11:07:27,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:07:27,024 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:27,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 44 Unchecked, 0.3s Time] [2022-11-16 11:07:27,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2022-11-16 11:07:27,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 742. [2022-11-16 11:07:27,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 714 states have (on average 2.8137254901960786) internal successors, (2009), 741 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:27,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2009 transitions. [2022-11-16 11:07:27,038 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2009 transitions. Word has length 14 [2022-11-16 11:07:27,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:27,038 INFO L495 AbstractCegarLoop]: Abstraction has 742 states and 2009 transitions. [2022-11-16 11:07:27,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:27,039 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2009 transitions. [2022-11-16 11:07:27,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:07:27,039 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:27,039 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:07:27,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (97)] Forceful destruction successful, exit code 0 [2022-11-16 11:07:27,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:27,240 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:07:27,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:27,240 INFO L85 PathProgramCache]: Analyzing trace with hash -231596967, now seen corresponding path program 2 times [2022-11-16 11:07:27,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:07:27,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1039121598] [2022-11-16 11:07:27,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:07:27,241 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:27,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:07:27,242 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:07:27,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (98)] Waiting until timeout for monitored process [2022-11-16 11:07:27,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:07:27,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:07:27,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:07:27,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:07:27,756 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:07:27,756 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:07:27,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:07:27,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:07:27,935 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:07:27,935 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:07:28,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:07:28,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:07:28,353 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:07:28,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1039121598] [2022-11-16 11:07:28,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1039121598] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:07:28,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:07:28,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:07:28,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799959176] [2022-11-16 11:07:28,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:07:28,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:07:28,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:07:28,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:07:28,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:07:28,355 INFO L87 Difference]: Start difference. First operand 742 states and 2009 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:28,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:28,733 INFO L93 Difference]: Finished difference Result 754 states and 2035 transitions. [2022-11-16 11:07:28,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:07:28,733 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2022-11-16 11:07:28,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:28,735 INFO L225 Difference]: With dead ends: 754 [2022-11-16 11:07:28,735 INFO L226 Difference]: Without dead ends: 754 [2022-11-16 11:07:28,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:07:28,736 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:28,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 65 Unchecked, 0.4s Time] [2022-11-16 11:07:28,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-11-16 11:07:28,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 742. [2022-11-16 11:07:28,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 714 states have (on average 2.8137254901960786) internal successors, (2009), 741 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:28,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2009 transitions. [2022-11-16 11:07:28,747 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2009 transitions. Word has length 14 [2022-11-16 11:07:28,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:28,748 INFO L495 AbstractCegarLoop]: Abstraction has 742 states and 2009 transitions. [2022-11-16 11:07:28,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:28,748 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2009 transitions. [2022-11-16 11:07:28,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:07:28,748 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:28,748 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:07:28,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (98)] Ended with exit code 0 [2022-11-16 11:07:28,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:28,949 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:07:28,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:28,949 INFO L85 PathProgramCache]: Analyzing trace with hash -229691304, now seen corresponding path program 3 times [2022-11-16 11:07:28,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:07:28,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1068681364] [2022-11-16 11:07:28,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:07:28,950 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:28,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:07:28,951 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:07:28,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (99)] Waiting until timeout for monitored process [2022-11-16 11:07:29,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 11:07:29,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:07:29,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:07:29,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:07:29,525 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:07:29,525 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:07:29,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:07:29,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:07:29,696 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:07:29,696 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:07:29,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:07:29,980 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:07:29,981 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:07:29,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1068681364] [2022-11-16 11:07:29,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1068681364] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:07:29,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:07:29,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:07:29,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490848883] [2022-11-16 11:07:29,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:07:29,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:07:29,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:07:29,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:07:29,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:07:29,982 INFO L87 Difference]: Start difference. First operand 742 states and 2009 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:30,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:30,338 INFO L93 Difference]: Finished difference Result 751 states and 2023 transitions. [2022-11-16 11:07:30,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:07:30,339 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2022-11-16 11:07:30,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:30,341 INFO L225 Difference]: With dead ends: 751 [2022-11-16 11:07:30,341 INFO L226 Difference]: Without dead ends: 751 [2022-11-16 11:07:30,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:07:30,342 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:30,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 96 Unchecked, 0.4s Time] [2022-11-16 11:07:30,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-11-16 11:07:30,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 736. [2022-11-16 11:07:30,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 708 states have (on average 2.8192090395480225) internal successors, (1996), 735 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:30,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1996 transitions. [2022-11-16 11:07:30,366 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1996 transitions. Word has length 14 [2022-11-16 11:07:30,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:30,366 INFO L495 AbstractCegarLoop]: Abstraction has 736 states and 1996 transitions. [2022-11-16 11:07:30,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:30,367 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1996 transitions. [2022-11-16 11:07:30,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:07:30,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:30,367 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:07:30,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (99)] Ended with exit code 0 [2022-11-16 11:07:30,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:30,568 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:07:30,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:30,568 INFO L85 PathProgramCache]: Analyzing trace with hash -224418297, now seen corresponding path program 3 times [2022-11-16 11:07:30,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:07:30,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [663507944] [2022-11-16 11:07:30,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:07:30,569 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:30,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:07:30,570 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:07:30,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2022-11-16 11:07:30,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 11:07:30,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:07:30,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:07:30,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:07:31,123 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:07:31,123 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:07:31,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:07:31,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:07:31,285 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:07:31,285 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:07:31,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:07:31,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:07:31,565 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:07:31,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [663507944] [2022-11-16 11:07:31,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [663507944] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:07:31,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:07:31,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:07:31,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753307377] [2022-11-16 11:07:31,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:07:31,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:07:31,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:07:31,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:07:31,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:07:31,567 INFO L87 Difference]: Start difference. First operand 736 states and 1996 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:31,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:31,929 INFO L93 Difference]: Finished difference Result 742 states and 2006 transitions. [2022-11-16 11:07:31,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:07:31,929 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2022-11-16 11:07:31,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:31,931 INFO L225 Difference]: With dead ends: 742 [2022-11-16 11:07:31,931 INFO L226 Difference]: Without dead ends: 742 [2022-11-16 11:07:31,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:07:31,932 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:31,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 43 Unchecked, 0.4s Time] [2022-11-16 11:07:31,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2022-11-16 11:07:31,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 727. [2022-11-16 11:07:31,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 699 states have (on average 2.828326180257511) internal successors, (1977), 726 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:31,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 1977 transitions. [2022-11-16 11:07:31,943 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 1977 transitions. Word has length 14 [2022-11-16 11:07:31,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:31,943 INFO L495 AbstractCegarLoop]: Abstraction has 727 states and 1977 transitions. [2022-11-16 11:07:31,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:31,943 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 1977 transitions. [2022-11-16 11:07:31,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:07:31,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:31,944 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:07:31,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (100)] Forceful destruction successful, exit code 0 [2022-11-16 11:07:32,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:32,148 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:07:32,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:32,149 INFO L85 PathProgramCache]: Analyzing trace with hash -61724488, now seen corresponding path program 1 times [2022-11-16 11:07:32,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:07:32,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1573636502] [2022-11-16 11:07:32,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:32,149 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:32,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:07:32,150 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:07:32,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (101)] Waiting until timeout for monitored process [2022-11-16 11:07:32,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:32,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:07:32,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:07:32,846 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:07:32,846 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:07:32,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:07:32,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:07:33,015 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:07:33,016 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:07:33,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:07:33,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:07:33,366 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:07:33,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1573636502] [2022-11-16 11:07:33,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1573636502] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:07:33,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:07:33,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:07:33,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754095808] [2022-11-16 11:07:33,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:07:33,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:07:33,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:07:33,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:07:33,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:07:33,368 INFO L87 Difference]: Start difference. First operand 727 states and 1977 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:33,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:33,682 INFO L93 Difference]: Finished difference Result 741 states and 2006 transitions. [2022-11-16 11:07:33,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:07:33,683 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2022-11-16 11:07:33,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:33,685 INFO L225 Difference]: With dead ends: 741 [2022-11-16 11:07:33,685 INFO L226 Difference]: Without dead ends: 741 [2022-11-16 11:07:33,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:07:33,685 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:33,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 63 Unchecked, 0.3s Time] [2022-11-16 11:07:33,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-11-16 11:07:33,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 741. [2022-11-16 11:07:33,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 713 states have (on average 2.8134642356241235) internal successors, (2006), 740 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:33,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 2006 transitions. [2022-11-16 11:07:33,696 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 2006 transitions. Word has length 14 [2022-11-16 11:07:33,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:33,697 INFO L495 AbstractCegarLoop]: Abstraction has 741 states and 2006 transitions. [2022-11-16 11:07:33,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:33,697 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 2006 transitions. [2022-11-16 11:07:33,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:07:33,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:33,698 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:07:33,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (101)] Forceful destruction successful, exit code 0 [2022-11-16 11:07:33,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:33,898 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:07:33,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:33,899 INFO L85 PathProgramCache]: Analyzing trace with hash 239672233, now seen corresponding path program 1 times [2022-11-16 11:07:33,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:07:33,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1665146054] [2022-11-16 11:07:33,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:33,899 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:33,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:07:33,900 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:07:33,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (102)] Waiting until timeout for monitored process [2022-11-16 11:07:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:34,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:07:34,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:07:34,598 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:07:34,599 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:07:34,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:07:34,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:07:34,767 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:07:34,767 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:07:35,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:07:35,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:07:35,065 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:07:35,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1665146054] [2022-11-16 11:07:35,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1665146054] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:07:35,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:07:35,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:07:35,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132274364] [2022-11-16 11:07:35,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:07:35,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:07:35,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:07:35,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:07:35,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:07:35,066 INFO L87 Difference]: Start difference. First operand 741 states and 2006 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:35,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:35,408 INFO L93 Difference]: Finished difference Result 766 states and 2053 transitions. [2022-11-16 11:07:35,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:07:35,409 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2022-11-16 11:07:35,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:35,410 INFO L225 Difference]: With dead ends: 766 [2022-11-16 11:07:35,410 INFO L226 Difference]: Without dead ends: 766 [2022-11-16 11:07:35,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:07:35,411 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:35,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 43 Unchecked, 0.3s Time] [2022-11-16 11:07:35,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2022-11-16 11:07:35,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 752. [2022-11-16 11:07:35,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 724 states have (on average 2.8011049723756907) internal successors, (2028), 751 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:35,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2028 transitions. [2022-11-16 11:07:35,422 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2028 transitions. Word has length 14 [2022-11-16 11:07:35,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:35,422 INFO L495 AbstractCegarLoop]: Abstraction has 752 states and 2028 transitions. [2022-11-16 11:07:35,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:35,422 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2028 transitions. [2022-11-16 11:07:35,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:07:35,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:35,423 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:07:35,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (102)] Forceful destruction successful, exit code 0 [2022-11-16 11:07:35,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:35,623 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:07:35,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:35,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1331568812, now seen corresponding path program 1 times [2022-11-16 11:07:35,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:07:35,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1347815078] [2022-11-16 11:07:35,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:35,624 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:35,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:07:35,625 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:07:35,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (103)] Waiting until timeout for monitored process [2022-11-16 11:07:36,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:36,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:07:36,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:07:36,356 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:07:36,357 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:07:36,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:07:36,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:07:36,532 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:07:36,532 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:07:36,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:07:36,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:07:36,889 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:07:36,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1347815078] [2022-11-16 11:07:36,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1347815078] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:07:36,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:07:36,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:07:36,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339423320] [2022-11-16 11:07:36,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:07:36,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:07:36,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:07:36,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:07:36,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:07:36,891 INFO L87 Difference]: Start difference. First operand 752 states and 2028 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:37,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:37,141 INFO L93 Difference]: Finished difference Result 752 states and 2026 transitions. [2022-11-16 11:07:37,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:07:37,142 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-11-16 11:07:37,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:37,143 INFO L225 Difference]: With dead ends: 752 [2022-11-16 11:07:37,143 INFO L226 Difference]: Without dead ends: 752 [2022-11-16 11:07:37,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:07:37,144 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:37,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2022-11-16 11:07:37,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-11-16 11:07:37,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 738. [2022-11-16 11:07:37,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 710 states have (on average 2.812676056338028) internal successors, (1997), 737 states have internal predecessors, (1997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:37,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1997 transitions. [2022-11-16 11:07:37,155 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1997 transitions. Word has length 15 [2022-11-16 11:07:37,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:37,155 INFO L495 AbstractCegarLoop]: Abstraction has 738 states and 1997 transitions. [2022-11-16 11:07:37,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:37,156 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1997 transitions. [2022-11-16 11:07:37,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:07:37,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:37,156 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:07:37,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (103)] Forceful destruction successful, exit code 0 [2022-11-16 11:07:37,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:37,358 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:07:37,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:37,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1410426763, now seen corresponding path program 1 times [2022-11-16 11:07:37,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:07:37,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1640769270] [2022-11-16 11:07:37,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:37,359 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:37,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:07:37,360 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:07:37,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (104)] Waiting until timeout for monitored process [2022-11-16 11:07:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:38,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:07:38,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:07:38,176 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:07:38,177 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:07:38,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:07:38,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:07:38,357 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:07:38,357 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:07:38,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:07:38,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:07:38,677 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:07:38,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1640769270] [2022-11-16 11:07:38,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1640769270] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:07:38,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:07:38,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:07:38,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84397971] [2022-11-16 11:07:38,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:07:38,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:07:38,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:07:38,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:07:38,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:07:38,678 INFO L87 Difference]: Start difference. First operand 738 states and 1997 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:39,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:39,025 INFO L93 Difference]: Finished difference Result 738 states and 1995 transitions. [2022-11-16 11:07:39,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:07:39,026 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-11-16 11:07:39,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:39,028 INFO L225 Difference]: With dead ends: 738 [2022-11-16 11:07:39,028 INFO L226 Difference]: Without dead ends: 738 [2022-11-16 11:07:39,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:07:39,028 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:39,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 43 Unchecked, 0.3s Time] [2022-11-16 11:07:39,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2022-11-16 11:07:39,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 727. [2022-11-16 11:07:39,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 699 states have (on average 2.8226037195994276) internal successors, (1973), 726 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:39,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 1973 transitions. [2022-11-16 11:07:39,040 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 1973 transitions. Word has length 15 [2022-11-16 11:07:39,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:39,040 INFO L495 AbstractCegarLoop]: Abstraction has 727 states and 1973 transitions. [2022-11-16 11:07:39,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:39,040 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 1973 transitions. [2022-11-16 11:07:39,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:07:39,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:39,041 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:07:39,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (104)] Ended with exit code 0 [2022-11-16 11:07:39,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:39,242 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:07:39,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:39,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1913458748, now seen corresponding path program 1 times [2022-11-16 11:07:39,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:07:39,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2111429974] [2022-11-16 11:07:39,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:39,243 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:39,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:07:39,244 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:07:39,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (105)] Waiting until timeout for monitored process [2022-11-16 11:07:39,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:39,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:07:39,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:07:40,031 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:07:40,031 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:07:40,097 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:07:40,097 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:07:40,179 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:07:40,180 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 31 [2022-11-16 11:07:40,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:07:40,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:07:40,506 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:07:40,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2111429974] [2022-11-16 11:07:40,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2111429974] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:07:40,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:07:40,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:07:40,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145427885] [2022-11-16 11:07:40,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:07:40,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:07:40,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:07:40,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:07:40,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:07:40,508 INFO L87 Difference]: Start difference. First operand 727 states and 1973 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:40,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:40,924 INFO L93 Difference]: Finished difference Result 743 states and 2004 transitions. [2022-11-16 11:07:40,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:07:40,924 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-11-16 11:07:40,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:40,926 INFO L225 Difference]: With dead ends: 743 [2022-11-16 11:07:40,926 INFO L226 Difference]: Without dead ends: 743 [2022-11-16 11:07:40,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:07:40,927 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:40,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 75 Unchecked, 0.4s Time] [2022-11-16 11:07:40,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2022-11-16 11:07:40,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 743. [2022-11-16 11:07:40,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 715 states have (on average 2.802797202797203) internal successors, (2004), 742 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:40,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2004 transitions. [2022-11-16 11:07:40,937 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2004 transitions. Word has length 15 [2022-11-16 11:07:40,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:40,938 INFO L495 AbstractCegarLoop]: Abstraction has 743 states and 2004 transitions. [2022-11-16 11:07:40,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:40,938 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2004 transitions. [2022-11-16 11:07:40,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:07:40,938 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:40,939 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:07:40,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (105)] Forceful destruction successful, exit code 0 [2022-11-16 11:07:41,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:41,139 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:07:41,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:41,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1913459678, now seen corresponding path program 1 times [2022-11-16 11:07:41,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:07:41,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [74348870] [2022-11-16 11:07:41,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:41,140 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:41,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:07:41,141 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:07:41,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (106)] Waiting until timeout for monitored process [2022-11-16 11:07:41,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:41,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:07:41,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:07:41,936 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:07:41,936 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:07:42,001 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:07:42,002 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:07:42,079 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:07:42,079 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 31 [2022-11-16 11:07:42,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:07:42,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:07:42,428 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:07:42,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [74348870] [2022-11-16 11:07:42,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [74348870] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:07:42,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:07:42,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:07:42,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60496611] [2022-11-16 11:07:42,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:07:42,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:07:42,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:07:42,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:07:42,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:07:42,430 INFO L87 Difference]: Start difference. First operand 743 states and 2004 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:42,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:42,822 INFO L93 Difference]: Finished difference Result 751 states and 2024 transitions. [2022-11-16 11:07:42,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:07:42,822 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-11-16 11:07:42,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:42,824 INFO L225 Difference]: With dead ends: 751 [2022-11-16 11:07:42,824 INFO L226 Difference]: Without dead ends: 751 [2022-11-16 11:07:42,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:07:42,825 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:42,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 0 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 78 Unchecked, 0.4s Time] [2022-11-16 11:07:42,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-11-16 11:07:42,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 747. [2022-11-16 11:07:42,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 719 states have (on average 2.8052851182197496) internal successors, (2017), 746 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:42,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 2017 transitions. [2022-11-16 11:07:42,835 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 2017 transitions. Word has length 15 [2022-11-16 11:07:42,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:42,836 INFO L495 AbstractCegarLoop]: Abstraction has 747 states and 2017 transitions. [2022-11-16 11:07:42,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:42,836 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 2017 transitions. [2022-11-16 11:07:42,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:07:42,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:42,836 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:07:42,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (106)] Forceful destruction successful, exit code 0 [2022-11-16 11:07:43,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:43,037 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:07:43,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:43,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1160094989, now seen corresponding path program 1 times [2022-11-16 11:07:43,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:07:43,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1446460552] [2022-11-16 11:07:43,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:43,038 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:43,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:07:43,039 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:07:43,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (107)] Waiting until timeout for monitored process [2022-11-16 11:07:43,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:43,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:07:43,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:07:43,863 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:07:43,863 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 11:07:43,941 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:07:43,941 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-16 11:07:44,027 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:07:44,027 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 31 [2022-11-16 11:07:44,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:07:44,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:07:44,432 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:07:44,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1446460552] [2022-11-16 11:07:44,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1446460552] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:07:44,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:07:44,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:07:44,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473389396] [2022-11-16 11:07:44,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:07:44,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:07:44,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:07:44,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:07:44,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:07:44,433 INFO L87 Difference]: Start difference. First operand 747 states and 2017 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:44,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:44,761 INFO L93 Difference]: Finished difference Result 728 states and 1969 transitions. [2022-11-16 11:07:44,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:07:44,762 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-11-16 11:07:44,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:44,768 INFO L225 Difference]: With dead ends: 728 [2022-11-16 11:07:44,768 INFO L226 Difference]: Without dead ends: 728 [2022-11-16 11:07:44,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:07:44,769 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 35 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:44,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 0 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:07:44,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-11-16 11:07:44,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 675. [2022-11-16 11:07:44,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 654 states have (on average 2.834862385321101) internal successors, (1854), 674 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:44,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1854 transitions. [2022-11-16 11:07:44,784 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1854 transitions. Word has length 15 [2022-11-16 11:07:44,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:44,784 INFO L495 AbstractCegarLoop]: Abstraction has 675 states and 1854 transitions. [2022-11-16 11:07:44,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:44,784 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1854 transitions. [2022-11-16 11:07:44,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:07:44,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:44,785 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:07:44,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (107)] Forceful destruction successful, exit code 0 [2022-11-16 11:07:44,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:44,986 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:07:44,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:44,986 INFO L85 PathProgramCache]: Analyzing trace with hash 8305838, now seen corresponding path program 2 times [2022-11-16 11:07:44,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:07:44,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1092323308] [2022-11-16 11:07:44,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:07:44,987 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:44,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:07:44,988 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:07:44,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (108)] Waiting until timeout for monitored process [2022-11-16 11:07:45,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:07:45,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:07:45,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:07:45,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:07:45,497 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-16 11:07:45,506 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 11:07:45,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:07:45,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:07:45,610 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:07:45,611 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-16 11:07:45,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:07:45,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:07:45,748 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:07:45,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1092323308] [2022-11-16 11:07:45,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1092323308] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:07:45,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:07:45,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:07:45,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219169933] [2022-11-16 11:07:45,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:07:45,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:07:45,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:07:45,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:07:45,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:07:45,750 INFO L87 Difference]: Start difference. First operand 675 states and 1854 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:46,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:46,270 INFO L93 Difference]: Finished difference Result 565 states and 1522 transitions. [2022-11-16 11:07:46,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:07:46,271 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 15 [2022-11-16 11:07:46,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:46,273 INFO L225 Difference]: With dead ends: 565 [2022-11-16 11:07:46,273 INFO L226 Difference]: Without dead ends: 565 [2022-11-16 11:07:46,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:07:46,273 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 21 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:46,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 0 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:07:46,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-11-16 11:07:46,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 310. [2022-11-16 11:07:46,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 302 states have (on average 2.622516556291391) internal successors, (792), 309 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:46,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 792 transitions. [2022-11-16 11:07:46,279 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 792 transitions. Word has length 15 [2022-11-16 11:07:46,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:46,279 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 792 transitions. [2022-11-16 11:07:46,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:46,280 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 792 transitions. [2022-11-16 11:07:46,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:07:46,280 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:46,280 INFO L195 NwaCegarLoop]: trace histogram [12, 1, 1, 1] [2022-11-16 11:07:46,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (108)] Forceful destruction successful, exit code 0 [2022-11-16 11:07:46,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:46,481 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:07:46,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:46,481 INFO L85 PathProgramCache]: Analyzing trace with hash -463587357, now seen corresponding path program 1 times [2022-11-16 11:07:46,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:07:46,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1850785874] [2022-11-16 11:07:46,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:46,482 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:07:46,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:07:46,483 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:07:46,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (109)] Waiting until timeout for monitored process [2022-11-16 11:07:46,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:46,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:07:46,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:07:46,942 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 11:07:47,940 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:07:47,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:07:54,174 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:07:54,174 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:07:54,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1850785874] [2022-11-16 11:07:54,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1850785874] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:07:54,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:07:54,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2022-11-16 11:07:54,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941126454] [2022-11-16 11:07:54,175 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:07:54,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 11:07:54,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:07:54,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 11:07:54,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2022-11-16 11:07:54,176 INFO L87 Difference]: Start difference. First operand 310 states and 792 transitions. Second operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:07,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:08:09,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:08:11,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:08:13,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:08:15,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:08:17,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:08:19,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:08:21,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:08:23,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:08:25,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:08:27,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:08:29,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:08:38,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:08:40,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:08:42,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:08:44,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:08:46,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:08:48,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:08:50,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:08:52,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:08:54,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:08:56,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:08:58,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:09:00,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:09:41,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:09:41,490 INFO L93 Difference]: Finished difference Result 3460 states and 9766 transitions. [2022-11-16 11:09:41,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 11:09:41,492 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 11:09:41,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:09:41,501 INFO L225 Difference]: With dead ends: 3460 [2022-11-16 11:09:41,501 INFO L226 Difference]: Without dead ends: 3460 [2022-11-16 11:09:41,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 41.7s TimeCoverageRelationStatistics Valid=558, Invalid=1002, Unknown=0, NotChecked=0, Total=1560 [2022-11-16 11:09:41,502 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2833 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5660 mSolverCounterSat, 436 mSolverCounterUnsat, 24 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 68.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2833 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 6120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 436 IncrementalHoareTripleChecker+Valid, 5660 IncrementalHoareTripleChecker+Invalid, 24 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 71.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:09:41,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2833 Valid, 0 Invalid, 6120 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [436 Valid, 5660 Invalid, 24 Unknown, 0 Unchecked, 71.4s Time] [2022-11-16 11:09:41,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3460 states. [2022-11-16 11:09:41,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3460 to 338. [2022-11-16 11:09:41,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 330 states have (on average 2.56969696969697) internal successors, (848), 337 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:09:41,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 848 transitions. [2022-11-16 11:09:41,528 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 848 transitions. Word has length 15 [2022-11-16 11:09:41,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:09:41,529 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 848 transitions. [2022-11-16 11:09:41,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:09:41,529 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 848 transitions. [2022-11-16 11:09:41,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:09:41,529 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:09:41,529 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:09:41,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (109)] Ended with exit code 0 [2022-11-16 11:09:41,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:09:41,730 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:09:41,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:09:41,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1042626254, now seen corresponding path program 1 times [2022-11-16 11:09:41,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:09:41,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [575071267] [2022-11-16 11:09:41,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:09:41,731 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:09:41,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:09:41,732 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:09:41,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (110)] Waiting until timeout for monitored process [2022-11-16 11:09:42,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:42,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:09:42,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:09:42,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:09:42,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:09:42,590 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:09:42,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [575071267] [2022-11-16 11:09:42,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [575071267] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:09:42,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:09:42,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:09:42,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367486299] [2022-11-16 11:09:42,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:09:42,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:09:42,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:09:42,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:09:42,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:09:42,591 INFO L87 Difference]: Start difference. First operand 338 states and 848 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:09:43,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:09:43,425 INFO L93 Difference]: Finished difference Result 471 states and 1161 transitions. [2022-11-16 11:09:43,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:09:43,426 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2022-11-16 11:09:43,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:09:43,427 INFO L225 Difference]: With dead ends: 471 [2022-11-16 11:09:43,427 INFO L226 Difference]: Without dead ends: 338 [2022-11-16 11:09:43,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:09:43,428 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:09:43,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 0 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:09:43,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-11-16 11:09:43,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 338. [2022-11-16 11:09:43,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 330 states have (on average 2.566666666666667) internal successors, (847), 337 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:09:43,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 847 transitions. [2022-11-16 11:09:43,434 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 847 transitions. Word has length 18 [2022-11-16 11:09:43,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:09:43,434 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 847 transitions. [2022-11-16 11:09:43,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:09:43,434 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 847 transitions. [2022-11-16 11:09:43,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 11:09:43,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:09:43,435 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:09:43,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (110)] Forceful destruction successful, exit code 0 [2022-11-16 11:09:43,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:09:43,635 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:09:43,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:09:43,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1031907110, now seen corresponding path program 1 times [2022-11-16 11:09:43,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:09:43,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [342290170] [2022-11-16 11:09:43,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:09:43,636 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:09:43,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:09:43,638 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:09:43,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (111)] Waiting until timeout for monitored process [2022-11-16 11:09:44,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:44,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:09:44,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:09:44,362 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 11:09:44,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:09:44,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:09:46,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:09:46,445 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:09:46,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [342290170] [2022-11-16 11:09:46,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [342290170] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:09:46,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:09:46,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-16 11:09:46,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534562471] [2022-11-16 11:09:46,446 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:09:46,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:09:46,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:09:46,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:09:46,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:09:46,447 INFO L87 Difference]: Start difference. First operand 338 states and 847 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:09:48,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:09:48,164 INFO L93 Difference]: Finished difference Result 684 states and 1807 transitions. [2022-11-16 11:09:48,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:09:48,165 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 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 19 [2022-11-16 11:09:48,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:09:48,167 INFO L225 Difference]: With dead ends: 684 [2022-11-16 11:09:48,167 INFO L226 Difference]: Without dead ends: 684 [2022-11-16 11:09:48,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:09:48,168 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 72 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:09:48,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 0 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 131 Invalid, 0 Unknown, 180 Unchecked, 1.0s Time] [2022-11-16 11:09:48,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-11-16 11:09:48,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 574. [2022-11-16 11:09:48,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 566 states have (on average 2.715547703180212) internal successors, (1537), 573 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:09:48,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 1537 transitions. [2022-11-16 11:09:48,179 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 1537 transitions. Word has length 19 [2022-11-16 11:09:48,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:09:48,180 INFO L495 AbstractCegarLoop]: Abstraction has 574 states and 1537 transitions. [2022-11-16 11:09:48,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:09:48,180 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 1537 transitions. [2022-11-16 11:09:48,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 11:09:48,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:09:48,181 INFO L195 NwaCegarLoop]: trace histogram [16, 1, 1, 1, 1] [2022-11-16 11:09:48,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (111)] Forceful destruction successful, exit code 0 [2022-11-16 11:09:48,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:09:48,382 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:09:48,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:09:48,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1459518961, now seen corresponding path program 2 times [2022-11-16 11:09:48,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:09:48,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [563890198] [2022-11-16 11:09:48,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:09:48,383 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:09:48,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:09:48,387 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:09:48,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (112)] Waiting until timeout for monitored process [2022-11-16 11:09:48,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:09:48,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:09:49,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 11:09:49,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:09:49,015 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 11:09:50,583 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:09:50,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:10:01,774 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:10:01,774 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:10:01,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [563890198] [2022-11-16 11:10:01,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [563890198] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:10:01,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:10:01,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2022-11-16 11:10:01,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971466791] [2022-11-16 11:10:01,775 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:10:01,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-16 11:10:01,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:10:01,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-16 11:10:01,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 11:10:01,776 INFO L87 Difference]: Start difference. First operand 574 states and 1537 transitions. Second operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:28,480 WARN L233 SmtUtils]: Spent 14.48s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:10:31,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:10:33,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:10:35,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:10:37,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:10:39,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:10:41,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:10:43,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:10:45,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:10:47,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:10:49,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:10:51,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:10:53,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:10:55,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:10:57,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:10:59,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:11:01,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:11:06,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:11:08,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:11:10,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:11:12,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:11:14,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:11:16,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:11:18,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:11:20,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:11:22,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:11:24,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:11:26,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:11:28,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:11:30,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:11:32,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:11:34,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:11:36,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:11:44,684 WARN L233 SmtUtils]: Spent 5.18s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:11:53,745 WARN L233 SmtUtils]: Spent 6.16s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:13:20,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:13:20,293 INFO L93 Difference]: Finished difference Result 7428 states and 21016 transitions. [2022-11-16 11:13:20,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-16 11:13:20,295 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 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 [2022-11-16 11:13:20,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:13:20,318 INFO L225 Difference]: With dead ends: 7428 [2022-11-16 11:13:20,318 INFO L226 Difference]: Without dead ends: 7428 [2022-11-16 11:13:20,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 83.2s TimeCoverageRelationStatistics Valid=934, Invalid=1718, Unknown=0, NotChecked=0, Total=2652 [2022-11-16 11:13:20,319 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 8304 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9027 mSolverCounterSat, 810 mSolverCounterUnsat, 32 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 119.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8304 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 9869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 810 IncrementalHoareTripleChecker+Valid, 9027 IncrementalHoareTripleChecker+Invalid, 32 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 126.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:13:20,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8304 Valid, 0 Invalid, 9869 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [810 Valid, 9027 Invalid, 32 Unknown, 0 Unchecked, 126.1s Time] [2022-11-16 11:13:20,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7428 states. [2022-11-16 11:13:20,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7428 to 610. [2022-11-16 11:13:20,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 602 states have (on average 2.642857142857143) internal successors, (1591), 609 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:20,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 1591 transitions. [2022-11-16 11:13:20,401 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 1591 transitions. Word has length 20 [2022-11-16 11:13:20,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:13:20,402 INFO L495 AbstractCegarLoop]: Abstraction has 610 states and 1591 transitions. [2022-11-16 11:13:20,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:20,403 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 1591 transitions. [2022-11-16 11:13:20,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 11:13:20,404 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:13:20,404 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:13:20,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (112)] Ended with exit code 0 [2022-11-16 11:13:20,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:13:20,618 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:13:20,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:20,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1679669414, now seen corresponding path program 2 times [2022-11-16 11:13:20,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:13:20,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [712916556] [2022-11-16 11:13:20,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:13:20,620 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:13:20,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:13:20,621 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:13:20,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (113)] Waiting until timeout for monitored process [2022-11-16 11:13:21,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:13:21,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:13:21,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:13:21,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:13:21,234 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 11:13:21,551 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 11:13:21,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:13:21,552 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:13:21,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [712916556] [2022-11-16 11:13:21,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [712916556] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:13:21,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:13:21,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:13:21,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396945278] [2022-11-16 11:13:21,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:13:21,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:13:21,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:13:21,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:13:21,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:13:21,554 INFO L87 Difference]: Start difference. First operand 610 states and 1591 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:22,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:13:22,149 INFO L93 Difference]: Finished difference Result 560 states and 1422 transitions. [2022-11-16 11:13:22,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:13:22,151 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 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 21 [2022-11-16 11:13:22,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:13:22,153 INFO L225 Difference]: With dead ends: 560 [2022-11-16 11:13:22,153 INFO L226 Difference]: Without dead ends: 560 [2022-11-16 11:13:22,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:13:22,153 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 37 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:13:22,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 0 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:13:22,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-11-16 11:13:22,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 324. [2022-11-16 11:13:22,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 320 states have (on average 2.30625) internal successors, (738), 323 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:22,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 738 transitions. [2022-11-16 11:13:22,163 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 738 transitions. Word has length 21 [2022-11-16 11:13:22,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:13:22,164 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 738 transitions. [2022-11-16 11:13:22,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:22,164 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 738 transitions. [2022-11-16 11:13:22,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-16 11:13:22,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:13:22,166 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1] [2022-11-16 11:13:22,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (113)] Forceful destruction successful, exit code 0 [2022-11-16 11:13:22,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:13:22,385 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-16 11:13:22,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:22,385 INFO L85 PathProgramCache]: Analyzing trace with hash 98229587, now seen corresponding path program 4 times [2022-11-16 11:13:22,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:13:22,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [113650466] [2022-11-16 11:13:22,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:13:22,386 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:13:22,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:13:22,387 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:13:22,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470a061a-9051-4812-9211-8a61b4acb209/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (114)] Waiting until timeout for monitored process [2022-11-16 11:13:22,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:13:22,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:13:22,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-16 11:13:22,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:13:23,232 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:13:23,232 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:13:26,108 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:26,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:13:48,233 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:48,233 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:13:48,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [113650466] [2022-11-16 11:13:48,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [113650466] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:13:48,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:13:48,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2022-11-16 11:13:48,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920210903] [2022-11-16 11:13:48,234 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:13:48,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-16 11:13:48,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:13:48,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-16 11:13:48,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1634, Unknown=0, NotChecked=0, Total=2256 [2022-11-16 11:13:48,236 INFO L87 Difference]: Start difference. First operand 324 states and 738 transitions. Second operand has 48 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 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)