./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a --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 0d8799100fd609ab67add98408724f155026fd97a78e0a4112bb89c435f95463 --- 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-b5237d8 [2022-11-21 16:33:01,083 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:33:01,085 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:33:01,106 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:33:01,107 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:33:01,108 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:33:01,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:33:01,111 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:33:01,113 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:33:01,114 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:33:01,115 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:33:01,116 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:33:01,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:33:01,118 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:33:01,119 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:33:01,120 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:33:01,121 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:33:01,122 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:33:01,124 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:33:01,126 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:33:01,128 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:33:01,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:33:01,130 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:33:01,131 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:33:01,135 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:33:01,135 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:33:01,136 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:33:01,137 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:33:01,137 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:33:01,138 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:33:01,139 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:33:01,140 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:33:01,141 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:33:01,142 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:33:01,143 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:33:01,143 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:33:01,144 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:33:01,144 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:33:01,145 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:33:01,146 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:33:01,147 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:33:01,156 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-21 16:33:01,187 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:33:01,188 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:33:01,188 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:33:01,188 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:33:01,189 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:33:01,189 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:33:01,190 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:33:01,190 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:33:01,190 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:33:01,191 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:33:01,191 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:33:01,191 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-21 16:33:01,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:33:01,191 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:33:01,191 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:33:01,192 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-21 16:33:01,192 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-21 16:33:01,192 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-21 16:33:01,192 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:33:01,192 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-21 16:33:01,193 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:33:01,193 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:33:01,193 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:33:01,193 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:33:01,193 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:33:01,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:33:01,194 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:33:01,194 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:33:01,197 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:33:01,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:33:01,198 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_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d8799100fd609ab67add98408724f155026fd97a78e0a4112bb89c435f95463 [2022-11-21 16:33:01,497 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:33:01,534 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:33:01,537 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:33:01,538 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:33:01,539 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:33:01,539 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c [2022-11-21 16:33:04,701 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:33:04,918 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:33:04,919 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c [2022-11-21 16:33:04,929 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/data/96704d69a/91ceb36dba594031adc93d99da2751c5/FLAG75fe94510 [2022-11-21 16:33:04,947 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/data/96704d69a/91ceb36dba594031adc93d99da2751c5 [2022-11-21 16:33:04,952 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:33:04,954 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:33:04,959 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:33:04,959 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:33:04,963 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:33:04,964 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:33:04" (1/1) ... [2022-11-21 16:33:04,965 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65dfac89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:04, skipping insertion in model container [2022-11-21 16:33:04,965 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:33:04" (1/1) ... [2022-11-21 16:33:04,972 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:33:05,001 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:33:05,164 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c[2486,2499] [2022-11-21 16:33:05,174 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:33:05,185 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) [2022-11-21 16:33:05,186 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@300f26c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:05, skipping insertion in model container [2022-11-21 16:33:05,186 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:33:05,186 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-21 16:33:05,188 INFO L158 Benchmark]: Toolchain (without parser) took 233.62ms. Allocated memory is still 184.5MB. Free memory was 143.5MB in the beginning and 134.0MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-21 16:33:05,189 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 113.2MB. Free memory was 64.0MB in the beginning and 63.9MB in the end (delta: 84.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-21 16:33:05,189 INFO L158 Benchmark]: CACSL2BoogieTranslator took 227.34ms. Allocated memory is still 184.5MB. Free memory was 143.5MB in the beginning and 134.0MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-21 16:33:05,191 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 113.2MB. Free memory was 64.0MB in the beginning and 63.9MB in the end (delta: 84.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 227.34ms. Allocated memory is still 184.5MB. Free memory was 143.5MB in the beginning and 134.0MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 107]: 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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a --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 0d8799100fd609ab67add98408724f155026fd97a78e0a4112bb89c435f95463 --- 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-b5237d8 [2022-11-21 16:33:07,537 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:33:07,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:33:07,592 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:33:07,593 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:33:07,597 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:33:07,600 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:33:07,604 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:33:07,606 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:33:07,612 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:33:07,613 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:33:07,616 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:33:07,617 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:33:07,619 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:33:07,621 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:33:07,622 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:33:07,623 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:33:07,624 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:33:07,625 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:33:07,627 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:33:07,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:33:07,633 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:33:07,634 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:33:07,635 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:33:07,648 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:33:07,650 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:33:07,650 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:33:07,652 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:33:07,653 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:33:07,654 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:33:07,654 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:33:07,655 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:33:07,657 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:33:07,658 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:33:07,659 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:33:07,660 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:33:07,660 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:33:07,661 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:33:07,661 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:33:07,662 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:33:07,663 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:33:07,668 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-21 16:33:07,707 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:33:07,708 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:33:07,709 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:33:07,709 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:33:07,710 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:33:07,711 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:33:07,711 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:33:07,712 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:33:07,712 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:33:07,712 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:33:07,713 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:33:07,714 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-21 16:33:07,714 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:33:07,714 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:33:07,714 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:33:07,714 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-21 16:33:07,715 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-21 16:33:07,715 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-21 16:33:07,715 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:33:07,715 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-21 16:33:07,715 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-21 16:33:07,716 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-21 16:33:07,716 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:33:07,716 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:33:07,716 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:33:07,717 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:33:07,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:33:07,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:33:07,717 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:33:07,718 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:33:07,718 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-21 16:33:07,718 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-21 16:33:07,718 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-21 16:33:07,719 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_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d8799100fd609ab67add98408724f155026fd97a78e0a4112bb89c435f95463 [2022-11-21 16:33:08,083 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:33:08,110 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:33:08,113 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:33:08,114 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:33:08,117 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:33:08,119 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c [2022-11-21 16:33:11,436 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:33:11,658 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:33:11,658 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c [2022-11-21 16:33:11,666 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/data/6e7d6d368/419b0977cad744d3bdea9ea7223aa59e/FLAGe4a7483f2 [2022-11-21 16:33:11,679 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/data/6e7d6d368/419b0977cad744d3bdea9ea7223aa59e [2022-11-21 16:33:11,682 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:33:11,683 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:33:11,685 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:33:11,685 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:33:11,689 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:33:11,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:33:11" (1/1) ... [2022-11-21 16:33:11,691 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a846924 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:11, skipping insertion in model container [2022-11-21 16:33:11,691 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:33:11" (1/1) ... [2022-11-21 16:33:11,698 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:33:11,716 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:33:11,893 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c[2486,2499] [2022-11-21 16:33:11,903 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:33:11,918 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-21 16:33:11,922 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:33:11,938 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c[2486,2499] [2022-11-21 16:33:11,955 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:33:11,960 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:33:11,984 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c[2486,2499] [2022-11-21 16:33:11,988 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:33:12,005 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:33:12,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:12 WrapperNode [2022-11-21 16:33:12,005 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:33:12,007 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:33:12,007 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:33:12,007 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:33:12,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:12" (1/1) ... [2022-11-21 16:33:12,026 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:12" (1/1) ... [2022-11-21 16:33:12,048 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 102 [2022-11-21 16:33:12,049 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:33:12,049 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:33:12,049 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:33:12,050 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:33:12,060 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:12" (1/1) ... [2022-11-21 16:33:12,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:12" (1/1) ... [2022-11-21 16:33:12,084 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:12" (1/1) ... [2022-11-21 16:33:12,084 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:12" (1/1) ... [2022-11-21 16:33:12,095 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:12" (1/1) ... [2022-11-21 16:33:12,116 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:12" (1/1) ... [2022-11-21 16:33:12,118 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:12" (1/1) ... [2022-11-21 16:33:12,119 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:12" (1/1) ... [2022-11-21 16:33:12,130 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:33:12,131 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:33:12,131 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:33:12,131 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:33:12,132 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:12" (1/1) ... [2022-11-21 16:33:12,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:33:12,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:33:12,167 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:33:12,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:33:12,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:33:12,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-21 16:33:12,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 16:33:12,219 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-21 16:33:12,219 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-21 16:33:12,220 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-21 16:33:12,220 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-21 16:33:12,220 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-21 16:33:12,220 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-21 16:33:12,220 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-21 16:33:12,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-21 16:33:12,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-21 16:33:12,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-21 16:33:12,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:33:12,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:33:12,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 16:33:12,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-21 16:33:12,223 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-21 16:33:12,374 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:33:12,376 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:33:12,940 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:33:13,031 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:33:13,032 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-21 16:33:13,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:33:13 BoogieIcfgContainer [2022-11-21 16:33:13,034 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:33:13,037 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:33:13,037 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:33:13,040 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:33:13,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:33:11" (1/3) ... [2022-11-21 16:33:13,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cf925cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:33:13, skipping insertion in model container [2022-11-21 16:33:13,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:12" (2/3) ... [2022-11-21 16:33:13,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cf925cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:33:13, skipping insertion in model container [2022-11-21 16:33:13,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:33:13" (3/3) ... [2022-11-21 16:33:13,044 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-le-max.wvr.c [2022-11-21 16:33:13,063 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:33:13,063 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2022-11-21 16:33:13,063 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 16:33:13,207 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-21 16:33:13,263 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-21 16:33:13,286 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 177 places, 177 transitions, 378 flow [2022-11-21 16:33:13,289 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 177 places, 177 transitions, 378 flow [2022-11-21 16:33:13,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 177 transitions, 378 flow [2022-11-21 16:33:13,362 INFO L130 PetriNetUnfolder]: 10/174 cut-off events. [2022-11-21 16:33:13,362 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-21 16:33:13,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 174 events. 10/174 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 174 event pairs, 0 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 134. Up to 2 conditions per place. [2022-11-21 16:33:13,371 INFO L119 LiptonReduction]: Number of co-enabled transitions 1742 [2022-11-21 16:33:41,670 INFO L134 LiptonReduction]: Checked pairs total: 2788 [2022-11-21 16:33:41,671 INFO L136 LiptonReduction]: Total number of compositions: 183 [2022-11-21 16:33:41,679 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 60 places, 53 transitions, 130 flow [2022-11-21 16:33:41,749 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 694 states, 538 states have (on average 3.87546468401487) internal successors, (2085), 693 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:41,768 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:33:41,774 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;@34443cc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:33:41,775 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2022-11-21 16:33:41,779 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 538 states have (on average 3.87546468401487) internal successors, (2085), 693 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:41,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-21 16:33:41,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:33:41,785 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-21 16:33:41,786 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-21 16:33:41,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:33:41,792 INFO L85 PathProgramCache]: Analyzing trace with hash 22077, now seen corresponding path program 1 times [2022-11-21 16:33:41,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:33:41,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [771834861] [2022-11-21 16:33:41,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:41,806 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 [2022-11-21 16:33:41,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:33:41,814 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:33:41,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:33:41,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:41,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-21 16:33:41,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:33:41,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:33:41,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:33:41,970 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:33:41,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [771834861] [2022-11-21 16:33:41,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [771834861] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:33:41,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:33:41,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-21 16:33:41,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828383146] [2022-11-21 16:33:41,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:33:41,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 16:33:41,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:33:42,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 16:33:42,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:33:42,012 INFO L87 Difference]: Start difference. First operand has 694 states, 538 states have (on average 3.87546468401487) internal successors, (2085), 693 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 2.0) 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) [2022-11-21 16:33:42,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:33:42,283 INFO L93 Difference]: Finished difference Result 379 states and 1114 transitions. [2022-11-21 16:33:42,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 16:33:42,286 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 2.0) 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 [2022-11-21 16:33:42,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:33:42,309 INFO L225 Difference]: With dead ends: 379 [2022-11-21 16:33:42,310 INFO L226 Difference]: Without dead ends: 379 [2022-11-21 16:33:42,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:33:42,316 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:33:42,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:33:42,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-11-21 16:33:42,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2022-11-21 16:33:42,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 314 states have (on average 3.5477707006369426) internal successors, (1114), 378 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:42,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1114 transitions. [2022-11-21 16:33:42,426 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1114 transitions. Word has length 2 [2022-11-21 16:33:42,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:33:42,429 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 1114 transitions. [2022-11-21 16:33:42,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 2.0) 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) [2022-11-21 16:33:42,430 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1114 transitions. [2022-11-21 16:33:42,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-21 16:33:42,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:33:42,430 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-21 16:33:42,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-21 16:33:42,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:33:42,649 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-21 16:33:42,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:33:42,650 INFO L85 PathProgramCache]: Analyzing trace with hash 22078, now seen corresponding path program 1 times [2022-11-21 16:33:42,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:33:42,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1771188352] [2022-11-21 16:33:42,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:42,651 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 [2022-11-21 16:33:42,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:33:42,652 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:33:42,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:33:42,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:42,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-21 16:33:42,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:33:42,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:33:42,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:33:42,828 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:33:42,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1771188352] [2022-11-21 16:33:42,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1771188352] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:33:42,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:33:42,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-21 16:33:42,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210833726] [2022-11-21 16:33:42,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:33:42,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:33:42,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:33:42,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:33:42,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:33:42,833 INFO L87 Difference]: Start difference. First operand 379 states and 1114 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) [2022-11-21 16:33:43,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:33:43,147 INFO L93 Difference]: Finished difference Result 382 states and 1117 transitions. [2022-11-21 16:33:43,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:33:43,148 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 [2022-11-21 16:33:43,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:33:43,151 INFO L225 Difference]: With dead ends: 382 [2022-11-21 16:33:43,151 INFO L226 Difference]: Without dead ends: 382 [2022-11-21 16:33:43,151 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 [2022-11-21 16:33:43,152 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:33:43,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 4 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:33:43,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-11-21 16:33:43,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 380. [2022-11-21 16:33:43,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 315 states have (on average 3.546031746031746) internal successors, (1117), 379 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:43,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1117 transitions. [2022-11-21 16:33:43,185 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1117 transitions. Word has length 2 [2022-11-21 16:33:43,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:33:43,186 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 1117 transitions. [2022-11-21 16:33:43,186 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) [2022-11-21 16:33:43,186 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1117 transitions. [2022-11-21 16:33:43,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-21 16:33:43,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:33:43,187 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-21 16:33:43,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-21 16:33:43,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:33:43,399 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-21 16:33:43,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:33:43,399 INFO L85 PathProgramCache]: Analyzing trace with hash 21952, now seen corresponding path program 1 times [2022-11-21 16:33:43,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:33:43,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [509102706] [2022-11-21 16:33:43,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:43,400 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 [2022-11-21 16:33:43,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:33:43,405 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:33:43,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:33:43,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:43,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-21 16:33:43,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:33:43,713 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-21 16:33:43,714 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 [2022-11-21 16:33:43,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:33:43,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:33:43,758 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:33:43,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [509102706] [2022-11-21 16:33:43,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [509102706] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:33:43,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:33:43,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-21 16:33:43,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840789204] [2022-11-21 16:33:43,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:33:43,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:33:43,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:33:43,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:33:43,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:33:43,764 INFO L87 Difference]: Start difference. First operand 380 states and 1117 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) [2022-11-21 16:33:43,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:33:43,994 INFO L93 Difference]: Finished difference Result 378 states and 1114 transitions. [2022-11-21 16:33:43,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:33:43,995 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 [2022-11-21 16:33:43,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:33:43,998 INFO L225 Difference]: With dead ends: 378 [2022-11-21 16:33:43,998 INFO L226 Difference]: Without dead ends: 378 [2022-11-21 16:33:43,998 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 [2022-11-21 16:33:43,999 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:33:43,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 2 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:33:44,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-11-21 16:33:44,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2022-11-21 16:33:44,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 315 states have (on average 3.5365079365079364) internal successors, (1114), 377 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:44,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1114 transitions. [2022-11-21 16:33:44,015 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1114 transitions. Word has length 2 [2022-11-21 16:33:44,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:33:44,015 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 1114 transitions. [2022-11-21 16:33:44,015 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) [2022-11-21 16:33:44,015 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1114 transitions. [2022-11-21 16:33:44,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-21 16:33:44,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:33:44,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-21 16:33:44,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:33:44,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:33:44,228 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-21 16:33:44,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:33:44,229 INFO L85 PathProgramCache]: Analyzing trace with hash 21953, now seen corresponding path program 1 times [2022-11-21 16:33:44,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:33:44,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1796083192] [2022-11-21 16:33:44,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:44,229 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 [2022-11-21 16:33:44,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:33:44,231 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:33:44,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:33:44,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:44,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 16:33:44,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:33:44,504 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 16:33:44,505 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 [2022-11-21 16:33:44,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:33:44,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:33:44,558 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:33:44,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1796083192] [2022-11-21 16:33:44,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1796083192] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:33:44,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:33:44,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-21 16:33:44,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112344867] [2022-11-21 16:33:44,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:33:44,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:33:44,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:33:44,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:33:44,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:33:44,561 INFO L87 Difference]: Start difference. First operand 378 states and 1114 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) [2022-11-21 16:33:44,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:33:44,863 INFO L93 Difference]: Finished difference Result 378 states and 1113 transitions. [2022-11-21 16:33:44,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:33:44,864 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 [2022-11-21 16:33:44,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:33:44,867 INFO L225 Difference]: With dead ends: 378 [2022-11-21 16:33:44,867 INFO L226 Difference]: Without dead ends: 378 [2022-11-21 16:33:44,868 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 [2022-11-21 16:33:44,869 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:33:44,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:33:44,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-11-21 16:33:44,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2022-11-21 16:33:44,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 315 states have (on average 3.533333333333333) internal successors, (1113), 377 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:44,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1113 transitions. [2022-11-21 16:33:44,886 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1113 transitions. Word has length 2 [2022-11-21 16:33:44,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:33:44,887 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 1113 transitions. [2022-11-21 16:33:44,887 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) [2022-11-21 16:33:44,887 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1113 transitions. [2022-11-21 16:33:44,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-21 16:33:44,888 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:33:44,888 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-21 16:33:44,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-21 16:33:45,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:33:45,102 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-21 16:33:45,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:33:45,102 INFO L85 PathProgramCache]: Analyzing trace with hash 684517, now seen corresponding path program 1 times [2022-11-21 16:33:45,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:33:45,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [489381347] [2022-11-21 16:33:45,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:45,103 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 [2022-11-21 16:33:45,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:33:45,106 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:33:45,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:33:45,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:45,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 16:33:45,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:33:45,348 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2022-11-21 16:33:45,349 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 6 case distinctions, treesize of input 38 treesize of output 47 [2022-11-21 16:33:45,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:33:45,491 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:33:45,492 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:33:45,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [489381347] [2022-11-21 16:33:45,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [489381347] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:33:45,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:33:45,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-21 16:33:45,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98230040] [2022-11-21 16:33:45,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:33:45,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:33:45,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:33:45,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:33:45,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:33:45,495 INFO L87 Difference]: Start difference. First operand 378 states and 1113 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:45,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:33:45,862 INFO L93 Difference]: Finished difference Result 327 states and 937 transitions. [2022-11-21 16:33:45,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:33:45,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-21 16:33:45,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:33:45,866 INFO L225 Difference]: With dead ends: 327 [2022-11-21 16:33:45,866 INFO L226 Difference]: Without dead ends: 327 [2022-11-21 16:33:45,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:33:45,868 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 16:33:45,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 2 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 16:33:45,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-11-21 16:33:45,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2022-11-21 16:33:45,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 274 states have (on average 3.4197080291970803) internal successors, (937), 326 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:45,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 937 transitions. [2022-11-21 16:33:45,888 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 937 transitions. Word has length 3 [2022-11-21 16:33:45,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:33:45,888 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 937 transitions. [2022-11-21 16:33:45,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:45,889 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 937 transitions. [2022-11-21 16:33:45,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-21 16:33:45,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:33:45,890 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-21 16:33:45,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:33:46,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:33:46,103 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-21 16:33:46,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:33:46,103 INFO L85 PathProgramCache]: Analyzing trace with hash 684519, now seen corresponding path program 1 times [2022-11-21 16:33:46,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:33:46,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1750400294] [2022-11-21 16:33:46,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:46,104 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 [2022-11-21 16:33:46,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:33:46,105 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:33:46,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:33:46,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:46,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 16:33:46,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:33:46,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:33:46,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:33:46,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:33:46,365 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2022-11-21 16:33:46,365 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 3 case distinctions, treesize of input 17 treesize of output 35 [2022-11-21 16:33:46,389 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-21 16:33:46,390 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 [2022-11-21 16:33:46,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:33:46,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:33:46,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:33:46,952 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:33:46,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1750400294] [2022-11-21 16:33:46,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1750400294] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:33:46,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:33:46,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-21 16:33:46,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743307265] [2022-11-21 16:33:46,953 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:33:46,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:33:46,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:33:46,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:33:46,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:33:46,954 INFO L87 Difference]: Start difference. First operand 327 states and 937 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) [2022-11-21 16:33:48,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:33:48,031 INFO L93 Difference]: Finished difference Result 605 states and 1704 transitions. [2022-11-21 16:33:48,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:33:48,032 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 [2022-11-21 16:33:48,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:33:48,036 INFO L225 Difference]: With dead ends: 605 [2022-11-21 16:33:48,037 INFO L226 Difference]: Without dead ends: 605 [2022-11-21 16:33:48,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:33:48,038 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 107 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-21 16:33:48,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 6 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-21 16:33:48,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-11-21 16:33:48,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 441. [2022-11-21 16:33:48,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 388 states have (on average 3.4922680412371134) internal successors, (1355), 440 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:48,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1355 transitions. [2022-11-21 16:33:48,058 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1355 transitions. Word has length 3 [2022-11-21 16:33:48,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:33:48,058 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 1355 transitions. [2022-11-21 16:33:48,059 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) [2022-11-21 16:33:48,059 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1355 transitions. [2022-11-21 16:33:48,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-21 16:33:48,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:33:48,060 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-21 16:33:48,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:33:48,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:33:48,275 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-21 16:33:48,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:33:48,276 INFO L85 PathProgramCache]: Analyzing trace with hash 684392, now seen corresponding path program 1 times [2022-11-21 16:33:48,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:33:48,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [351076621] [2022-11-21 16:33:48,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:48,276 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 [2022-11-21 16:33:48,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:33:48,278 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:33:48,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:33:48,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:48,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-21 16:33:48,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:33:48,525 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 16:33:48,526 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 [2022-11-21 16:33:48,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:33:48,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:33:48,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:33:48,881 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:33:48,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [351076621] [2022-11-21 16:33:48,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [351076621] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:33:48,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:33:48,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-21 16:33:48,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781905076] [2022-11-21 16:33:48,882 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:33:48,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:33:48,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:33:48,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:33:48,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:33:48,883 INFO L87 Difference]: Start difference. First operand 441 states and 1355 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) [2022-11-21 16:33:49,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:33:49,723 INFO L93 Difference]: Finished difference Result 601 states and 1700 transitions. [2022-11-21 16:33:49,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:33:49,725 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 [2022-11-21 16:33:49,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:33:49,729 INFO L225 Difference]: With dead ends: 601 [2022-11-21 16:33:49,730 INFO L226 Difference]: Without dead ends: 601 [2022-11-21 16:33:49,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:33:49,731 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 102 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-21 16:33:49,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 6 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-21 16:33:49,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-11-21 16:33:49,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 441. [2022-11-21 16:33:49,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 388 states have (on average 3.481958762886598) internal successors, (1351), 440 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:49,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1351 transitions. [2022-11-21 16:33:49,752 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1351 transitions. Word has length 3 [2022-11-21 16:33:49,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:33:49,752 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 1351 transitions. [2022-11-21 16:33:49,753 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) [2022-11-21 16:33:49,753 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1351 transitions. [2022-11-21 16:33:49,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-21 16:33:49,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:33:49,754 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1] [2022-11-21 16:33:49,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:33:49,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:33:49,967 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-21 16:33:49,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:33:49,967 INFO L85 PathProgramCache]: Analyzing trace with hash 21220124, now seen corresponding path program 1 times [2022-11-21 16:33:49,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:33:49,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358493343] [2022-11-21 16:33:49,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:49,968 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 [2022-11-21 16:33:49,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:33:49,969 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:33:49,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:33:50,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:50,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 16:33:50,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:33:50,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:33:50,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:33:50,181 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 25 treesize of output 21 [2022-11-21 16:33:50,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:33:50,336 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:33:50,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358493343] [2022-11-21 16:33:50,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [358493343] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:33:50,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:33:50,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-21 16:33:50,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686731352] [2022-11-21 16:33:50,336 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:33:50,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 16:33:50,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:33:50,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 16:33:50,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:33:50,338 INFO L87 Difference]: Start difference. First operand 441 states and 1351 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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) [2022-11-21 16:33:51,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:33:51,578 INFO L93 Difference]: Finished difference Result 1242 states and 3557 transitions. [2022-11-21 16:33:51,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:33:51,579 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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 4 [2022-11-21 16:33:51,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:33:51,587 INFO L225 Difference]: With dead ends: 1242 [2022-11-21 16:33:51,588 INFO L226 Difference]: Without dead ends: 1242 [2022-11-21 16:33:51,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:33:51,589 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 267 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:33:51,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 16 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-21 16:33:51,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2022-11-21 16:33:51,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 440. [2022-11-21 16:33:51,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 388 states have (on average 3.4742268041237114) internal successors, (1348), 439 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:51,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1348 transitions. [2022-11-21 16:33:51,616 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1348 transitions. Word has length 4 [2022-11-21 16:33:51,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:33:51,617 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 1348 transitions. [2022-11-21 16:33:51,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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) [2022-11-21 16:33:51,617 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1348 transitions. [2022-11-21 16:33:51,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-21 16:33:51,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:33:51,618 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-21 16:33:51,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-21 16:33:51,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:33:51,830 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-21 16:33:51,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:33:51,830 INFO L85 PathProgramCache]: Analyzing trace with hash 657833144, now seen corresponding path program 1 times [2022-11-21 16:33:51,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:33:51,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [145301282] [2022-11-21 16:33:51,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:51,831 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 [2022-11-21 16:33:51,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:33:51,832 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:33:51,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:33:51,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:51,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-21 16:33:51,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:33:52,061 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-21 16:33:52,062 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 4 case distinctions, treesize of input 29 treesize of output 40 [2022-11-21 16:33:52,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:33:52,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:33:52,188 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:33:52,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [145301282] [2022-11-21 16:33:52,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [145301282] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:33:52,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:33:52,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-21 16:33:52,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319391076] [2022-11-21 16:33:52,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:33:52,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:33:52,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:33:52,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:33:52,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:33:52,191 INFO L87 Difference]: Start difference. First operand 440 states and 1348 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2022-11-21 16:33:52,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:33:52,392 INFO L93 Difference]: Finished difference Result 425 states and 1308 transitions. [2022-11-21 16:33:52,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:33:52,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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 [2022-11-21 16:33:52,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:33:52,396 INFO L225 Difference]: With dead ends: 425 [2022-11-21 16:33:52,396 INFO L226 Difference]: Without dead ends: 425 [2022-11-21 16:33:52,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:33:52,397 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:33:52,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 2 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:33:52,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-11-21 16:33:52,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 425. [2022-11-21 16:33:52,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 379 states have (on average 3.451187335092348) internal successors, (1308), 424 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:52,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 1308 transitions. [2022-11-21 16:33:52,428 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 1308 transitions. Word has length 5 [2022-11-21 16:33:52,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:33:52,429 INFO L495 AbstractCegarLoop]: Abstraction has 425 states and 1308 transitions. [2022-11-21 16:33:52,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2022-11-21 16:33:52,429 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 1308 transitions. [2022-11-21 16:33:52,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-21 16:33:52,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:33:52,430 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-21 16:33:52,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:33:52,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:33:52,643 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-21 16:33:52,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:33:52,643 INFO L85 PathProgramCache]: Analyzing trace with hash 657833145, now seen corresponding path program 1 times [2022-11-21 16:33:52,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:33:52,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041672921] [2022-11-21 16:33:52,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:52,644 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 [2022-11-21 16:33:52,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:33:52,645 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:33:52,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:33:52,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:52,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-21 16:33:52,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:33:52,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:33:52,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:33:52,904 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-21 16:33:52,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-21 16:33:52,919 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 [2022-11-21 16:33:53,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:33:53,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:33:53,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:33:53,460 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:33:53,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041672921] [2022-11-21 16:33:53,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041672921] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:33:53,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:33:53,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-21 16:33:53,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276722621] [2022-11-21 16:33:53,461 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:33:53,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 16:33:53,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:33:53,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 16:33:53,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:33:53,461 INFO L87 Difference]: Start difference. First operand 425 states and 1308 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 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) [2022-11-21 16:33:54,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:33:54,074 INFO L93 Difference]: Finished difference Result 540 states and 1557 transitions. [2022-11-21 16:33:54,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:33:54,075 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 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 5 [2022-11-21 16:33:54,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:33:54,079 INFO L225 Difference]: With dead ends: 540 [2022-11-21 16:33:54,079 INFO L226 Difference]: Without dead ends: 540 [2022-11-21 16:33:54,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:33:54,081 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 148 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:33:54,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 6 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-21 16:33:54,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-11-21 16:33:54,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 410. [2022-11-21 16:33:54,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 370 states have (on average 3.427027027027027) internal successors, (1268), 409 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:54,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1268 transitions. [2022-11-21 16:33:54,100 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1268 transitions. Word has length 5 [2022-11-21 16:33:54,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:33:54,100 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 1268 transitions. [2022-11-21 16:33:54,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 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) [2022-11-21 16:33:54,101 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1268 transitions. [2022-11-21 16:33:54,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-21 16:33:54,102 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:33:54,102 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-21 16:33:54,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:33:54,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:33:54,315 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-21 16:33:54,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:33:54,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1082014180, now seen corresponding path program 1 times [2022-11-21 16:33:54,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:33:54,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [769753296] [2022-11-21 16:33:54,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:54,316 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 [2022-11-21 16:33:54,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:33:54,317 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:33:54,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:33:54,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:54,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-21 16:33:54,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:33:54,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:33:54,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:33:54,441 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:33:54,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [769753296] [2022-11-21 16:33:54,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [769753296] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:33:54,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:33:54,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:33:54,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525824827] [2022-11-21 16:33:54,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:33:54,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:33:54,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:33:54,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:33:54,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:33:54,442 INFO L87 Difference]: Start difference. First operand 410 states and 1268 transitions. Second operand has 3 states, 2 states have (on average 3.0) 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) [2022-11-21 16:33:54,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:33:54,630 INFO L93 Difference]: Finished difference Result 276 states and 836 transitions. [2022-11-21 16:33:54,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:33:54,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) 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 [2022-11-21 16:33:54,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:33:54,633 INFO L225 Difference]: With dead ends: 276 [2022-11-21 16:33:54,634 INFO L226 Difference]: Without dead ends: 276 [2022-11-21 16:33:54,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:33:54,635 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:33:54,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 2 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:33:54,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-11-21 16:33:54,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2022-11-21 16:33:54,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 256 states have (on average 3.265625) internal successors, (836), 275 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:54,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 836 transitions. [2022-11-21 16:33:54,648 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 836 transitions. Word has length 6 [2022-11-21 16:33:54,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:33:54,648 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 836 transitions. [2022-11-21 16:33:54,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) 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) [2022-11-21 16:33:54,649 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 836 transitions. [2022-11-21 16:33:54,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-21 16:33:54,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:33:54,650 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-21 16:33:54,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-21 16:33:54,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:33:54,863 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-21 16:33:54,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:33:54,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1082014179, now seen corresponding path program 1 times [2022-11-21 16:33:54,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:33:54,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [23102164] [2022-11-21 16:33:54,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:54,864 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 [2022-11-21 16:33:54,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:33:54,865 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:33:54,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:33:54,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:54,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 16:33:54,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:33:55,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:33:55,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:33:55,033 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:33:55,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [23102164] [2022-11-21 16:33:55,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [23102164] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:33:55,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:33:55,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:33:55,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289711180] [2022-11-21 16:33:55,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:33:55,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:33:55,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:33:55,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:33:55,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:33:55,035 INFO L87 Difference]: Start difference. First operand 276 states and 836 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 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) [2022-11-21 16:33:55,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:33:55,410 INFO L93 Difference]: Finished difference Result 422 states and 1274 transitions. [2022-11-21 16:33:55,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:33:55,411 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 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 [2022-11-21 16:33:55,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:33:55,414 INFO L225 Difference]: With dead ends: 422 [2022-11-21 16:33:55,414 INFO L226 Difference]: Without dead ends: 422 [2022-11-21 16:33:55,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:33:55,415 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 87 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:33:55,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 4 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:33:55,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-11-21 16:33:55,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 336. [2022-11-21 16:33:55,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 316 states have (on average 3.4430379746835444) internal successors, (1088), 335 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:55,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1088 transitions. [2022-11-21 16:33:55,431 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1088 transitions. Word has length 6 [2022-11-21 16:33:55,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:33:55,432 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 1088 transitions. [2022-11-21 16:33:55,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 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) [2022-11-21 16:33:55,432 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1088 transitions. [2022-11-21 16:33:55,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-21 16:33:55,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:33:55,433 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-21 16:33:55,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:33:55,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:33:55,646 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-21 16:33:55,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:33:55,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1082292224, now seen corresponding path program 2 times [2022-11-21 16:33:55,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:33:55,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [659448601] [2022-11-21 16:33:55,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:33:55,647 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 [2022-11-21 16:33:55,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:33:55,649 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:33:55,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:33:55,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-21 16:33:55,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:33:55,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-21 16:33:55,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:33:55,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:33:55,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:33:55,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:33:55,915 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-21 16:33:55,916 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 3 case distinctions, treesize of input 15 treesize of output 33 [2022-11-21 16:33:55,946 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-21 16:33:55,946 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 [2022-11-21 16:33:56,046 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-21 16:33:56,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:33:56,046 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:33:56,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [659448601] [2022-11-21 16:33:56,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [659448601] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:33:56,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:33:56,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-21 16:33:56,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8479878] [2022-11-21 16:33:56,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:33:56,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:33:56,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:33:56,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:33:56,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:33:56,049 INFO L87 Difference]: Start difference. First operand 336 states and 1088 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:56,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:33:56,205 INFO L93 Difference]: Finished difference Result 335 states and 1087 transitions. [2022-11-21 16:33:56,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:33:56,206 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-21 16:33:56,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:33:56,209 INFO L225 Difference]: With dead ends: 335 [2022-11-21 16:33:56,209 INFO L226 Difference]: Without dead ends: 335 [2022-11-21 16:33:56,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:33:56,210 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 28 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:33:56,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 2 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:33:56,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-11-21 16:33:56,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 335. [2022-11-21 16:33:56,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 316 states have (on average 3.439873417721519) internal successors, (1087), 334 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:56,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1087 transitions. [2022-11-21 16:33:56,225 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1087 transitions. Word has length 6 [2022-11-21 16:33:56,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:33:56,225 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 1087 transitions. [2022-11-21 16:33:56,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:33:56,226 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1087 transitions. [2022-11-21 16:33:56,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-21 16:33:56,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:33:56,227 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-21 16:33:56,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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)] Ended with exit code 0 [2022-11-21 16:33:56,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:33:56,440 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-21 16:33:56,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:33:56,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1082292351, now seen corresponding path program 2 times [2022-11-21 16:33:56,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:33:56,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [474039187] [2022-11-21 16:33:56,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:33:56,440 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 [2022-11-21 16:33:56,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:33:56,443 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:33:56,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:33:56,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:33:56,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:33:56,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-21 16:33:56,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:33:56,739 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 16:33:56,739 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 [2022-11-21 16:33:56,960 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:33:56,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:33:57,779 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:33:57,780 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:33:57,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [474039187] [2022-11-21 16:33:57,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [474039187] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:33:57,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:33:57,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-21 16:33:57,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120217456] [2022-11-21 16:33:57,781 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:33:57,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 16:33:57,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:33:57,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 16:33:57,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-21 16:33:57,782 INFO L87 Difference]: Start difference. First operand 335 states and 1087 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) [2022-11-21 16:34:02,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:34:02,213 INFO L93 Difference]: Finished difference Result 1869 states and 5771 transitions. [2022-11-21 16:34:02,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 16:34:02,215 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 [2022-11-21 16:34:02,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:34:02,226 INFO L225 Difference]: With dead ends: 1869 [2022-11-21 16:34:02,227 INFO L226 Difference]: Without dead ends: 1869 [2022-11-21 16:34:02,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-11-21 16:34:02,228 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 486 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-21 16:34:02,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 46 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-21 16:34:02,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2022-11-21 16:34:02,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 341. [2022-11-21 16:34:02,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 322 states have (on average 3.4130434782608696) internal successors, (1099), 340 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:02,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1099 transitions. [2022-11-21 16:34:02,269 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1099 transitions. Word has length 6 [2022-11-21 16:34:02,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:34:02,269 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 1099 transitions. [2022-11-21 16:34:02,270 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) [2022-11-21 16:34:02,270 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1099 transitions. [2022-11-21 16:34:02,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-21 16:34:02,272 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:34:02,272 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:34:02,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-21 16:34:02,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:34:02,484 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-21 16:34:02,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:34:02,484 INFO L85 PathProgramCache]: Analyzing trace with hash 817303731, now seen corresponding path program 1 times [2022-11-21 16:34:02,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:34:02,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2094675750] [2022-11-21 16:34:02,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:34:02,485 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 [2022-11-21 16:34:02,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:34:02,486 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:34:02,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:34:02,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:34:02,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-21 16:34:02,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:34:02,736 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 16:34:02,737 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 [2022-11-21 16:34:02,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:34:02,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:34:03,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:34:03,453 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:34:03,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2094675750] [2022-11-21 16:34:03,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2094675750] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:34:03,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:34:03,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-21 16:34:03,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222606735] [2022-11-21 16:34:03,454 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:34:03,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 16:34:03,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:34:03,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 16:34:03,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:34:03,455 INFO L87 Difference]: Start difference. First operand 341 states and 1099 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2022-11-21 16:34:04,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:34:04,951 INFO L93 Difference]: Finished difference Result 607 states and 1981 transitions. [2022-11-21 16:34:04,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 16:34:04,952 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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 7 [2022-11-21 16:34:04,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:34:04,956 INFO L225 Difference]: With dead ends: 607 [2022-11-21 16:34:04,956 INFO L226 Difference]: Without dead ends: 607 [2022-11-21 16:34:04,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-11-21 16:34:04,957 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 198 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:34:04,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 11 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-21 16:34:04,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-11-21 16:34:04,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 521. [2022-11-21 16:34:04,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 502 states have (on average 3.5756972111553784) internal successors, (1795), 520 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:04,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1795 transitions. [2022-11-21 16:34:04,978 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1795 transitions. Word has length 7 [2022-11-21 16:34:04,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:34:04,979 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 1795 transitions. [2022-11-21 16:34:04,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2022-11-21 16:34:04,979 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1795 transitions. [2022-11-21 16:34:04,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-21 16:34:04,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:34:04,980 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:34:04,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:34:05,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:34:05,193 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-21 16:34:05,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:34:05,193 INFO L85 PathProgramCache]: Analyzing trace with hash 817473219, now seen corresponding path program 1 times [2022-11-21 16:34:05,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:34:05,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [502255350] [2022-11-21 16:34:05,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:34:05,195 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 [2022-11-21 16:34:05,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:34:05,196 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:34:05,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:34:05,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:34:05,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-21 16:34:05,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:34:05,483 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-21 16:34:05,483 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 29 [2022-11-21 16:34:05,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:34:05,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:34:05,523 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:34:05,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [502255350] [2022-11-21 16:34:05,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [502255350] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:34:05,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:34:05,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-21 16:34:05,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964836470] [2022-11-21 16:34:05,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:34:05,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:34:05,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:34:05,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:34:05,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:34:05,528 INFO L87 Difference]: Start difference. First operand 521 states and 1795 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2022-11-21 16:34:05,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:34:05,683 INFO L93 Difference]: Finished difference Result 487 states and 1652 transitions. [2022-11-21 16:34:05,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:34:05,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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 [2022-11-21 16:34:05,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:34:05,687 INFO L225 Difference]: With dead ends: 487 [2022-11-21 16:34:05,687 INFO L226 Difference]: Without dead ends: 487 [2022-11-21 16:34:05,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:34:05,688 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 22 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:34:05,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 2 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:34:05,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-11-21 16:34:05,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 487. [2022-11-21 16:34:05,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 473 states have (on average 3.492600422832981) internal successors, (1652), 486 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:05,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1652 transitions. [2022-11-21 16:34:05,711 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1652 transitions. Word has length 7 [2022-11-21 16:34:05,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:34:05,712 INFO L495 AbstractCegarLoop]: Abstraction has 487 states and 1652 transitions. [2022-11-21 16:34:05,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2022-11-21 16:34:05,712 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1652 transitions. [2022-11-21 16:34:05,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-21 16:34:05,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:34:05,713 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:34:05,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:34:05,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:34:05,925 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-21 16:34:05,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:34:05,926 INFO L85 PathProgramCache]: Analyzing trace with hash 817473220, now seen corresponding path program 1 times [2022-11-21 16:34:05,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:34:05,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1999295796] [2022-11-21 16:34:05,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:34:05,926 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 [2022-11-21 16:34:05,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:34:05,928 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:34:05,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:34:06,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:34:06,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-21 16:34:06,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:34:06,265 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 16:34:06,266 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 17 treesize of output 44 [2022-11-21 16:34:06,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:34:06,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:34:06,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:34:06,871 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:34:06,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1999295796] [2022-11-21 16:34:06,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1999295796] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:34:06,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:34:06,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-21 16:34:06,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012758363] [2022-11-21 16:34:06,872 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:34:06,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 16:34:06,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:34:06,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 16:34:06,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:34:06,873 INFO L87 Difference]: Start difference. First operand 487 states and 1652 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 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) [2022-11-21 16:34:07,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:34:07,407 INFO L93 Difference]: Finished difference Result 539 states and 1741 transitions. [2022-11-21 16:34:07,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:34:07,408 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 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 7 [2022-11-21 16:34:07,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:34:07,412 INFO L225 Difference]: With dead ends: 539 [2022-11-21 16:34:07,412 INFO L226 Difference]: Without dead ends: 539 [2022-11-21 16:34:07,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:34:07,413 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 117 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 16:34:07,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 6 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 16:34:07,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-11-21 16:34:07,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 453. [2022-11-21 16:34:07,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 444 states have (on average 3.3986486486486487) internal successors, (1509), 452 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:07,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1509 transitions. [2022-11-21 16:34:07,432 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1509 transitions. Word has length 7 [2022-11-21 16:34:07,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:34:07,433 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 1509 transitions. [2022-11-21 16:34:07,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 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) [2022-11-21 16:34:07,433 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1509 transitions. [2022-11-21 16:34:07,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-21 16:34:07,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:34:07,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:34:07,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:34:07,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:34:07,647 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-21 16:34:07,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:34:07,648 INFO L85 PathProgramCache]: Analyzing trace with hash -428138500, now seen corresponding path program 1 times [2022-11-21 16:34:07,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:34:07,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [85281985] [2022-11-21 16:34:07,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:34:07,648 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 [2022-11-21 16:34:07,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:34:07,650 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:34:07,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:34:07,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:34:07,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 16:34:07,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:34:07,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:34:07,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:34:07,857 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:34:07,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [85281985] [2022-11-21 16:34:07,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [85281985] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:34:07,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:34:07,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:34:07,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022303514] [2022-11-21 16:34:07,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:34:07,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:34:07,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:34:07,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:34:07,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:34:07,858 INFO L87 Difference]: Start difference. First operand 453 states and 1509 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) [2022-11-21 16:34:08,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:34:08,191 INFO L93 Difference]: Finished difference Result 659 states and 2217 transitions. [2022-11-21 16:34:08,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:34:08,191 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 [2022-11-21 16:34:08,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:34:08,195 INFO L225 Difference]: With dead ends: 659 [2022-11-21 16:34:08,195 INFO L226 Difference]: Without dead ends: 659 [2022-11-21 16:34:08,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:34:08,196 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 66 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:34:08,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 4 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:34:08,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-11-21 16:34:08,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 553. [2022-11-21 16:34:08,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 544 states have (on average 3.6011029411764706) internal successors, (1959), 552 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:08,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 1959 transitions. [2022-11-21 16:34:08,216 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 1959 transitions. Word has length 8 [2022-11-21 16:34:08,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:34:08,216 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 1959 transitions. [2022-11-21 16:34:08,216 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) [2022-11-21 16:34:08,217 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 1959 transitions. [2022-11-21 16:34:08,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-21 16:34:08,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:34:08,218 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:34:08,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:34:08,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:34:08,435 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-21 16:34:08,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:34:08,436 INFO L85 PathProgramCache]: Analyzing trace with hash -387387569, now seen corresponding path program 1 times [2022-11-21 16:34:08,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:34:08,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1217078347] [2022-11-21 16:34:08,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:34:08,437 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 [2022-11-21 16:34:08,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:34:08,438 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:34:08,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:34:08,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:34:08,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-21 16:34:08,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:34:08,744 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 16:34:08,744 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 [2022-11-21 16:34:08,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:34:08,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:34:09,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:34:09,535 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:34:09,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1217078347] [2022-11-21 16:34:09,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1217078347] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:34:09,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:34:09,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-21 16:34:09,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637700045] [2022-11-21 16:34:09,536 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:34:09,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 16:34:09,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:34:09,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 16:34:09,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:34:09,537 INFO L87 Difference]: Start difference. First operand 553 states and 1959 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) [2022-11-21 16:34:11,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:34:11,285 INFO L93 Difference]: Finished difference Result 959 states and 3467 transitions. [2022-11-21 16:34:11,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 16:34:11,286 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 [2022-11-21 16:34:11,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:34:11,293 INFO L225 Difference]: With dead ends: 959 [2022-11-21 16:34:11,294 INFO L226 Difference]: Without dead ends: 959 [2022-11-21 16:34:11,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-11-21 16:34:11,295 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 203 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:34:11,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 10 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-21 16:34:11,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-11-21 16:34:11,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 853. [2022-11-21 16:34:11,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 844 states have (on average 3.802132701421801) internal successors, (3209), 852 states have internal predecessors, (3209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:11,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 3209 transitions. [2022-11-21 16:34:11,342 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 3209 transitions. Word has length 9 [2022-11-21 16:34:11,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:34:11,342 INFO L495 AbstractCegarLoop]: Abstraction has 853 states and 3209 transitions. [2022-11-21 16:34:11,342 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) [2022-11-21 16:34:11,343 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 3209 transitions. [2022-11-21 16:34:11,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-21 16:34:11,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:34:11,344 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-21 16:34:11,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-21 16:34:11,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:34:11,558 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-21 16:34:11,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:34:11,559 INFO L85 PathProgramCache]: Analyzing trace with hash 130726813, now seen corresponding path program 2 times [2022-11-21 16:34:11,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:34:11,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1074247253] [2022-11-21 16:34:11,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:34:11,559 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 [2022-11-21 16:34:11,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:34:11,561 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:34:11,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:34:11,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:34:11,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:34:11,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 16:34:11,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:34:11,916 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 16:34:11,916 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 [2022-11-21 16:34:12,309 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:34:12,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:34:13,800 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:34:13,800 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:34:13,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1074247253] [2022-11-21 16:34:13,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1074247253] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:34:13,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:34:13,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-21 16:34:13,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082660711] [2022-11-21 16:34:13,801 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:34:13,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-21 16:34:13,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:34:13,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-21 16:34:13,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-21 16:34:13,802 INFO L87 Difference]: Start difference. First operand 853 states and 3209 transitions. Second operand has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 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) [2022-11-21 16:34:22,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:34:22,619 INFO L93 Difference]: Finished difference Result 1904 states and 6452 transitions. [2022-11-21 16:34:22,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-21 16:34:22,621 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 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 10 [2022-11-21 16:34:22,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:34:22,632 INFO L225 Difference]: With dead ends: 1904 [2022-11-21 16:34:22,632 INFO L226 Difference]: Without dead ends: 1904 [2022-11-21 16:34:22,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2022-11-21 16:34:22,633 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 318 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:34:22,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 66 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1033 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-11-21 16:34:22,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2022-11-21 16:34:22,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 964. [2022-11-21 16:34:22,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 955 states have (on average 3.6460732984293194) internal successors, (3482), 963 states have internal predecessors, (3482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:22,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 3482 transitions. [2022-11-21 16:34:22,672 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 3482 transitions. Word has length 10 [2022-11-21 16:34:22,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:34:22,673 INFO L495 AbstractCegarLoop]: Abstraction has 964 states and 3482 transitions. [2022-11-21 16:34:22,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 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) [2022-11-21 16:34:22,673 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 3482 transitions. [2022-11-21 16:34:22,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-21 16:34:22,674 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:34:22,674 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:34:22,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:34:22,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:34:22,887 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-21 16:34:22,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:34:22,888 INFO L85 PathProgramCache]: Analyzing trace with hash 759238518, now seen corresponding path program 1 times [2022-11-21 16:34:22,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:34:22,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2124073667] [2022-11-21 16:34:22,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:34:22,888 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 [2022-11-21 16:34:22,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:34:22,889 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:34:22,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:34:23,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:34:23,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-21 16:34:23,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:34:23,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 16:34:23,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:34:23,064 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:34:23,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2124073667] [2022-11-21 16:34:23,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2124073667] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:34:23,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:34:23,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:34:23,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624991535] [2022-11-21 16:34:23,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:34:23,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:34:23,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:34:23,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:34:23,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:34:23,066 INFO L87 Difference]: Start difference. First operand 964 states and 3482 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) [2022-11-21 16:34:23,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:34:23,198 INFO L93 Difference]: Finished difference Result 788 states and 2736 transitions. [2022-11-21 16:34:23,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:34:23,199 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 10 [2022-11-21 16:34:23,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:34:23,204 INFO L225 Difference]: With dead ends: 788 [2022-11-21 16:34:23,204 INFO L226 Difference]: Without dead ends: 788 [2022-11-21 16:34:23,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:34:23,205 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:34:23,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 2 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:34:23,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-11-21 16:34:23,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 754. [2022-11-21 16:34:23,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 749 states have (on average 3.5380507343124163) internal successors, (2650), 753 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:23,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2650 transitions. [2022-11-21 16:34:23,227 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2650 transitions. Word has length 10 [2022-11-21 16:34:23,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:34:23,227 INFO L495 AbstractCegarLoop]: Abstraction has 754 states and 2650 transitions. [2022-11-21 16:34:23,228 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) [2022-11-21 16:34:23,228 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2650 transitions. [2022-11-21 16:34:23,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-21 16:34:23,229 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:34:23,229 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:34:23,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-21 16:34:23,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:34:23,441 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-21 16:34:23,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:34:23,442 INFO L85 PathProgramCache]: Analyzing trace with hash -81929028, now seen corresponding path program 2 times [2022-11-21 16:34:23,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:34:23,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2028004702] [2022-11-21 16:34:23,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:34:23,442 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 [2022-11-21 16:34:23,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:34:23,443 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:34:23,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:34:23,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:34:23,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:34:23,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 16:34:23,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:34:23,757 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 16:34:23,757 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 [2022-11-21 16:34:24,098 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:34:24,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:34:25,481 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:34:25,481 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:34:25,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2028004702] [2022-11-21 16:34:25,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2028004702] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:34:25,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:34:25,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-21 16:34:25,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708682395] [2022-11-21 16:34:25,481 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:34:25,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-21 16:34:25,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:34:25,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-21 16:34:25,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-21 16:34:25,483 INFO L87 Difference]: Start difference. First operand 754 states and 2650 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 16 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) [2022-11-21 16:34:32,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:34:32,515 INFO L93 Difference]: Finished difference Result 1398 states and 4574 transitions. [2022-11-21 16:34:32,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-21 16:34:32,517 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 16 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 [2022-11-21 16:34:32,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:34:32,523 INFO L225 Difference]: With dead ends: 1398 [2022-11-21 16:34:32,523 INFO L226 Difference]: Without dead ends: 1398 [2022-11-21 16:34:32,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2022-11-21 16:34:32,524 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 347 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-21 16:34:32,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 54 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-21 16:34:32,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1398 states. [2022-11-21 16:34:32,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1398 to 864. [2022-11-21 16:34:32,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 859 states have (on average 3.4761350407450524) internal successors, (2986), 863 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:32,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2986 transitions. [2022-11-21 16:34:32,552 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2986 transitions. Word has length 12 [2022-11-21 16:34:32,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:34:32,553 INFO L495 AbstractCegarLoop]: Abstraction has 864 states and 2986 transitions. [2022-11-21 16:34:32,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 16 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) [2022-11-21 16:34:32,553 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2986 transitions. [2022-11-21 16:34:32,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-21 16:34:32,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:34:32,554 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2022-11-21 16:34:32,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:34:32,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:34:32,767 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-21 16:34:32,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:34:32,767 INFO L85 PathProgramCache]: Analyzing trace with hash 2006571884, now seen corresponding path program 3 times [2022-11-21 16:34:32,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:34:32,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [331795194] [2022-11-21 16:34:32,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:34:32,768 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 [2022-11-21 16:34:32,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:34:32,769 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:34:32,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:34:33,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-21 16:34:33,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:34:33,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-21 16:34:33,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:34:33,211 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 16:34:33,212 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 [2022-11-21 16:34:33,290 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 15 treesize of output 11 [2022-11-21 16:34:33,463 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 16:34:33,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:34:33,850 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 16:34:33,850 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:34:33,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [331795194] [2022-11-21 16:34:33,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [331795194] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:34:33,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:34:33,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-21 16:34:33,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704618493] [2022-11-21 16:34:33,851 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:34:33,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-21 16:34:33,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:34:33,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-21 16:34:33,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-11-21 16:34:33,852 INFO L87 Difference]: Start difference. First operand 864 states and 2986 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 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) [2022-11-21 16:34:36,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:34:36,299 INFO L93 Difference]: Finished difference Result 1203 states and 4015 transitions. [2022-11-21 16:34:36,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-21 16:34:36,300 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 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 12 [2022-11-21 16:34:36,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:34:36,306 INFO L225 Difference]: With dead ends: 1203 [2022-11-21 16:34:36,307 INFO L226 Difference]: Without dead ends: 1203 [2022-11-21 16:34:36,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2022-11-21 16:34:36,308 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 226 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:34:36,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 73 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-21 16:34:36,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2022-11-21 16:34:36,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 1077. [2022-11-21 16:34:36,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1077 states, 1072 states have (on average 3.47294776119403) internal successors, (3723), 1076 states have internal predecessors, (3723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:36,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 3723 transitions. [2022-11-21 16:34:36,345 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 3723 transitions. Word has length 12 [2022-11-21 16:34:36,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:34:36,347 INFO L495 AbstractCegarLoop]: Abstraction has 1077 states and 3723 transitions. [2022-11-21 16:34:36,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 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) [2022-11-21 16:34:36,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 3723 transitions. [2022-11-21 16:34:36,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-21 16:34:36,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:34:36,349 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-21 16:34:36,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:34:36,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:34:36,562 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-21 16:34:36,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:34:36,562 INFO L85 PathProgramCache]: Analyzing trace with hash 33320481, now seen corresponding path program 3 times [2022-11-21 16:34:36,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:34:36,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1813336300] [2022-11-21 16:34:36,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:34:36,563 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 [2022-11-21 16:34:36,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:34:36,564 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:34:36,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:34:36,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-21 16:34:36,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:34:36,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-21 16:34:36,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:34:36,978 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 16:34:36,979 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 [2022-11-21 16:34:37,493 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:34:37,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:34:40,783 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:34:40,783 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:34:40,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1813336300] [2022-11-21 16:34:40,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1813336300] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:34:40,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:34:40,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-21 16:34:40,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267560032] [2022-11-21 16:34:40,784 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:34:40,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-21 16:34:40,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:34:40,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-21 16:34:40,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-21 16:34:40,786 INFO L87 Difference]: Start difference. First operand 1077 states and 3723 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) [2022-11-21 16:35:02,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:35:02,277 INFO L93 Difference]: Finished difference Result 8485 states and 30247 transitions. [2022-11-21 16:35:02,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-21 16:35:02,279 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 [2022-11-21 16:35:02,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:35:02,360 INFO L225 Difference]: With dead ends: 8485 [2022-11-21 16:35:02,374 INFO L226 Difference]: Without dead ends: 8485 [2022-11-21 16:35:02,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-11-21 16:35:02,375 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 2691 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 2503 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2691 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 2527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 2503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-11-21 16:35:02,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2691 Valid, 238 Invalid, 2527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 2503 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2022-11-21 16:35:02,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8485 states. [2022-11-21 16:35:02,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8485 to 1089. [2022-11-21 16:35:02,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 1084 states have (on average 3.456642066420664) internal successors, (3747), 1088 states have internal predecessors, (3747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:02,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 3747 transitions. [2022-11-21 16:35:02,625 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 3747 transitions. Word has length 12 [2022-11-21 16:35:02,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:35:02,626 INFO L495 AbstractCegarLoop]: Abstraction has 1089 states and 3747 transitions. [2022-11-21 16:35:02,626 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) [2022-11-21 16:35:02,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 3747 transitions. [2022-11-21 16:35:02,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-21 16:35:02,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:35:02,628 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1] [2022-11-21 16:35:02,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:35:02,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:35:02,841 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-21 16:35:02,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:35:02,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1288777133, now seen corresponding path program 4 times [2022-11-21 16:35:02,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:35:02,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1886918990] [2022-11-21 16:35:02,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:35:02,842 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 [2022-11-21 16:35:02,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:35:02,843 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:35:02,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:35:02,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:35:02,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:35:03,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-21 16:35:03,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:35:03,246 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 16:35:03,246 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 [2022-11-21 16:35:03,703 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:35:03,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:35:05,950 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:05,950 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:35:05,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1886918990] [2022-11-21 16:35:05,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1886918990] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:35:05,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:35:05,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 21 [2022-11-21 16:35:05,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962866241] [2022-11-21 16:35:05,951 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:35:05,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-21 16:35:05,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:35:05,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-21 16:35:05,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-11-21 16:35:05,953 INFO L87 Difference]: Start difference. First operand 1089 states and 3747 transitions. Second operand has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 21 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) [2022-11-21 16:35:13,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:35:13,332 INFO L93 Difference]: Finished difference Result 1585 states and 5071 transitions. [2022-11-21 16:35:13,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-21 16:35:13,332 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 21 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 13 [2022-11-21 16:35:13,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:35:13,338 INFO L225 Difference]: With dead ends: 1585 [2022-11-21 16:35:13,338 INFO L226 Difference]: Without dead ends: 1585 [2022-11-21 16:35:13,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2022-11-21 16:35:13,340 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 678 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 2079 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 2100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:35:13,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [678 Valid, 156 Invalid, 2100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2079 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-11-21 16:35:13,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1585 states. [2022-11-21 16:35:13,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1585 to 1045. [2022-11-21 16:35:13,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1040 states have (on average 3.4548076923076922) internal successors, (3593), 1044 states have internal predecessors, (3593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:13,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 3593 transitions. [2022-11-21 16:35:13,372 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 3593 transitions. Word has length 13 [2022-11-21 16:35:13,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:35:13,372 INFO L495 AbstractCegarLoop]: Abstraction has 1045 states and 3593 transitions. [2022-11-21 16:35:13,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 21 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) [2022-11-21 16:35:13,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 3593 transitions. [2022-11-21 16:35:13,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-21 16:35:13,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:35:13,374 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2022-11-21 16:35:13,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-21 16:35:13,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:35:13,589 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-21 16:35:13,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:35:13,589 INFO L85 PathProgramCache]: Analyzing trace with hash 265308004, now seen corresponding path program 5 times [2022-11-21 16:35:13,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:35:13,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1599254494] [2022-11-21 16:35:13,590 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:35:13,590 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 [2022-11-21 16:35:13,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:35:13,591 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:35:13,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:35:13,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-21 16:35:13,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:35:13,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-21 16:35:13,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:35:13,972 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 16:35:13,972 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 [2022-11-21 16:35:14,614 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:14,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:35:17,483 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:17,483 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:35:17,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1599254494] [2022-11-21 16:35:17,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1599254494] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:35:17,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:35:17,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-21 16:35:17,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151717498] [2022-11-21 16:35:17,484 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:35:17,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-21 16:35:17,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:35:17,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-21 16:35:17,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-11-21 16:35:17,485 INFO L87 Difference]: Start difference. First operand 1045 states and 3593 transitions. Second operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 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) [2022-11-21 16:35:42,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:35:42,654 INFO L93 Difference]: Finished difference Result 1877 states and 6103 transitions. [2022-11-21 16:35:42,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-21 16:35:42,656 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 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 13 [2022-11-21 16:35:42,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:35:42,661 INFO L225 Difference]: With dead ends: 1877 [2022-11-21 16:35:42,661 INFO L226 Difference]: Without dead ends: 1877 [2022-11-21 16:35:42,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=522, Invalid=2234, Unknown=0, NotChecked=0, Total=2756 [2022-11-21 16:35:42,663 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1153 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 2912 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1153 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 2954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:35:42,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1153 Valid, 269 Invalid, 2954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2912 Invalid, 0 Unknown, 0 Unchecked, 13.1s Time] [2022-11-21 16:35:42,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2022-11-21 16:35:42,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1345. [2022-11-21 16:35:42,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1340 states have (on average 3.5365671641791043) internal successors, (4739), 1344 states have internal predecessors, (4739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:42,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 4739 transitions. [2022-11-21 16:35:42,713 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 4739 transitions. Word has length 13 [2022-11-21 16:35:42,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:35:42,714 INFO L495 AbstractCegarLoop]: Abstraction has 1345 states and 4739 transitions. [2022-11-21 16:35:42,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 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) [2022-11-21 16:35:42,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 4739 transitions. [2022-11-21 16:35:42,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-21 16:35:42,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:35:42,716 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:35:42,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:35:42,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:35:42,928 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-21 16:35:42,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:35:42,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1616400248, now seen corresponding path program 3 times [2022-11-21 16:35:42,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:35:42,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1712100776] [2022-11-21 16:35:42,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:35:42,930 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 [2022-11-21 16:35:42,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:35:42,931 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:35:42,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:35:43,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-21 16:35:43,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:35:43,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-21 16:35:43,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:35:43,397 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 16:35:43,397 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 [2022-11-21 16:35:43,875 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:43,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:35:46,294 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:46,294 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:35:46,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1712100776] [2022-11-21 16:35:46,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1712100776] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:35:46,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:35:46,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-11-21 16:35:46,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191108173] [2022-11-21 16:35:46,295 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:35:46,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-21 16:35:46,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:35:46,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-21 16:35:46,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-11-21 16:35:46,296 INFO L87 Difference]: Start difference. First operand 1345 states and 4739 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:59,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:35:59,256 INFO L93 Difference]: Finished difference Result 3064 states and 10138 transitions. [2022-11-21 16:35:59,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-21 16:35:59,257 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 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 [2022-11-21 16:35:59,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:35:59,263 INFO L225 Difference]: With dead ends: 3064 [2022-11-21 16:35:59,263 INFO L226 Difference]: Without dead ends: 3064 [2022-11-21 16:35:59,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=309, Invalid=1097, Unknown=0, NotChecked=0, Total=1406 [2022-11-21 16:35:59,264 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 768 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 1371 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:35:59,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [768 Valid, 105 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1371 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2022-11-21 16:35:59,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3064 states. [2022-11-21 16:35:59,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3064 to 1916. [2022-11-21 16:35:59,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1911 states have (on average 3.6818419675562533) internal successors, (7036), 1915 states have internal predecessors, (7036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:59,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 7036 transitions. [2022-11-21 16:35:59,334 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 7036 transitions. Word has length 14 [2022-11-21 16:35:59,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:35:59,335 INFO L495 AbstractCegarLoop]: Abstraction has 1916 states and 7036 transitions. [2022-11-21 16:35:59,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:59,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 7036 transitions. [2022-11-21 16:35:59,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-21 16:35:59,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:35:59,337 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:35:59,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:35:59,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:35:59,551 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-21 16:35:59,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:35:59,551 INFO L85 PathProgramCache]: Analyzing trace with hash 401576643, now seen corresponding path program 4 times [2022-11-21 16:35:59,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:35:59,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2001703047] [2022-11-21 16:35:59,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:35:59,552 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 [2022-11-21 16:35:59,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:35:59,553 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:35:59,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:35:59,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:35:59,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:35:59,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 16:35:59,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:35:59,857 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 16:35:59,858 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 [2022-11-21 16:36:00,178 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-21 16:36:00,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:36:01,577 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-21 16:36:01,577 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:36:01,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2001703047] [2022-11-21 16:36:01,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2001703047] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:36:01,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:36:01,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-21 16:36:01,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090648308] [2022-11-21 16:36:01,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:36:01,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-21 16:36:01,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:36:01,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-21 16:36:01,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-21 16:36:01,579 INFO L87 Difference]: Start difference. First operand 1916 states and 7036 transitions. Second operand has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 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) [2022-11-21 16:36:10,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:36:10,189 INFO L93 Difference]: Finished difference Result 3704 states and 12656 transitions. [2022-11-21 16:36:10,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 16:36:10,190 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 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 15 [2022-11-21 16:36:10,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:36:10,208 INFO L225 Difference]: With dead ends: 3704 [2022-11-21 16:36:10,209 INFO L226 Difference]: Without dead ends: 3704 [2022-11-21 16:36:10,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2022-11-21 16:36:10,210 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 866 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 866 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:36:10,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [866 Valid, 36 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-21 16:36:10,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3704 states. [2022-11-21 16:36:10,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3704 to 1965. [2022-11-21 16:36:10,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1965 states, 1960 states have (on average 3.8127551020408164) internal successors, (7473), 1964 states have internal predecessors, (7473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:36:10,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 7473 transitions. [2022-11-21 16:36:10,265 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 7473 transitions. Word has length 15 [2022-11-21 16:36:10,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:36:10,265 INFO L495 AbstractCegarLoop]: Abstraction has 1965 states and 7473 transitions. [2022-11-21 16:36:10,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 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) [2022-11-21 16:36:10,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 7473 transitions. [2022-11-21 16:36:10,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-21 16:36:10,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:36:10,269 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1] [2022-11-21 16:36:10,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:36:10,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:36:10,488 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-21 16:36:10,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:36:10,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1301339748, now seen corresponding path program 6 times [2022-11-21 16:36:10,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:36:10,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [292614673] [2022-11-21 16:36:10,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:36:10,489 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 [2022-11-21 16:36:10,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:36:10,490 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:36:10,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:36:10,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-21 16:36:10,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:36:10,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-21 16:36:10,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:36:11,126 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 16:36:11,126 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 [2022-11-21 16:36:11,818 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-21 16:36:11,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:36:13,121 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-21 16:36:13,122 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:36:13,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [292614673] [2022-11-21 16:36:13,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [292614673] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:36:13,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:36:13,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-11-21 16:36:13,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756413596] [2022-11-21 16:36:13,122 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:36:13,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-21 16:36:13,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:36:13,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-21 16:36:13,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-11-21 16:36:13,124 INFO L87 Difference]: Start difference. First operand 1965 states and 7473 transitions. Second operand has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:36:33,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:36:33,352 INFO L93 Difference]: Finished difference Result 4045 states and 14173 transitions. [2022-11-21 16:36:33,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-21 16:36:33,353 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 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 [2022-11-21 16:36:33,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:36:33,360 INFO L225 Difference]: With dead ends: 4045 [2022-11-21 16:36:33,361 INFO L226 Difference]: Without dead ends: 4045 [2022-11-21 16:36:33,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=438, Invalid=2112, Unknown=0, NotChecked=0, Total=2550 [2022-11-21 16:36:33,362 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 936 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 2826 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 936 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 2847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:36:33,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [936 Valid, 245 Invalid, 2847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2826 Invalid, 0 Unknown, 0 Unchecked, 14.1s Time] [2022-11-21 16:36:33,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4045 states. [2022-11-21 16:36:33,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4045 to 2815. [2022-11-21 16:36:33,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2815 states, 2810 states have (on average 3.7548042704626337) internal successors, (10551), 2814 states have internal predecessors, (10551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:36:33,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2815 states to 2815 states and 10551 transitions. [2022-11-21 16:36:33,465 INFO L78 Accepts]: Start accepts. Automaton has 2815 states and 10551 transitions. Word has length 19 [2022-11-21 16:36:33,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:36:33,465 INFO L495 AbstractCegarLoop]: Abstraction has 2815 states and 10551 transitions. [2022-11-21 16:36:33,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:36:33,466 INFO L276 IsEmpty]: Start isEmpty. Operand 2815 states and 10551 transitions. [2022-11-21 16:36:33,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-21 16:36:33,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:36:33,477 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:36:33,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-21 16:36:33,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:36:33,694 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-21 16:36:33,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:36:33,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1494517572, now seen corresponding path program 5 times [2022-11-21 16:36:33,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:36:33,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1916455104] [2022-11-21 16:36:33,695 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:36:33,696 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 [2022-11-21 16:36:33,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:36:33,698 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:36:33,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:36:33,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-21 16:36:33,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:36:33,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-21 16:36:33,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:36:34,143 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 16:36:34,143 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 [2022-11-21 16:36:34,986 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 16:36:34,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:36:38,889 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:36:38,889 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:36:38,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1916455104] [2022-11-21 16:36:38,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1916455104] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:36:38,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:36:38,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 30 [2022-11-21 16:36:38,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945489679] [2022-11-21 16:36:38,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:36:38,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-21 16:36:38,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:36:38,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-21 16:36:38,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2022-11-21 16:36:38,891 INFO L87 Difference]: Start difference. First operand 2815 states and 10551 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:37:11,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:37:11,154 INFO L93 Difference]: Finished difference Result 6118 states and 20164 transitions. [2022-11-21 16:37:11,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-21 16:37:11,157 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 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 [2022-11-21 16:37:11,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:37:11,168 INFO L225 Difference]: With dead ends: 6118 [2022-11-21 16:37:11,168 INFO L226 Difference]: Without dead ends: 6118 [2022-11-21 16:37:11,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=613, Invalid=2693, Unknown=0, NotChecked=0, Total=3306 [2022-11-21 16:37:11,169 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 1133 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 3635 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1133 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 3674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 3635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.6s IncrementalHoareTripleChecker+Time [2022-11-21 16:37:11,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1133 Valid, 269 Invalid, 3674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 3635 Invalid, 0 Unknown, 0 Unchecked, 18.6s Time] [2022-11-21 16:37:11,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6118 states. [2022-11-21 16:37:11,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6118 to 3120. [2022-11-21 16:37:11,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3120 states, 3115 states have (on average 3.7085072231139646) internal successors, (11552), 3119 states have internal predecessors, (11552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:37:11,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3120 states to 3120 states and 11552 transitions. [2022-11-21 16:37:11,287 INFO L78 Accepts]: Start accepts. Automaton has 3120 states and 11552 transitions. Word has length 20 [2022-11-21 16:37:11,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:37:11,287 INFO L495 AbstractCegarLoop]: Abstraction has 3120 states and 11552 transitions. [2022-11-21 16:37:11,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:37:11,288 INFO L276 IsEmpty]: Start isEmpty. Operand 3120 states and 11552 transitions. [2022-11-21 16:37:11,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-21 16:37:11,293 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:37:11,293 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1] [2022-11-21 16:37:11,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-21 16:37:11,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:37:11,507 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-21 16:37:11,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:37:11,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1261845116, now seen corresponding path program 7 times [2022-11-21 16:37:11,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:37:11,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1512560344] [2022-11-21 16:37:11,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 16:37:11,508 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 [2022-11-21 16:37:11,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:37:11,510 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:37:11,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:37:11,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:37:11,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-21 16:37:11,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:37:11,926 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 16:37:11,926 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 [2022-11-21 16:37:12,985 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 16:37:12,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:37:18,472 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:37:18,472 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:37:18,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1512560344] [2022-11-21 16:37:18,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1512560344] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:37:18,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:37:18,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 36 [2022-11-21 16:37:18,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592424644] [2022-11-21 16:37:18,473 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:37:18,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-21 16:37:18,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:37:18,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-21 16:37:18,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2022-11-21 16:37:18,474 INFO L87 Difference]: Start difference. First operand 3120 states and 11552 transitions. Second operand has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:38:06,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:38:06,294 INFO L93 Difference]: Finished difference Result 7725 states and 26917 transitions. [2022-11-21 16:38:06,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-21 16:38:06,296 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 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 [2022-11-21 16:38:06,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:38:06,314 INFO L225 Difference]: With dead ends: 7725 [2022-11-21 16:38:06,314 INFO L226 Difference]: Without dead ends: 7725 [2022-11-21 16:38:06,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1561 ImplicationChecksByTransitivity, 24.2s TimeCoverageRelationStatistics Valid=1142, Invalid=6514, Unknown=0, NotChecked=0, Total=7656 [2022-11-21 16:38:06,316 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 3022 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 9126 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3022 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 9194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 9126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:38:06,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3022 Valid, 717 Invalid, 9194 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [68 Valid, 9126 Invalid, 0 Unknown, 0 Unchecked, 29.0s Time] [2022-11-21 16:38:06,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7725 states. [2022-11-21 16:38:06,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7725 to 4113. [2022-11-21 16:38:06,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4113 states, 4108 states have (on average 3.7475657254138266) internal successors, (15395), 4112 states have internal predecessors, (15395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:38:06,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4113 states to 4113 states and 15395 transitions. [2022-11-21 16:38:06,571 INFO L78 Accepts]: Start accepts. Automaton has 4113 states and 15395 transitions. Word has length 21 [2022-11-21 16:38:06,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:38:06,571 INFO L495 AbstractCegarLoop]: Abstraction has 4113 states and 15395 transitions. [2022-11-21 16:38:06,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:38:06,572 INFO L276 IsEmpty]: Start isEmpty. Operand 4113 states and 15395 transitions. [2022-11-21 16:38:06,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-21 16:38:06,578 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:38:06,578 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:38:06,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:38:06,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:38:06,779 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-21 16:38:06,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:38:06,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1086444266, now seen corresponding path program 1 times [2022-11-21 16:38:06,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:38:06,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [498543192] [2022-11-21 16:38:06,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:38:06,780 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 [2022-11-21 16:38:06,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:38:06,781 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:38:06,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:38:07,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:38:07,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 16:38:07,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:38:07,035 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:38:07,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 19 [2022-11-21 16:38:07,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 16:38:07,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:38:07,187 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:38:07,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [498543192] [2022-11-21 16:38:07,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [498543192] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:38:07,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:38:07,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:38:07,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578577114] [2022-11-21 16:38:07,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:38:07,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:38:07,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:38:07,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:38:07,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:38:07,188 INFO L87 Difference]: Start difference. First operand 4113 states and 15395 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:38:07,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:38:07,732 INFO L93 Difference]: Finished difference Result 5386 states and 19641 transitions. [2022-11-21 16:38:07,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:38:07,733 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-21 16:38:07,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:38:07,749 INFO L225 Difference]: With dead ends: 5386 [2022-11-21 16:38:07,750 INFO L226 Difference]: Without dead ends: 5209 [2022-11-21 16:38:07,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:38:07,750 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:38:07,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 10 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-21 16:38:07,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5209 states. [2022-11-21 16:38:07,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5209 to 5087. [2022-11-21 16:38:07,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5087 states, 5082 states have (on average 3.6438410074773713) internal successors, (18518), 5086 states have internal predecessors, (18518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:38:07,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5087 states to 5087 states and 18518 transitions. [2022-11-21 16:38:07,950 INFO L78 Accepts]: Start accepts. Automaton has 5087 states and 18518 transitions. Word has length 22 [2022-11-21 16:38:07,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:38:07,951 INFO L495 AbstractCegarLoop]: Abstraction has 5087 states and 18518 transitions. [2022-11-21 16:38:07,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:38:07,951 INFO L276 IsEmpty]: Start isEmpty. Operand 5087 states and 18518 transitions. [2022-11-21 16:38:07,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-21 16:38:07,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:38:07,958 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:38:07,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-21 16:38:08,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:38:08,171 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-21 16:38:08,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:38:08,171 INFO L85 PathProgramCache]: Analyzing trace with hash -568045180, now seen corresponding path program 2 times [2022-11-21 16:38:08,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:38:08,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542449039] [2022-11-21 16:38:08,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:38:08,172 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 [2022-11-21 16:38:08,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:38:08,173 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:38:08,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:38:08,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:38:08,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:38:08,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-21 16:38:08,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:38:08,426 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:38:08,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 19 [2022-11-21 16:38:08,549 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:38:08,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 160 treesize of output 55 [2022-11-21 16:38:08,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:38:08,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:38:11,002 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:38:11,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 145 treesize of output 40 [2022-11-21 16:38:13,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 16:38:13,156 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:38:13,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542449039] [2022-11-21 16:38:13,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542449039] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-21 16:38:13,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:38:13,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-21 16:38:13,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203646327] [2022-11-21 16:38:13,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:38:13,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:38:13,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:38:13,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:38:13,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2022-11-21 16:38:13,159 INFO L87 Difference]: Start difference. First operand 5087 states and 18518 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:38:15,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:38:15,504 INFO L93 Difference]: Finished difference Result 5086 states and 18517 transitions. [2022-11-21 16:38:15,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:38:15,506 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-21 16:38:15,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:38:15,529 INFO L225 Difference]: With dead ends: 5086 [2022-11-21 16:38:15,529 INFO L226 Difference]: Without dead ends: 4570 [2022-11-21 16:38:15,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=19, Invalid=35, Unknown=2, NotChecked=0, Total=56 [2022-11-21 16:38:15,530 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 18 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:38:15,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 6 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:38:15,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4570 states. [2022-11-21 16:38:15,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4570 to 3538. [2022-11-21 16:38:15,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3538 states, 3534 states have (on average 3.5220713073005094) internal successors, (12447), 3537 states have internal predecessors, (12447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:38:15,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3538 states to 3538 states and 12447 transitions. [2022-11-21 16:38:15,653 INFO L78 Accepts]: Start accepts. Automaton has 3538 states and 12447 transitions. Word has length 22 [2022-11-21 16:38:15,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:38:15,653 INFO L495 AbstractCegarLoop]: Abstraction has 3538 states and 12447 transitions. [2022-11-21 16:38:15,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:38:15,654 INFO L276 IsEmpty]: Start isEmpty. Operand 3538 states and 12447 transitions. [2022-11-21 16:38:15,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-21 16:38:15,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:38:15,657 INFO L195 NwaCegarLoop]: trace histogram [11, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:38:15,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:38:15,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:38:15,871 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-21 16:38:15,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:38:15,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1033335928, now seen corresponding path program 6 times [2022-11-21 16:38:15,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:38:15,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [950179129] [2022-11-21 16:38:15,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:38:15,873 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 [2022-11-21 16:38:15,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:38:15,874 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:38:15,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:38:16,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-21 16:38:16,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:38:16,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-21 16:38:16,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:38:16,638 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 16:38:16,638 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 17 treesize of output 44 [2022-11-21 16:38:17,917 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 54 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-21 16:38:17,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:38:24,185 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 38 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-21 16:38:24,185 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:38:24,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [950179129] [2022-11-21 16:38:24,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [950179129] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:38:24,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:38:24,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2022-11-21 16:38:24,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408773591] [2022-11-21 16:38:24,186 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:38:24,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-21 16:38:24,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:38:24,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-21 16:38:24,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-11-21 16:38:24,187 INFO L87 Difference]: Start difference. First operand 3538 states and 12447 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 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) [2022-11-21 16:38:34,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:38:34,201 INFO L93 Difference]: Finished difference Result 3398 states and 11927 transitions. [2022-11-21 16:38:34,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 16:38:34,203 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 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 22 [2022-11-21 16:38:34,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:38:34,214 INFO L225 Difference]: With dead ends: 3398 [2022-11-21 16:38:34,214 INFO L226 Difference]: Without dead ends: 3107 [2022-11-21 16:38:34,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2022-11-21 16:38:34,215 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 150 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-21 16:38:34,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 63 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-11-21 16:38:34,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2022-11-21 16:38:34,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 3107. [2022-11-21 16:38:34,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3107 states, 3103 states have (on average 3.5981308411214954) internal successors, (11165), 3106 states have internal predecessors, (11165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:38:34,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3107 states to 3107 states and 11165 transitions. [2022-11-21 16:38:34,296 INFO L78 Accepts]: Start accepts. Automaton has 3107 states and 11165 transitions. Word has length 22 [2022-11-21 16:38:34,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:38:34,296 INFO L495 AbstractCegarLoop]: Abstraction has 3107 states and 11165 transitions. [2022-11-21 16:38:34,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 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) [2022-11-21 16:38:34,296 INFO L276 IsEmpty]: Start isEmpty. Operand 3107 states and 11165 transitions. [2022-11-21 16:38:34,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-21 16:38:34,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:38:34,300 INFO L195 NwaCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:38:34,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:38:34,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:38:34,515 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-21 16:38:34,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:38:34,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1289794129, now seen corresponding path program 7 times [2022-11-21 16:38:34,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:38:34,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1169687452] [2022-11-21 16:38:34,516 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 16:38:34,516 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 [2022-11-21 16:38:34,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:38:34,517 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:38:34,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:38:34,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:38:34,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-21 16:38:34,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:38:35,000 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 16:38:35,000 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 [2022-11-21 16:38:36,193 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 16:38:36,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:38:43,187 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:38:43,188 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:38:43,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1169687452] [2022-11-21 16:38:43,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1169687452] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:38:43,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:38:43,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 35 [2022-11-21 16:38:43,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385285208] [2022-11-21 16:38:43,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:38:43,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-21 16:38:43,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:38:43,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-21 16:38:43,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1095, Unknown=0, NotChecked=0, Total=1260 [2022-11-21 16:38:43,190 INFO L87 Difference]: Start difference. First operand 3107 states and 11165 transitions. Second operand has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 35 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:39:18,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:39:18,565 INFO L93 Difference]: Finished difference Result 4883 states and 16405 transitions. [2022-11-21 16:39:18,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-21 16:39:18,568 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 35 states have internal predecessors, (44), 0 states have call successors, (0), 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 23 [2022-11-21 16:39:18,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:39:18,582 INFO L225 Difference]: With dead ends: 4883 [2022-11-21 16:39:18,582 INFO L226 Difference]: Without dead ends: 4462 [2022-11-21 16:39:18,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=522, Invalid=2784, Unknown=0, NotChecked=0, Total=3306 [2022-11-21 16:39:18,583 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 743 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 2908 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 2937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.7s IncrementalHoareTripleChecker+Time [2022-11-21 16:39:18,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [743 Valid, 258 Invalid, 2937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2908 Invalid, 0 Unknown, 0 Unchecked, 20.7s Time] [2022-11-21 16:39:18,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4462 states. [2022-11-21 16:39:18,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4462 to 2818. [2022-11-21 16:39:18,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2818 states, 2814 states have (on average 3.7117981520966596) internal successors, (10445), 2817 states have internal predecessors, (10445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:39:18,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2818 states to 2818 states and 10445 transitions. [2022-11-21 16:39:18,662 INFO L78 Accepts]: Start accepts. Automaton has 2818 states and 10445 transitions. Word has length 23 [2022-11-21 16:39:18,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:39:18,662 INFO L495 AbstractCegarLoop]: Abstraction has 2818 states and 10445 transitions. [2022-11-21 16:39:18,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 35 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:39:18,662 INFO L276 IsEmpty]: Start isEmpty. Operand 2818 states and 10445 transitions. [2022-11-21 16:39:18,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-21 16:39:18,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:39:18,665 INFO L195 NwaCegarLoop]: trace histogram [11, 7, 1, 1, 1, 1, 1] [2022-11-21 16:39:18,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:39:18,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:39:18,880 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-21 16:39:18,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:39:18,881 INFO L85 PathProgramCache]: Analyzing trace with hash -718946221, now seen corresponding path program 8 times [2022-11-21 16:39:18,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:39:18,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [249887130] [2022-11-21 16:39:18,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:39:18,881 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 [2022-11-21 16:39:18,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:39:18,882 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:39:18,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:39:19,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:39:19,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:39:19,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-21 16:39:19,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:39:19,316 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 16:39:19,316 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 [2022-11-21 16:39:20,805 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 32 proven. 56 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 16:39:20,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:39:29,290 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:39:29,291 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:39:29,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [249887130] [2022-11-21 16:39:29,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [249887130] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:39:29,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:39:29,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 39 [2022-11-21 16:39:29,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931994899] [2022-11-21 16:39:29,291 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:39:29,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-21 16:39:29,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:39:29,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-21 16:39:29,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1394, Unknown=0, NotChecked=0, Total=1560 [2022-11-21 16:39:29,292 INFO L87 Difference]: Start difference. First operand 2818 states and 10445 transitions. Second operand has 40 states, 40 states have (on average 1.1) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:39:48,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:39:48,974 INFO L93 Difference]: Finished difference Result 4122 states and 13667 transitions. [2022-11-21 16:39:48,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-21 16:39:48,975 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.1) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 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 23 [2022-11-21 16:39:48,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:39:48,984 INFO L225 Difference]: With dead ends: 4122 [2022-11-21 16:39:48,984 INFO L226 Difference]: Without dead ends: 4062 [2022-11-21 16:39:48,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=517, Invalid=2905, Unknown=0, NotChecked=0, Total=3422 [2022-11-21 16:39:48,986 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 1188 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 4406 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1188 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 4443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 4406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:39:48,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1188 Valid, 383 Invalid, 4443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 4406 Invalid, 0 Unknown, 0 Unchecked, 13.0s Time] [2022-11-21 16:39:48,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4062 states. [2022-11-21 16:39:49,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4062 to 2598. [2022-11-21 16:39:49,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2598 states, 2594 states have (on average 3.5092521202775635) internal successors, (9103), 2597 states have internal predecessors, (9103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:39:49,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2598 states to 2598 states and 9103 transitions. [2022-11-21 16:39:49,051 INFO L78 Accepts]: Start accepts. Automaton has 2598 states and 9103 transitions. Word has length 23 [2022-11-21 16:39:49,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:39:49,052 INFO L495 AbstractCegarLoop]: Abstraction has 2598 states and 9103 transitions. [2022-11-21 16:39:49,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.1) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:39:49,053 INFO L276 IsEmpty]: Start isEmpty. Operand 2598 states and 9103 transitions. [2022-11-21 16:39:49,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-21 16:39:49,055 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:39:49,055 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 1, 1, 1, 1, 1] [2022-11-21 16:39:49,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:39:49,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:39:49,270 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-21 16:39:49,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:39:49,271 INFO L85 PathProgramCache]: Analyzing trace with hash 828728484, now seen corresponding path program 9 times [2022-11-21 16:39:49,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:39:49,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1221293063] [2022-11-21 16:39:49,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:39:49,271 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 [2022-11-21 16:39:49,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:39:49,272 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:39:49,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:39:50,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-21 16:39:50,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:39:50,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-21 16:39:50,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:39:50,350 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 16:39:50,350 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 17 treesize of output 44 [2022-11-21 16:39:52,331 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:39:52,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:39:59,311 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:39:59,311 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:39:59,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1221293063] [2022-11-21 16:39:59,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1221293063] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:39:59,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:39:59,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 41 [2022-11-21 16:39:59,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184169238] [2022-11-21 16:39:59,312 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:39:59,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-21 16:39:59,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:39:59,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-21 16:39:59,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1503, Unknown=0, NotChecked=0, Total=1722 [2022-11-21 16:39:59,314 INFO L87 Difference]: Start difference. First operand 2598 states and 9103 transitions. Second operand has 42 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 41 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:40:54,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:41:36,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:41:36,369 INFO L93 Difference]: Finished difference Result 7166 states and 22753 transitions. [2022-11-21 16:41:36,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-21 16:41:36,372 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 41 states have internal predecessors, (45), 0 states have call successors, (0), 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 23 [2022-11-21 16:41:36,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:41:36,386 INFO L225 Difference]: With dead ends: 7166 [2022-11-21 16:41:36,386 INFO L226 Difference]: Without dead ends: 7040 [2022-11-21 16:41:36,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1268 ImplicationChecksByTransitivity, 50.8s TimeCoverageRelationStatistics Valid=930, Invalid=5390, Unknown=0, NotChecked=0, Total=6320 [2022-11-21 16:41:36,387 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1579 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 7237 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1579 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 7283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 7237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.9s IncrementalHoareTripleChecker+Time [2022-11-21 16:41:36,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1579 Valid, 674 Invalid, 7283 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [46 Valid, 7237 Invalid, 0 Unknown, 0 Unchecked, 53.9s Time] [2022-11-21 16:41:36,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7040 states. [2022-11-21 16:41:36,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7040 to 3592. [2022-11-21 16:41:36,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3592 states, 3588 states have (on average 3.4094202898550723) internal successors, (12233), 3591 states have internal predecessors, (12233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:41:36,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3592 states to 3592 states and 12233 transitions. [2022-11-21 16:41:36,470 INFO L78 Accepts]: Start accepts. Automaton has 3592 states and 12233 transitions. Word has length 23 [2022-11-21 16:41:36,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:41:36,470 INFO L495 AbstractCegarLoop]: Abstraction has 3592 states and 12233 transitions. [2022-11-21 16:41:36,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 41 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:41:36,471 INFO L276 IsEmpty]: Start isEmpty. Operand 3592 states and 12233 transitions. [2022-11-21 16:41:36,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-21 16:41:36,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:41:36,474 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1] [2022-11-21 16:41:36,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:41:36,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:41:36,676 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-21 16:41:36,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:41:36,676 INFO L85 PathProgramCache]: Analyzing trace with hash 374723425, now seen corresponding path program 4 times [2022-11-21 16:41:36,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:41:36,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [439191940] [2022-11-21 16:41:36,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:41:36,676 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 [2022-11-21 16:41:36,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:41:36,677 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:41:36,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:41:36,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:41:36,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:41:36,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-21 16:41:36,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:41:37,099 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 16:41:37,100 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 [2022-11-21 16:41:39,187 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:41:39,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:41:54,055 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:41:54,056 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:41:54,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [439191940] [2022-11-21 16:41:54,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [439191940] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:41:54,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:41:54,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2022-11-21 16:41:54,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110774900] [2022-11-21 16:41:54,056 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:41:54,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-21 16:41:54,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:41:54,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-21 16:41:54,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1634, Unknown=0, NotChecked=0, Total=2256 [2022-11-21 16:41:54,058 INFO L87 Difference]: Start difference. First operand 3592 states and 12233 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) [2022-11-21 16:42:29,747 WARN L233 SmtUtils]: Spent 24.44s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:42:51,043 WARN L233 SmtUtils]: Spent 19.01s on a formula simplification that was a NOOP. DAG size: 243 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:43:09,761 WARN L233 SmtUtils]: Spent 16.50s on a formula simplification that was a NOOP. DAG size: 232 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:43:26,861 WARN L233 SmtUtils]: Spent 14.92s on a formula simplification that was a NOOP. DAG size: 222 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:43:35,709 WARN L233 SmtUtils]: Spent 6.59s on a formula simplification that was a NOOP. DAG size: 211 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:43:45,049 WARN L233 SmtUtils]: Spent 7.05s on a formula simplification that was a NOOP. DAG size: 200 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:43:54,258 WARN L233 SmtUtils]: Spent 6.85s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:44:01,763 WARN L233 SmtUtils]: Spent 5.16s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:44:10,189 WARN L233 SmtUtils]: Spent 5.99s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:44:18,388 WARN L233 SmtUtils]: Spent 5.64s on a formula simplification that was a NOOP. DAG size: 157 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:45:00,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:45:00,907 INFO L93 Difference]: Finished difference Result 47650 states and 182935 transitions. [2022-11-21 16:45:00,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-21 16:45:00,909 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 24 [2022-11-21 16:45:00,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:45:01,083 INFO L225 Difference]: With dead ends: 47650 [2022-11-21 16:45:01,083 INFO L226 Difference]: Without dead ends: 47650 [2022-11-21 16:45:01,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 167.5s TimeCoverageRelationStatistics Valid=1678, Invalid=3152, Unknown=0, NotChecked=0, Total=4830 [2022-11-21 16:45:01,085 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 8277 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 7008 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8277 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 7056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 7008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.8s IncrementalHoareTripleChecker+Time [2022-11-21 16:45:01,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8277 Valid, 824 Invalid, 7056 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [48 Valid, 7008 Invalid, 0 Unknown, 0 Unchecked, 33.8s Time] [2022-11-21 16:45:01,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47650 states. [2022-11-21 16:45:01,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47650 to 3616. [2022-11-21 16:45:01,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3616 states, 3612 states have (on average 3.4000553709856036) internal successors, (12281), 3615 states have internal predecessors, (12281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:01,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3616 states to 3616 states and 12281 transitions. [2022-11-21 16:45:01,896 INFO L78 Accepts]: Start accepts. Automaton has 3616 states and 12281 transitions. Word has length 24 [2022-11-21 16:45:01,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:45:01,896 INFO L495 AbstractCegarLoop]: Abstraction has 3616 states and 12281 transitions. [2022-11-21 16:45:01,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2022-11-21 16:45:01,897 INFO L276 IsEmpty]: Start isEmpty. Operand 3616 states and 12281 transitions. [2022-11-21 16:45:01,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-21 16:45:01,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:45:01,901 INFO L195 NwaCegarLoop]: trace histogram [12, 6, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:45:01,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:45:02,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:45:02,115 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-21 16:45:02,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:02,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1322863715, now seen corresponding path program 8 times [2022-11-21 16:45:02,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:45:02,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [915681596] [2022-11-21 16:45:02,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:45:02,117 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 [2022-11-21 16:45:02,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:45:02,117 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:45:02,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:45:02,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:45:02,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:45:02,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-21 16:45:02,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:45:02,695 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 16:45:02,696 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 [2022-11-21 16:45:04,030 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 40 proven. 49 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-21 16:45:04,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:45:12,151 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:45:12,151 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:45:12,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [915681596] [2022-11-21 16:45:12,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [915681596] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:45:12,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:45:12,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 38 [2022-11-21 16:45:12,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435261242] [2022-11-21 16:45:12,152 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:45:12,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-21 16:45:12,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:45:12,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-21 16:45:12,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1313, Unknown=0, NotChecked=0, Total=1482 [2022-11-21 16:45:12,154 INFO L87 Difference]: Start difference. First operand 3616 states and 12281 transitions. Second operand has 39 states, 39 states have (on average 1.205128205128205) internal successors, (47), 38 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:56,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:45:56,308 INFO L93 Difference]: Finished difference Result 4156 states and 14003 transitions. [2022-11-21 16:45:56,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-21 16:45:56,310 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.205128205128205) internal successors, (47), 38 states have internal predecessors, (47), 0 states have call successors, (0), 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 25 [2022-11-21 16:45:56,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:45:56,316 INFO L225 Difference]: With dead ends: 4156 [2022-11-21 16:45:56,316 INFO L226 Difference]: Without dead ends: 3627 [2022-11-21 16:45:56,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 28.0s TimeCoverageRelationStatistics Valid=545, Invalid=3237, Unknown=0, NotChecked=0, Total=3782 [2022-11-21 16:45:56,317 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 655 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 3142 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 3170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 3142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.4s IncrementalHoareTripleChecker+Time [2022-11-21 16:45:56,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [655 Valid, 326 Invalid, 3170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 3142 Invalid, 0 Unknown, 0 Unchecked, 24.4s Time] [2022-11-21 16:45:56,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3627 states. [2022-11-21 16:45:56,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3627 to 3219. [2022-11-21 16:45:56,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3219 states, 3215 states have (on average 3.4559875583203734) internal successors, (11111), 3218 states have internal predecessors, (11111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:56,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3219 states to 3219 states and 11111 transitions. [2022-11-21 16:45:56,367 INFO L78 Accepts]: Start accepts. Automaton has 3219 states and 11111 transitions. Word has length 25 [2022-11-21 16:45:56,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:45:56,367 INFO L495 AbstractCegarLoop]: Abstraction has 3219 states and 11111 transitions. [2022-11-21 16:45:56,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.205128205128205) internal successors, (47), 38 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:56,367 INFO L276 IsEmpty]: Start isEmpty. Operand 3219 states and 11111 transitions. [2022-11-21 16:45:56,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-21 16:45:56,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:45:56,370 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:45:56,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-21 16:45:56,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:45:56,570 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-21 16:45:56,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:56,570 INFO L85 PathProgramCache]: Analyzing trace with hash -608792861, now seen corresponding path program 9 times [2022-11-21 16:45:56,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:45:56,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [756358184] [2022-11-21 16:45:56,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:45:56,571 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 [2022-11-21 16:45:56,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:45:56,572 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:45:56,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338590e1-29bf-4746-a7b6-58ae20089b76/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:45:57,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-21 16:45:57,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:45:57,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-21 16:45:57,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:45:57,879 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 16:45:57,880 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 [2022-11-21 16:45:59,755 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:45:59,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:46:11,674 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:46:11,674 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:46:11,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [756358184] [2022-11-21 16:46:11,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [756358184] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:46:11,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:46:11,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2022-11-21 16:46:11,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336300332] [2022-11-21 16:46:11,675 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:46:11,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-21 16:46:11,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:46:11,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-21 16:46:11,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1528, Unknown=0, NotChecked=0, Total=1806 [2022-11-21 16:46:11,676 INFO L87 Difference]: Start difference. First operand 3219 states and 11111 transitions. Second operand has 43 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)