./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/prefixsum_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/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_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/verifythis/prefixsum_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 81bdf17d0130e934dcb31a2f76f595e947b99d6273334b7f05365a624466aeab --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-21 16:41:40,062 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:41:40,064 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:41:40,089 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:41:40,089 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:41:40,091 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:41:40,092 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:41:40,094 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:41:40,096 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:41:40,097 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:41:40,098 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:41:40,100 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:41:40,101 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:41:40,102 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:41:40,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:41:40,105 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:41:40,106 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:41:40,107 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:41:40,109 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:41:40,111 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:41:40,112 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:41:40,114 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:41:40,115 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:41:40,116 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:41:40,120 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:41:40,121 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:41:40,121 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:41:40,122 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:41:40,123 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:41:40,124 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:41:40,125 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:41:40,126 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:41:40,127 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:41:40,128 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:41:40,129 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:41:40,130 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:41:40,131 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:41:40,131 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:41:40,132 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:41:40,133 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:41:40,134 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:41:40,136 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 16:41:40,177 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:41:40,178 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:41:40,178 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:41:40,179 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:41:40,180 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:41:40,180 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:41:40,181 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:41:40,181 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:41:40,181 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:41:40,182 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:41:40,183 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:41:40,183 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:41:40,183 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:41:40,184 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:41:40,184 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:41:40,184 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:41:40,184 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:41:40,185 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:41:40,185 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:41:40,185 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:41:40,185 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:41:40,186 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:41:40,186 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:41:40,186 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:41:40,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:41:40,187 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:41:40,187 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:41:40,187 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:41:40,188 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:41:40,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:41:40,189 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:41:40,189 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:41:40,189 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:41:40,190 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_abb7963b-501f-43d0-b20a-414e23fa6476/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81bdf17d0130e934dcb31a2f76f595e947b99d6273334b7f05365a624466aeab [2022-11-21 16:41:40,512 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:41:40,556 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:41:40,559 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:41:40,561 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:41:40,561 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:41:40,563 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/verifythis/prefixsum_rec.c [2022-11-21 16:41:45,816 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:41:46,069 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:41:46,069 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/sv-benchmarks/c/verifythis/prefixsum_rec.c [2022-11-21 16:41:46,077 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/data/e3373e9dc/69e0c2fbcce44f40bdaa9b0901250aeb/FLAGa58a761b4 [2022-11-21 16:41:46,391 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/data/e3373e9dc/69e0c2fbcce44f40bdaa9b0901250aeb [2022-11-21 16:41:46,395 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:41:46,397 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:41:46,402 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:41:46,402 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:41:46,405 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:41:46,406 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:41:46" (1/1) ... [2022-11-21 16:41:46,407 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14f85051 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:41:46, skipping insertion in model container [2022-11-21 16:41:46,408 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:41:46" (1/1) ... [2022-11-21 16:41:46,415 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:41:46,431 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:41:46,590 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/sv-benchmarks/c/verifythis/prefixsum_rec.c[525,538] [2022-11-21 16:41:46,618 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:41:46,634 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:41:46,644 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/sv-benchmarks/c/verifythis/prefixsum_rec.c[525,538] [2022-11-21 16:41:46,661 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:41:46,675 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:41:46,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:41:46 WrapperNode [2022-11-21 16:41:46,676 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:41:46,677 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:41:46,677 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:41:46,677 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:41:46,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:41:46" (1/1) ... [2022-11-21 16:41:46,691 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:41:46" (1/1) ... [2022-11-21 16:41:46,712 INFO L138 Inliner]: procedures = 22, calls = 37, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 75 [2022-11-21 16:41:46,713 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:41:46,713 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:41:46,714 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:41:46,714 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:41:46,722 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:41:46" (1/1) ... [2022-11-21 16:41:46,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:41:46" (1/1) ... [2022-11-21 16:41:46,725 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:41:46" (1/1) ... [2022-11-21 16:41:46,726 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:41:46" (1/1) ... [2022-11-21 16:41:46,734 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:41:46" (1/1) ... [2022-11-21 16:41:46,743 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:41:46" (1/1) ... [2022-11-21 16:41:46,745 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:41:46" (1/1) ... [2022-11-21 16:41:46,750 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:41:46" (1/1) ... [2022-11-21 16:41:46,753 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:41:46,754 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:41:46,755 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:41:46,755 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:41:46,756 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:41:46" (1/1) ... [2022-11-21 16:41:46,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:41:46,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:41:46,793 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:41:46,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:41:46,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:41:46,838 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-21 16:41:46,839 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-21 16:41:46,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:41:46,840 INFO L130 BoogieDeclarations]: Found specification of procedure downsweep [2022-11-21 16:41:46,841 INFO L138 BoogieDeclarations]: Found implementation of procedure downsweep [2022-11-21 16:41:46,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 16:41:46,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-21 16:41:46,843 INFO L130 BoogieDeclarations]: Found specification of procedure upsweep [2022-11-21 16:41:46,847 INFO L138 BoogieDeclarations]: Found implementation of procedure upsweep [2022-11-21 16:41:46,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:41:46,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:41:46,848 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 16:41:46,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-21 16:41:46,848 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-21 16:41:46,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 16:41:46,933 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:41:46,935 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:41:47,220 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:41:47,227 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:41:47,228 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-21 16:41:47,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:41:47 BoogieIcfgContainer [2022-11-21 16:41:47,230 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:41:47,233 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:41:47,233 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:41:47,236 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:41:47,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:41:46" (1/3) ... [2022-11-21 16:41:47,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d962676 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:41:47, skipping insertion in model container [2022-11-21 16:41:47,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:41:46" (2/3) ... [2022-11-21 16:41:47,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d962676 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:41:47, skipping insertion in model container [2022-11-21 16:41:47,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:41:47" (3/3) ... [2022-11-21 16:41:47,240 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_rec.c [2022-11-21 16:41:47,260 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:41:47,260 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 16:41:47,312 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:41:47,319 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@69e1d7d8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:41:47,319 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-21 16:41:47,332 INFO L276 IsEmpty]: Start isEmpty. Operand has 49 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 36 states have internal predecessors, (44), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-21 16:41:47,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-21 16:41:47,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:41:47,348 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:41:47,349 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:41:47,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:41:47,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1639330660, now seen corresponding path program 1 times [2022-11-21 16:41:47,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:41:47,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422981157] [2022-11-21 16:41:47,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:41:47,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:41:47,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:47,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:41:47,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:47,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-21 16:41:47,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:47,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 16:41:47,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:47,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-21 16:41:47,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:47,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-21 16:41:47,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:47,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-21 16:41:47,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:47,741 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-21 16:41:47,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:41:47,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422981157] [2022-11-21 16:41:47,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422981157] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:41:47,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:41:47,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:41:47,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414370938] [2022-11-21 16:41:47,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:41:47,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:41:47,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:41:47,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:41:47,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:41:47,784 INFO L87 Difference]: Start difference. First operand has 49 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 36 states have internal predecessors, (44), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-21 16:41:47,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:41:47,875 INFO L93 Difference]: Finished difference Result 96 states and 127 transitions. [2022-11-21 16:41:47,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:41:47,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2022-11-21 16:41:47,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:41:47,886 INFO L225 Difference]: With dead ends: 96 [2022-11-21 16:41:47,887 INFO L226 Difference]: Without dead ends: 46 [2022-11-21 16:41:47,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:41:47,894 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 6 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:41:47,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 85 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:41:47,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-21 16:41:47,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-11-21 16:41:47,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-21 16:41:47,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2022-11-21 16:41:47,939 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 44 [2022-11-21 16:41:47,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:41:47,940 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2022-11-21 16:41:47,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-21 16:41:47,941 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2022-11-21 16:41:47,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-21 16:41:47,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:41:47,943 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:41:47,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:41:47,944 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:41:47,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:41:47,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1439199646, now seen corresponding path program 1 times [2022-11-21 16:41:47,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:41:47,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211410127] [2022-11-21 16:41:47,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:41:47,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:41:48,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:48,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:41:48,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:48,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-21 16:41:48,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:48,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 16:41:48,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:48,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-21 16:41:48,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:48,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-21 16:41:48,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:48,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-21 16:41:48,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:48,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-21 16:41:48,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:41:48,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211410127] [2022-11-21 16:41:48,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211410127] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:41:48,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:41:48,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 16:41:48,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916035035] [2022-11-21 16:41:48,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:41:48,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 16:41:48,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:41:48,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 16:41:48,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:41:48,582 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-21 16:41:48,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:41:48,873 INFO L93 Difference]: Finished difference Result 87 states and 110 transitions. [2022-11-21 16:41:48,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 16:41:48,874 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2022-11-21 16:41:48,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:41:48,881 INFO L225 Difference]: With dead ends: 87 [2022-11-21 16:41:48,881 INFO L226 Difference]: Without dead ends: 71 [2022-11-21 16:41:48,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-21 16:41:48,884 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 36 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:41:48,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 210 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:41:48,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-21 16:41:48,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2022-11-21 16:41:48,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 33 states have internal predecessors, (36), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-21 16:41:48,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2022-11-21 16:41:48,906 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 44 [2022-11-21 16:41:48,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:41:48,907 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2022-11-21 16:41:48,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-21 16:41:48,907 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2022-11-21 16:41:48,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-21 16:41:48,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:41:48,909 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:41:48,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 16:41:48,909 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:41:48,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:41:48,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1012024996, now seen corresponding path program 1 times [2022-11-21 16:41:48,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:41:48,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709668867] [2022-11-21 16:41:48,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:41:48,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:41:49,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:49,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:41:49,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:49,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-21 16:41:49,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:49,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 16:41:49,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:49,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-21 16:41:49,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:49,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-21 16:41:49,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:49,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-21 16:41:49,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:49,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 16:41:49,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:41:49,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709668867] [2022-11-21 16:41:49,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709668867] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:41:49,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802489783] [2022-11-21 16:41:49,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:41:49,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:41:49,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:41:49,274 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:41:49,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:41:49,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:49,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 16:41:49,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:41:49,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 16:41:49,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:41:49,797 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 16:41:49,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802489783] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:41:49,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:41:49,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-11-21 16:41:49,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065320317] [2022-11-21 16:41:49,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:41:49,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-21 16:41:49,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:41:49,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-21 16:41:49,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-21 16:41:49,800 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-21 16:41:50,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:41:50,049 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2022-11-21 16:41:50,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:41:50,050 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 46 [2022-11-21 16:41:50,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:41:50,051 INFO L225 Difference]: With dead ends: 73 [2022-11-21 16:41:50,052 INFO L226 Difference]: Without dead ends: 50 [2022-11-21 16:41:50,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-11-21 16:41:50,053 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 40 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:41:50,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 252 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:41:50,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-21 16:41:50,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2022-11-21 16:41:50,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-21 16:41:50,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2022-11-21 16:41:50,073 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 46 [2022-11-21 16:41:50,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:41:50,074 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2022-11-21 16:41:50,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-21 16:41:50,074 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2022-11-21 16:41:50,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-21 16:41:50,078 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:41:50,079 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:41:50,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 16:41:50,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-21 16:41:50,285 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:41:50,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:41:50,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1298139546, now seen corresponding path program 2 times [2022-11-21 16:41:50,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:41:50,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381566191] [2022-11-21 16:41:50,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:41:50,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:41:50,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:51,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:41:51,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:51,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-21 16:41:51,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:51,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 16:41:51,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:51,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-21 16:41:51,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:52,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-21 16:41:52,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:52,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-21 16:41:52,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:53,205 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 16:41:53,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:41:53,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381566191] [2022-11-21 16:41:53,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381566191] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:41:53,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917736625] [2022-11-21 16:41:53,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:41:53,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:41:53,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:41:53,214 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:41:53,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:41:53,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:41:53,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:41:53,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-21 16:41:53,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:41:53,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-21 16:41:53,587 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_123 Int) (downsweep_~left Int)) (and (= (store |c_old(#memory_int)| |c_downsweep_#in~a.base| (let ((.cse0 (select |c_old(#memory_int)| |c_downsweep_#in~a.base|)) (.cse1 (+ |c_downsweep_#in~a.offset| (* |c_downsweep_#in~right| 4)))) (store (store .cse0 .cse1 v_ArrVal_123) (+ |c_downsweep_#in~a.offset| (* downsweep_~left 4)) (select .cse0 .cse1)))) |c_#memory_int|) (<= downsweep_~left |c_downsweep_#in~left|) (not (< (+ downsweep_~left 1) |c_downsweep_#in~right|)))) is different from true [2022-11-21 16:41:53,654 INFO L321 Elim1Store]: treesize reduction 34, result has 26.1 percent of original size [2022-11-21 16:41:53,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 45 treesize of output 27 [2022-11-21 16:41:53,855 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-21 16:41:53,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 36 treesize of output 23 [2022-11-21 16:41:53,896 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-21 16:41:53,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:41:54,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917736625] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:41:54,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:41:54,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 28 [2022-11-21 16:41:54,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823064083] [2022-11-21 16:41:54,210 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:41:54,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-21 16:41:54,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:41:54,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-21 16:41:54,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=772, Unknown=1, NotChecked=56, Total=930 [2022-11-21 16:41:54,212 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 28 states, 25 states have (on average 2.16) internal successors, (54), 23 states have internal predecessors, (54), 7 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-21 16:41:58,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:41:58,349 INFO L93 Difference]: Finished difference Result 82 states and 99 transitions. [2022-11-21 16:41:58,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-21 16:41:58,350 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.16) internal successors, (54), 23 states have internal predecessors, (54), 7 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 48 [2022-11-21 16:41:58,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:41:58,352 INFO L225 Difference]: With dead ends: 82 [2022-11-21 16:41:58,352 INFO L226 Difference]: Without dead ends: 80 [2022-11-21 16:41:58,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=356, Invalid=2197, Unknown=1, NotChecked=98, Total=2652 [2022-11-21 16:41:58,355 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 156 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:41:58,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 278 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 661 Invalid, 0 Unknown, 78 Unchecked, 1.1s Time] [2022-11-21 16:41:58,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-21 16:41:58,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 53. [2022-11-21 16:41:58,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 37 states have (on average 1.135135135135135) internal successors, (42), 38 states have internal predecessors, (42), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (13), 11 states have call predecessors, (13), 10 states have call successors, (13) [2022-11-21 16:41:58,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2022-11-21 16:41:58,373 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 48 [2022-11-21 16:41:58,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:41:58,374 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2022-11-21 16:41:58,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.16) internal successors, (54), 23 states have internal predecessors, (54), 7 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-21 16:41:58,374 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2022-11-21 16:41:58,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-21 16:41:58,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:41:58,379 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:41:58,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-21 16:41:58,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:41:58,585 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:41:58,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:41:58,585 INFO L85 PathProgramCache]: Analyzing trace with hash 736701521, now seen corresponding path program 1 times [2022-11-21 16:41:58,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:41:58,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144749606] [2022-11-21 16:41:58,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:41:58,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:41:58,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:58,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:41:58,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:58,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-21 16:41:58,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:58,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 16:41:58,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:58,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-21 16:41:58,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:58,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-21 16:41:58,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:58,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-21 16:41:58,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:58,969 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 16:41:58,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:41:58,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144749606] [2022-11-21 16:41:58,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144749606] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:41:58,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926174248] [2022-11-21 16:41:58,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:41:58,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:41:58,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:41:58,972 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:41:58,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:41:59,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:41:59,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 115 conjunts are in the unsatisfiable core [2022-11-21 16:41:59,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:41:59,104 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 16:41:59,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-21 16:41:59,214 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-21 16:41:59,214 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 11 treesize of output 11 [2022-11-21 16:41:59,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-21 16:41:59,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-21 16:41:59,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-21 16:41:59,694 WARN L859 $PredicateComparison]: unable to prove that (exists ((upsweep_~right Int) (upsweep_~a.offset Int) (v_ArrVal_177 Int)) (and (<= |c_upsweep_#in~right| upsweep_~right) (<= upsweep_~right (+ |c_upsweep_#in~left| 1)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_upsweep_#in~a.base| (store (select |c_old(#memory_int)| |c_upsweep_#in~a.base|) (+ (* upsweep_~right 4) upsweep_~a.offset) v_ArrVal_177))) (<= |c_upsweep_#in~a.offset| upsweep_~a.offset))) is different from true [2022-11-21 16:41:59,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 39 treesize of output 35 [2022-11-21 16:41:59,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 46 treesize of output 44 [2022-11-21 16:42:00,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 131 treesize of output 123 [2022-11-21 16:42:01,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 121 [2022-11-21 16:42:01,437 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 16:42:01,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:42:38,541 WARN L233 SmtUtils]: Spent 8.12s on a formula simplification. DAG size of input: 59 DAG size of output: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:42:38,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926174248] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:42:38,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:42:38,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 28] total 35 [2022-11-21 16:42:38,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711654408] [2022-11-21 16:42:38,543 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:42:38,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-21 16:42:38,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:42:38,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-21 16:42:38,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1570, Unknown=13, NotChecked=80, Total=1806 [2022-11-21 16:42:38,544 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand has 35 states, 31 states have (on average 2.096774193548387) internal successors, (65), 29 states have internal predecessors, (65), 7 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-21 16:42:43,157 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((upsweep_~right Int) (upsweep_~a.offset Int) (v_ArrVal_177 Int)) (and (<= |c_upsweep_#in~right| upsweep_~right) (<= upsweep_~right (+ |c_upsweep_#in~left| 1)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_upsweep_#in~a.base| (store (select |c_old(#memory_int)| |c_upsweep_#in~a.base|) (+ (* upsweep_~right 4) upsweep_~a.offset) v_ArrVal_177))) (<= |c_upsweep_#in~a.offset| upsweep_~a.offset))) (exists ((|v_ULTIMATE.start_main_#t~malloc15#1.base_BEFORE_CALL_1| Int)) (= (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc15#1.base_BEFORE_CALL_1|) 1))) is different from true [2022-11-21 16:42:46,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:42:46,781 INFO L93 Difference]: Finished difference Result 133 states and 172 transitions. [2022-11-21 16:42:46,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-21 16:42:46,782 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 31 states have (on average 2.096774193548387) internal successors, (65), 29 states have internal predecessors, (65), 7 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 52 [2022-11-21 16:42:46,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:42:46,783 INFO L225 Difference]: With dead ends: 133 [2022-11-21 16:42:46,783 INFO L226 Difference]: Without dead ends: 105 [2022-11-21 16:42:46,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 44.1s TimeCoverageRelationStatistics Valid=701, Invalid=5612, Unknown=15, NotChecked=314, Total=6642 [2022-11-21 16:42:46,787 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 170 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:42:46,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 244 Invalid, 1411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1185 Invalid, 0 Unknown, 127 Unchecked, 2.3s Time] [2022-11-21 16:42:46,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-21 16:42:46,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 84. [2022-11-21 16:42:46,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 62 states have internal predecessors, (68), 15 states have call successors, (15), 5 states have call predecessors, (15), 7 states have return successors, (22), 16 states have call predecessors, (22), 15 states have call successors, (22) [2022-11-21 16:42:46,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2022-11-21 16:42:46,811 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 52 [2022-11-21 16:42:46,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:42:46,811 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2022-11-21 16:42:46,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 31 states have (on average 2.096774193548387) internal successors, (65), 29 states have internal predecessors, (65), 7 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-21 16:42:46,812 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2022-11-21 16:42:46,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-21 16:42:46,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:42:46,813 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:42:46,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 16:42:47,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:42:47,020 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:42:47,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:42:47,020 INFO L85 PathProgramCache]: Analyzing trace with hash -362686961, now seen corresponding path program 2 times [2022-11-21 16:42:47,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:42:47,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46195337] [2022-11-21 16:42:47,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:42:47,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:42:47,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:42:47,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:42:47,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:42:47,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-21 16:42:47,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:42:47,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 16:42:47,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:42:47,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-21 16:42:47,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:42:47,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-21 16:42:47,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:42:47,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-21 16:42:47,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:42:47,279 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 16:42:47,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:42:47,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46195337] [2022-11-21 16:42:47,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46195337] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:42:47,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728904819] [2022-11-21 16:42:47,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:42:47,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:42:47,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:42:47,284 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:42:47,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 16:42:47,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:42:47,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:42:47,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 16:42:47,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:42:47,481 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 16:42:47,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:42:47,679 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 16:42:47,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728904819] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:42:47,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:42:47,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 15 [2022-11-21 16:42:47,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583559539] [2022-11-21 16:42:47,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:42:47,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-21 16:42:47,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:42:47,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-21 16:42:47,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-21 16:42:47,683 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-21 16:42:48,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:42:48,078 INFO L93 Difference]: Finished difference Result 113 states and 141 transitions. [2022-11-21 16:42:48,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 16:42:48,078 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2022-11-21 16:42:48,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:42:48,080 INFO L225 Difference]: With dead ends: 113 [2022-11-21 16:42:48,080 INFO L226 Difference]: Without dead ends: 93 [2022-11-21 16:42:48,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 110 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-11-21 16:42:48,081 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 37 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:42:48,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 331 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:42:48,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-21 16:42:48,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 86. [2022-11-21 16:42:48,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 63 states have internal predecessors, (69), 16 states have call successors, (16), 5 states have call predecessors, (16), 7 states have return successors, (22), 17 states have call predecessors, (22), 16 states have call successors, (22) [2022-11-21 16:42:48,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 107 transitions. [2022-11-21 16:42:48,126 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 107 transitions. Word has length 54 [2022-11-21 16:42:48,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:42:48,135 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 107 transitions. [2022-11-21 16:42:48,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-21 16:42:48,136 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 107 transitions. [2022-11-21 16:42:48,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-21 16:42:48,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:42:48,137 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:42:48,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 16:42:48,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:42:48,338 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:42:48,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:42:48,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1333958502, now seen corresponding path program 1 times [2022-11-21 16:42:48,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:42:48,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345918914] [2022-11-21 16:42:48,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:42:48,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:42:48,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:42:48,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:42:48,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:42:48,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 16:42:48,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:42:48,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-21 16:42:48,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:42:48,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-21 16:42:48,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:42:48,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-21 16:42:48,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:42:48,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-21 16:42:48,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:42:48,635 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-21 16:42:48,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:42:48,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345918914] [2022-11-21 16:42:48,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345918914] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:42:48,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068659958] [2022-11-21 16:42:48,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:42:48,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:42:48,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:42:48,640 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:42:48,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 16:42:48,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:42:48,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-21 16:42:48,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:42:48,847 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-21 16:42:48,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:42:48,947 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-21 16:42:48,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068659958] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:42:48,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:42:48,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 16 [2022-11-21 16:42:48,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098825598] [2022-11-21 16:42:48,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:42:48,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-21 16:42:48,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:42:48,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-21 16:42:48,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-11-21 16:42:48,949 INFO L87 Difference]: Start difference. First operand 86 states and 107 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-21 16:42:49,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:42:49,273 INFO L93 Difference]: Finished difference Result 122 states and 146 transitions. [2022-11-21 16:42:49,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 16:42:49,274 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 57 [2022-11-21 16:42:49,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:42:49,275 INFO L225 Difference]: With dead ends: 122 [2022-11-21 16:42:49,275 INFO L226 Difference]: Without dead ends: 100 [2022-11-21 16:42:49,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 115 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-11-21 16:42:49,277 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 70 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:42:49,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 267 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:42:49,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-21 16:42:49,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2022-11-21 16:42:49,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 61 states have internal predecessors, (68), 15 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (20), 16 states have call predecessors, (20), 15 states have call successors, (20) [2022-11-21 16:42:49,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 103 transitions. [2022-11-21 16:42:49,320 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 103 transitions. Word has length 57 [2022-11-21 16:42:49,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:42:49,321 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 103 transitions. [2022-11-21 16:42:49,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-21 16:42:49,321 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 103 transitions. [2022-11-21 16:42:49,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-21 16:42:49,323 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:42:49,323 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:42:49,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-21 16:42:49,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-21 16:42:49,529 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:42:49,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:42:49,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1099509749, now seen corresponding path program 1 times [2022-11-21 16:42:49,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:42:49,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737505247] [2022-11-21 16:42:49,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:42:49,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:42:49,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:42:49,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:42:49,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:42:49,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 16:42:49,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:42:49,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-21 16:42:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:42:49,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-21 16:42:49,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:42:49,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-21 16:42:49,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:42:49,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:42:49,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:42:49,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-21 16:42:49,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:42:49,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-21 16:42:49,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:42:49,774 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-21 16:42:49,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:42:49,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737505247] [2022-11-21 16:42:49,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737505247] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:42:49,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713974778] [2022-11-21 16:42:49,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:42:49,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:42:49,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:42:49,776 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:42:49,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 16:42:49,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:42:49,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-21 16:42:49,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:42:50,021 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-21 16:42:50,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:42:50,404 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-21 16:42:50,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713974778] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:42:50,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:42:50,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-11-21 16:42:50,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036691033] [2022-11-21 16:42:50,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:42:50,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-21 16:42:50,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:42:50,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-21 16:42:50,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-11-21 16:42:50,406 INFO L87 Difference]: Start difference. First operand 82 states and 103 transitions. Second operand has 20 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 19 states have internal predecessors, (62), 7 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) [2022-11-21 16:42:50,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:42:50,654 INFO L93 Difference]: Finished difference Result 93 states and 116 transitions. [2022-11-21 16:42:50,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 16:42:50,655 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 19 states have internal predecessors, (62), 7 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) Word has length 65 [2022-11-21 16:42:50,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:42:50,656 INFO L225 Difference]: With dead ends: 93 [2022-11-21 16:42:50,656 INFO L226 Difference]: Without dead ends: 70 [2022-11-21 16:42:50,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-11-21 16:42:50,657 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 25 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:42:50,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 219 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:42:50,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-21 16:42:50,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 55. [2022-11-21 16:42:50,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.131578947368421) internal successors, (43), 40 states have internal predecessors, (43), 10 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2022-11-21 16:42:50,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2022-11-21 16:42:50,671 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 65 [2022-11-21 16:42:50,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:42:50,671 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2022-11-21 16:42:50,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 19 states have internal predecessors, (62), 7 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) [2022-11-21 16:42:50,672 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2022-11-21 16:42:50,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-21 16:42:50,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:42:50,673 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:42:50,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 16:42:50,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:42:50,878 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:42:50,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:42:50,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1124650442, now seen corresponding path program 1 times [2022-11-21 16:42:50,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:42:50,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938965416] [2022-11-21 16:42:50,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:42:50,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:42:50,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:42:51,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:42:51,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:42:51,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-21 16:42:51,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:42:51,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 16:42:51,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:42:51,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-21 16:42:51,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:42:51,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-21 16:42:51,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:42:51,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:42:51,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:42:51,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-21 16:42:51,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:42:51,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-21 16:42:51,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:42:51,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:42:51,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:42:51,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-21 16:42:51,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:42:51,354 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-21 16:42:51,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:42:51,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938965416] [2022-11-21 16:42:51,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938965416] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:42:51,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041998665] [2022-11-21 16:42:51,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:42:51,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:42:51,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:42:51,357 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:42:51,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 16:42:51,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:42:51,513 WARN L261 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 176 conjunts are in the unsatisfiable core [2022-11-21 16:42:51,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:42:51,580 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 16:42:51,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-21 16:42:51,722 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-21 16:42:51,723 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 11 treesize of output 11 [2022-11-21 16:42:51,759 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_417 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.meminit_#ptr.base| v_ArrVal_417) |c_#memory_int|)) is different from true [2022-11-21 16:42:51,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2022-11-21 16:42:51,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2022-11-21 16:42:51,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2022-11-21 16:42:51,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2022-11-21 16:42:52,196 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_421 Int)) (= (store |c_old(#memory_int)| |c_upsweep_#in~a.base| (store (select |c_old(#memory_int)| |c_upsweep_#in~a.base|) (+ (* |c_upsweep_#in~right| 4) |c_upsweep_#in~a.offset|) v_ArrVal_421)) |c_#memory_int|)) is different from true [2022-11-21 16:42:52,309 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_423 Int)) (= (store |c_old(#memory_int)| |c_upsweep_#in~a.base| (store (select |c_old(#memory_int)| |c_upsweep_#in~a.base|) (+ (* |c_upsweep_#in~right| 4) |c_upsweep_#in~a.offset|) v_ArrVal_423)) |c_#memory_int|)) is different from true [2022-11-21 16:42:52,427 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_421 Int) (v_ArrVal_426 Int)) (= (store |c_old(#memory_int)| |c_upsweep_#in~a.base| (store (store (select |c_old(#memory_int)| |c_upsweep_#in~a.base|) (+ |c_upsweep_#in~a.offset| (* 4 |c_upsweep_#in~left|)) v_ArrVal_421) (+ (* |c_upsweep_#in~right| 4) |c_upsweep_#in~a.offset|) v_ArrVal_426)) |c_#memory_int|)) is different from true [2022-11-21 16:42:52,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 33 treesize of output 28 [2022-11-21 16:42:52,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 41 treesize of output 36 [2022-11-21 16:42:52,837 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_432 Int) (downsweep_~left Int)) (and (= |c_#memory_int| (store |c_old(#memory_int)| |c_downsweep_#in~a.base| (let ((.cse2 (+ |c_downsweep_#in~a.offset| (* downsweep_~left 4)))) (store (let ((.cse1 (+ |c_downsweep_#in~a.offset| (* |c_downsweep_#in~right| 4))) (.cse0 (select |c_old(#memory_int)| |c_downsweep_#in~a.base|))) (store .cse0 .cse1 (+ (select .cse0 .cse1) (select .cse0 .cse2)))) .cse2 v_ArrVal_432)))) (<= downsweep_~left |c_downsweep_#in~left|))) is different from true [2022-11-21 16:42:53,037 WARN L859 $PredicateComparison]: unable to prove that (exists ((downsweep_~left Int) (downsweep_~right Int) (v_ArrVal_437 Int) (downsweep_~a.offset Int) (v_ArrVal_435 Int)) (and (= (store |c_old(#memory_int)| |c_downsweep_#in~a.base| (store (store (select |c_old(#memory_int)| |c_downsweep_#in~a.base|) (+ downsweep_~a.offset (* downsweep_~right 4)) v_ArrVal_435) (+ downsweep_~a.offset (* downsweep_~left 4)) v_ArrVal_437)) |c_#memory_int|) (<= |c_downsweep_#in~right| downsweep_~right) (<= |c_downsweep_#in~left| downsweep_~left) (<= |c_downsweep_#in~a.offset| downsweep_~a.offset))) is different from true [2022-11-21 16:42:55,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 156 treesize of output 145 [2022-11-21 16:42:57,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 141 [2022-11-21 16:42:57,470 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 17 not checked. [2022-11-21 16:42:57,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:42:59,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041998665] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:42:59,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:42:59,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 37] total 46 [2022-11-21 16:42:59,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957583407] [2022-11-21 16:42:59,373 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:42:59,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-21 16:42:59,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:42:59,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-21 16:42:59,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1769, Unknown=7, NotChecked=534, Total=2450 [2022-11-21 16:42:59,376 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 46 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 13 states have call successors, (19), 3 states have call predecessors, (19), 10 states have return successors, (19), 11 states have call predecessors, (19), 13 states have call successors, (19) [2022-11-21 16:43:04,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:43:08,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:43:17,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:43:17,114 INFO L93 Difference]: Finished difference Result 137 states and 183 transitions. [2022-11-21 16:43:17,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-21 16:43:17,115 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 13 states have call successors, (19), 3 states have call predecessors, (19), 10 states have return successors, (19), 11 states have call predecessors, (19), 13 states have call successors, (19) Word has length 72 [2022-11-21 16:43:17,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:43:17,117 INFO L225 Difference]: With dead ends: 137 [2022-11-21 16:43:17,117 INFO L226 Difference]: Without dead ends: 109 [2022-11-21 16:43:17,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1558 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=725, Invalid=7121, Unknown=10, NotChecked=1074, Total=8930 [2022-11-21 16:43:17,120 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 265 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 1697 mSolverCounterSat, 149 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 2529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1697 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 681 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-11-21 16:43:17,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 378 Invalid, 2529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1697 Invalid, 2 Unknown, 681 Unchecked, 8.6s Time] [2022-11-21 16:43:17,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-21 16:43:17,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2022-11-21 16:43:17,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 62 states have internal predecessors, (67), 17 states have call successors, (17), 4 states have call predecessors, (17), 8 states have return successors, (33), 19 states have call predecessors, (33), 17 states have call successors, (33) [2022-11-21 16:43:17,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 117 transitions. [2022-11-21 16:43:17,148 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 117 transitions. Word has length 72 [2022-11-21 16:43:17,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:43:17,148 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 117 transitions. [2022-11-21 16:43:17,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 13 states have call successors, (19), 3 states have call predecessors, (19), 10 states have return successors, (19), 11 states have call predecessors, (19), 13 states have call successors, (19) [2022-11-21 16:43:17,149 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 117 transitions. [2022-11-21 16:43:17,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-21 16:43:17,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:43:17,150 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:43:17,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-21 16:43:17,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abb7963b-501f-43d0-b20a-414e23fa6476/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:43:17,350 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:43:17,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:43:17,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1763257480, now seen corresponding path program 2 times [2022-11-21 16:43:17,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:43:17,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275267670] [2022-11-21 16:43:17,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:43:17,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:43:17,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:43:27,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:43:27,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:43:27,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-21 16:43:27,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:43:27,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 16:43:27,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:43:27,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-21 16:43:27,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:43:27,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-21 16:43:27,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:43:28,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:43:28,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:43:28,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-21 16:43:28,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:43:29,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-21 16:43:31,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat