./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0234-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0234-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 2e40f9e7b474ba5b84186650c7060a1f3eed5394bab52ac2eaa493135efa417c --- 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 09:06:46,787 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 09:06:46,789 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 09:06:46,815 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 09:06:46,831 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 09:06:46,833 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 09:06:46,835 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 09:06:46,844 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 09:06:46,846 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 09:06:46,847 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 09:06:46,850 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 09:06:46,852 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 09:06:46,854 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 09:06:46,858 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 09:06:46,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 09:06:46,864 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 09:06:46,866 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 09:06:46,872 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 09:06:46,874 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 09:06:46,876 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 09:06:46,880 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 09:06:46,882 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 09:06:46,884 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 09:06:46,886 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 09:06:46,890 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 09:06:46,899 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 09:06:46,899 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 09:06:46,900 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 09:06:46,901 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 09:06:46,902 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 09:06:46,904 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 09:06:46,905 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 09:06:46,907 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 09:06:46,908 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 09:06:46,910 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 09:06:46,912 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 09:06:46,913 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 09:06:46,914 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 09:06:46,915 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 09:06:46,916 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 09:06:46,918 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 09:06:46,921 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-21 09:06:46,968 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 09:06:46,982 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 09:06:46,985 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 09:06:46,985 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 09:06:46,986 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 09:06:46,986 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 09:06:46,987 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 09:06:46,988 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 09:06:46,988 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 09:06:46,988 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 09:06:46,990 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 09:06:46,990 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-21 09:06:46,990 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 09:06:46,991 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 09:06:46,991 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 09:06:46,991 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-21 09:06:46,991 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-21 09:06:46,992 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-21 09:06:46,992 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 09:06:46,992 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-21 09:06:46,992 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 09:06:46,993 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 09:06:46,993 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 09:06:46,994 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 09:06:46,994 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 09:06:46,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 09:06:46,995 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 09:06:46,995 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 09:06:46,996 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 09:06:46,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 09:06:46,996 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_4243d59e-1672-4b7e-89a2-d6fb92890c94/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e40f9e7b474ba5b84186650c7060a1f3eed5394bab52ac2eaa493135efa417c [2022-11-21 09:06:47,347 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 09:06:47,381 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 09:06:47,384 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 09:06:47,386 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 09:06:47,388 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 09:06:47,390 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/memsafety/test-0234-1.i [2022-11-21 09:06:51,122 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 09:06:51,539 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 09:06:51,545 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/sv-benchmarks/c/memsafety/test-0234-1.i [2022-11-21 09:06:51,570 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/data/01f76fd0d/068599d83dc942fbbcd32ea5549a8bba/FLAG60ab8371d [2022-11-21 09:06:51,597 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/data/01f76fd0d/068599d83dc942fbbcd32ea5549a8bba [2022-11-21 09:06:51,600 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 09:06:51,602 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 09:06:51,606 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 09:06:51,606 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 09:06:51,610 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 09:06:51,611 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:06:51" (1/1) ... [2022-11-21 09:06:51,612 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60ef0b1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:06:51, skipping insertion in model container [2022-11-21 09:06:51,612 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:06:51" (1/1) ... [2022-11-21 09:06:51,621 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 09:06:51,698 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 09:06:52,277 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 09:06:52,292 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 09:06:52,336 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 09:06:52,367 INFO L208 MainTranslator]: Completed translation [2022-11-21 09:06:52,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:06:52 WrapperNode [2022-11-21 09:06:52,368 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 09:06:52,369 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 09:06:52,369 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 09:06:52,369 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 09:06:52,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:06:52" (1/1) ... [2022-11-21 09:06:52,393 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:06:52" (1/1) ... [2022-11-21 09:06:52,420 INFO L138 Inliner]: procedures = 188, calls = 60, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 203 [2022-11-21 09:06:52,421 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 09:06:52,422 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 09:06:52,422 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 09:06:52,422 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 09:06:52,434 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:06:52" (1/1) ... [2022-11-21 09:06:52,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:06:52" (1/1) ... [2022-11-21 09:06:52,442 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:06:52" (1/1) ... [2022-11-21 09:06:52,442 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:06:52" (1/1) ... [2022-11-21 09:06:52,464 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:06:52" (1/1) ... [2022-11-21 09:06:52,476 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:06:52" (1/1) ... [2022-11-21 09:06:52,484 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:06:52" (1/1) ... [2022-11-21 09:06:52,486 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:06:52" (1/1) ... [2022-11-21 09:06:52,488 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 09:06:52,489 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 09:06:52,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 09:06:52,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 09:06:52,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:06:52" (1/1) ... [2022-11-21 09:06:52,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 09:06:52,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:52,522 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 09:06:52,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 09:06:52,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-21 09:06:52,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 09:06:52,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-21 09:06:52,571 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-21 09:06:52,571 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2022-11-21 09:06:52,571 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2022-11-21 09:06:52,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 09:06:52,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-21 09:06:52,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 09:06:52,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 09:06:52,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 09:06:52,776 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 09:06:52,778 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 09:06:53,499 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 09:06:53,516 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 09:06:53,516 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-21 09:06:53,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:06:53 BoogieIcfgContainer [2022-11-21 09:06:53,519 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 09:06:53,522 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 09:06:53,522 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 09:06:53,528 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 09:06:53,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 09:06:51" (1/3) ... [2022-11-21 09:06:53,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@141ff379 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:06:53, skipping insertion in model container [2022-11-21 09:06:53,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:06:52" (2/3) ... [2022-11-21 09:06:53,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@141ff379 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:06:53, skipping insertion in model container [2022-11-21 09:06:53,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:06:53" (3/3) ... [2022-11-21 09:06:53,536 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0234-1.i [2022-11-21 09:06:53,558 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 09:06:53,558 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 75 error locations. [2022-11-21 09:06:53,637 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 09:06:53,646 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;@4252f453, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 09:06:53,647 INFO L358 AbstractCegarLoop]: Starting to check reachability of 75 error locations. [2022-11-21 09:06:53,653 INFO L276 IsEmpty]: Start isEmpty. Operand has 191 states, 108 states have (on average 1.8981481481481481) internal successors, (205), 183 states have internal predecessors, (205), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 09:06:53,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-21 09:06:53,662 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:06:53,663 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-21 09:06:53,663 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-21 09:06:53,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:53,673 INFO L85 PathProgramCache]: Analyzing trace with hash 930118, now seen corresponding path program 1 times [2022-11-21 09:06:53,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:53,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697565856] [2022-11-21 09:06:53,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:53,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:53,842 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 09:06:53,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:53,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697565856] [2022-11-21 09:06:53,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697565856] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:06:53,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:06:53,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 09:06:53,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669748679] [2022-11-21 09:06:53,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:06:53,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 09:06:53,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:53,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 09:06:53,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 09:06:53,903 INFO L87 Difference]: Start difference. First operand has 191 states, 108 states have (on average 1.8981481481481481) internal successors, (205), 183 states have internal predecessors, (205), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:53,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:06:53,947 INFO L93 Difference]: Finished difference Result 191 states and 206 transitions. [2022-11-21 09:06:53,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 09:06:53,949 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-21 09:06:53,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:06:53,959 INFO L225 Difference]: With dead ends: 191 [2022-11-21 09:06:53,959 INFO L226 Difference]: Without dead ends: 189 [2022-11-21 09:06:53,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 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 09:06:53,964 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 09:06:53,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 09:06:53,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-11-21 09:06:54,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-11-21 09:06:54,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 107 states have (on average 1.794392523364486) internal successors, (192), 181 states have internal predecessors, (192), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 09:06:54,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 204 transitions. [2022-11-21 09:06:54,014 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 204 transitions. Word has length 4 [2022-11-21 09:06:54,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:06:54,015 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 204 transitions. [2022-11-21 09:06:54,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:54,015 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 204 transitions. [2022-11-21 09:06:54,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-21 09:06:54,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:06:54,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-21 09:06:54,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 09:06:54,017 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-21 09:06:54,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:54,018 INFO L85 PathProgramCache]: Analyzing trace with hash 889842618, now seen corresponding path program 1 times [2022-11-21 09:06:54,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:54,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441407189] [2022-11-21 09:06:54,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:54,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:54,035 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 09:06:54,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [383682878] [2022-11-21 09:06:54,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:54,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:54,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:54,039 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:06:54,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 09:06:54,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:54,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 09:06:54,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:06:54,266 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 09:06:54,280 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 09:06:54,280 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 09:06:54,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:54,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441407189] [2022-11-21 09:06:54,282 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 09:06:54,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383682878] [2022-11-21 09:06:54,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383682878] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:06:54,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:06:54,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 09:06:54,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73692160] [2022-11-21 09:06:54,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:06:54,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 09:06:54,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:54,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 09:06:54,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 09:06:54,295 INFO L87 Difference]: Start difference. First operand 189 states and 204 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:54,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:06:54,543 INFO L93 Difference]: Finished difference Result 188 states and 203 transitions. [2022-11-21 09:06:54,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 09:06:54,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 09:06:54,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:06:54,555 INFO L225 Difference]: With dead ends: 188 [2022-11-21 09:06:54,555 INFO L226 Difference]: Without dead ends: 188 [2022-11-21 09:06:54,557 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 09:06:54,559 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 9 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 09:06:54,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 316 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 09:06:54,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-11-21 09:06:54,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2022-11-21 09:06:54,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 107 states have (on average 1.7850467289719627) internal successors, (191), 180 states have internal predecessors, (191), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 09:06:54,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 203 transitions. [2022-11-21 09:06:54,576 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 203 transitions. Word has length 6 [2022-11-21 09:06:54,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:06:54,576 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 203 transitions. [2022-11-21 09:06:54,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:54,577 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 203 transitions. [2022-11-21 09:06:54,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-21 09:06:54,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:06:54,578 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:06:54,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 09:06:54,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:54,785 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-21 09:06:54,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:54,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1815317712, now seen corresponding path program 1 times [2022-11-21 09:06:54,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:54,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516840612] [2022-11-21 09:06:54,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:54,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:54,801 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 09:06:54,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [383256803] [2022-11-21 09:06:54,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:54,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:54,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:54,804 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:06:54,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 09:06:54,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:54,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 09:06:54,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:06:54,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-21 09:06:55,000 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 09:06:55,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 09:06:55,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:55,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516840612] [2022-11-21 09:06:55,001 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 09:06:55,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383256803] [2022-11-21 09:06:55,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383256803] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:06:55,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:06:55,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 09:06:55,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969609814] [2022-11-21 09:06:55,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:06:55,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 09:06:55,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:55,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 09:06:55,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 09:06:55,005 INFO L87 Difference]: Start difference. First operand 188 states and 203 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:55,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:06:55,223 INFO L93 Difference]: Finished difference Result 197 states and 212 transitions. [2022-11-21 09:06:55,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 09:06:55,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 09:06:55,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:06:55,226 INFO L225 Difference]: With dead ends: 197 [2022-11-21 09:06:55,226 INFO L226 Difference]: Without dead ends: 197 [2022-11-21 09:06:55,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 09:06:55,228 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 16 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 09:06:55,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 519 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 09:06:55,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-11-21 09:06:55,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2022-11-21 09:06:55,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 115 states have (on average 1.7391304347826086) internal successors, (200), 188 states have internal predecessors, (200), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 09:06:55,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 212 transitions. [2022-11-21 09:06:55,244 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 212 transitions. Word has length 7 [2022-11-21 09:06:55,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:06:55,245 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 212 transitions. [2022-11-21 09:06:55,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:55,246 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 212 transitions. [2022-11-21 09:06:55,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-21 09:06:55,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:06:55,248 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:06:55,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 09:06:55,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:55,455 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-21 09:06:55,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:55,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1660157209, now seen corresponding path program 1 times [2022-11-21 09:06:55,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:55,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637983110] [2022-11-21 09:06:55,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:55,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:55,491 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 09:06:55,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [732694942] [2022-11-21 09:06:55,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:55,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:55,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:55,494 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:06:55,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 09:06:55,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:55,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-21 09:06:55,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:06:55,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 09:06:55,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 09:06:58,249 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 48 treesize of output 42 [2022-11-21 09:07:02,955 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-21 09:07:02,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 09:07:02,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:07:02,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637983110] [2022-11-21 09:07:02,955 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 09:07:02,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732694942] [2022-11-21 09:07:02,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732694942] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:07:02,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:07:02,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 09:07:02,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161317069] [2022-11-21 09:07:02,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:07:02,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 09:07:02,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:07:02,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 09:07:02,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=11, Unknown=2, NotChecked=0, Total=20 [2022-11-21 09:07:02,958 INFO L87 Difference]: Start difference. First operand 197 states and 212 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-21 09:07:04,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-21 09:07:07,179 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse1 (= |c_zalloc_or_die_#Ultimate.C_memset_#amount#1| 0)) (.cse2 (<= |c_zalloc_or_die_#in~size#1| 0))) (and (= |c_zalloc_or_die_#Ultimate.C_memset_#t~loopctr34#1| 0) (or (exists ((|zalloc_or_die_calloc_model_~size#1| Int)) (let ((.cse0 (div |c_zalloc_or_die_#Ultimate.C_memset_#amount#1| |zalloc_or_die_calloc_model_~size#1|))) (and (= (mod |c_zalloc_or_die_#Ultimate.C_memset_#amount#1| |zalloc_or_die_calloc_model_~size#1|) 0) (not (= |zalloc_or_die_calloc_model_~size#1| 0)) (<= 1 .cse0) (<= |c_zalloc_or_die_#Ultimate.C_memset_#amount#1| (mod (* .cse0 |zalloc_or_die_calloc_model_~size#1|) 4294967296)) (<= |c_zalloc_or_die_#in~size#1| |zalloc_or_die_calloc_model_~size#1|)))) (and .cse1 .cse2)) (let ((.cse3 (select |c_#length| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|))) (or (exists ((|zalloc_or_die_calloc_model_~size#1| Int)) (let ((.cse4 (div |c_zalloc_or_die_#Ultimate.C_memset_#amount#1| |zalloc_or_die_calloc_model_~size#1|))) (and (<= .cse3 (mod (* .cse4 |zalloc_or_die_calloc_model_~size#1|) 4294967296)) (= (mod |c_zalloc_or_die_#Ultimate.C_memset_#amount#1| |zalloc_or_die_calloc_model_~size#1|) 0) (not (= |zalloc_or_die_calloc_model_~size#1| 0)) (<= 1 .cse4) (<= |c_zalloc_or_die_#in~size#1| |zalloc_or_die_calloc_model_~size#1|)))) (and .cse1 .cse2 (<= .cse3 0)))))) is different from true [2022-11-21 09:07:09,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-21 09:07:09,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=9, Invalid=12, Unknown=3, NotChecked=6, Total=30 [2022-11-21 09:07:09,517 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-21 09:07:09,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 139 [2022-11-21 09:07:09,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 116 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 35 Invalid, 2 Unknown, 2 Unchecked, 4.3s Time] [2022-11-21 09:07:09,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 09:07:09,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:07:09,725 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:314) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:158) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:665) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:269) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:284) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.releaseLock(ChainingHoareTripleChecker.java:449) at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1655) at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:658) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.releaseLock(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:365) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Broken pipe at java.base/java.io.FileOutputStream.writeBytes(Native Method) at java.base/java.io.FileOutputStream.write(FileOutputStream.java:354) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:156) ... 36 more [2022-11-21 09:07:09,729 INFO L158 Benchmark]: Toolchain (without parser) took 18127.14ms. Allocated memory was 159.4MB in the beginning and 192.9MB in the end (delta: 33.6MB). Free memory was 121.6MB in the beginning and 98.2MB in the end (delta: 23.4MB). Peak memory consumption was 55.4MB. Max. memory is 16.1GB. [2022-11-21 09:07:09,730 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 119.5MB. Free memory is still 91.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-21 09:07:09,730 INFO L158 Benchmark]: CACSL2BoogieTranslator took 762.48ms. Allocated memory is still 159.4MB. Free memory was 121.6MB in the beginning and 118.8MB in the end (delta: 2.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-21 09:07:09,730 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.19ms. Allocated memory is still 159.4MB. Free memory was 118.8MB in the beginning and 116.2MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-21 09:07:09,731 INFO L158 Benchmark]: Boogie Preprocessor took 66.26ms. Allocated memory is still 159.4MB. Free memory was 116.1MB in the beginning and 113.6MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-21 09:07:09,731 INFO L158 Benchmark]: RCFGBuilder took 1030.35ms. Allocated memory is still 159.4MB. Free memory was 113.6MB in the beginning and 83.8MB in the end (delta: 29.7MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2022-11-21 09:07:09,732 INFO L158 Benchmark]: TraceAbstraction took 16206.81ms. Allocated memory was 159.4MB in the beginning and 192.9MB in the end (delta: 33.6MB). Free memory was 83.3MB in the beginning and 98.2MB in the end (delta: -15.0MB). Peak memory consumption was 19.2MB. Max. memory is 16.1GB. [2022-11-21 09:07:09,734 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 119.5MB. Free memory is still 91.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 762.48ms. Allocated memory is still 159.4MB. Free memory was 121.6MB in the beginning and 118.8MB in the end (delta: 2.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 52.19ms. Allocated memory is still 159.4MB. Free memory was 118.8MB in the beginning and 116.2MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 66.26ms. Allocated memory is still 159.4MB. Free memory was 116.1MB in the beginning and 113.6MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1030.35ms. Allocated memory is still 159.4MB. Free memory was 113.6MB in the beginning and 83.8MB in the end (delta: 29.7MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * TraceAbstraction took 16206.81ms. Allocated memory was 159.4MB in the beginning and 192.9MB in the end (delta: 33.6MB). Free memory was 83.3MB in the beginning and 98.2MB in the end (delta: -15.0MB). Peak memory consumption was 19.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:314) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0234-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 2e40f9e7b474ba5b84186650c7060a1f3eed5394bab52ac2eaa493135efa417c --- 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 09:07:12,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 09:07:12,724 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 09:07:12,766 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 09:07:12,767 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 09:07:12,768 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 09:07:12,771 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 09:07:12,777 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 09:07:12,783 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 09:07:12,784 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 09:07:12,786 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 09:07:12,788 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 09:07:12,791 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 09:07:12,795 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 09:07:12,797 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 09:07:12,798 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 09:07:12,799 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 09:07:12,801 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 09:07:12,803 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 09:07:12,805 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 09:07:12,807 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 09:07:12,809 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 09:07:12,810 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 09:07:12,812 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 09:07:12,816 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 09:07:12,817 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 09:07:12,818 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 09:07:12,819 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 09:07:12,819 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 09:07:12,821 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 09:07:12,821 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 09:07:12,822 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 09:07:12,823 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 09:07:12,824 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 09:07:12,826 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 09:07:12,826 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 09:07:12,827 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 09:07:12,827 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 09:07:12,828 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 09:07:12,829 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 09:07:12,830 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 09:07:12,831 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-21 09:07:12,861 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 09:07:12,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 09:07:12,862 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 09:07:12,862 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 09:07:12,863 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 09:07:12,864 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 09:07:12,865 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 09:07:12,865 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 09:07:12,865 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 09:07:12,866 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 09:07:12,866 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 09:07:12,867 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-21 09:07:12,867 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 09:07:12,867 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 09:07:12,867 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 09:07:12,868 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-21 09:07:12,868 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-21 09:07:12,868 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-21 09:07:12,869 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 09:07:12,869 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-21 09:07:12,869 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-21 09:07:12,869 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-21 09:07:12,870 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 09:07:12,870 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 09:07:12,870 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 09:07:12,871 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 09:07:12,871 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 09:07:12,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 09:07:12,871 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 09:07:12,872 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 09:07:12,872 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-21 09:07:12,872 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-21 09:07:12,873 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-21 09:07:12,873 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_4243d59e-1672-4b7e-89a2-d6fb92890c94/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e40f9e7b474ba5b84186650c7060a1f3eed5394bab52ac2eaa493135efa417c [2022-11-21 09:07:13,352 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 09:07:13,386 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 09:07:13,390 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 09:07:13,391 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 09:07:13,392 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 09:07:13,394 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/memsafety/test-0234-1.i [2022-11-21 09:07:17,086 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 09:07:17,405 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 09:07:17,406 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/sv-benchmarks/c/memsafety/test-0234-1.i [2022-11-21 09:07:17,419 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/data/c0dcb3860/a8febf8a52b944f896af9268b2dedb60/FLAG78fbd369c [2022-11-21 09:07:17,443 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/data/c0dcb3860/a8febf8a52b944f896af9268b2dedb60 [2022-11-21 09:07:17,445 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 09:07:17,447 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 09:07:17,448 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 09:07:17,449 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 09:07:17,452 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 09:07:17,453 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:07:17" (1/1) ... [2022-11-21 09:07:17,454 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@597fc73c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:07:17, skipping insertion in model container [2022-11-21 09:07:17,455 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:07:17" (1/1) ... [2022-11-21 09:07:17,463 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 09:07:17,534 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 09:07:18,074 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 09:07:18,100 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 09:07:18,189 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 09:07:18,272 INFO L208 MainTranslator]: Completed translation [2022-11-21 09:07:18,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:07:18 WrapperNode [2022-11-21 09:07:18,274 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 09:07:18,277 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 09:07:18,277 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 09:07:18,278 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 09:07:18,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:07:18" (1/1) ... [2022-11-21 09:07:18,317 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:07:18" (1/1) ... [2022-11-21 09:07:18,358 INFO L138 Inliner]: procedures = 189, calls = 60, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 199 [2022-11-21 09:07:18,359 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 09:07:18,361 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 09:07:18,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 09:07:18,361 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 09:07:18,371 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:07:18" (1/1) ... [2022-11-21 09:07:18,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:07:18" (1/1) ... [2022-11-21 09:07:18,390 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:07:18" (1/1) ... [2022-11-21 09:07:18,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:07:18" (1/1) ... [2022-11-21 09:07:18,409 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:07:18" (1/1) ... [2022-11-21 09:07:18,426 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:07:18" (1/1) ... [2022-11-21 09:07:18,431 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:07:18" (1/1) ... [2022-11-21 09:07:18,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:07:18" (1/1) ... [2022-11-21 09:07:18,442 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 09:07:18,446 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 09:07:18,446 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 09:07:18,447 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 09:07:18,448 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:07:18" (1/1) ... [2022-11-21 09:07:18,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 09:07:18,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:07:18,475 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 09:07:18,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 09:07:18,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-21 09:07:18,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 09:07:18,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-21 09:07:18,528 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-21 09:07:18,529 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2022-11-21 09:07:18,529 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2022-11-21 09:07:18,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 09:07:18,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-21 09:07:18,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-21 09:07:18,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 09:07:18,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 09:07:18,740 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 09:07:18,757 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 09:07:19,705 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 09:07:19,714 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 09:07:19,714 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-21 09:07:19,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:07:19 BoogieIcfgContainer [2022-11-21 09:07:19,717 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 09:07:19,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 09:07:19,720 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 09:07:19,723 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 09:07:19,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 09:07:17" (1/3) ... [2022-11-21 09:07:19,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@144f73cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:07:19, skipping insertion in model container [2022-11-21 09:07:19,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:07:18" (2/3) ... [2022-11-21 09:07:19,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@144f73cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:07:19, skipping insertion in model container [2022-11-21 09:07:19,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:07:19" (3/3) ... [2022-11-21 09:07:19,726 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0234-1.i [2022-11-21 09:07:19,746 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 09:07:19,747 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 75 error locations. [2022-11-21 09:07:19,800 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 09:07:19,807 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;@6cf88ca1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 09:07:19,807 INFO L358 AbstractCegarLoop]: Starting to check reachability of 75 error locations. [2022-11-21 09:07:19,812 INFO L276 IsEmpty]: Start isEmpty. Operand has 186 states, 103 states have (on average 1.941747572815534) internal successors, (200), 178 states have internal predecessors, (200), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 09:07:19,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-21 09:07:19,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:07:19,821 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-21 09:07:19,821 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-21 09:07:19,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:07:19,827 INFO L85 PathProgramCache]: Analyzing trace with hash 929958, now seen corresponding path program 1 times [2022-11-21 09:07:19,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 09:07:19,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [792993200] [2022-11-21 09:07:19,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:07:19,841 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 09:07:19,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 09:07:19,847 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:19,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:19,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:07:19,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-21 09:07:19,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:07:19,999 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 09:07:19,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 09:07:20,000 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 09:07:20,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [792993200] [2022-11-21 09:07:20,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [792993200] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:07:20,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:07:20,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 09:07:20,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295017435] [2022-11-21 09:07:20,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:07:20,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 09:07:20,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 09:07:20,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 09:07:20,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 09:07:20,080 INFO L87 Difference]: Start difference. First operand has 186 states, 103 states have (on average 1.941747572815534) internal successors, (200), 178 states have internal predecessors, (200), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:20,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:07:20,109 INFO L93 Difference]: Finished difference Result 186 states and 201 transitions. [2022-11-21 09:07:20,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 09:07:20,128 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-21 09:07:20,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:07:20,136 INFO L225 Difference]: With dead ends: 186 [2022-11-21 09:07:20,137 INFO L226 Difference]: Without dead ends: 184 [2022-11-21 09:07:20,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 3 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 09:07:20,142 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 09:07:20,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 09:07:20,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-21 09:07:20,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2022-11-21 09:07:20,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 102 states have (on average 1.8333333333333333) internal successors, (187), 176 states have internal predecessors, (187), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 09:07:20,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 199 transitions. [2022-11-21 09:07:20,242 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 199 transitions. Word has length 4 [2022-11-21 09:07:20,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:07:20,243 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 199 transitions. [2022-11-21 09:07:20,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:20,243 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 199 transitions. [2022-11-21 09:07:20,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-21 09:07:20,244 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:07:20,244 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-21 09:07:20,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:20,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:20,456 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-21 09:07:20,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:07:20,456 INFO L85 PathProgramCache]: Analyzing trace with hash 889837653, now seen corresponding path program 1 times [2022-11-21 09:07:20,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 09:07:20,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1281058885] [2022-11-21 09:07:20,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:07:20,458 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 09:07:20,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 09:07:20,459 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:20,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:20,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:07:20,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 09:07:20,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:07:20,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-21 09:07:20,667 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 09:07:20,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 09:07:20,667 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 09:07:20,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1281058885] [2022-11-21 09:07:20,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1281058885] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:07:20,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:07:20,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 09:07:20,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155196073] [2022-11-21 09:07:20,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:07:20,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 09:07:20,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 09:07:20,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 09:07:20,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 09:07:20,683 INFO L87 Difference]: Start difference. First operand 184 states and 199 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:21,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:07:21,135 INFO L93 Difference]: Finished difference Result 183 states and 198 transitions. [2022-11-21 09:07:21,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 09:07:21,137 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 09:07:21,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:07:21,139 INFO L225 Difference]: With dead ends: 183 [2022-11-21 09:07:21,140 INFO L226 Difference]: Without dead ends: 183 [2022-11-21 09:07:21,140 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 09:07:21,141 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 9 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 09:07:21,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 306 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 09:07:21,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-11-21 09:07:21,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2022-11-21 09:07:21,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 102 states have (on average 1.8235294117647058) internal successors, (186), 175 states have internal predecessors, (186), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 09:07:21,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 198 transitions. [2022-11-21 09:07:21,178 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 198 transitions. Word has length 6 [2022-11-21 09:07:21,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:07:21,178 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 198 transitions. [2022-11-21 09:07:21,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:21,179 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 198 transitions. [2022-11-21 09:07:21,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-21 09:07:21,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:07:21,180 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:07:21,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:21,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:21,402 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-21 09:07:21,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:07:21,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1815163792, now seen corresponding path program 1 times [2022-11-21 09:07:21,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 09:07:21,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1229117389] [2022-11-21 09:07:21,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:07:21,405 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 09:07:21,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 09:07:21,407 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:21,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:21,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:07:21,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-21 09:07:21,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:07:21,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 09:07:21,677 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 09:07:21,678 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 09:07:21,678 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 09:07:21,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1229117389] [2022-11-21 09:07:21,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1229117389] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:07:21,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:07:21,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 09:07:21,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188080665] [2022-11-21 09:07:21,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:07:21,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 09:07:21,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 09:07:21,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 09:07:21,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 09:07:21,691 INFO L87 Difference]: Start difference. First operand 183 states and 198 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:22,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:07:22,285 INFO L93 Difference]: Finished difference Result 192 states and 207 transitions. [2022-11-21 09:07:22,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 09:07:22,287 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 09:07:22,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:07:22,289 INFO L225 Difference]: With dead ends: 192 [2022-11-21 09:07:22,289 INFO L226 Difference]: Without dead ends: 192 [2022-11-21 09:07:22,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 09:07:22,296 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 16 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-21 09:07:22,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 504 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-21 09:07:22,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-11-21 09:07:22,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2022-11-21 09:07:22,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 110 states have (on average 1.7727272727272727) internal successors, (195), 183 states have internal predecessors, (195), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 09:07:22,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 207 transitions. [2022-11-21 09:07:22,328 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 207 transitions. Word has length 7 [2022-11-21 09:07:22,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:07:22,329 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 207 transitions. [2022-11-21 09:07:22,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:22,329 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 207 transitions. [2022-11-21 09:07:22,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-21 09:07:22,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:07:22,334 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:07:22,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:22,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:22,556 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-21 09:07:22,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:07:22,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1255359815, now seen corresponding path program 1 times [2022-11-21 09:07:22,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 09:07:22,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1923882144] [2022-11-21 09:07:22,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:07:22,559 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 09:07:22,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 09:07:22,565 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:22,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:22,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:07:22,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 09:07:22,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:07:23,037 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-21 09:07:23,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 09:07:23,038 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 09:07:23,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1923882144] [2022-11-21 09:07:23,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1923882144] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:07:23,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:07:23,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 09:07:23,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331945686] [2022-11-21 09:07:23,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:07:23,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 09:07:23,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 09:07:23,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 09:07:23,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-21 09:07:23,042 INFO L87 Difference]: Start difference. First operand 192 states and 207 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 09:07:23,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:07:23,214 INFO L93 Difference]: Finished difference Result 204 states and 219 transitions. [2022-11-21 09:07:23,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 09:07:23,215 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 66 [2022-11-21 09:07:23,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:07:23,216 INFO L225 Difference]: With dead ends: 204 [2022-11-21 09:07:23,216 INFO L226 Difference]: Without dead ends: 194 [2022-11-21 09:07:23,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-21 09:07:23,218 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 14 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 09:07:23,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 726 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 09:07:23,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-11-21 09:07:23,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2022-11-21 09:07:23,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 112 states have (on average 1.7589285714285714) internal successors, (197), 185 states have internal predecessors, (197), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 09:07:23,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 209 transitions. [2022-11-21 09:07:23,229 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 209 transitions. Word has length 66 [2022-11-21 09:07:23,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:07:23,229 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 209 transitions. [2022-11-21 09:07:23,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 09:07:23,230 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 209 transitions. [2022-11-21 09:07:23,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-21 09:07:23,231 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:07:23,231 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:07:23,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:23,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:23,451 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-21 09:07:23,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:07:23,452 INFO L85 PathProgramCache]: Analyzing trace with hash 2028632282, now seen corresponding path program 1 times [2022-11-21 09:07:23,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 09:07:23,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [361238009] [2022-11-21 09:07:23,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:07:23,453 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 09:07:23,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 09:07:23,454 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:23,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:23,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:07:23,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-21 09:07:23,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:07:23,868 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 51 proven. 1 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-21 09:07:23,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:07:24,299 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-21 09:07:24,300 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 09:07:24,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [361238009] [2022-11-21 09:07:24,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [361238009] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:07:24,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 09:07:24,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-11-21 09:07:24,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734446303] [2022-11-21 09:07:24,302 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 09:07:24,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 09:07:24,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 09:07:24,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 09:07:24,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-21 09:07:24,305 INFO L87 Difference]: Start difference. First operand 194 states and 209 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-21 09:07:24,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:07:24,854 INFO L93 Difference]: Finished difference Result 213 states and 229 transitions. [2022-11-21 09:07:24,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 09:07:24,855 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 71 [2022-11-21 09:07:24,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:07:24,857 INFO L225 Difference]: With dead ends: 213 [2022-11-21 09:07:24,857 INFO L226 Difference]: Without dead ends: 198 [2022-11-21 09:07:24,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-11-21 09:07:24,859 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 45 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 09:07:24,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 1095 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 09:07:24,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-11-21 09:07:24,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2022-11-21 09:07:24,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 116 states have (on average 1.7327586206896552) internal successors, (201), 189 states have internal predecessors, (201), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 09:07:24,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 213 transitions. [2022-11-21 09:07:24,871 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 213 transitions. Word has length 71 [2022-11-21 09:07:24,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:07:24,872 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 213 transitions. [2022-11-21 09:07:24,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-21 09:07:24,873 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 213 transitions. [2022-11-21 09:07:24,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-21 09:07:24,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:07:24,876 INFO L195 NwaCegarLoop]: trace histogram [20, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:07:24,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:25,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:25,096 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-21 09:07:25,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:07:25,097 INFO L85 PathProgramCache]: Analyzing trace with hash -270641913, now seen corresponding path program 2 times [2022-11-21 09:07:25,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 09:07:25,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [706312590] [2022-11-21 09:07:25,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 09:07:25,099 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 09:07:25,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 09:07:25,101 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:25,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:25,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-21 09:07:25,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:07:25,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-21 09:07:25,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:07:25,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-21 09:07:25,736 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-11-21 09:07:25,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 09:07:25,736 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 09:07:25,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [706312590] [2022-11-21 09:07:25,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [706312590] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:07:25,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:07:25,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 09:07:25,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762733862] [2022-11-21 09:07:25,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:07:25,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 09:07:25,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 09:07:25,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 09:07:25,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 09:07:25,739 INFO L87 Difference]: Start difference. First operand 198 states and 213 transitions. Second operand has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-21 09:07:26,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:07:26,520 INFO L93 Difference]: Finished difference Result 197 states and 212 transitions. [2022-11-21 09:07:26,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 09:07:26,521 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 86 [2022-11-21 09:07:26,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:07:26,523 INFO L225 Difference]: With dead ends: 197 [2022-11-21 09:07:26,523 INFO L226 Difference]: Without dead ends: 197 [2022-11-21 09:07:26,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 09:07:26,525 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 7 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-21 09:07:26,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 319 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-21 09:07:26,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-11-21 09:07:26,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2022-11-21 09:07:26,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 116 states have (on average 1.7241379310344827) internal successors, (200), 188 states have internal predecessors, (200), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 09:07:26,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 212 transitions. [2022-11-21 09:07:26,536 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 212 transitions. Word has length 86 [2022-11-21 09:07:26,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:07:26,537 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 212 transitions. [2022-11-21 09:07:26,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-21 09:07:26,537 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 212 transitions. [2022-11-21 09:07:26,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-21 09:07:26,539 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:07:26,539 INFO L195 NwaCegarLoop]: trace histogram [22, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:07:26,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:26,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:26,755 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-21 09:07:26,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:07:26,756 INFO L85 PathProgramCache]: Analyzing trace with hash -674977782, now seen corresponding path program 1 times [2022-11-21 09:07:26,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 09:07:26,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [692528797] [2022-11-21 09:07:26,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:07:26,758 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 09:07:26,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 09:07:26,759 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:26,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:27,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:07:27,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-21 09:07:27,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:07:27,433 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 155 proven. 10 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-11-21 09:07:27,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:07:28,212 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 0 proven. 160 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2022-11-21 09:07:28,212 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 09:07:28,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [692528797] [2022-11-21 09:07:28,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [692528797] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:07:28,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 09:07:28,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-11-21 09:07:28,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706959977] [2022-11-21 09:07:28,214 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 09:07:28,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-21 09:07:28,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 09:07:28,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-21 09:07:28,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2022-11-21 09:07:28,216 INFO L87 Difference]: Start difference. First operand 197 states and 212 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-21 09:07:29,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:07:29,554 INFO L93 Difference]: Finished difference Result 229 states and 246 transitions. [2022-11-21 09:07:29,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-21 09:07:29,555 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) Word has length 95 [2022-11-21 09:07:29,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:07:29,557 INFO L225 Difference]: With dead ends: 229 [2022-11-21 09:07:29,557 INFO L226 Difference]: Without dead ends: 204 [2022-11-21 09:07:29,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2022-11-21 09:07:29,559 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 109 mSDsluCounter, 1675 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 1872 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-21 09:07:29,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 1872 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-21 09:07:29,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-11-21 09:07:29,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2022-11-21 09:07:29,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 123 states have (on average 1.6829268292682926) internal successors, (207), 195 states have internal predecessors, (207), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 09:07:29,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 219 transitions. [2022-11-21 09:07:29,568 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 219 transitions. Word has length 95 [2022-11-21 09:07:29,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:07:29,569 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 219 transitions. [2022-11-21 09:07:29,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-21 09:07:29,570 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 219 transitions. [2022-11-21 09:07:29,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-21 09:07:29,572 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:07:29,572 INFO L195 NwaCegarLoop]: trace histogram [45, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:07:29,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:29,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:29,795 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-21 09:07:29,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:07:29,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1892288145, now seen corresponding path program 2 times [2022-11-21 09:07:29,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 09:07:29,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [21774724] [2022-11-21 09:07:29,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 09:07:29,798 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 09:07:29,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 09:07:29,800 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:29,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:31,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 09:07:31,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:07:31,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 09:07:31,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:07:31,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 305 proven. 15 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2022-11-21 09:07:31,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:07:32,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 305 proven. 15 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2022-11-21 09:07:32,398 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 09:07:32,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [21774724] [2022-11-21 09:07:32,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [21774724] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:07:32,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 09:07:32,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-11-21 09:07:32,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783564742] [2022-11-21 09:07:32,401 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 09:07:32,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 09:07:32,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 09:07:32,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 09:07:32,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-11-21 09:07:32,409 INFO L87 Difference]: Start difference. First operand 204 states and 219 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-21 09:07:34,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:07:34,114 INFO L93 Difference]: Finished difference Result 221 states and 241 transitions. [2022-11-21 09:07:34,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-21 09:07:34,115 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 118 [2022-11-21 09:07:34,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:07:34,121 INFO L225 Difference]: With dead ends: 221 [2022-11-21 09:07:34,121 INFO L226 Difference]: Without dead ends: 211 [2022-11-21 09:07:34,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=345, Invalid=647, Unknown=0, NotChecked=0, Total=992 [2022-11-21 09:07:34,123 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 143 mSDsluCounter, 1493 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 1684 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-21 09:07:34,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 1684 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-21 09:07:34,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-21 09:07:34,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2022-11-21 09:07:34,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 130 states have (on average 1.646153846153846) internal successors, (214), 202 states have internal predecessors, (214), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 09:07:34,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 226 transitions. [2022-11-21 09:07:34,133 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 226 transitions. Word has length 118 [2022-11-21 09:07:34,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:07:34,135 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 226 transitions. [2022-11-21 09:07:34,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-21 09:07:34,136 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 226 transitions. [2022-11-21 09:07:34,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-21 09:07:34,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:07:34,146 INFO L195 NwaCegarLoop]: trace histogram [52, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:07:34,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:34,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:34,371 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-21 09:07:34,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:07:34,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1703298198, now seen corresponding path program 3 times [2022-11-21 09:07:34,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 09:07:34,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1378675500] [2022-11-21 09:07:34,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 09:07:34,373 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 09:07:34,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 09:07:34,375 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:34,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:34,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-21 09:07:34,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:07:34,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-21 09:07:34,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:07:35,084 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (_ BitVec 32))) (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (_ bv1 1)) |c_#valid|)) is different from true [2022-11-21 09:07:35,194 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-21 09:07:35,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-21 09:07:35,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 853 proven. 0 refuted. 0 times theorem prover too weak. 796 trivial. 124 not checked. [2022-11-21 09:07:35,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:07:35,920 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-21 09:07:35,921 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 16 treesize of output 15 [2022-11-21 09:07:35,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 853 proven. 124 refuted. 0 times theorem prover too weak. 796 trivial. 0 not checked. [2022-11-21 09:07:35,959 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 09:07:35,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1378675500] [2022-11-21 09:07:35,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1378675500] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:07:35,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 09:07:35,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2022-11-21 09:07:35,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116358440] [2022-11-21 09:07:35,960 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 09:07:35,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 09:07:35,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 09:07:35,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 09:07:35,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=91, Unknown=1, NotChecked=18, Total=132 [2022-11-21 09:07:35,962 INFO L87 Difference]: Start difference. First operand 211 states and 226 transitions. Second operand has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-21 09:07:38,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:07:38,168 INFO L93 Difference]: Finished difference Result 247 states and 266 transitions. [2022-11-21 09:07:38,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 09:07:38,169 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 125 [2022-11-21 09:07:38,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:07:38,171 INFO L225 Difference]: With dead ends: 247 [2022-11-21 09:07:38,171 INFO L226 Difference]: Without dead ends: 247 [2022-11-21 09:07:38,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 235 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=159, Unknown=1, NotChecked=26, Total=240 [2022-11-21 09:07:38,173 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 120 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-21 09:07:38,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 1085 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 700 Invalid, 0 Unknown, 215 Unchecked, 1.9s Time] [2022-11-21 09:07:38,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-11-21 09:07:38,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 209. [2022-11-21 09:07:38,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 130 states have (on average 1.6307692307692307) internal successors, (212), 200 states have internal predecessors, (212), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 09:07:38,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 224 transitions. [2022-11-21 09:07:38,181 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 224 transitions. Word has length 125 [2022-11-21 09:07:38,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:07:38,182 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 224 transitions. [2022-11-21 09:07:38,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-21 09:07:38,183 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 224 transitions. [2022-11-21 09:07:38,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-21 09:07:38,184 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:07:38,185 INFO L195 NwaCegarLoop]: trace histogram [52, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:07:38,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:38,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:38,402 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-21 09:07:38,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:07:38,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1703298197, now seen corresponding path program 1 times [2022-11-21 09:07:38,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 09:07:38,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [500852112] [2022-11-21 09:07:38,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:07:38,403 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 09:07:38,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 09:07:38,404 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:38,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:39,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:07:39,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-21 09:07:39,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:07:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 620 proven. 78 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2022-11-21 09:07:40,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:07:41,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 620 proven. 78 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2022-11-21 09:07:41,697 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 09:07:41,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [500852112] [2022-11-21 09:07:41,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [500852112] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:07:41,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 09:07:41,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-11-21 09:07:41,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978620269] [2022-11-21 09:07:41,698 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 09:07:41,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-21 09:07:41,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 09:07:41,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-21 09:07:41,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2022-11-21 09:07:41,700 INFO L87 Difference]: Start difference. First operand 209 states and 224 transitions. Second operand has 32 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-21 09:07:47,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:07:47,223 INFO L93 Difference]: Finished difference Result 257 states and 303 transitions. [2022-11-21 09:07:47,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-21 09:07:47,224 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 125 [2022-11-21 09:07:47,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:07:47,226 INFO L225 Difference]: With dead ends: 257 [2022-11-21 09:07:47,227 INFO L226 Difference]: Without dead ends: 247 [2022-11-21 09:07:47,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1195, Invalid=2345, Unknown=0, NotChecked=0, Total=3540 [2022-11-21 09:07:47,229 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 461 mSDsluCounter, 2932 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 3133 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-21 09:07:47,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [461 Valid, 3133 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-21 09:07:47,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-11-21 09:07:47,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 227. [2022-11-21 09:07:47,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 148 states have (on average 1.5743243243243243) internal successors, (233), 218 states have internal predecessors, (233), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 09:07:47,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 245 transitions. [2022-11-21 09:07:47,238 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 245 transitions. Word has length 125 [2022-11-21 09:07:47,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:07:47,239 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 245 transitions. [2022-11-21 09:07:47,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-21 09:07:47,239 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 245 transitions. [2022-11-21 09:07:47,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-21 09:07:47,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:07:47,241 INFO L195 NwaCegarLoop]: trace histogram [66, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:07:47,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:47,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:47,451 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-21 09:07:47,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:07:47,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1448015925, now seen corresponding path program 2 times [2022-11-21 09:07:47,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 09:07:47,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1316139950] [2022-11-21 09:07:47,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 09:07:47,453 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 09:07:47,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 09:07:47,454 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:47,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:07:48,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 09:07:48,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:07:49,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-21 09:07:49,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:07:50,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2676 backedges. 1250 proven. 351 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2022-11-21 09:07:50,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:07:54,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2676 backedges. 1250 proven. 351 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2022-11-21 09:07:54,798 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 09:07:54,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1316139950] [2022-11-21 09:07:54,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1316139950] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:07:54,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 09:07:54,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 60 [2022-11-21 09:07:54,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944996157] [2022-11-21 09:07:54,800 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 09:07:54,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-21 09:07:54,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 09:07:54,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-21 09:07:54,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=958, Invalid=2582, Unknown=0, NotChecked=0, Total=3540 [2022-11-21 09:07:54,804 INFO L87 Difference]: Start difference. First operand 227 states and 245 transitions. Second operand has 60 states, 60 states have (on average 1.5) internal successors, (90), 60 states have internal predecessors, (90), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-21 09:08:16,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:08:16,908 INFO L93 Difference]: Finished difference Result 285 states and 345 transitions. [2022-11-21 09:08:16,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-11-21 09:08:16,909 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.5) internal successors, (90), 60 states have internal predecessors, (90), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 139 [2022-11-21 09:08:16,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:08:16,911 INFO L225 Difference]: With dead ends: 285 [2022-11-21 09:08:16,911 INFO L226 Difference]: Without dead ends: 275 [2022-11-21 09:08:16,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2140 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=3526, Invalid=6980, Unknown=0, NotChecked=0, Total=10506 [2022-11-21 09:08:16,916 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 960 mSDsluCounter, 6010 mSDsCounter, 0 mSdLazyCounter, 1948 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 960 SdHoareTripleChecker+Valid, 6215 SdHoareTripleChecker+Invalid, 2392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 1948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-21 09:08:16,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [960 Valid, 6215 Invalid, 2392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 1948 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-11-21 09:08:16,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-11-21 09:08:16,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 255. [2022-11-21 09:08:16,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 176 states have (on average 1.4829545454545454) internal successors, (261), 246 states have internal predecessors, (261), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 09:08:16,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 273 transitions. [2022-11-21 09:08:16,927 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 273 transitions. Word has length 139 [2022-11-21 09:08:16,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:08:16,928 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 273 transitions. [2022-11-21 09:08:16,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.5) internal successors, (90), 60 states have internal predecessors, (90), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-21 09:08:16,928 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 273 transitions. [2022-11-21 09:08:16,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-21 09:08:16,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:08:16,930 INFO L195 NwaCegarLoop]: trace histogram [94, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:08:16,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:08:17,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:08:17,147 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-21 09:08:17,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:08:17,147 INFO L85 PathProgramCache]: Analyzing trace with hash -16897909, now seen corresponding path program 3 times [2022-11-21 09:08:17,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 09:08:17,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1792745633] [2022-11-21 09:08:17,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 09:08:17,148 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 09:08:17,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 09:08:17,149 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:08:17,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:08:17,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-21 09:08:17,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:08:17,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-21 09:08:17,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:08:17,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 09:08:18,025 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_calloc_model_~ptr~0#1.base| (_ BitVec 32))) (and (= (select |c_old(#valid)| |zalloc_or_die_calloc_model_~ptr~0#1.base|) (_ bv0 1)) (exists ((v_ArrVal_2255 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_2255))))) is different from true [2022-11-21 09:08:18,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 09:08:18,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-21 09:08:18,620 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 09:08:18,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-21 09:08:18,659 INFO L134 CoverageAnalysis]: Checked inductivity of 5070 backedges. 2365 proven. 0 refuted. 0 times theorem prover too weak. 2203 trivial. 502 not checked. [2022-11-21 09:08:18,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:08:21,013 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 09:08:21,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1792745633] [2022-11-21 09:08:21,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1792745633] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:08:21,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [653525289] [2022-11-21 09:08:21,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 09:08:21,013 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-21 09:08:21,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/cvc4 [2022-11-21 09:08:21,015 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-21 09:08:21,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-21 09:08:21,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-21 09:08:21,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:08:21,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-21 09:08:21,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:08:21,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 09:08:22,107 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_calloc_model_~ptr~0#1.base| (_ BitVec 32))) (and (exists ((v_ArrVal_2836 (_ BitVec 32))) (= (store |c_old(#length)| |zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_2836) |c_#length|)) (= (select |c_old(#valid)| |zalloc_or_die_calloc_model_~ptr~0#1.base|) (_ bv0 1)))) is different from true [2022-11-21 09:08:22,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 09:08:22,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-21 09:08:22,694 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 09:08:22,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-21 09:08:22,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5070 backedges. 2365 proven. 0 refuted. 0 times theorem prover too weak. 2203 trivial. 502 not checked. [2022-11-21 09:08:22,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:08:22,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [653525289] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:08:22,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 09:08:22,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2022-11-21 09:08:22,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186658961] [2022-11-21 09:08:22,952 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 09:08:22,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-21 09:08:22,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 09:08:22,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-21 09:08:22,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=130, Unknown=3, NotChecked=46, Total=210 [2022-11-21 09:08:22,954 INFO L87 Difference]: Start difference. First operand 255 states and 273 transitions. Second operand has 13 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-21 09:08:26,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:08:26,103 INFO L93 Difference]: Finished difference Result 298 states and 323 transitions. [2022-11-21 09:08:26,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 09:08:26,105 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 167 [2022-11-21 09:08:26,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:08:26,108 INFO L225 Difference]: With dead ends: 298 [2022-11-21 09:08:26,108 INFO L226 Difference]: Without dead ends: 298 [2022-11-21 09:08:26,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 322 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=59, Invalid=218, Unknown=3, NotChecked=62, Total=342 [2022-11-21 09:08:26,109 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 309 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 1384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 395 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-21 09:08:26,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 832 Invalid, 1384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 976 Invalid, 0 Unknown, 395 Unchecked, 2.5s Time] [2022-11-21 09:08:26,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-11-21 09:08:26,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 253. [2022-11-21 09:08:26,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 176 states have (on average 1.4715909090909092) internal successors, (259), 244 states have internal predecessors, (259), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 09:08:26,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 271 transitions. [2022-11-21 09:08:26,123 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 271 transitions. Word has length 167 [2022-11-21 09:08:26,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:08:26,124 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 271 transitions. [2022-11-21 09:08:26,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-21 09:08:26,125 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 271 transitions. [2022-11-21 09:08:26,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-11-21 09:08:26,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:08:26,127 INFO L195 NwaCegarLoop]: trace histogram [94, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:08:26,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:08:26,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-11-21 09:08:26,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt [2022-11-21 09:08:26,542 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-21 09:08:26,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:08:26,543 INFO L85 PathProgramCache]: Analyzing trace with hash 940977899, now seen corresponding path program 1 times [2022-11-21 09:08:26,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 09:08:26,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1738117802] [2022-11-21 09:08:26,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:08:26,544 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 09:08:26,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 09:08:26,546 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:08:26,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:08:28,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:08:28,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 1381 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-21 09:08:28,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:08:32,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5070 backedges. 2510 proven. 1485 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2022-11-21 09:08:32,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:08:44,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5070 backedges. 2510 proven. 1485 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2022-11-21 09:08:44,813 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 09:08:44,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1738117802] [2022-11-21 09:08:44,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1738117802] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:08:44,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 09:08:44,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 116 [2022-11-21 09:08:44,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834201550] [2022-11-21 09:08:44,814 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 09:08:44,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-11-21 09:08:44,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 09:08:44,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-11-21 09:08:44,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3478, Invalid=9862, Unknown=0, NotChecked=0, Total=13340 [2022-11-21 09:08:44,820 INFO L87 Difference]: Start difference. First operand 253 states and 271 transitions. Second operand has 116 states, 116 states have (on average 1.2758620689655173) internal successors, (148), 116 states have internal predecessors, (148), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-21 09:10:46,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:10:46,751 INFO L93 Difference]: Finished difference Result 339 states and 427 transitions. [2022-11-21 09:10:46,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-11-21 09:10:46,752 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.2758620689655173) internal successors, (148), 116 states have internal predecessors, (148), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 169 [2022-11-21 09:10:46,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:10:46,759 INFO L225 Difference]: With dead ends: 339 [2022-11-21 09:10:46,759 INFO L226 Difference]: Without dead ends: 329 [2022-11-21 09:10:46,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6550 ImplicationChecksByTransitivity, 110.8s TimeCoverageRelationStatistics Valid=11646, Invalid=23136, Unknown=0, NotChecked=0, Total=34782 [2022-11-21 09:10:46,771 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 3007 mSDsluCounter, 11262 mSDsCounter, 0 mSdLazyCounter, 5548 mSolverCounterSat, 1696 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3007 SdHoareTripleChecker+Valid, 11465 SdHoareTripleChecker+Invalid, 7244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1696 IncrementalHoareTripleChecker+Valid, 5548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.4s IncrementalHoareTripleChecker+Time [2022-11-21 09:10:46,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3007 Valid, 11465 Invalid, 7244 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1696 Valid, 5548 Invalid, 0 Unknown, 0 Unchecked, 24.4s Time] [2022-11-21 09:10:46,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-11-21 09:10:46,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 309. [2022-11-21 09:10:46,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 232 states have (on average 1.3577586206896552) internal successors, (315), 300 states have internal predecessors, (315), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 09:10:46,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 327 transitions. [2022-11-21 09:10:46,793 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 327 transitions. Word has length 169 [2022-11-21 09:10:46,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:10:46,794 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 327 transitions. [2022-11-21 09:10:46,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.2758620689655173) internal successors, (148), 116 states have internal predecessors, (148), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-21 09:10:46,794 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 327 transitions. [2022-11-21 09:10:46,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-11-21 09:10:46,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:10:46,798 INFO L195 NwaCegarLoop]: trace histogram [150, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:10:46,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:10:47,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:10:47,011 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-21 09:10:47,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:10:47,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1119866773, now seen corresponding path program 2 times [2022-11-21 09:10:47,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 09:10:47,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [767090691] [2022-11-21 09:10:47,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 09:10:47,013 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 09:10:47,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 09:10:47,014 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:10:47,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:10:49,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 09:10:49,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:10:49,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 1997 conjuncts, 119 conjunts are in the unsatisfiable core [2022-11-21 09:10:49,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:11:04,328 INFO L134 CoverageAnalysis]: Checked inductivity of 12210 backedges. 5030 proven. 6105 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2022-11-21 09:11:04,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:11:10,602 WARN L233 SmtUtils]: Spent 6.26s on a formula simplification that was a NOOP. DAG size: 351 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-21 09:11:44,803 INFO L134 CoverageAnalysis]: Checked inductivity of 12210 backedges. 5030 proven. 6105 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2022-11-21 09:11:44,804 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 09:11:44,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [767090691] [2022-11-21 09:11:44,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [767090691] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:11:44,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 09:11:44,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115] total 228 [2022-11-21 09:11:44,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451424181] [2022-11-21 09:11:44,805 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 09:11:44,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 228 states [2022-11-21 09:11:44,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 09:11:44,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 228 interpolants. [2022-11-21 09:11:44,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7969, Invalid=43787, Unknown=0, NotChecked=0, Total=51756 [2022-11-21 09:11:44,818 INFO L87 Difference]: Start difference. First operand 309 states and 327 transitions. Second operand has 228 states, 228 states have (on average 1.1403508771929824) internal successors, (260), 228 states have internal predecessors, (260), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-21 09:13:40,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:13:40,621 INFO L93 Difference]: Finished difference Result 348 states and 389 transitions. [2022-11-21 09:13:40,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-11-21 09:13:40,622 INFO L78 Accepts]: Start accepts. Automaton has has 228 states, 228 states have (on average 1.1403508771929824) internal successors, (260), 228 states have internal predecessors, (260), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 225 [2022-11-21 09:13:40,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:13:40,624 INFO L225 Difference]: With dead ends: 348 [2022-11-21 09:13:40,625 INFO L226 Difference]: Without dead ends: 338 [2022-11-21 09:13:40,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19225 ImplicationChecksByTransitivity, 58.0s TimeCoverageRelationStatistics Valid=10995, Invalid=52257, Unknown=0, NotChecked=0, Total=63252 [2022-11-21 09:13:40,632 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 3227 mSDsluCounter, 23606 mSDsCounter, 0 mSdLazyCounter, 16785 mSolverCounterSat, 1199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 90.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3227 SdHoareTripleChecker+Valid, 23809 SdHoareTripleChecker+Invalid, 17984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1199 IncrementalHoareTripleChecker+Valid, 16785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 103.6s IncrementalHoareTripleChecker+Time [2022-11-21 09:13:40,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3227 Valid, 23809 Invalid, 17984 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1199 Valid, 16785 Invalid, 0 Unknown, 0 Unchecked, 103.6s Time] [2022-11-21 09:13:40,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-11-21 09:13:40,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 318. [2022-11-21 09:13:40,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 241 states have (on average 1.3443983402489628) internal successors, (324), 309 states have internal predecessors, (324), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 09:13:40,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 336 transitions. [2022-11-21 09:13:40,644 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 336 transitions. Word has length 225 [2022-11-21 09:13:40,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:13:40,645 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 336 transitions. [2022-11-21 09:13:40,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 228 states, 228 states have (on average 1.1403508771929824) internal successors, (260), 228 states have internal predecessors, (260), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-21 09:13:40,646 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 336 transitions. [2022-11-21 09:13:40,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-11-21 09:13:40,650 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:13:40,650 INFO L195 NwaCegarLoop]: trace histogram [159, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:13:40,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:13:40,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:13:40,875 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-21 09:13:40,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:13:40,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1955142928, now seen corresponding path program 3 times [2022-11-21 09:13:40,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 09:13:40,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2058066989] [2022-11-21 09:13:40,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 09:13:40,877 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 09:13:40,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 09:13:40,878 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:13:40,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:13:41,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-21 09:13:41,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:13:41,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-21 09:13:41,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:13:42,076 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5312 (_ BitVec 1))) (= (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_5312) |c_#valid|)) is different from true [2022-11-21 09:13:42,124 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5312 (_ BitVec 1))) (= (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_#res#1.base| v_ArrVal_5312) |c_#valid|)) is different from true [2022-11-21 09:13:42,131 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5312 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_~ptr~1#1.base| v_ArrVal_5312))) is different from true [2022-11-21 09:13:42,137 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5312 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#res#1.base| v_ArrVal_5312))) is different from true [2022-11-21 09:13:42,167 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-21 09:13:42,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 24 [2022-11-21 09:13:42,267 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (_ BitVec 32))) (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (_ bv1 1)) |c_#valid|)) is different from true [2022-11-21 09:13:42,855 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-21 09:13:42,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-21 09:13:43,015 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 3797 proven. 0 refuted. 0 times theorem prover too weak. 7591 trivial. 2262 not checked. [2022-11-21 09:13:43,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:13:46,242 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-21 09:13:46,243 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 16 treesize of output 15 [2022-11-21 09:13:46,268 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 3797 proven. 2262 refuted. 0 times theorem prover too weak. 7591 trivial. 0 not checked. [2022-11-21 09:13:46,269 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 09:13:46,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2058066989] [2022-11-21 09:13:46,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2058066989] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:13:46,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 09:13:46,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 25 [2022-11-21 09:13:46,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12785273] [2022-11-21 09:13:46,270 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 09:13:46,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-21 09:13:46,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 09:13:46,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-21 09:13:46,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=368, Unknown=5, NotChecked=210, Total=650 [2022-11-21 09:13:46,273 INFO L87 Difference]: Start difference. First operand 318 states and 336 transitions. Second operand has 26 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 20 states have internal predecessors, (70), 3 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-21 09:13:50,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:13:50,331 INFO L93 Difference]: Finished difference Result 353 states and 375 transitions. [2022-11-21 09:13:50,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 09:13:50,331 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 20 states have internal predecessors, (70), 3 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 234 [2022-11-21 09:13:50,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:13:50,334 INFO L225 Difference]: With dead ends: 353 [2022-11-21 09:13:50,334 INFO L226 Difference]: Without dead ends: 353 [2022-11-21 09:13:50,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 439 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=129, Invalid=588, Unknown=5, NotChecked=270, Total=992 [2022-11-21 09:13:50,336 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 341 mSDsluCounter, 1593 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 1739 SdHoareTripleChecker+Invalid, 2323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1012 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-21 09:13:50,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 1739 Invalid, 2323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1251 Invalid, 0 Unknown, 1012 Unchecked, 3.5s Time] [2022-11-21 09:13:50,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-11-21 09:13:50,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 315. [2022-11-21 09:13:50,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 241 states have (on average 1.3319502074688796) internal successors, (321), 306 states have internal predecessors, (321), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 09:13:50,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 333 transitions. [2022-11-21 09:13:50,351 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 333 transitions. Word has length 234 [2022-11-21 09:13:50,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:13:50,352 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 333 transitions. [2022-11-21 09:13:50,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 20 states have internal predecessors, (70), 3 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-21 09:13:50,353 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 333 transitions. [2022-11-21 09:13:50,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-11-21 09:13:50,359 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:13:50,359 INFO L195 NwaCegarLoop]: trace histogram [159, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:13:50,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:13:50,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:13:50,577 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-21 09:13:50,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:13:50,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1955142927, now seen corresponding path program 1 times [2022-11-21 09:13:50,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 09:13:50,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1687426440] [2022-11-21 09:13:50,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:13:50,580 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 09:13:50,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 09:13:50,581 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:13:50,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:13:54,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:13:54,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 2096 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-21 09:13:54,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:13:54,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 09:13:54,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-21 09:13:55,153 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_calloc_model_~ptr~0#1.base| (_ BitVec 32))) (and (= (select |c_old(#valid)| |zalloc_or_die_calloc_model_~ptr~0#1.base|) (_ bv0 1)) (exists ((v_ArrVal_6292 (_ BitVec 32))) (= (store |c_old(#length)| |zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_6292) |c_#length|)))) is different from true [2022-11-21 09:13:55,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 09:13:55,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-21 09:13:55,340 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 09:13:55,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-21 09:13:55,464 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| |c_zalloc_or_die_#in~size#1|))) is different from true [2022-11-21 09:13:56,144 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-21 09:13:56,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-21 09:13:56,284 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 3797 proven. 1 refuted. 0 times theorem prover too weak. 7590 trivial. 2262 not checked. [2022-11-21 09:13:56,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:13:56,988 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 09:13:56,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1687426440] [2022-11-21 09:13:56,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1687426440] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:13:56,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [311634367] [2022-11-21 09:13:56,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:13:56,989 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-21 09:13:56,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/cvc4 [2022-11-21 09:13:56,993 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-21 09:13:56,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-21 09:14:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:14:32,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 2096 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-21 09:14:32,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:14:32,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 09:14:32,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-21 09:14:32,926 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_calloc_model_~ptr~0#1.base| (_ BitVec 32))) (and (= (select |c_old(#valid)| |zalloc_or_die_calloc_model_~ptr~0#1.base|) (_ bv0 1)) (exists ((v_ArrVal_7269 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_7269))))) is different from true [2022-11-21 09:14:33,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 09:14:33,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-21 09:14:33,097 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 09:14:33,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-21 09:14:33,791 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-21 09:14:33,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-21 09:14:33,894 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 3797 proven. 1 refuted. 0 times theorem prover too weak. 7590 trivial. 2262 not checked. [2022-11-21 09:14:33,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:14:34,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [311634367] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:14:34,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 09:14:34,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2022-11-21 09:14:34,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830203364] [2022-11-21 09:14:34,490 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 09:14:34,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-21 09:14:34,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 09:14:34,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-21 09:14:34,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=177, Unknown=3, NotChecked=84, Total=306 [2022-11-21 09:14:34,492 INFO L87 Difference]: Start difference. First operand 315 states and 333 transitions. Second operand has 16 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-21 09:14:39,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:14:39,939 INFO L93 Difference]: Finished difference Result 474 states and 507 transitions. [2022-11-21 09:14:39,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 09:14:39,940 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 234 [2022-11-21 09:14:39,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:14:39,943 INFO L225 Difference]: With dead ends: 474 [2022-11-21 09:14:39,943 INFO L226 Difference]: Without dead ends: 474 [2022-11-21 09:14:39,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 457 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=73, Invalid=315, Unknown=4, NotChecked=114, Total=506 [2022-11-21 09:14:39,944 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 167 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 1110 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 1105 SdHoareTripleChecker+Invalid, 2175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1049 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-21 09:14:39,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 1105 Invalid, 2175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1110 Invalid, 0 Unknown, 1049 Unchecked, 4.1s Time] [2022-11-21 09:14:39,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-11-21 09:14:39,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 325. [2022-11-21 09:14:39,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 249 states have (on average 1.321285140562249) internal successors, (329), 314 states have internal predecessors, (329), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-21 09:14:39,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 345 transitions. [2022-11-21 09:14:39,956 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 345 transitions. Word has length 234 [2022-11-21 09:14:39,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:14:39,957 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 345 transitions. [2022-11-21 09:14:39,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-21 09:14:39,958 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 345 transitions. [2022-11-21 09:14:39,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-11-21 09:14:39,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:14:39,960 INFO L195 NwaCegarLoop]: trace histogram [159, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:14:40,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:14:40,428 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (19)] Forcibly destroying the process [2022-11-21 09:14:40,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-21 09:14:40,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt [2022-11-21 09:14:40,485 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-21 09:14:40,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:14:40,486 INFO L85 PathProgramCache]: Analyzing trace with hash -2035375459, now seen corresponding path program 1 times [2022-11-21 09:14:40,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 09:14:40,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [902163687] [2022-11-21 09:14:40,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:14:40,489 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 09:14:40,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 09:14:40,490 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:14:40,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:14:44,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:14:44,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 2131 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-21 09:14:44,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:14:44,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-21 09:14:44,902 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_calloc_model_~ptr~0#1.base| (_ BitVec 32))) (and (= (select |c_old(#valid)| |zalloc_or_die_calloc_model_~ptr~0#1.base|) (_ bv0 1)) (exists ((v_ArrVal_8257 (_ BitVec 1))) (= (store |c_old(#valid)| |zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_8257) |c_#valid|)))) is different from true [2022-11-21 09:14:45,076 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-21 09:14:45,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-21 09:14:45,099 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8258 (_ BitVec 1))) (= (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_8258) |c_#valid|)) is different from true [2022-11-21 09:14:45,142 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8258 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_#res#1.base| v_ArrVal_8258))) is different from true [2022-11-21 09:14:45,149 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8258 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_~ptr~1#1.base| v_ArrVal_8258))) is different from true [2022-11-21 09:14:45,155 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8258 (_ BitVec 1))) (= (store |c_old(#valid)| |c_zalloc_or_die_#res#1.base| v_ArrVal_8258) |c_#valid|)) is different from true [2022-11-21 09:14:45,185 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-21 09:14:45,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 24 [2022-11-21 09:14:45,276 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (_ BitVec 32))) (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (_ bv1 1)) |c_#valid|)) is different from true [2022-11-21 09:14:45,753 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-21 09:14:45,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-21 09:14:45,920 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 2711 proven. 0 refuted. 0 times theorem prover too weak. 7414 trivial. 3525 not checked. [2022-11-21 09:14:45,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:14:51,672 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 2713 proven. 3525 refuted. 0 times theorem prover too weak. 7412 trivial. 0 not checked. [2022-11-21 09:14:51,672 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 09:14:51,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [902163687] [2022-11-21 09:14:51,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [902163687] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:14:51,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 09:14:51,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 26 [2022-11-21 09:14:51,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675452898] [2022-11-21 09:14:51,673 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 09:14:51,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-21 09:14:51,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 09:14:51,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-21 09:14:51,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=361, Unknown=7, NotChecked=258, Total=702 [2022-11-21 09:14:51,676 INFO L87 Difference]: Start difference. First operand 325 states and 345 transitions. Second operand has 27 states, 25 states have (on average 3.76) internal successors, (94), 21 states have internal predecessors, (94), 3 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-21 09:15:11,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:15:11,547 INFO L93 Difference]: Finished difference Result 357 states and 380 transitions. [2022-11-21 09:15:11,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 09:15:11,548 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 3.76) internal successors, (94), 21 states have internal predecessors, (94), 3 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) Word has length 240 [2022-11-21 09:15:11,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:15:11,549 INFO L225 Difference]: With dead ends: 357 [2022-11-21 09:15:11,549 INFO L226 Difference]: Without dead ends: 357 [2022-11-21 09:15:11,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 448 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=138, Invalid=581, Unknown=7, NotChecked=330, Total=1056 [2022-11-21 09:15:11,551 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 390 mSDsluCounter, 1419 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 1562 SdHoareTripleChecker+Invalid, 2348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1169 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-21 09:15:11,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 1562 Invalid, 2348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1138 Invalid, 0 Unknown, 1169 Unchecked, 3.2s Time] [2022-11-21 09:15:11,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-11-21 09:15:11,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 322. [2022-11-21 09:15:11,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 249 states have (on average 1.3092369477911647) internal successors, (326), 311 states have internal predecessors, (326), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-21 09:15:11,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 342 transitions. [2022-11-21 09:15:11,562 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 342 transitions. Word has length 240 [2022-11-21 09:15:11,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:15:11,563 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 342 transitions. [2022-11-21 09:15:11,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 3.76) internal successors, (94), 21 states have internal predecessors, (94), 3 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-21 09:15:11,564 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 342 transitions. [2022-11-21 09:15:11,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-11-21 09:15:11,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:15:11,566 INFO L195 NwaCegarLoop]: trace histogram [159, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:15:11,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:15:11,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:15:11,791 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-21 09:15:11,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:15:11,792 INFO L85 PathProgramCache]: Analyzing trace with hash -2035375458, now seen corresponding path program 1 times [2022-11-21 09:15:11,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 09:15:11,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1505721333] [2022-11-21 09:15:11,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:15:11,794 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 09:15:11,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 09:15:11,795 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:15:11,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:15:15,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:15:16,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 2131 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-21 09:15:16,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:15:16,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 09:15:16,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-21 09:15:16,550 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_calloc_model_~ptr~0#1.base| (_ BitVec 32))) (and (= (select |c_old(#valid)| |zalloc_or_die_calloc_model_~ptr~0#1.base|) (_ bv0 1)) (exists ((v_ArrVal_9254 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_9254))))) is different from true [2022-11-21 09:15:16,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 09:15:16,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-21 09:15:16,704 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 09:15:16,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-21 09:15:17,201 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-21 09:15:17,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-21 09:15:17,397 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| |c_zalloc_or_die_#in~size#1|))) is different from true [2022-11-21 09:15:18,041 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-21 09:15:18,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-21 09:15:18,604 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 2711 proven. 90 refuted. 0 times theorem prover too weak. 7412 trivial. 3437 not checked. [2022-11-21 09:15:18,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:15:19,989 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 09:15:19,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1505721333] [2022-11-21 09:15:19,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1505721333] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:15:19,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [813528360] [2022-11-21 09:15:19,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:15:19,990 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-21 09:15:19,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/cvc4 [2022-11-21 09:15:19,991 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-21 09:15:19,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-21 09:16:05,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:16:07,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 2131 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-21 09:16:07,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:16:07,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 09:16:07,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-21 09:16:07,806 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_calloc_model_~ptr~0#1.base| (_ BitVec 32))) (and (exists ((v_ArrVal_10245 (_ BitVec 32))) (= (store |c_old(#length)| |zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_10245) |c_#length|)) (= (select |c_old(#valid)| |zalloc_or_die_calloc_model_~ptr~0#1.base|) (_ bv0 1)) (exists ((v_ArrVal_10244 (_ BitVec 1))) (= (store |c_old(#valid)| |zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_10244) |c_#valid|)))) is different from true [2022-11-21 09:16:08,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 09:16:08,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-21 09:16:08,058 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-21 09:16:08,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-21 09:16:08,118 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (_ BitVec 32)) (v_ArrVal_10246 (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_10246)) (= (_ bv0 1) (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)))) is different from true [2022-11-21 09:16:08,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 09:16:08,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-21 09:16:08,327 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 09:16:08,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-21 09:16:09,004 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-21 09:16:09,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-21 09:16:09,264 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 2711 proven. 2 refuted. 0 times theorem prover too weak. 7412 trivial. 3525 not checked. [2022-11-21 09:16:09,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:16:10,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [813528360] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:16:10,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 09:16:10,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15] total 24 [2022-11-21 09:16:10,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178461635] [2022-11-21 09:16:10,081 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 09:16:10,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-21 09:16:10,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 09:16:10,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-21 09:16:10,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=524, Unknown=9, NotChecked=196, Total=812 [2022-11-21 09:16:10,082 INFO L87 Difference]: Start difference. First operand 322 states and 342 transitions. Second operand has 25 states, 23 states have (on average 4.173913043478261) internal successors, (96), 20 states have internal predecessors, (96), 4 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-21 09:16:19,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:16:19,249 INFO L93 Difference]: Finished difference Result 363 states and 390 transitions. [2022-11-21 09:16:19,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-21 09:16:19,251 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 4.173913043478261) internal successors, (96), 20 states have internal predecessors, (96), 4 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 4 states have call successors, (9) Word has length 240 [2022-11-21 09:16:19,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:16:19,254 INFO L225 Difference]: With dead ends: 363 [2022-11-21 09:16:19,254 INFO L226 Difference]: Without dead ends: 363 [2022-11-21 09:16:19,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=225, Invalid=1188, Unknown=9, NotChecked=300, Total=1722 [2022-11-21 09:16:19,256 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 1004 mSDsluCounter, 1316 mSDsCounter, 0 mSdLazyCounter, 1596 mSolverCounterSat, 39 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1004 SdHoareTripleChecker+Valid, 1432 SdHoareTripleChecker+Invalid, 2425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1596 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 782 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-21 09:16:19,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1004 Valid, 1432 Invalid, 2425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1596 Invalid, 8 Unknown, 782 Unchecked, 5.9s Time] [2022-11-21 09:16:19,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-11-21 09:16:19,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 319. [2022-11-21 09:16:19,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 249 states have (on average 1.2971887550200802) internal successors, (323), 308 states have internal predecessors, (323), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-21 09:16:19,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 339 transitions. [2022-11-21 09:16:19,267 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 339 transitions. Word has length 240 [2022-11-21 09:16:19,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:16:19,268 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 339 transitions. [2022-11-21 09:16:19,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 4.173913043478261) internal successors, (96), 20 states have internal predecessors, (96), 4 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-21 09:16:19,269 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 339 transitions. [2022-11-21 09:16:19,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-11-21 09:16:19,271 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:16:19,271 INFO L195 NwaCegarLoop]: trace histogram [159, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:16:19,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:16:19,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-11-21 09:16:19,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt [2022-11-21 09:16:19,690 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-21 09:16:19,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:16:19,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1327870244, now seen corresponding path program 1 times [2022-11-21 09:16:19,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 09:16:19,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [938775289] [2022-11-21 09:16:19,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:16:19,692 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 09:16:19,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 09:16:19,693 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:16:19,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:16:25,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:16:25,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 2137 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-21 09:16:25,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:16:25,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 09:16:25,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-21 09:16:25,786 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_calloc_model_~ptr~0#1.base| (_ BitVec 32))) (and (= (select |c_old(#valid)| |zalloc_or_die_calloc_model_~ptr~0#1.base|) (_ bv0 1)) (exists ((v_ArrVal_11235 (_ BitVec 32))) (= (store |c_old(#length)| |zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_11235) |c_#length|)))) is different from true [2022-11-21 09:16:25,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 09:16:25,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-21 09:16:25,978 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 09:16:25,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-21 09:16:26,063 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| |c_zalloc_or_die_#in~size#1|))) is different from true [2022-11-21 09:16:26,653 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-21 09:16:26,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-21 09:16:26,873 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 3797 proven. 1 refuted. 0 times theorem prover too weak. 7590 trivial. 2262 not checked. [2022-11-21 09:16:26,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:16:27,724 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 09:16:27,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [938775289] [2022-11-21 09:16:27,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [938775289] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:16:27,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1952550502] [2022-11-21 09:16:27,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:16:27,725 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-21 09:16:27,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/cvc4 [2022-11-21 09:16:27,728 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-21 09:16:27,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-11-21 09:17:10,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:17:11,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 2137 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-21 09:17:11,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:17:11,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 09:17:12,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-21 09:17:12,718 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-21 09:17:12,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-21 09:17:12,744 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 09:17:12,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-21 09:17:13,451 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-21 09:17:13,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-21 09:17:13,645 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 3797 proven. 89 refuted. 0 times theorem prover too weak. 7590 trivial. 2174 not checked. [2022-11-21 09:17:13,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:17:14,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1952550502] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:17:14,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 09:17:14,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 18 [2022-11-21 09:17:14,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091911259] [2022-11-21 09:17:14,309 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 09:17:14,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-21 09:17:14,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 09:17:14,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-21 09:17:14,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=297, Unknown=2, NotChecked=70, Total=420 [2022-11-21 09:17:14,311 INFO L87 Difference]: Start difference. First operand 319 states and 339 transitions. Second operand has 19 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 15 states have internal predecessors, (68), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-21 09:17:21,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:17:21,064 INFO L93 Difference]: Finished difference Result 461 states and 494 transitions. [2022-11-21 09:17:21,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 09:17:21,065 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 15 states have internal predecessors, (68), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 241 [2022-11-21 09:17:21,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:17:21,068 INFO L225 Difference]: With dead ends: 461 [2022-11-21 09:17:21,068 INFO L226 Difference]: Without dead ends: 461 [2022-11-21 09:17:21,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 482 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=85, Invalid=427, Unknown=2, NotChecked=86, Total=600 [2022-11-21 09:17:21,069 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 162 mSDsluCounter, 1434 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 10 mSolverCounterUnsat, 109 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 1565 SdHoareTripleChecker+Invalid, 1748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 109 IncrementalHoareTripleChecker+Unknown, 382 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-21 09:17:21,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 1565 Invalid, 1748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1247 Invalid, 109 Unknown, 382 Unchecked, 5.2s Time] [2022-11-21 09:17:21,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-11-21 09:17:21,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 323. [2022-11-21 09:17:21,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 253 states have (on average 1.2964426877470356) internal successors, (328), 312 states have internal predecessors, (328), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-21 09:17:21,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 344 transitions. [2022-11-21 09:17:21,082 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 344 transitions. Word has length 241 [2022-11-21 09:17:21,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:17:21,082 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 344 transitions. [2022-11-21 09:17:21,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 15 states have internal predecessors, (68), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-21 09:17:21,083 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 344 transitions. [2022-11-21 09:17:21,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-11-21 09:17:21,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:17:21,085 INFO L195 NwaCegarLoop]: trace histogram [159, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:17:21,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:17:21,499 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (24)] Forcibly destroying the process [2022-11-21 09:17:21,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2022-11-21 09:17:21,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt [2022-11-21 09:17:21,500 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-21 09:17:21,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:17:21,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1485259670, now seen corresponding path program 1 times [2022-11-21 09:17:21,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 09:17:21,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [333003867] [2022-11-21 09:17:21,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:17:21,502 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 09:17:21,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 09:17:21,503 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:17:21,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:17:25,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:17:25,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 2166 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-21 09:17:25,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:17:25,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-21 09:17:25,925 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_calloc_model_~ptr~0#1.base| (_ BitVec 32))) (and (= (select |c_old(#valid)| |zalloc_or_die_calloc_model_~ptr~0#1.base|) (_ bv0 1)) (exists ((v_ArrVal_13224 (_ BitVec 1))) (= (store |c_old(#valid)| |zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_13224) |c_#valid|)))) is different from true [2022-11-21 09:17:26,125 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-21 09:17:26,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-21 09:17:26,151 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_13225 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_13225))) is different from true [2022-11-21 09:17:26,200 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_13225 (_ BitVec 1))) (= (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_#res#1.base| v_ArrVal_13225) |c_#valid|)) is different from true [2022-11-21 09:17:26,207 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_13225 (_ BitVec 1))) (= (store |c_old(#valid)| |c_zalloc_or_die_~ptr~1#1.base| v_ArrVal_13225) |c_#valid|)) is different from true [2022-11-21 09:17:26,215 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_13225 (_ BitVec 1))) (= (store |c_old(#valid)| |c_zalloc_or_die_#res#1.base| v_ArrVal_13225) |c_#valid|)) is different from true [2022-11-21 09:17:26,251 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-21 09:17:26,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 24 [2022-11-21 09:17:26,396 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_13226 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_13226))) is different from true [2022-11-21 09:17:26,439 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_13226 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_#res#1.base| v_ArrVal_13226))) is different from true [2022-11-21 09:17:26,445 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_13226 (_ BitVec 1))) (= (store |c_old(#valid)| |c_zalloc_or_die_~ptr~1#1.base| v_ArrVal_13226) |c_#valid|)) is different from true [2022-11-21 09:17:26,452 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_13226 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#res#1.base| v_ArrVal_13226))) is different from true [2022-11-21 09:17:26,484 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-21 09:17:26,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-21 09:17:26,614 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (_ BitVec 32))) (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (_ bv1 1)) |c_#valid|)) is different from true [2022-11-21 09:17:27,049 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-21 09:17:27,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 31 [2022-11-21 09:17:27,473 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 1447 proven. 0 refuted. 0 times theorem prover too weak. 7327 trivial. 4876 not checked. [2022-11-21 09:17:27,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:17:27,794 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 09:17:27,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [333003867] [2022-11-21 09:17:27,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [333003867] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:17:27,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [5302520] [2022-11-21 09:17:27,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:17:27,795 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-21 09:17:27,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/cvc4 [2022-11-21 09:17:27,796 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-21 09:17:27,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-21 09:17:52,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:17:52,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 2166 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-21 09:17:52,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:17:52,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-21 09:17:52,755 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-21 09:17:52,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-21 09:17:53,436 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-21 09:17:53,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-11-21 09:17:53,582 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_14228 (_ BitVec 1))) (= (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_14228) |c_#valid|)) is different from true [2022-11-21 09:17:53,634 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_14228 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_#res#1.base| v_ArrVal_14228))) is different from true [2022-11-21 09:17:53,642 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_14228 (_ BitVec 1))) (= (store |c_old(#valid)| |c_zalloc_or_die_~ptr~1#1.base| v_ArrVal_14228) |c_#valid|)) is different from true [2022-11-21 09:17:53,650 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_14228 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#res#1.base| v_ArrVal_14228))) is different from true [2022-11-21 09:17:53,720 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2022-11-21 09:17:53,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 40 [2022-11-21 09:17:54,496 INFO L321 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2022-11-21 09:17:54,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 64 [2022-11-21 09:17:55,121 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 1535 proven. 176 refuted. 0 times theorem prover too weak. 7327 trivial. 4612 not checked. [2022-11-21 09:17:55,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:17:55,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [5302520] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:17:55,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 09:17:55,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28] total 44 [2022-11-21 09:17:55,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749046219] [2022-11-21 09:17:55,413 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 09:17:55,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-21 09:17:55,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 09:17:55,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-21 09:17:55,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1091, Unknown=14, NotChecked=1134, Total=2450 [2022-11-21 09:17:55,416 INFO L87 Difference]: Start difference. First operand 323 states and 344 transitions. Second operand has 45 states, 42 states have (on average 3.0476190476190474) internal successors, (128), 37 states have internal predecessors, (128), 6 states have call successors, (9), 2 states have call predecessors, (9), 9 states have return successors, (10), 10 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-21 09:18:00,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:18:00,638 INFO L93 Difference]: Finished difference Result 353 states and 377 transitions. [2022-11-21 09:18:00,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-21 09:18:00,647 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 3.0476190476190474) internal successors, (128), 37 states have internal predecessors, (128), 6 states have call successors, (9), 2 states have call predecessors, (9), 9 states have return successors, (10), 10 states have call predecessors, (10), 6 states have call successors, (10) Word has length 246 [2022-11-21 09:18:00,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:18:00,649 INFO L225 Difference]: With dead ends: 353 [2022-11-21 09:18:00,650 INFO L226 Difference]: Without dead ends: 353 [2022-11-21 09:18:00,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 472 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 14 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=371, Invalid=1651, Unknown=14, NotChecked=1386, Total=3422 [2022-11-21 09:18:00,654 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 553 mSDsluCounter, 1652 mSDsCounter, 0 mSdLazyCounter, 1468 mSolverCounterSat, 51 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 1786 SdHoareTripleChecker+Invalid, 4509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1468 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 2978 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-21 09:18:00,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [553 Valid, 1786 Invalid, 4509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1468 Invalid, 12 Unknown, 2978 Unchecked, 4.5s Time] [2022-11-21 09:18:00,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-11-21 09:18:00,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 320. [2022-11-21 09:18:00,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 253 states have (on average 1.284584980237154) internal successors, (325), 309 states have internal predecessors, (325), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-21 09:18:00,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 341 transitions. [2022-11-21 09:18:00,673 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 341 transitions. Word has length 246 [2022-11-21 09:18:00,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:18:00,674 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 341 transitions. [2022-11-21 09:18:00,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 3.0476190476190474) internal successors, (128), 37 states have internal predecessors, (128), 6 states have call successors, (9), 2 states have call predecessors, (9), 9 states have return successors, (10), 10 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-21 09:18:00,674 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 341 transitions. [2022-11-21 09:18:00,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-11-21 09:18:00,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:18:00,676 INFO L195 NwaCegarLoop]: trace histogram [159, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:18:00,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:18:00,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2022-11-21 09:18:01,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt [2022-11-21 09:18:01,094 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-21 09:18:01,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:18:01,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1485259669, now seen corresponding path program 1 times [2022-11-21 09:18:01,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 09:18:01,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1271076190] [2022-11-21 09:18:01,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:18:01,096 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 09:18:01,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 09:18:01,097 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:18:01,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:18:06,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:18:06,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 2166 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-21 09:18:06,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:18:06,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-21 09:18:06,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 09:18:06,722 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_calloc_model_~ptr~0#1.base| (_ BitVec 32))) (and (= (select |c_old(#valid)| |zalloc_or_die_calloc_model_~ptr~0#1.base|) (_ bv0 1)) (= (store |c_old(#length)| |zalloc_or_die_calloc_model_~ptr~0#1.base| |c_zalloc_or_die_#in~size#1|) |c_#length|))) is different from true [2022-11-21 09:18:06,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 09:18:06,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-21 09:18:06,895 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 09:18:06,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-21 09:18:07,497 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-21 09:18:07,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2022-11-21 09:18:07,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-21 09:18:08,610 INFO L321 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2022-11-21 09:18:08,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 52 [2022-11-21 09:18:09,423 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| |c_zalloc_or_die_#in~size#1|)) (= (_ bv0 1) (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)))) is different from true [2022-11-21 09:18:10,848 INFO L321 Elim1Store]: treesize reduction 46, result has 43.9 percent of original size [2022-11-21 09:18:10,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 82 [2022-11-21 09:18:10,931 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 09:18:10,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 71 [2022-11-21 09:18:13,156 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 1449 proven. 266 refuted. 0 times theorem prover too weak. 7323 trivial. 4612 not checked. [2022-11-21 09:18:13,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:18:16,825 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 09:18:16,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1271076190] [2022-11-21 09:18:16,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1271076190] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:18:16,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [887054137] [2022-11-21 09:18:16,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:18:16,827 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-21 09:18:16,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/cvc4 [2022-11-21 09:18:16,828 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-21 09:18:16,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-21 09:19:11,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:19:12,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 2166 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-21 09:19:12,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:19:12,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 09:19:12,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-21 09:19:13,696 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-21 09:19:13,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-21 09:19:13,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-21 09:19:15,078 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-21 09:19:15,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-21 09:19:15,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-21 09:19:15,599 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-21 09:19:15,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-21 09:19:16,005 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| |c_zalloc_or_die_#in~size#1|))) is different from true [2022-11-21 09:19:16,634 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-21 09:19:16,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-21 09:19:17,378 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 1447 proven. 532 refuted. 0 times theorem prover too weak. 7323 trivial. 4348 not checked. [2022-11-21 09:19:17,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:19:18,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [887054137] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:19:18,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 09:19:18,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 32] total 46 [2022-11-21 09:19:18,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082099711] [2022-11-21 09:19:18,946 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 09:19:18,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-21 09:19:18,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 09:19:18,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-21 09:19:18,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2175, Unknown=9, NotChecked=288, Total=2652 [2022-11-21 09:19:18,948 INFO L87 Difference]: Start difference. First operand 320 states and 341 transitions. Second operand has 47 states, 41 states have (on average 3.1219512195121952) internal successors, (128), 38 states have internal predecessors, (128), 8 states have call successors, (9), 3 states have call predecessors, (9), 9 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-21 09:19:42,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:19:42,999 INFO L93 Difference]: Finished difference Result 529 states and 572 transitions. [2022-11-21 09:19:43,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-21 09:19:43,001 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 41 states have (on average 3.1219512195121952) internal successors, (128), 38 states have internal predecessors, (128), 8 states have call successors, (9), 3 states have call predecessors, (9), 9 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) Word has length 246 [2022-11-21 09:19:43,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:19:43,003 INFO L225 Difference]: With dead ends: 529 [2022-11-21 09:19:43,003 INFO L226 Difference]: Without dead ends: 529 [2022-11-21 09:19:43,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 475 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=805, Invalid=6170, Unknown=9, NotChecked=498, Total=7482 [2022-11-21 09:19:43,005 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 2445 mSDsluCounter, 2572 mSDsCounter, 0 mSdLazyCounter, 3558 mSolverCounterSat, 156 mSolverCounterUnsat, 153 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2445 SdHoareTripleChecker+Valid, 2685 SdHoareTripleChecker+Invalid, 4832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 3558 IncrementalHoareTripleChecker+Invalid, 153 IncrementalHoareTripleChecker+Unknown, 965 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2022-11-21 09:19:43,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2445 Valid, 2685 Invalid, 4832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 3558 Invalid, 153 Unknown, 965 Unchecked, 14.2s Time] [2022-11-21 09:19:43,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-11-21 09:19:43,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 317. [2022-11-21 09:19:43,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 253 states have (on average 1.2727272727272727) internal successors, (322), 306 states have internal predecessors, (322), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-21 09:19:43,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 338 transitions. [2022-11-21 09:19:43,016 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 338 transitions. Word has length 246 [2022-11-21 09:19:43,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:19:43,017 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 338 transitions. [2022-11-21 09:19:43,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 41 states have (on average 3.1219512195121952) internal successors, (128), 38 states have internal predecessors, (128), 8 states have call successors, (9), 3 states have call predecessors, (9), 9 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-21 09:19:43,017 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 338 transitions. [2022-11-21 09:19:43,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-11-21 09:19:43,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:19:43,019 INFO L195 NwaCegarLoop]: trace histogram [159, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:19:43,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:19:43,437 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (28)] Forcibly destroying the process [2022-11-21 09:19:43,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-11-21 09:19:43,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt [2022-11-21 09:19:43,444 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-21 09:19:43,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:19:43,444 INFO L85 PathProgramCache]: Analyzing trace with hash -2047797161, now seen corresponding path program 1 times [2022-11-21 09:19:43,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 09:19:43,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1560182200] [2022-11-21 09:19:43,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:19:43,446 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 09:19:43,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 09:19:43,447 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:19:43,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/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 09:19:47,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:19:47,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 2201 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-21 09:19:47,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:19:47,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-21 09:19:47,747 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_calloc_model_~ptr~0#1.base| (_ BitVec 32))) (and (= (select |c_old(#valid)| |zalloc_or_die_calloc_model_~ptr~0#1.base|) (_ bv0 1)) (exists ((v_ArrVal_17249 (_ BitVec 1))) (= (store |c_old(#valid)| |zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_17249) |c_#valid|)))) is different from true [2022-11-21 09:19:47,891 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-21 09:19:47,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-21 09:19:47,913 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_17250 (_ BitVec 1))) (= (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_17250) |c_#valid|)) is different from true [2022-11-21 09:19:47,956 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_17250 (_ BitVec 1))) (= (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_#res#1.base| v_ArrVal_17250) |c_#valid|)) is different from true [2022-11-21 09:19:47,962 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_17250 (_ BitVec 1))) (= (store |c_old(#valid)| |c_zalloc_or_die_~ptr~1#1.base| v_ArrVal_17250) |c_#valid|)) is different from true [2022-11-21 09:19:47,969 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_17250 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#res#1.base| v_ArrVal_17250))) is different from true [2022-11-21 09:19:47,999 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-21 09:19:47,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 24 [2022-11-21 09:19:48,135 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_17251 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_17251))) is different from true [2022-11-21 09:19:48,179 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_17251 (_ BitVec 1))) (= (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_#res#1.base| v_ArrVal_17251) |c_#valid|)) is different from true [2022-11-21 09:19:48,186 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_17251 (_ BitVec 1))) (= (store |c_old(#valid)| |c_zalloc_or_die_~ptr~1#1.base| v_ArrVal_17251) |c_#valid|)) is different from true [2022-11-21 09:19:48,192 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_17251 (_ BitVec 1))) (= (store |c_old(#valid)| |c_zalloc_or_die_#res#1.base| v_ArrVal_17251) |c_#valid|)) is different from true [2022-11-21 09:19:48,224 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-21 09:19:48,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-21 09:19:48,432 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_17252 (_ BitVec 1))) (= (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_17252) |c_#valid|)) is different from true [2022-11-21 09:19:48,475 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_17252 (_ BitVec 1))) (= (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_#res#1.base| v_ArrVal_17252) |c_#valid|)) is different from true [2022-11-21 09:19:48,482 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_17252 (_ BitVec 1))) (= (store |c_old(#valid)| |c_zalloc_or_die_~ptr~1#1.base| v_ArrVal_17252) |c_#valid|)) is different from true [2022-11-21 09:19:48,489 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_17252 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#res#1.base| v_ArrVal_17252))) is different from true [2022-11-21 09:19:48,525 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-21 09:19:48,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 31 [2022-11-21 09:19:48,714 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (_ BitVec 32))) (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (_ bv1 1)) |c_#valid|)) is different from true [2022-11-21 09:19:49,162 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-21 09:19:49,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 34 [2022-11-21 09:19:49,790 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7330 trivial. 6315 not checked. [2022-11-21 09:19:49,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:19:50,330 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 09:19:50,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1560182200] [2022-11-21 09:19:50,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1560182200] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:19:50,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1284620136] [2022-11-21 09:19:50,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:19:50,331 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-21 09:19:50,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/cvc4 [2022-11-21 09:19:50,332 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-21 09:19:50,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4243d59e-1672-4b7e-89a2-d6fb92890c94/bin/uautomizer-vX5HgA9Q3a/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-21 09:20:24,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:20:25,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 2201 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-21 09:20:25,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:20:25,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-21 09:20:25,649 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-21 09:20:25,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-21 09:20:26,009 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-21 09:20:26,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-11-21 09:20:26,606 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2022-11-21 09:20:26,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2022-11-21 09:20:27,870 INFO L321 Elim1Store]: treesize reduction 88, result has 33.8 percent of original size [2022-11-21 09:20:27,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 75 [2022-11-21 09:20:28,781 INFO L321 Elim1Store]: treesize reduction 64, result has 31.2 percent of original size [2022-11-21 09:20:28,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 56 [2022-11-21 09:20:30,481 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 269 proven. 352 refuted. 0 times theorem prover too weak. 7594 trivial. 5435 not checked. [2022-11-21 09:20:30,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:21:08,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1284620136] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:21:08,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 09:21:08,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 28] total 52 [2022-11-21 09:21:08,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888308308] [2022-11-21 09:21:08,728 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 09:21:08,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-21 09:21:08,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 09:21:08,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-21 09:21:08,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=1627, Unknown=31, NotChecked=1386, Total=3422 [2022-11-21 09:21:08,730 INFO L87 Difference]: Start difference. First operand 317 states and 338 transitions. Second operand has 53 states, 47 states have (on average 2.8297872340425534) internal successors, (133), 43 states have internal predecessors, (133), 8 states have call successors, (10), 2 states have call predecessors, (10), 8 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11)