./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum_const3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-crafted/zero_sum_const3.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 4a8466707e2bff30c44c48996d40a42275ef25007ed8ba21de1de20ade9b7ba9 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 23:56:37,713 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 23:56:37,715 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 23:56:37,748 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 23:56:37,756 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 23:56:37,758 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 23:56:37,759 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 23:56:37,762 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 23:56:37,763 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 23:56:37,764 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 23:56:37,765 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 23:56:37,766 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 23:56:37,766 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 23:56:37,767 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 23:56:37,768 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 23:56:37,769 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 23:56:37,770 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 23:56:37,771 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 23:56:37,773 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 23:56:37,774 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 23:56:37,776 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 23:56:37,783 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 23:56:37,785 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 23:56:37,786 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 23:56:37,797 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 23:56:37,803 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 23:56:37,803 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 23:56:37,804 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 23:56:37,805 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 23:56:37,806 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 23:56:37,807 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 23:56:37,807 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 23:56:37,808 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 23:56:37,809 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 23:56:37,810 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 23:56:37,811 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 23:56:37,812 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 23:56:37,812 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 23:56:37,813 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 23:56:37,813 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 23:56:37,814 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 23:56:37,815 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 23:56:37,844 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 23:56:37,844 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 23:56:37,845 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 23:56:37,845 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 23:56:37,846 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 23:56:37,846 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 23:56:37,847 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 23:56:37,847 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 23:56:37,847 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 23:56:37,847 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 23:56:37,848 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 23:56:37,848 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 23:56:37,848 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 23:56:37,849 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 23:56:37,849 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 23:56:37,849 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 23:56:37,849 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 23:56:37,849 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 23:56:37,850 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 23:56:37,850 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 23:56:37,850 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 23:56:37,850 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 23:56:37,850 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 23:56:37,851 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 23:56:37,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 23:56:37,851 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 23:56:37,851 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 23:56:37,852 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 23:56:37,852 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 23:56:37,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 23:56:37,853 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 23:56:37,853 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 23:56:37,853 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 23:56:37,854 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 23:56:37,854 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4a8466707e2bff30c44c48996d40a42275ef25007ed8ba21de1de20ade9b7ba9 [2021-12-16 23:56:38,115 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 23:56:38,144 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 23:56:38,146 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 23:56:38,147 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 23:56:38,148 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 23:56:38,149 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_const3.c [2021-12-16 23:56:38,209 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d2406107/64523038a5764093b0ba9be2c3ea1123/FLAGa810b0e4a [2021-12-16 23:56:38,684 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 23:56:38,685 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const3.c [2021-12-16 23:56:38,694 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d2406107/64523038a5764093b0ba9be2c3ea1123/FLAGa810b0e4a [2021-12-16 23:56:38,718 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d2406107/64523038a5764093b0ba9be2c3ea1123 [2021-12-16 23:56:38,720 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 23:56:38,723 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 23:56:38,726 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 23:56:38,726 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 23:56:38,729 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 23:56:38,729 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 11:56:38" (1/1) ... [2021-12-16 23:56:38,730 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@290f5806 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:56:38, skipping insertion in model container [2021-12-16 23:56:38,731 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 11:56:38" (1/1) ... [2021-12-16 23:56:38,736 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 23:56:38,750 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 23:56:38,897 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const3.c[406,419] [2021-12-16 23:56:38,912 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 23:56:38,922 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 23:56:38,936 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const3.c[406,419] [2021-12-16 23:56:38,952 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 23:56:38,962 INFO L208 MainTranslator]: Completed translation [2021-12-16 23:56:38,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:56:38 WrapperNode [2021-12-16 23:56:38,963 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 23:56:38,963 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 23:56:38,964 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 23:56:38,964 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 23:56:38,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:56:38" (1/1) ... [2021-12-16 23:56:38,974 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:56:38" (1/1) ... [2021-12-16 23:56:38,999 INFO L137 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 104 [2021-12-16 23:56:39,000 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 23:56:39,001 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 23:56:39,001 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 23:56:39,001 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 23:56:39,008 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:56:38" (1/1) ... [2021-12-16 23:56:39,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:56:38" (1/1) ... [2021-12-16 23:56:39,020 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:56:38" (1/1) ... [2021-12-16 23:56:39,021 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:56:38" (1/1) ... [2021-12-16 23:56:39,029 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:56:38" (1/1) ... [2021-12-16 23:56:39,035 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:56:38" (1/1) ... [2021-12-16 23:56:39,041 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:56:38" (1/1) ... [2021-12-16 23:56:39,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 23:56:39,049 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 23:56:39,051 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 23:56:39,051 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 23:56:39,053 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:56:38" (1/1) ... [2021-12-16 23:56:39,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 23:56:39,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:56:39,078 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-16 23:56:39,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-16 23:56:39,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 23:56:39,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 23:56:39,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 23:56:39,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 23:56:39,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 23:56:39,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 23:56:39,109 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 23:56:39,176 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 23:56:39,178 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 23:56:39,406 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 23:56:39,411 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 23:56:39,412 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-12-16 23:56:39,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 11:56:39 BoogieIcfgContainer [2021-12-16 23:56:39,414 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 23:56:39,415 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 23:56:39,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 23:56:39,418 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 23:56:39,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 11:56:38" (1/3) ... [2021-12-16 23:56:39,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51988900 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 11:56:39, skipping insertion in model container [2021-12-16 23:56:39,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:56:38" (2/3) ... [2021-12-16 23:56:39,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51988900 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 11:56:39, skipping insertion in model container [2021-12-16 23:56:39,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 11:56:39" (3/3) ... [2021-12-16 23:56:39,421 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const3.c [2021-12-16 23:56:39,425 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 23:56:39,435 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 23:56:39,495 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 23:56:39,503 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=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, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 23:56:39,503 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 23:56:39,527 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:56:39,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-16 23:56:39,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:56:39,535 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:56:39,536 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:56:39,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:56:39,541 INFO L85 PathProgramCache]: Analyzing trace with hash 534528496, now seen corresponding path program 1 times [2021-12-16 23:56:39,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:56:39,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487595626] [2021-12-16 23:56:39,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:56:39,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:56:39,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:56:39,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:56:39,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:56:39,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487595626] [2021-12-16 23:56:39,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487595626] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 23:56:39,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 23:56:39,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 23:56:39,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227085042] [2021-12-16 23:56:39,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 23:56:39,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 23:56:39,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:56:39,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 23:56:39,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 23:56:39,752 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:56:39,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:56:39,774 INFO L93 Difference]: Finished difference Result 59 states and 86 transitions. [2021-12-16 23:56:39,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 23:56:39,777 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-16 23:56:39,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:56:39,784 INFO L225 Difference]: With dead ends: 59 [2021-12-16 23:56:39,784 INFO L226 Difference]: Without dead ends: 27 [2021-12-16 23:56:39,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 23:56:39,791 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 23:56:39,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 23:56:39,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-16 23:56:39,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-16 23:56:39,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:56:39,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-12-16 23:56:39,824 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 19 [2021-12-16 23:56:39,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:56:39,824 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-12-16 23:56:39,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:56:39,825 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-12-16 23:56:39,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-16 23:56:39,826 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:56:39,826 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:56:39,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 23:56:39,827 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:56:39,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:56:39,829 INFO L85 PathProgramCache]: Analyzing trace with hash -697412484, now seen corresponding path program 1 times [2021-12-16 23:56:39,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:56:39,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161778516] [2021-12-16 23:56:39,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:56:39,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:56:39,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:56:39,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:56:39,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:56:39,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161778516] [2021-12-16 23:56:39,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161778516] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 23:56:39,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 23:56:39,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 23:56:39,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946689719] [2021-12-16 23:56:39,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 23:56:39,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 23:56:39,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:56:39,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 23:56:39,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 23:56:39,925 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:56:39,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:56:39,988 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2021-12-16 23:56:39,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 23:56:39,989 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-16 23:56:39,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:56:39,990 INFO L225 Difference]: With dead ends: 51 [2021-12-16 23:56:39,990 INFO L226 Difference]: Without dead ends: 29 [2021-12-16 23:56:39,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 23:56:39,996 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 23:56:39,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 34 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 23:56:39,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-16 23:56:40,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-12-16 23:56:40,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:56:40,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-12-16 23:56:40,006 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 19 [2021-12-16 23:56:40,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:56:40,007 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-12-16 23:56:40,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:56:40,008 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-12-16 23:56:40,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-16 23:56:40,011 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:56:40,011 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:56:40,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 23:56:40,012 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:56:40,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:56:40,013 INFO L85 PathProgramCache]: Analyzing trace with hash -506383970, now seen corresponding path program 1 times [2021-12-16 23:56:40,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:56:40,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649195404] [2021-12-16 23:56:40,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:56:40,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:56:40,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:56:40,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 23:56:40,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:56:40,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649195404] [2021-12-16 23:56:40,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649195404] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 23:56:40,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 23:56:40,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 23:56:40,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19951183] [2021-12-16 23:56:40,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 23:56:40,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 23:56:40,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:56:40,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 23:56:40,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 23:56:40,090 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:56:40,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:56:40,172 INFO L93 Difference]: Finished difference Result 60 states and 76 transitions. [2021-12-16 23:56:40,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 23:56:40,173 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-16 23:56:40,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:56:40,174 INFO L225 Difference]: With dead ends: 60 [2021-12-16 23:56:40,174 INFO L226 Difference]: Without dead ends: 41 [2021-12-16 23:56:40,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 23:56:40,181 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 23:56:40,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 15 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 23:56:40,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-16 23:56:40,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2021-12-16 23:56:40,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:56:40,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-12-16 23:56:40,197 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 21 [2021-12-16 23:56:40,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:56:40,198 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-12-16 23:56:40,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:56:40,198 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-12-16 23:56:40,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-16 23:56:40,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:56:40,200 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:56:40,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 23:56:40,201 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:56:40,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:56:40,201 INFO L85 PathProgramCache]: Analyzing trace with hash 615846698, now seen corresponding path program 1 times [2021-12-16 23:56:40,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:56:40,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103259769] [2021-12-16 23:56:40,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:56:40,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:56:40,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:56:40,306 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 23:56:40,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:56:40,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103259769] [2021-12-16 23:56:40,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103259769] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:56:40,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285658484] [2021-12-16 23:56:40,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:56:40,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:56:40,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:56:40,312 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:56:40,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 23:56:40,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:56:40,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 23:56:40,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:56:40,551 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 23:56:40,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:56:40,660 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 23:56:40,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285658484] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:56:40,661 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:56:40,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-16 23:56:40,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019530148] [2021-12-16 23:56:40,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:56:40,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 23:56:40,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:56:40,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 23:56:40,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-16 23:56:40,664 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:56:40,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:56:40,727 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2021-12-16 23:56:40,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 23:56:40,728 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-16 23:56:40,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:56:40,728 INFO L225 Difference]: With dead ends: 65 [2021-12-16 23:56:40,728 INFO L226 Difference]: Without dead ends: 37 [2021-12-16 23:56:40,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-16 23:56:40,731 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 23:56:40,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 34 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 23:56:40,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-16 23:56:40,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-12-16 23:56:40,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:56:40,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-12-16 23:56:40,737 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 33 [2021-12-16 23:56:40,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:56:40,737 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-12-16 23:56:40,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:56:40,738 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-12-16 23:56:40,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-16 23:56:40,739 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:56:40,739 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 23:56:40,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 23:56:40,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:56:40,966 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:56:40,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:56:40,967 INFO L85 PathProgramCache]: Analyzing trace with hash -160084788, now seen corresponding path program 2 times [2021-12-16 23:56:40,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:56:40,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142091269] [2021-12-16 23:56:40,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:56:40,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:56:40,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:56:41,024 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 23:56:41,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:56:41,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142091269] [2021-12-16 23:56:41,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142091269] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:56:41,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107567863] [2021-12-16 23:56:41,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 23:56:41,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:56:41,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:56:41,027 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:56:41,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 23:56:41,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 23:56:41,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:56:41,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 23:56:41,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:56:41,173 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 23:56:41,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:56:41,248 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 23:56:41,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107567863] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:56:41,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:56:41,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-16 23:56:41,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243457134] [2021-12-16 23:56:41,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:56:41,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 23:56:41,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:56:41,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 23:56:41,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-12-16 23:56:41,252 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:56:41,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:56:41,380 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2021-12-16 23:56:41,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 23:56:41,381 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-16 23:56:41,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:56:41,381 INFO L225 Difference]: With dead ends: 79 [2021-12-16 23:56:41,381 INFO L226 Difference]: Without dead ends: 55 [2021-12-16 23:56:41,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2021-12-16 23:56:41,383 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 23:56:41,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 18 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 23:56:41,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-16 23:56:41,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2021-12-16 23:56:41,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:56:41,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-12-16 23:56:41,388 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 35 [2021-12-16 23:56:41,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:56:41,389 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-12-16 23:56:41,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:56:41,389 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-12-16 23:56:41,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-16 23:56:41,390 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:56:41,390 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2021-12-16 23:56:41,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 23:56:41,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:56:41,614 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:56:41,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:56:41,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1337652904, now seen corresponding path program 3 times [2021-12-16 23:56:41,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:56:41,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767115093] [2021-12-16 23:56:41,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:56:41,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:56:41,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:56:42,789 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:56:42,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:56:42,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767115093] [2021-12-16 23:56:42,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767115093] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:56:42,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946946063] [2021-12-16 23:56:42,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 23:56:42,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:56:42,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:56:42,791 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:56:42,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 23:56:42,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-16 23:56:42,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:56:42,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-16 23:56:42,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:56:44,430 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 23:56:44,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 16 [2021-12-16 23:56:44,622 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:56:44,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:56:48,721 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 23:56:48,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 103 [2021-12-16 23:56:50,262 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:56:50,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946946063] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:56:50,263 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:56:50,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26, 29] total 66 [2021-12-16 23:56:50,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825962922] [2021-12-16 23:56:50,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:56:50,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-16 23:56:50,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:56:50,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-16 23:56:50,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=3851, Unknown=0, NotChecked=0, Total=4290 [2021-12-16 23:56:50,270 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 66 states, 66 states have (on average 2.015151515151515) internal successors, (133), 66 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:56:53,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:56:53,915 INFO L93 Difference]: Finished difference Result 166 states and 192 transitions. [2021-12-16 23:56:53,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-16 23:56:53,916 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.015151515151515) internal successors, (133), 66 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-16 23:56:53,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:56:53,918 INFO L225 Difference]: With dead ends: 166 [2021-12-16 23:56:53,918 INFO L226 Difference]: Without dead ends: 158 [2021-12-16 23:56:53,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 47 SyntacticMatches, 31 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 9 DeprecatedPredicates, 4689 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1283, Invalid=12523, Unknown=0, NotChecked=0, Total=13806 [2021-12-16 23:56:53,924 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 100 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 930 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 23:56:53,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 119 Invalid, 1736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 695 Invalid, 0 Unknown, 930 Unchecked, 0.4s Time] [2021-12-16 23:56:53,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-12-16 23:56:53,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 77. [2021-12-16 23:56:53,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 76 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:56:53,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2021-12-16 23:56:53,934 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 47 [2021-12-16 23:56:53,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:56:53,934 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2021-12-16 23:56:53,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.015151515151515) internal successors, (133), 66 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:56:53,935 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2021-12-16 23:56:53,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-16 23:56:53,936 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:56:53,936 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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] [2021-12-16 23:56:53,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 23:56:54,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:56:54,152 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:56:54,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:56:54,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1235984134, now seen corresponding path program 4 times [2021-12-16 23:56:54,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:56:54,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900323353] [2021-12-16 23:56:54,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:56:54,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:56:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:56:54,240 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-16 23:56:54,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:56:54,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900323353] [2021-12-16 23:56:54,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900323353] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:56:54,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002077763] [2021-12-16 23:56:54,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 23:56:54,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:56:54,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:56:54,244 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:56:54,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 23:56:54,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 23:56:54,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:56:54,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 23:56:54,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:56:54,418 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-16 23:56:54,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:56:54,516 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-16 23:56:54,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002077763] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:56:54,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:56:54,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-16 23:56:54,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059033100] [2021-12-16 23:56:54,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:56:54,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 23:56:54,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:56:54,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 23:56:54,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-16 23:56:54,518 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:56:54,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:56:54,733 INFO L93 Difference]: Finished difference Result 177 states and 202 transitions. [2021-12-16 23:56:54,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 23:56:54,734 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-16 23:56:54,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:56:54,735 INFO L225 Difference]: With dead ends: 177 [2021-12-16 23:56:54,735 INFO L226 Difference]: Without dead ends: 104 [2021-12-16 23:56:54,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-12-16 23:56:54,736 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 127 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 23:56:54,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 39 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 23:56:54,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-16 23:56:54,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2021-12-16 23:56:54,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 83 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:56:54,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2021-12-16 23:56:54,745 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 49 [2021-12-16 23:56:54,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:56:54,745 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2021-12-16 23:56:54,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:56:54,745 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2021-12-16 23:56:54,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-16 23:56:54,746 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:56:54,746 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-12-16 23:56:54,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 23:56:54,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:56:54,959 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:56:54,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:56:54,960 INFO L85 PathProgramCache]: Analyzing trace with hash -925733540, now seen corresponding path program 5 times [2021-12-16 23:56:54,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:56:54,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032862619] [2021-12-16 23:56:54,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:56:54,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:56:54,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:56:55,030 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-16 23:56:55,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:56:55,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032862619] [2021-12-16 23:56:55,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032862619] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:56:55,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893785621] [2021-12-16 23:56:55,031 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 23:56:55,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:56:55,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:56:55,032 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:56:55,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 23:56:55,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-16 23:56:55,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:56:55,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 23:56:55,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:56:55,235 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-16 23:56:55,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:56:55,330 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-16 23:56:55,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893785621] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:56:55,330 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:56:55,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-16 23:56:55,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375340376] [2021-12-16 23:56:55,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:56:55,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 23:56:55,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:56:55,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 23:56:55,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-16 23:56:55,332 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:56:55,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:56:55,535 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2021-12-16 23:56:55,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 23:56:55,536 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-16 23:56:55,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:56:55,536 INFO L225 Difference]: With dead ends: 96 [2021-12-16 23:56:55,536 INFO L226 Difference]: Without dead ends: 68 [2021-12-16 23:56:55,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-12-16 23:56:55,537 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 127 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 23:56:55,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 25 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 23:56:55,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-16 23:56:55,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2021-12-16 23:56:55,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 61 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:56:55,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2021-12-16 23:56:55,543 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 51 [2021-12-16 23:56:55,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:56:55,543 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2021-12-16 23:56:55,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:56:55,544 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2021-12-16 23:56:55,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-16 23:56:55,545 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:56:55,545 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:56:55,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-16 23:56:55,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:56:55,760 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:56:55,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:56:55,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1781065978, now seen corresponding path program 6 times [2021-12-16 23:56:55,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:56:55,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028681828] [2021-12-16 23:56:55,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:56:55,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:56:55,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:56:58,454 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:56:58,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:56:58,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028681828] [2021-12-16 23:56:58,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028681828] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:56:58,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832808790] [2021-12-16 23:56:58,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 23:56:58,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:56:58,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:56:58,458 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:56:58,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 23:56:58,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-16 23:56:58,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:56:58,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 85 conjunts are in the unsatisfiable core [2021-12-16 23:56:58,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:56:59,751 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 23:56:59,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:57:00,788 INFO L354 Elim1Store]: treesize reduction 114, result has 46.0 percent of original size [2021-12-16 23:57:00,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 108 [2021-12-16 23:57:01,013 INFO L354 Elim1Store]: treesize reduction 198, result has 6.2 percent of original size [2021-12-16 23:57:01,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 23 [2021-12-16 23:57:01,086 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 23:57:01,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832808790] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:57:01,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:57:01,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 17, 16] total 70 [2021-12-16 23:57:01,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629833306] [2021-12-16 23:57:01,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:57:01,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-16 23:57:01,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:57:01,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-16 23:57:01,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=4549, Unknown=0, NotChecked=0, Total=4830 [2021-12-16 23:57:01,090 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 70 states, 70 states have (on average 2.342857142857143) internal successors, (164), 70 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:04,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:57:04,562 INFO L93 Difference]: Finished difference Result 114 states and 125 transitions. [2021-12-16 23:57:04,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-16 23:57:04,562 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.342857142857143) internal successors, (164), 70 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-16 23:57:04,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:57:04,563 INFO L225 Difference]: With dead ends: 114 [2021-12-16 23:57:04,563 INFO L226 Difference]: Without dead ends: 110 [2021-12-16 23:57:04,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 84 SyntacticMatches, 20 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2676 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=661, Invalid=9239, Unknown=0, NotChecked=0, Total=9900 [2021-12-16 23:57:04,566 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 41 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2324 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 2540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 2324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-16 23:57:04,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 138 Invalid, 2540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 2324 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-16 23:57:04,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-16 23:57:04,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 99. [2021-12-16 23:57:04,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.1224489795918366) internal successors, (110), 98 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:04,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 110 transitions. [2021-12-16 23:57:04,576 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 110 transitions. Word has length 61 [2021-12-16 23:57:04,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:57:04,576 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 110 transitions. [2021-12-16 23:57:04,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.342857142857143) internal successors, (164), 70 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:04,577 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 110 transitions. [2021-12-16 23:57:04,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-16 23:57:04,578 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:57:04,578 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:57:04,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 23:57:04,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:57:04,802 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:57:04,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:57:04,803 INFO L85 PathProgramCache]: Analyzing trace with hash 2140781352, now seen corresponding path program 7 times [2021-12-16 23:57:04,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:57:04,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351752541] [2021-12-16 23:57:04,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:57:04,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:57:04,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:57:04,902 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-16 23:57:04,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:57:04,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351752541] [2021-12-16 23:57:04,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351752541] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:57:04,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816087757] [2021-12-16 23:57:04,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 23:57:04,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:57:04,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:57:04,905 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:57:04,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 23:57:04,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:57:04,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 23:57:04,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:57:05,112 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-16 23:57:05,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:57:05,226 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-16 23:57:05,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816087757] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:57:05,226 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:57:05,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-16 23:57:05,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562646681] [2021-12-16 23:57:05,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:57:05,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 23:57:05,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:57:05,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 23:57:05,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-16 23:57:05,228 INFO L87 Difference]: Start difference. First operand 99 states and 110 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:05,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:57:05,502 INFO L93 Difference]: Finished difference Result 221 states and 246 transitions. [2021-12-16 23:57:05,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 23:57:05,503 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-16 23:57:05,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:57:05,504 INFO L225 Difference]: With dead ends: 221 [2021-12-16 23:57:05,504 INFO L226 Difference]: Without dead ends: 126 [2021-12-16 23:57:05,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-12-16 23:57:05,505 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 124 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 23:57:05,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 45 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 23:57:05,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-16 23:57:05,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 106. [2021-12-16 23:57:05,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.1047619047619048) internal successors, (116), 105 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:05,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2021-12-16 23:57:05,513 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 63 [2021-12-16 23:57:05,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:57:05,513 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2021-12-16 23:57:05,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:05,514 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2021-12-16 23:57:05,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 23:57:05,515 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:57:05,515 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:57:05,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 23:57:05,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:57:05,731 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:57:05,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:57:05,732 INFO L85 PathProgramCache]: Analyzing trace with hash 156775434, now seen corresponding path program 8 times [2021-12-16 23:57:05,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:57:05,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849315944] [2021-12-16 23:57:05,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:57:05,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:57:05,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:57:05,809 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-16 23:57:05,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:57:05,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849315944] [2021-12-16 23:57:05,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849315944] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:57:05,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302152557] [2021-12-16 23:57:05,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 23:57:05,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:57:05,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:57:05,812 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:57:05,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 23:57:05,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 23:57:05,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:57:05,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 23:57:05,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:57:06,053 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-16 23:57:06,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:57:06,192 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-16 23:57:06,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302152557] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:57:06,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:57:06,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-16 23:57:06,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163890185] [2021-12-16 23:57:06,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:57:06,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 23:57:06,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:57:06,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 23:57:06,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-16 23:57:06,194 INFO L87 Difference]: Start difference. First operand 106 states and 116 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:06,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:57:06,483 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2021-12-16 23:57:06,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 23:57:06,484 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-16 23:57:06,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:57:06,484 INFO L225 Difference]: With dead ends: 118 [2021-12-16 23:57:06,485 INFO L226 Difference]: Without dead ends: 82 [2021-12-16 23:57:06,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-12-16 23:57:06,487 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 155 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 23:57:06,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 27 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 23:57:06,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-16 23:57:06,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2021-12-16 23:57:06,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0933333333333333) internal successors, (82), 75 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:06,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2021-12-16 23:57:06,498 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 65 [2021-12-16 23:57:06,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:57:06,498 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2021-12-16 23:57:06,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:06,498 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2021-12-16 23:57:06,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-16 23:57:06,505 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:57:06,505 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:57:06,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 23:57:06,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-16 23:57:06,729 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:57:06,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:57:06,729 INFO L85 PathProgramCache]: Analyzing trace with hash 958143540, now seen corresponding path program 9 times [2021-12-16 23:57:06,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:57:06,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579626044] [2021-12-16 23:57:06,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:57:06,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:57:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:57:10,917 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:57:10,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:57:10,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579626044] [2021-12-16 23:57:10,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579626044] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:57:10,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091430967] [2021-12-16 23:57:10,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 23:57:10,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:57:10,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:57:10,918 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:57:10,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 23:57:10,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-16 23:57:10,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:57:10,983 WARN L261 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 120 conjunts are in the unsatisfiable core [2021-12-16 23:57:10,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:57:11,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 23:57:15,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:57:15,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:57:15,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:57:15,851 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 23:57:15,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 51 [2021-12-16 23:57:16,219 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 5 proven. 103 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 23:57:16,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:57:22,942 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 23:57:22,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091430967] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:57:22,942 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:57:22,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 26, 21] total 103 [2021-12-16 23:57:22,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451958209] [2021-12-16 23:57:22,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:57:22,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-12-16 23:57:22,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:57:22,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-12-16 23:57:22,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=527, Invalid=9978, Unknown=1, NotChecked=0, Total=10506 [2021-12-16 23:57:22,947 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand has 103 states, 103 states have (on average 2.029126213592233) internal successors, (209), 103 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:32,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:57:32,127 INFO L93 Difference]: Finished difference Result 146 states and 159 transitions. [2021-12-16 23:57:32,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-12-16 23:57:32,128 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.029126213592233) internal successors, (209), 103 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-16 23:57:32,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:57:32,129 INFO L225 Difference]: With dead ends: 146 [2021-12-16 23:57:32,129 INFO L226 Difference]: Without dead ends: 142 [2021-12-16 23:57:32,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 93 SyntacticMatches, 23 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 8079 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=1745, Invalid=30116, Unknown=1, NotChecked=0, Total=31862 [2021-12-16 23:57:32,133 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 46 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 2559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 798 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-16 23:57:32,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 175 Invalid, 2559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 1469 Invalid, 0 Unknown, 798 Unchecked, 0.9s Time] [2021-12-16 23:57:32,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-12-16 23:57:32,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 111. [2021-12-16 23:57:32,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1) internal successors, (121), 110 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:32,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2021-12-16 23:57:32,142 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 75 [2021-12-16 23:57:32,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:57:32,143 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2021-12-16 23:57:32,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.029126213592233) internal successors, (209), 103 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:32,143 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2021-12-16 23:57:32,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-16 23:57:32,144 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:57:32,144 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:57:32,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 23:57:32,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:57:32,359 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:57:32,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:57:32,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1706175702, now seen corresponding path program 10 times [2021-12-16 23:57:32,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:57:32,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944331309] [2021-12-16 23:57:32,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:57:32,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:57:32,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:57:32,458 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-16 23:57:32,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:57:32,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944331309] [2021-12-16 23:57:32,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944331309] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:57:32,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892633289] [2021-12-16 23:57:32,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 23:57:32,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:57:32,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:57:32,460 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:57:32,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 23:57:32,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 23:57:32,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:57:32,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 23:57:32,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:57:32,699 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-16 23:57:32,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:57:32,829 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-16 23:57:32,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892633289] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:57:32,830 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:57:32,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-12-16 23:57:32,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70887960] [2021-12-16 23:57:32,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:57:32,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 23:57:32,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:57:32,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 23:57:32,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-12-16 23:57:32,831 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:33,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:57:33,114 INFO L93 Difference]: Finished difference Result 290 states and 318 transitions. [2021-12-16 23:57:33,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 23:57:33,114 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-16 23:57:33,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:57:33,115 INFO L225 Difference]: With dead ends: 290 [2021-12-16 23:57:33,115 INFO L226 Difference]: Without dead ends: 137 [2021-12-16 23:57:33,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-12-16 23:57:33,116 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 175 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 23:57:33,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 45 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 23:57:33,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-16 23:57:33,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 118. [2021-12-16 23:57:33,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.0854700854700854) internal successors, (127), 117 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:33,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 127 transitions. [2021-12-16 23:57:33,125 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 127 transitions. Word has length 77 [2021-12-16 23:57:33,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:57:33,125 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 127 transitions. [2021-12-16 23:57:33,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:33,126 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 127 transitions. [2021-12-16 23:57:33,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-16 23:57:33,126 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:57:33,126 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:57:33,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 23:57:33,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-16 23:57:33,335 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:57:33,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:57:33,336 INFO L85 PathProgramCache]: Analyzing trace with hash 437686490, now seen corresponding path program 11 times [2021-12-16 23:57:33,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:57:33,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511107000] [2021-12-16 23:57:33,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:57:33,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:57:33,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:57:33,453 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-16 23:57:33,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:57:33,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511107000] [2021-12-16 23:57:33,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511107000] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:57:33,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270648606] [2021-12-16 23:57:33,454 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 23:57:33,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:57:33,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:57:33,455 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:57:33,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 23:57:33,628 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-16 23:57:33,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:57:33,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 23:57:33,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:57:33,807 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-16 23:57:33,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:57:33,937 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-16 23:57:33,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270648606] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:57:33,937 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:57:33,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-12-16 23:57:33,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031357507] [2021-12-16 23:57:33,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:57:33,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 23:57:33,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:57:33,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 23:57:33,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-12-16 23:57:33,939 INFO L87 Difference]: Start difference. First operand 118 states and 127 transitions. Second operand has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:34,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:57:34,220 INFO L93 Difference]: Finished difference Result 130 states and 139 transitions. [2021-12-16 23:57:34,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-16 23:57:34,221 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-16 23:57:34,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:57:34,221 INFO L225 Difference]: With dead ends: 130 [2021-12-16 23:57:34,221 INFO L226 Difference]: Without dead ends: 96 [2021-12-16 23:57:34,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2021-12-16 23:57:34,222 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 175 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 23:57:34,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 28 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 23:57:34,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-16 23:57:34,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2021-12-16 23:57:34,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0786516853932584) internal successors, (96), 89 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:34,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2021-12-16 23:57:34,230 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 81 [2021-12-16 23:57:34,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:57:34,230 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2021-12-16 23:57:34,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:34,231 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2021-12-16 23:57:34,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-16 23:57:34,231 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:57:34,231 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:57:34,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 23:57:34,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-16 23:57:34,443 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:57:34,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:57:34,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1296238366, now seen corresponding path program 12 times [2021-12-16 23:57:34,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:57:34,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813333204] [2021-12-16 23:57:34,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:57:34,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:57:34,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:57:40,041 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 2 proven. 173 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:57:40,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:57:40,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813333204] [2021-12-16 23:57:40,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813333204] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:57:40,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546491214] [2021-12-16 23:57:40,042 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 23:57:40,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:57:40,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:57:40,043 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:57:40,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 23:57:40,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-16 23:57:40,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:57:40,122 WARN L261 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 146 conjunts are in the unsatisfiable core [2021-12-16 23:57:40,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:57:40,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 23:57:43,788 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 23:57:43,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 18 [2021-12-16 23:57:44,104 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 3 proven. 171 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 23:57:44,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:57:52,378 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 159 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-16 23:57:52,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546491214] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:57:52,378 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:57:52,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 32, 25] total 123 [2021-12-16 23:57:52,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938975040] [2021-12-16 23:57:52,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:57:52,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2021-12-16 23:57:52,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:57:52,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2021-12-16 23:57:52,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=754, Invalid=14252, Unknown=0, NotChecked=0, Total=15006 [2021-12-16 23:57:52,381 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand has 123 states, 123 states have (on average 2.032520325203252) internal successors, (250), 123 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:58:03,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:58:03,653 INFO L93 Difference]: Finished difference Result 268 states and 290 transitions. [2021-12-16 23:58:03,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-12-16 23:58:03,654 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.032520325203252) internal successors, (250), 123 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-12-16 23:58:03,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:58:03,655 INFO L225 Difference]: With dead ends: 268 [2021-12-16 23:58:03,655 INFO L226 Difference]: Without dead ends: 264 [2021-12-16 23:58:03,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 101 SyntacticMatches, 35 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16246 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=2350, Invalid=43660, Unknown=0, NotChecked=0, Total=46010 [2021-12-16 23:58:03,659 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 1736 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 3277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 1736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1326 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-16 23:58:03,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 180 Invalid, 3277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 1736 Invalid, 0 Unknown, 1326 Unchecked, 1.0s Time] [2021-12-16 23:58:03,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-12-16 23:58:03,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 157. [2021-12-16 23:58:03,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0897435897435896) internal successors, (170), 156 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:58:03,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 170 transitions. [2021-12-16 23:58:03,673 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 170 transitions. Word has length 89 [2021-12-16 23:58:03,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:58:03,674 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 170 transitions. [2021-12-16 23:58:03,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 2.032520325203252) internal successors, (250), 123 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:58:03,674 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 170 transitions. [2021-12-16 23:58:03,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-16 23:58:03,675 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:58:03,675 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:58:03,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-16 23:58:03,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-16 23:58:03,891 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:58:03,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:58:03,892 INFO L85 PathProgramCache]: Analyzing trace with hash -91318780, now seen corresponding path program 13 times [2021-12-16 23:58:03,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:58:03,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612634930] [2021-12-16 23:58:03,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:58:03,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:58:03,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:58:04,007 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-12-16 23:58:04,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:58:04,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612634930] [2021-12-16 23:58:04,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612634930] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:58:04,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439079845] [2021-12-16 23:58:04,008 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 23:58:04,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:58:04,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:58:04,012 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:58:04,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-16 23:58:04,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:58:04,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 23:58:04,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:58:04,351 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-12-16 23:58:04,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:58:04,496 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-12-16 23:58:04,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439079845] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:58:04,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:58:04,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2021-12-16 23:58:04,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428719503] [2021-12-16 23:58:04,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:58:04,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-16 23:58:04,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:58:04,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-16 23:58:04,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-12-16 23:58:04,498 INFO L87 Difference]: Start difference. First operand 157 states and 170 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:58:04,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:58:04,827 INFO L93 Difference]: Finished difference Result 350 states and 379 transitions. [2021-12-16 23:58:04,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-16 23:58:04,828 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-12-16 23:58:04,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:58:04,829 INFO L225 Difference]: With dead ends: 350 [2021-12-16 23:58:04,829 INFO L226 Difference]: Without dead ends: 170 [2021-12-16 23:58:04,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2021-12-16 23:58:04,830 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 264 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 23:58:04,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 43 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 23:58:04,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-12-16 23:58:04,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 150. [2021-12-16 23:58:04,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0738255033557047) internal successors, (160), 149 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:58:04,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 160 transitions. [2021-12-16 23:58:04,844 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 160 transitions. Word has length 91 [2021-12-16 23:58:04,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:58:04,844 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 160 transitions. [2021-12-16 23:58:04,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:58:04,845 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 160 transitions. [2021-12-16 23:58:04,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-16 23:58:04,845 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:58:04,846 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:58:04,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-16 23:58:05,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-16 23:58:05,051 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:58:05,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:58:05,052 INFO L85 PathProgramCache]: Analyzing trace with hash 688277478, now seen corresponding path program 14 times [2021-12-16 23:58:05,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:58:05,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469703214] [2021-12-16 23:58:05,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:58:05,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:58:05,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:58:05,178 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-16 23:58:05,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:58:05,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469703214] [2021-12-16 23:58:05,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469703214] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:58:05,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860232630] [2021-12-16 23:58:05,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 23:58:05,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:58:05,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:58:05,180 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:58:05,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-16 23:58:05,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 23:58:05,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:58:05,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 23:58:05,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:58:05,508 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-16 23:58:05,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:58:05,667 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-16 23:58:05,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860232630] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:58:05,667 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:58:05,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2021-12-16 23:58:05,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92515268] [2021-12-16 23:58:05,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:58:05,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-16 23:58:05,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:58:05,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-16 23:58:05,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-12-16 23:58:05,669 INFO L87 Difference]: Start difference. First operand 150 states and 160 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:58:06,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:58:06,002 INFO L93 Difference]: Finished difference Result 162 states and 172 transitions. [2021-12-16 23:58:06,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-16 23:58:06,002 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-12-16 23:58:06,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:58:06,005 INFO L225 Difference]: With dead ends: 162 [2021-12-16 23:58:06,006 INFO L226 Difference]: Without dead ends: 110 [2021-12-16 23:58:06,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 176 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=915, Unknown=0, NotChecked=0, Total=1190 [2021-12-16 23:58:06,006 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 209 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 23:58:06,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 24 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 23:58:06,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-16 23:58:06,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 104. [2021-12-16 23:58:06,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0679611650485437) internal successors, (110), 103 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:58:06,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 110 transitions. [2021-12-16 23:58:06,014 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 110 transitions. Word has length 93 [2021-12-16 23:58:06,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:58:06,014 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 110 transitions. [2021-12-16 23:58:06,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:58:06,014 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 110 transitions. [2021-12-16 23:58:06,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-16 23:58:06,015 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:58:06,015 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:58:06,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-16 23:58:06,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:58:06,231 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:58:06,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:58:06,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1101361904, now seen corresponding path program 15 times [2021-12-16 23:58:06,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:58:06,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655310164] [2021-12-16 23:58:06,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:58:06,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:58:06,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:58:13,804 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 2 proven. 250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:58:13,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:58:13,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655310164] [2021-12-16 23:58:13,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655310164] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:58:13,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619299364] [2021-12-16 23:58:13,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 23:58:13,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:58:13,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:58:13,806 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:58:13,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-16 23:58:13,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-16 23:58:13,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:58:13,907 WARN L261 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 174 conjunts are in the unsatisfiable core [2021-12-16 23:58:13,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:58:14,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 23:58:14,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 23:58:19,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:58:19,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:58:19,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:58:19,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:58:19,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:58:19,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:58:19,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:58:19,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:58:19,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:58:19,460 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 23:58:19,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 99 [2021-12-16 23:58:19,847 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 7 proven. 236 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 23:58:19,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:58:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 227 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-16 23:58:31,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619299364] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:58:31,931 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:58:31,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 35, 29] total 143 [2021-12-16 23:58:31,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766833470] [2021-12-16 23:58:31,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:58:31,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2021-12-16 23:58:31,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:58:31,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2021-12-16 23:58:31,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1002, Invalid=19304, Unknown=0, NotChecked=0, Total=20306 [2021-12-16 23:58:31,933 INFO L87 Difference]: Start difference. First operand 104 states and 110 transitions. Second operand has 143 states, 143 states have (on average 2.0) internal successors, (286), 143 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:58:49,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:58:49,805 INFO L93 Difference]: Finished difference Result 198 states and 211 transitions. [2021-12-16 23:58:49,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-12-16 23:58:49,805 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 2.0) internal successors, (286), 143 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-12-16 23:58:49,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:58:49,806 INFO L225 Difference]: With dead ends: 198 [2021-12-16 23:58:49,806 INFO L226 Difference]: Without dead ends: 194 [2021-12-16 23:58:49,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 122 SyntacticMatches, 41 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 17621 ImplicationChecksByTransitivity, 33.4s TimeCoverageRelationStatistics Valid=3015, Invalid=53867, Unknown=0, NotChecked=0, Total=56882 [2021-12-16 23:58:49,809 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 50 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 3151 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 4985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 3151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1464 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-16 23:58:49,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 202 Invalid, 4985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 3151 Invalid, 0 Unknown, 1464 Unchecked, 1.9s Time] [2021-12-16 23:58:49,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-12-16 23:58:49,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 151. [2021-12-16 23:58:49,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.0733333333333333) internal successors, (161), 150 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:58:49,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 161 transitions. [2021-12-16 23:58:49,820 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 161 transitions. Word has length 103 [2021-12-16 23:58:49,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:58:49,820 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 161 transitions. [2021-12-16 23:58:49,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 2.0) internal successors, (286), 143 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:58:49,820 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 161 transitions. [2021-12-16 23:58:49,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-16 23:58:49,821 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:58:49,821 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:58:49,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-16 23:58:50,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-16 23:58:50,021 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:58:50,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:58:50,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1793599822, now seen corresponding path program 16 times [2021-12-16 23:58:50,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:58:50,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798193538] [2021-12-16 23:58:50,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:58:50,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:58:50,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:58:50,193 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-16 23:58:50,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:58:50,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798193538] [2021-12-16 23:58:50,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798193538] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:58:50,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833400929] [2021-12-16 23:58:50,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 23:58:50,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:58:50,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:58:50,195 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:58:50,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-16 23:58:50,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 23:58:50,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:58:50,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 23:58:50,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:58:50,586 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-16 23:58:50,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:58:50,782 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-16 23:58:50,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833400929] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:58:50,782 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:58:50,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2021-12-16 23:58:50,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062873879] [2021-12-16 23:58:50,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:58:50,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-16 23:58:50,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:58:50,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-16 23:58:50,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2021-12-16 23:58:50,784 INFO L87 Difference]: Start difference. First operand 151 states and 161 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:58:51,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:58:51,176 INFO L93 Difference]: Finished difference Result 386 states and 414 transitions. [2021-12-16 23:58:51,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-16 23:58:51,176 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-12-16 23:58:51,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:58:51,177 INFO L225 Difference]: With dead ends: 386 [2021-12-16 23:58:51,177 INFO L226 Difference]: Without dead ends: 177 [2021-12-16 23:58:51,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 23:58:51,178 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 304 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 23:58:51,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 40 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 23:58:51,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-12-16 23:58:51,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 158. [2021-12-16 23:58:51,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.0636942675159236) internal successors, (167), 157 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:58:51,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 167 transitions. [2021-12-16 23:58:51,192 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 167 transitions. Word has length 105 [2021-12-16 23:58:51,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:58:51,192 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 167 transitions. [2021-12-16 23:58:51,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:58:51,193 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 167 transitions. [2021-12-16 23:58:51,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-16 23:58:51,193 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:58:51,193 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:58:51,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-16 23:58:51,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:58:51,415 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:58:51,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:58:51,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1629639498, now seen corresponding path program 17 times [2021-12-16 23:58:51,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:58:51,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708245520] [2021-12-16 23:58:51,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:58:51,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:58:51,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:58:51,575 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-12-16 23:58:51,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:58:51,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708245520] [2021-12-16 23:58:51,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708245520] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:58:51,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259873196] [2021-12-16 23:58:51,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 23:58:51,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:58:51,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:58:51,580 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:58:51,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-16 23:58:51,875 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-16 23:58:51,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:58:51,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 23:58:51,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:58:52,180 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-12-16 23:58:52,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:58:52,381 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-12-16 23:58:52,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259873196] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:58:52,382 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:58:52,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2021-12-16 23:58:52,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822398] [2021-12-16 23:58:52,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:58:52,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-16 23:58:52,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:58:52,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-16 23:58:52,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2021-12-16 23:58:52,383 INFO L87 Difference]: Start difference. First operand 158 states and 167 transitions. Second operand has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 26 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:58:52,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:58:52,826 INFO L93 Difference]: Finished difference Result 170 states and 179 transitions. [2021-12-16 23:58:52,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-16 23:58:52,826 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 26 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-12-16 23:58:52,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:58:52,827 INFO L225 Difference]: With dead ends: 170 [2021-12-16 23:58:52,827 INFO L226 Difference]: Without dead ends: 124 [2021-12-16 23:58:52,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 207 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=1207, Unknown=0, NotChecked=0, Total=1560 [2021-12-16 23:58:52,828 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 171 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 23:58:52,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 35 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 23:58:52,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-16 23:58:52,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 118. [2021-12-16 23:58:52,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.0598290598290598) internal successors, (124), 117 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:58:52,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 124 transitions. [2021-12-16 23:58:52,837 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 124 transitions. Word has length 109 [2021-12-16 23:58:52,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:58:52,837 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 124 transitions. [2021-12-16 23:58:52,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 26 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:58:52,837 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 124 transitions. [2021-12-16 23:58:52,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-16 23:58:52,838 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:58:52,838 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:58:52,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-16 23:58:53,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:58:53,039 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:58:53,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:58:53,039 INFO L85 PathProgramCache]: Analyzing trace with hash 680376510, now seen corresponding path program 18 times [2021-12-16 23:58:53,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:58:53,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113810631] [2021-12-16 23:58:53,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:58:53,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:58:53,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:59:03,710 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 20 proven. 323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:59:03,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:59:03,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113810631] [2021-12-16 23:59:03,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113810631] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:59:03,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295393604] [2021-12-16 23:59:03,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 23:59:03,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:59:03,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:59:03,712 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:59:03,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-16 23:59:03,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-16 23:59:03,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:59:03,826 WARN L261 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 198 conjunts are in the unsatisfiable core [2021-12-16 23:59:03,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:59:03,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 23:59:13,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:13,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:13,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:13,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:13,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:13,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:13,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:13,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:13,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:13,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:13,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:13,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:13,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:13,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:13,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:13,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:13,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:13,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:13,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:13,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:13,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:13,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:13,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:13,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:13,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:13,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:13,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:13,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:13,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:13,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:59:13,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 23:59:13,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 90 treesize of output 243 [2021-12-16 23:59:13,824 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 11 proven. 307 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-16 23:59:13,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:59:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-16 23:59:30,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295393604] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:59:30,886 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:59:30,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 38, 33] total 166 [2021-12-16 23:59:30,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841627181] [2021-12-16 23:59:30,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:59:30,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 166 states [2021-12-16 23:59:30,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:59:30,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2021-12-16 23:59:30,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=26113, Unknown=0, NotChecked=0, Total=27390 [2021-12-16 23:59:30,888 INFO L87 Difference]: Start difference. First operand 118 states and 124 transitions. Second operand has 166 states, 166 states have (on average 1.9457831325301205) internal successors, (323), 166 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:59:56,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:59:56,898 INFO L93 Difference]: Finished difference Result 224 states and 237 transitions. [2021-12-16 23:59:56,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-12-16 23:59:56,899 INFO L78 Accepts]: Start accepts. Automaton has has 166 states, 166 states have (on average 1.9457831325301205) internal successors, (323), 166 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-12-16 23:59:56,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:59:56,900 INFO L225 Difference]: With dead ends: 224 [2021-12-16 23:59:56,900 INFO L226 Difference]: Without dead ends: 220 [2021-12-16 23:59:56,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 141 SyntacticMatches, 41 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 23969 ImplicationChecksByTransitivity, 51.4s TimeCoverageRelationStatistics Valid=3968, Invalid=71932, Unknown=0, NotChecked=0, Total=75900 [2021-12-16 23:59:56,903 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 76 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 4119 mSolverCounterSat, 501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 6588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 501 IncrementalHoareTripleChecker+Valid, 4119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1968 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-16 23:59:56,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 256 Invalid, 6588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [501 Valid, 4119 Invalid, 0 Unknown, 1968 Unchecked, 2.6s Time] [2021-12-16 23:59:56,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-12-16 23:59:56,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 171. [2021-12-16 23:59:56,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.0647058823529412) internal successors, (181), 170 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:59:56,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 181 transitions. [2021-12-16 23:59:56,920 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 181 transitions. Word has length 117 [2021-12-16 23:59:56,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:59:56,921 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 181 transitions. [2021-12-16 23:59:56,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 166 states, 166 states have (on average 1.9457831325301205) internal successors, (323), 166 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:59:56,921 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 181 transitions. [2021-12-16 23:59:56,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-16 23:59:56,921 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:59:56,921 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:59:56,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-16 23:59:57,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:59:57,122 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:59:57,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:59:57,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1060032224, now seen corresponding path program 19 times [2021-12-16 23:59:57,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:59:57,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929168299] [2021-12-16 23:59:57,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:59:57,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:59:57,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:59:57,298 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-16 23:59:57,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:59:57,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929168299] [2021-12-16 23:59:57,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929168299] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:59:57,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753049684] [2021-12-16 23:59:57,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 23:59:57,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:59:57,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:59:57,300 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:59:57,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-16 23:59:57,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:59:57,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-16 23:59:57,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:59:57,716 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-16 23:59:57,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:59:57,896 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-16 23:59:57,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753049684] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:59:57,897 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:59:57,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2021-12-16 23:59:57,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461862535] [2021-12-16 23:59:57,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:59:57,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-16 23:59:57,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:59:57,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-16 23:59:57,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2021-12-16 23:59:57,898 INFO L87 Difference]: Start difference. First operand 171 states and 181 transitions. Second operand has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:59:58,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:59:58,334 INFO L93 Difference]: Finished difference Result 434 states and 462 transitions. [2021-12-16 23:59:58,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-16 23:59:58,334 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-12-16 23:59:58,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:59:58,336 INFO L225 Difference]: With dead ends: 434 [2021-12-16 23:59:58,336 INFO L226 Difference]: Without dead ends: 197 [2021-12-16 23:59:58,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2021-12-16 23:59:58,337 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 373 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 23:59:58,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 45 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 23:59:58,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-16 23:59:58,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 178. [2021-12-16 23:59:58,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.0564971751412429) internal successors, (187), 177 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:59:58,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 187 transitions. [2021-12-16 23:59:58,357 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 187 transitions. Word has length 119 [2021-12-16 23:59:58,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:59:58,357 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 187 transitions. [2021-12-16 23:59:58,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:59:58,357 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 187 transitions. [2021-12-16 23:59:58,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-16 23:59:58,358 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:59:58,358 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:59:58,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-16 23:59:58,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:59:58,583 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:59:58,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:59:58,584 INFO L85 PathProgramCache]: Analyzing trace with hash 365018596, now seen corresponding path program 20 times [2021-12-16 23:59:58,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:59:58,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765066864] [2021-12-16 23:59:58,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:59:58,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:59:58,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:59:58,761 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-12-16 23:59:58,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:59:58,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765066864] [2021-12-16 23:59:58,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765066864] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:59:58,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576101073] [2021-12-16 23:59:58,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 23:59:58,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:59:58,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:59:58,763 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:59:58,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-16 23:59:58,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 23:59:58,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:59:58,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-16 23:59:58,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:59:59,134 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-12-16 23:59:59,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:59:59,332 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-12-16 23:59:59,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576101073] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:59:59,333 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:59:59,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2021-12-16 23:59:59,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275454462] [2021-12-16 23:59:59,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:59:59,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-16 23:59:59,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:59:59,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-16 23:59:59,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2021-12-16 23:59:59,334 INFO L87 Difference]: Start difference. First operand 178 states and 187 transitions. Second operand has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:59:59,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:59:59,833 INFO L93 Difference]: Finished difference Result 190 states and 199 transitions. [2021-12-16 23:59:59,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-16 23:59:59,833 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-12-16 23:59:59,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:59:59,834 INFO L225 Difference]: With dead ends: 190 [2021-12-16 23:59:59,834 INFO L226 Difference]: Without dead ends: 138 [2021-12-16 23:59:59,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 234 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=441, Invalid=1539, Unknown=0, NotChecked=0, Total=1980 [2021-12-16 23:59:59,835 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 323 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 23:59:59,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 35 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 23:59:59,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-16 23:59:59,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 132. [2021-12-16 23:59:59,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.0534351145038168) internal successors, (138), 131 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:59:59,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 138 transitions. [2021-12-16 23:59:59,849 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 138 transitions. Word has length 123 [2021-12-16 23:59:59,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:59:59,850 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 138 transitions. [2021-12-16 23:59:59,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:59:59,850 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 138 transitions. [2021-12-16 23:59:59,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-16 23:59:59,851 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:59:59,851 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:59:59,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-17 00:00:00,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-17 00:00:00,060 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:00:00,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:00:00,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1125688340, now seen corresponding path program 21 times [2021-12-17 00:00:00,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:00:00,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043899880] [2021-12-17 00:00:00,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:00:00,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:00:00,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:00:15,230 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 31 proven. 417 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:00:15,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:00:15,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043899880] [2021-12-17 00:00:15,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043899880] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:00:15,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061442920] [2021-12-17 00:00:15,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 00:00:15,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:00:15,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:00:15,233 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:00:15,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-17 00:00:15,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-17 00:00:15,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:00:15,381 WARN L261 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 228 conjunts are in the unsatisfiable core [2021-12-17 00:00:15,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:00:15,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:00:15,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:00:15,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:00:30,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:00:30,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:00:30,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:00:30,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:00:30,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:00:30,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:00:30,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:00:30,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:00:30,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:00:30,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:00:30,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:00:30,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:00:30,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:00:30,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:00:30,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:00:30,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:00:30,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:00:30,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:00:30,187 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 00:00:30,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 72 treesize of output 163 [2021-12-17 00:00:30,818 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 9 proven. 423 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 00:00:30,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:00:56,223 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 399 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-17 00:00:56,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061442920] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:00:56,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:00:56,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 44, 37] total 189 [2021-12-17 00:00:56,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102458128] [2021-12-17 00:00:56,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:00:56,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 189 states [2021-12-17 00:00:56,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:00:56,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 189 interpolants. [2021-12-17 00:00:56,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1462, Invalid=34070, Unknown=0, NotChecked=0, Total=35532 [2021-12-17 00:00:56,226 INFO L87 Difference]: Start difference. First operand 132 states and 138 transitions. Second operand has 189 states, 189 states have (on average 1.9259259259259258) internal successors, (364), 189 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:01:32,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:01:32,324 INFO L93 Difference]: Finished difference Result 250 states and 263 transitions. [2021-12-17 00:01:32,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-12-17 00:01:32,327 INFO L78 Accepts]: Start accepts. Automaton has has 189 states, 189 states have (on average 1.9259259259259258) internal successors, (364), 189 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-12-17 00:01:32,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:01:32,329 INFO L225 Difference]: With dead ends: 250 [2021-12-17 00:01:32,329 INFO L226 Difference]: Without dead ends: 246 [2021-12-17 00:01:32,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 151 SyntacticMatches, 50 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 32250 ImplicationChecksByTransitivity, 74.5s TimeCoverageRelationStatistics Valid=4735, Invalid=93547, Unknown=0, NotChecked=0, Total=98282 [2021-12-17 00:01:32,336 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 70 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 4509 mSolverCounterSat, 673 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 8615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 673 IncrementalHoareTripleChecker+Valid, 4509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3433 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:01:32,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 242 Invalid, 8615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [673 Valid, 4509 Invalid, 0 Unknown, 3433 Unchecked, 3.1s Time] [2021-12-17 00:01:32,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-12-17 00:01:32,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 191. [2021-12-17 00:01:32,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.0578947368421052) internal successors, (201), 190 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:01:32,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 201 transitions. [2021-12-17 00:01:32,359 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 201 transitions. Word has length 131 [2021-12-17 00:01:32,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:01:32,360 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 201 transitions. [2021-12-17 00:01:32,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 189 states, 189 states have (on average 1.9259259259259258) internal successors, (364), 189 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:01:32,360 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 201 transitions. [2021-12-17 00:01:32,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-17 00:01:32,361 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:01:32,362 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:01:32,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-17 00:01:32,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-17 00:01:32,579 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:01:32,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:01:32,580 INFO L85 PathProgramCache]: Analyzing trace with hash 598498958, now seen corresponding path program 22 times [2021-12-17 00:01:32,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:01:32,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881895943] [2021-12-17 00:01:32,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:01:32,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:01:32,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:01:32,782 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 66 proven. 79 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2021-12-17 00:01:32,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:01:32,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881895943] [2021-12-17 00:01:32,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881895943] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:01:32,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927291757] [2021-12-17 00:01:32,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 00:01:32,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:01:32,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:01:32,785 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:01:32,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-17 00:01:32,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 00:01:32,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:01:32,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-17 00:01:32,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:01:33,234 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2021-12-17 00:01:33,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:01:33,440 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2021-12-17 00:01:33,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927291757] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:01:33,441 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:01:33,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2021-12-17 00:01:33,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864517072] [2021-12-17 00:01:33,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:01:33,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-17 00:01:33,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:01:33,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-17 00:01:33,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2021-12-17 00:01:33,442 INFO L87 Difference]: Start difference. First operand 191 states and 201 transitions. Second operand has 32 states, 32 states have (on average 2.71875) internal successors, (87), 32 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:01:34,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:01:34,032 INFO L93 Difference]: Finished difference Result 482 states and 510 transitions. [2021-12-17 00:01:34,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-17 00:01:34,032 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.71875) internal successors, (87), 32 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-12-17 00:01:34,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:01:34,033 INFO L225 Difference]: With dead ends: 482 [2021-12-17 00:01:34,033 INFO L226 Difference]: Without dead ends: 217 [2021-12-17 00:01:34,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=407, Invalid=1233, Unknown=0, NotChecked=0, Total=1640 [2021-12-17 00:01:34,034 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 416 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 00:01:34,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 45 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 00:01:34,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-12-17 00:01:34,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 198. [2021-12-17 00:01:34,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.0507614213197969) internal successors, (207), 197 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:01:34,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 207 transitions. [2021-12-17 00:01:34,059 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 207 transitions. Word has length 133 [2021-12-17 00:01:34,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:01:34,059 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 207 transitions. [2021-12-17 00:01:34,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.71875) internal successors, (87), 32 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:01:34,060 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 207 transitions. [2021-12-17 00:01:34,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-17 00:01:34,061 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:01:34,061 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:01:34,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-17 00:01:34,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:01:34,271 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:01:34,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:01:34,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1523276142, now seen corresponding path program 23 times [2021-12-17 00:01:34,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:01:34,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583763308] [2021-12-17 00:01:34,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:01:34,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:01:34,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:01:34,466 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2021-12-17 00:01:34,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:01:34,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583763308] [2021-12-17 00:01:34,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583763308] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:01:34,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98028342] [2021-12-17 00:01:34,467 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 00:01:34,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:01:34,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:01:34,468 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:01:34,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-17 00:01:34,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-17 00:01:34,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:01:34,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-17 00:01:34,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:01:35,103 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2021-12-17 00:01:35,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:01:35,351 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2021-12-17 00:01:35,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98028342] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:01:35,351 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:01:35,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2021-12-17 00:01:35,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709010315] [2021-12-17 00:01:35,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:01:35,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-17 00:01:35,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:01:35,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-17 00:01:35,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2021-12-17 00:01:35,354 INFO L87 Difference]: Start difference. First operand 198 states and 207 transitions. Second operand has 32 states, 32 states have (on average 3.3125) internal successors, (106), 32 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:01:35,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:01:35,970 INFO L93 Difference]: Finished difference Result 210 states and 219 transitions. [2021-12-17 00:01:35,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-17 00:01:35,970 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.3125) internal successors, (106), 32 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-12-17 00:01:35,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:01:35,971 INFO L225 Difference]: With dead ends: 210 [2021-12-17 00:01:35,971 INFO L226 Difference]: Without dead ends: 152 [2021-12-17 00:01:35,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 261 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=539, Invalid=1911, Unknown=0, NotChecked=0, Total=2450 [2021-12-17 00:01:35,972 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 433 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 1303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 00:01:35,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 31 Invalid, 1303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 00:01:35,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-12-17 00:01:35,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 146. [2021-12-17 00:01:35,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.0482758620689656) internal successors, (152), 145 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:01:35,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 152 transitions. [2021-12-17 00:01:35,988 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 152 transitions. Word has length 137 [2021-12-17 00:01:35,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:01:35,988 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 152 transitions. [2021-12-17 00:01:35,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.3125) internal successors, (106), 32 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:01:35,988 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 152 transitions. [2021-12-17 00:01:35,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-17 00:01:35,989 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:01:35,989 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:01:36,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-17 00:01:36,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:01:36,189 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:01:36,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:01:36,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1276094822, now seen corresponding path program 24 times [2021-12-17 00:01:36,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:01:36,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13599944] [2021-12-17 00:01:36,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:01:36,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:01:36,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:01:54,695 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 30 proven. 537 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:01:54,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:01:54,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13599944] [2021-12-17 00:01:54,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13599944] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:01:54,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169210821] [2021-12-17 00:01:54,696 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 00:01:54,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:01:54,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:01:54,697 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:01:54,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-17 00:01:54,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-12-17 00:01:54,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:01:54,922 WARN L261 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 250 conjunts are in the unsatisfiable core [2021-12-17 00:01:54,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:01:55,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:02:06,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:02:06,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:02:06,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:02:06,106 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 00:02:06,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 51 [2021-12-17 00:02:06,634 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 5 proven. 558 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 00:02:06,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:02:42,222 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 0 proven. 503 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-17 00:02:42,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169210821] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:02:42,223 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:02:42,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 51, 41] total 214 [2021-12-17 00:02:42,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676064196] [2021-12-17 00:02:42,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:02:42,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 214 states [2021-12-17 00:02:42,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:02:42,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 214 interpolants. [2021-12-17 00:02:42,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2281, Invalid=43301, Unknown=0, NotChecked=0, Total=45582 [2021-12-17 00:02:42,226 INFO L87 Difference]: Start difference. First operand 146 states and 152 transitions. Second operand has 214 states, 214 states have (on average 1.9065420560747663) internal successors, (408), 214 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:03:30,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:03:30,343 INFO L93 Difference]: Finished difference Result 300 states and 316 transitions. [2021-12-17 00:03:30,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2021-12-17 00:03:30,343 INFO L78 Accepts]: Start accepts. Automaton has has 214 states, 214 states have (on average 1.9065420560747663) internal successors, (408), 214 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-12-17 00:03:30,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:03:30,344 INFO L225 Difference]: With dead ends: 300 [2021-12-17 00:03:30,344 INFO L226 Difference]: Without dead ends: 296 [2021-12-17 00:03:30,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 158 SyntacticMatches, 65 SemanticMatches, 376 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 60367 ImplicationChecksByTransitivity, 90.7s TimeCoverageRelationStatistics Valid=7502, Invalid=135004, Unknown=0, NotChecked=0, Total=142506 [2021-12-17 00:03:30,353 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 105 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 5081 mSolverCounterSat, 1006 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 10836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1006 IncrementalHoareTripleChecker+Valid, 5081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4749 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:03:30,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 230 Invalid, 10836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1006 Valid, 5081 Invalid, 0 Unknown, 4749 Unchecked, 4.0s Time] [2021-12-17 00:03:30,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-12-17 00:03:30,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 211. [2021-12-17 00:03:30,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.0523809523809524) internal successors, (221), 210 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:03:30,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 221 transitions. [2021-12-17 00:03:30,384 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 221 transitions. Word has length 145 [2021-12-17 00:03:30,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:03:30,384 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 221 transitions. [2021-12-17 00:03:30,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 214 states, 214 states have (on average 1.9065420560747663) internal successors, (408), 214 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:03:30,385 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 221 transitions. [2021-12-17 00:03:30,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-17 00:03:30,386 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:03:30,386 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:03:30,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-17 00:03:30,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-17 00:03:30,599 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:03:30,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:03:30,600 INFO L85 PathProgramCache]: Analyzing trace with hash 2086757820, now seen corresponding path program 25 times [2021-12-17 00:03:30,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:03:30,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937735893] [2021-12-17 00:03:30,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:03:30,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:03:30,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:03:30,837 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 83 proven. 98 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2021-12-17 00:03:30,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:03:30,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937735893] [2021-12-17 00:03:30,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937735893] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:03:30,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100090616] [2021-12-17 00:03:30,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 00:03:30,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:03:30,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:03:30,839 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:03:30,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-17 00:03:30,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:03:30,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-17 00:03:30,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:03:31,399 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2021-12-17 00:03:31,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:03:31,671 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2021-12-17 00:03:31,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100090616] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:03:31,671 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:03:31,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2021-12-17 00:03:31,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083879634] [2021-12-17 00:03:31,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:03:31,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-17 00:03:31,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:03:31,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-17 00:03:31,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2021-12-17 00:03:31,673 INFO L87 Difference]: Start difference. First operand 211 states and 221 transitions. Second operand has 35 states, 35 states have (on average 2.657142857142857) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:03:32,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:03:32,301 INFO L93 Difference]: Finished difference Result 530 states and 558 transitions. [2021-12-17 00:03:32,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-17 00:03:32,301 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.657142857142857) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2021-12-17 00:03:32,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:03:32,303 INFO L225 Difference]: With dead ends: 530 [2021-12-17 00:03:32,303 INFO L226 Difference]: Without dead ends: 237 [2021-12-17 00:03:32,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=486, Invalid=1494, Unknown=0, NotChecked=0, Total=1980 [2021-12-17 00:03:32,304 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 507 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 532 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 00:03:32,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [507 Valid, 49 Invalid, 1421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [532 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 00:03:32,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-12-17 00:03:32,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 218. [2021-12-17 00:03:32,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.0460829493087558) internal successors, (227), 217 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:03:32,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 227 transitions. [2021-12-17 00:03:32,336 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 227 transitions. Word has length 147 [2021-12-17 00:03:32,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:03:32,336 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 227 transitions. [2021-12-17 00:03:32,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.657142857142857) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:03:32,336 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 227 transitions. [2021-12-17 00:03:32,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-17 00:03:32,337 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:03:32,337 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:03:32,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-17 00:03:32,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-17 00:03:32,555 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:03:32,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:03:32,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1852356928, now seen corresponding path program 26 times [2021-12-17 00:03:32,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:03:32,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136313496] [2021-12-17 00:03:32,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:03:32,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:03:32,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:03:32,792 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 64 proven. 117 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2021-12-17 00:03:32,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:03:32,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136313496] [2021-12-17 00:03:32,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136313496] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:03:32,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011750070] [2021-12-17 00:03:32,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:03:32,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:03:32,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:03:32,796 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:03:32,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-17 00:03:32,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:03:32,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:03:32,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-17 00:03:32,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:03:33,348 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2021-12-17 00:03:33,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:03:33,576 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2021-12-17 00:03:33,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011750070] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:03:33,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 00:03:33,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2021-12-17 00:03:33,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527608326] [2021-12-17 00:03:33,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 00:03:33,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-17 00:03:33,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:03:33,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-17 00:03:33,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2021-12-17 00:03:33,578 INFO L87 Difference]: Start difference. First operand 218 states and 227 transitions. Second operand has 35 states, 35 states have (on average 2.657142857142857) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:03:34,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:03:34,382 INFO L93 Difference]: Finished difference Result 230 states and 239 transitions. [2021-12-17 00:03:34,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 00:03:34,382 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.657142857142857) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-12-17 00:03:34,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:03:34,383 INFO L225 Difference]: With dead ends: 230 [2021-12-17 00:03:34,383 INFO L226 Difference]: Without dead ends: 166 [2021-12-17 00:03:34,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 288 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=647, Invalid=2323, Unknown=0, NotChecked=0, Total=2970 [2021-12-17 00:03:34,384 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 343 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1327 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 1327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 00:03:34,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 43 Invalid, 1663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 1327 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 00:03:34,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-12-17 00:03:34,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2021-12-17 00:03:34,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.0440251572327044) internal successors, (166), 159 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:03:34,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 166 transitions. [2021-12-17 00:03:34,403 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 166 transitions. Word has length 151 [2021-12-17 00:03:34,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:03:34,404 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 166 transitions. [2021-12-17 00:03:34,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.657142857142857) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:03:34,404 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 166 transitions. [2021-12-17 00:03:34,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-17 00:03:34,404 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:03:34,404 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:03:34,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-17 00:03:34,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-17 00:03:34,605 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:03:34,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:03:34,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1591113528, now seen corresponding path program 27 times [2021-12-17 00:03:34,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:03:34,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710474132] [2021-12-17 00:03:34,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:03:34,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:03:34,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:04:00,620 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 65 proven. 635 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:04:00,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:04:00,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710474132] [2021-12-17 00:04:00,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710474132] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:04:00,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786948555] [2021-12-17 00:04:00,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 00:04:00,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:04:00,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:04:00,628 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:04:00,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-17 00:04:00,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-17 00:04:00,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:04:00,891 WARN L261 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 296 conjunts are in the unsatisfiable core [2021-12-17 00:04:00,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:04:00,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:04:01,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:04:01,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:04:01,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:04:01,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:04:01,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:04:01,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:04:01,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:04:01,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 00:04:40,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:04:40,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:04:40,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:04:40,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:04:40,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:04:40,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:04:40,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:04:40,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:04:40,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:04:40,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:04:40,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:04:40,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:04:40,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:04:40,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:04:40,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:04:40,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:04:40,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:04:40,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:04:40,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:04:40,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:04:40,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:04:40,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:04:40,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:04:40,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:04:40,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:04:40,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:04:40,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:04:40,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:04:40,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:04:40,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:04:40,757 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 00:04:40,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 90 treesize of output 243 [2021-12-17 00:04:41,785 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 10 proven. 670 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-17 00:04:41,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:05:27,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-12-17 00:05:27,697 WARN L228 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-12-17 00:05:27,698 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-12-17 00:05:27,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 00:05:27,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [145] total 145 [2021-12-17 00:05:27,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413435212] [2021-12-17 00:05:27,699 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 00:05:27,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2021-12-17 00:05:27,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:05:27,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2021-12-17 00:05:27,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4000, Invalid=74119, Unknown=1, NotChecked=0, Total=78120 [2021-12-17 00:05:27,704 INFO L87 Difference]: Start difference. First operand 160 states and 166 transitions. Second operand has 145 states, 145 states have (on average 1.096551724137931) internal successors, (159), 145 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:05:27,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 00:05:27,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 79 SyntacticMatches, 35 SemanticMatches, 278 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36843 ImplicationChecksByTransitivity, 92.7s TimeCoverageRelationStatistics Valid=4000, Invalid=74119, Unknown=1, NotChecked=0, Total=78120 [2021-12-17 00:05:27,715 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:05:27,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:05:27,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-17 00:05:27,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:05:27,936 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@5327ca0f at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-17 00:05:27,940 INFO L158 Benchmark]: Toolchain (without parser) took 529217.21ms. Allocated memory was 117.4MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 92.8MB in the beginning and 651.6MB in the end (delta: -558.8MB). Peak memory consumption was 573.6MB. Max. memory is 16.1GB. [2021-12-17 00:05:27,940 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 117.4MB. Free memory is still 75.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 00:05:27,940 INFO L158 Benchmark]: CACSL2BoogieTranslator took 237.02ms. Allocated memory is still 117.4MB. Free memory was 92.4MB in the beginning and 92.4MB in the end (delta: -12.8kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 00:05:27,941 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.58ms. Allocated memory is still 117.4MB. Free memory was 92.4MB in the beginning and 90.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 00:05:27,941 INFO L158 Benchmark]: Boogie Preprocessor took 47.95ms. Allocated memory is still 117.4MB. Free memory was 90.7MB in the beginning and 89.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 00:05:27,941 INFO L158 Benchmark]: RCFGBuilder took 364.42ms. Allocated memory is still 117.4MB. Free memory was 89.5MB in the beginning and 77.9MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-17 00:05:27,941 INFO L158 Benchmark]: TraceAbstraction took 528524.89ms. Allocated memory was 117.4MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 77.3MB in the beginning and 651.6MB in the end (delta: -574.3MB). Peak memory consumption was 558.5MB. Max. memory is 16.1GB. [2021-12-17 00:05:27,942 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 117.4MB. Free memory is still 75.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 237.02ms. Allocated memory is still 117.4MB. Free memory was 92.4MB in the beginning and 92.4MB in the end (delta: -12.8kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.58ms. Allocated memory is still 117.4MB. Free memory was 92.4MB in the beginning and 90.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 47.95ms. Allocated memory is still 117.4MB. Free memory was 90.7MB in the beginning and 89.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 364.42ms. Allocated memory is still 117.4MB. Free memory was 89.5MB in the beginning and 77.9MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 528524.89ms. Allocated memory was 117.4MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 77.3MB in the beginning and 651.6MB in the end (delta: -574.3MB). Peak memory consumption was 558.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@5327ca0f de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@5327ca0f: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-crafted/zero_sum_const3.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 4a8466707e2bff30c44c48996d40a42275ef25007ed8ba21de1de20ade9b7ba9 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 00:05:29,762 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 00:05:29,765 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 00:05:29,809 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 00:05:29,809 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 00:05:29,813 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 00:05:29,814 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 00:05:29,820 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 00:05:29,823 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 00:05:29,828 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 00:05:29,830 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 00:05:29,844 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 00:05:29,844 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 00:05:29,846 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 00:05:29,847 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 00:05:29,848 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 00:05:29,852 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 00:05:29,853 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 00:05:29,854 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 00:05:29,857 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 00:05:29,860 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 00:05:29,862 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 00:05:29,863 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 00:05:29,865 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 00:05:29,870 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 00:05:29,872 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 00:05:29,872 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 00:05:29,874 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 00:05:29,874 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 00:05:29,875 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 00:05:29,875 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 00:05:29,876 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 00:05:29,878 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 00:05:29,878 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 00:05:29,880 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 00:05:29,880 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 00:05:29,881 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 00:05:29,881 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 00:05:29,881 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 00:05:29,883 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 00:05:29,883 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 00:05:29,884 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-17 00:05:29,922 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 00:05:29,922 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 00:05:29,923 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 00:05:29,923 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 00:05:29,924 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 00:05:29,924 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 00:05:29,926 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 00:05:29,926 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 00:05:29,926 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 00:05:29,926 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 00:05:29,927 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 00:05:29,927 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 00:05:29,927 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 00:05:29,928 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 00:05:29,928 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 00:05:29,928 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 00:05:29,928 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-17 00:05:29,928 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-17 00:05:29,929 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-17 00:05:29,929 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 00:05:29,929 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 00:05:29,929 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 00:05:29,929 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 00:05:29,930 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 00:05:29,930 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 00:05:29,930 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 00:05:29,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 00:05:29,930 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 00:05:29,931 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 00:05:29,931 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 00:05:29,931 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-17 00:05:29,931 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-17 00:05:29,932 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 00:05:29,932 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 00:05:29,932 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 00:05:29,932 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 00:05:29,932 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-17 00:05:29,933 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4a8466707e2bff30c44c48996d40a42275ef25007ed8ba21de1de20ade9b7ba9 [2021-12-17 00:05:30,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 00:05:30,280 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 00:05:30,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 00:05:30,284 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 00:05:30,285 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 00:05:30,286 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_const3.c [2021-12-17 00:05:30,354 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4cbd07fd/122527d9fa474ba98a3122f5ac5972ce/FLAGed49d5d26 [2021-12-17 00:05:30,774 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 00:05:30,775 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const3.c [2021-12-17 00:05:30,781 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4cbd07fd/122527d9fa474ba98a3122f5ac5972ce/FLAGed49d5d26 [2021-12-17 00:05:30,794 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4cbd07fd/122527d9fa474ba98a3122f5ac5972ce [2021-12-17 00:05:30,796 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 00:05:30,798 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 00:05:30,799 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 00:05:30,799 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 00:05:30,802 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 00:05:30,802 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:05:30" (1/1) ... [2021-12-17 00:05:30,805 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bc770fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:05:30, skipping insertion in model container [2021-12-17 00:05:30,805 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:05:30" (1/1) ... [2021-12-17 00:05:30,811 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 00:05:30,829 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 00:05:30,929 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const3.c[406,419] [2021-12-17 00:05:30,982 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 00:05:31,009 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 00:05:31,023 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const3.c[406,419] [2021-12-17 00:05:31,053 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 00:05:31,065 INFO L208 MainTranslator]: Completed translation [2021-12-17 00:05:31,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:05:31 WrapperNode [2021-12-17 00:05:31,066 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 00:05:31,075 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 00:05:31,076 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 00:05:31,076 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 00:05:31,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:05:31" (1/1) ... [2021-12-17 00:05:31,097 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:05:31" (1/1) ... [2021-12-17 00:05:31,122 INFO L137 Inliner]: procedures = 18, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 103 [2021-12-17 00:05:31,122 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 00:05:31,123 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 00:05:31,123 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 00:05:31,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 00:05:31,131 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:05:31" (1/1) ... [2021-12-17 00:05:31,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:05:31" (1/1) ... [2021-12-17 00:05:31,137 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:05:31" (1/1) ... [2021-12-17 00:05:31,137 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:05:31" (1/1) ... [2021-12-17 00:05:31,154 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:05:31" (1/1) ... [2021-12-17 00:05:31,161 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:05:31" (1/1) ... [2021-12-17 00:05:31,167 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:05:31" (1/1) ... [2021-12-17 00:05:31,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 00:05:31,172 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 00:05:31,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 00:05:31,174 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 00:05:31,175 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:05:31" (1/1) ... [2021-12-17 00:05:31,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 00:05:31,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:05:31,210 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 00:05:31,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 00:05:31,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 00:05:31,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-17 00:05:31,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-17 00:05:31,251 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-17 00:05:31,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 00:05:31,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 00:05:31,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-17 00:05:31,339 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 00:05:31,340 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 00:05:31,566 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 00:05:31,571 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 00:05:31,571 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-12-17 00:05:31,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:05:31 BoogieIcfgContainer [2021-12-17 00:05:31,573 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 00:05:31,588 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 00:05:31,589 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 00:05:31,591 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 00:05:31,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 12:05:30" (1/3) ... [2021-12-17 00:05:31,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cc85aae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:05:31, skipping insertion in model container [2021-12-17 00:05:31,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:05:31" (2/3) ... [2021-12-17 00:05:31,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cc85aae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:05:31, skipping insertion in model container [2021-12-17 00:05:31,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:05:31" (3/3) ... [2021-12-17 00:05:31,594 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const3.c [2021-12-17 00:05:31,599 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 00:05:31,599 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 00:05:31,672 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 00:05:31,682 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=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, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 00:05:31,682 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 00:05:31,705 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:05:31,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-17 00:05:31,711 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:05:31,711 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:05:31,712 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:05:31,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:05:31,717 INFO L85 PathProgramCache]: Analyzing trace with hash 534528496, now seen corresponding path program 1 times [2021-12-17 00:05:31,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:05:31,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1709321161] [2021-12-17 00:05:31,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:05:31,731 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:05:31,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:05:31,733 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:05:31,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-17 00:05:31,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:05:31,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-17 00:05:31,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:05:31,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:05:31,897 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:05:31,898 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:05:31,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1709321161] [2021-12-17 00:05:31,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1709321161] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:05:31,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:05:31,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 00:05:31,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928078071] [2021-12-17 00:05:31,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:05:31,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 00:05:31,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:05:31,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 00:05:31,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 00:05:31,931 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:05:31,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:05:31,945 INFO L93 Difference]: Finished difference Result 59 states and 86 transitions. [2021-12-17 00:05:31,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 00:05:31,948 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-17 00:05:31,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:05:31,955 INFO L225 Difference]: With dead ends: 59 [2021-12-17 00:05:31,955 INFO L226 Difference]: Without dead ends: 27 [2021-12-17 00:05:31,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 00:05:31,960 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:05:31,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:05:31,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-17 00:05:31,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-17 00:05:31,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:05:31,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-12-17 00:05:31,988 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 19 [2021-12-17 00:05:31,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:05:31,988 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-12-17 00:05:31,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:05:31,989 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-12-17 00:05:31,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-17 00:05:31,989 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:05:31,990 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:05:32,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-17 00:05:32,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:05:32,199 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:05:32,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:05:32,200 INFO L85 PathProgramCache]: Analyzing trace with hash -697412484, now seen corresponding path program 1 times [2021-12-17 00:05:32,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:05:32,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2031385206] [2021-12-17 00:05:32,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:05:32,207 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:05:32,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:05:32,208 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:05:32,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-17 00:05:32,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:05:32,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 00:05:32,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:05:32,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:05:32,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:05:32,329 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:05:32,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2031385206] [2021-12-17 00:05:32,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2031385206] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:05:32,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:05:32,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 00:05:32,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217835205] [2021-12-17 00:05:32,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:05:32,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 00:05:32,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:05:32,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 00:05:32,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 00:05:32,332 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:05:32,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:05:32,384 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2021-12-17 00:05:32,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 00:05:32,385 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-17 00:05:32,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:05:32,385 INFO L225 Difference]: With dead ends: 42 [2021-12-17 00:05:32,386 INFO L226 Difference]: Without dead ends: 38 [2021-12-17 00:05:32,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 00:05:32,387 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:05:32,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 71 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:05:32,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-17 00:05:32,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-17 00:05:32,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:05:32,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2021-12-17 00:05:32,395 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 19 [2021-12-17 00:05:32,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:05:32,395 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2021-12-17 00:05:32,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:05:32,396 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2021-12-17 00:05:32,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-17 00:05:32,396 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:05:32,396 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:05:32,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-17 00:05:32,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:05:32,605 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:05:32,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:05:32,606 INFO L85 PathProgramCache]: Analyzing trace with hash -145263842, now seen corresponding path program 1 times [2021-12-17 00:05:32,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:05:32,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1071140955] [2021-12-17 00:05:32,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:05:32,607 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:05:32,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:05:32,608 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:05:32,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-17 00:05:32,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:05:32,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 00:05:32,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:05:32,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 00:05:32,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:05:32,757 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:05:32,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1071140955] [2021-12-17 00:05:32,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1071140955] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:05:32,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:05:32,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 00:05:32,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127705836] [2021-12-17 00:05:32,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:05:32,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 00:05:32,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:05:32,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 00:05:32,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 00:05:32,763 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:05:32,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:05:32,851 INFO L93 Difference]: Finished difference Result 73 states and 95 transitions. [2021-12-17 00:05:32,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 00:05:32,854 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-17 00:05:32,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:05:32,855 INFO L225 Difference]: With dead ends: 73 [2021-12-17 00:05:32,855 INFO L226 Difference]: Without dead ends: 40 [2021-12-17 00:05:32,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 00:05:32,857 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 33 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:05:32,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 33 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 00:05:32,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-17 00:05:32,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-12-17 00:05:32,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 38 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:05:32,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2021-12-17 00:05:32,878 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 21 [2021-12-17 00:05:32,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:05:32,878 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2021-12-17 00:05:32,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:05:32,879 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2021-12-17 00:05:32,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-17 00:05:32,879 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:05:32,880 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:05:32,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-17 00:05:33,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:05:33,089 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:05:33,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:05:33,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1250455616, now seen corresponding path program 1 times [2021-12-17 00:05:33,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:05:33,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1316194914] [2021-12-17 00:05:33,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:05:33,091 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:05:33,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:05:33,092 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:05:33,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-17 00:05:33,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:05:33,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 00:05:33,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:05:33,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 00:05:33,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:05:33,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 00:05:33,392 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:05:33,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1316194914] [2021-12-17 00:05:33,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1316194914] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:05:33,396 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:05:33,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-12-17 00:05:33,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803033205] [2021-12-17 00:05:33,396 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:05:33,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 00:05:33,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:05:33,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 00:05:33,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 00:05:33,399 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:05:33,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:05:33,583 INFO L93 Difference]: Finished difference Result 75 states and 97 transitions. [2021-12-17 00:05:33,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 00:05:33,584 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-17 00:05:33,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:05:33,585 INFO L225 Difference]: With dead ends: 75 [2021-12-17 00:05:33,585 INFO L226 Difference]: Without dead ends: 42 [2021-12-17 00:05:33,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-12-17 00:05:33,587 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 29 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:05:33,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 30 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 00:05:33,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-17 00:05:33,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-12-17 00:05:33,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.3) internal successors, (52), 40 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:05:33,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2021-12-17 00:05:33,593 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 23 [2021-12-17 00:05:33,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:05:33,594 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2021-12-17 00:05:33,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:05:33,594 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2021-12-17 00:05:33,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-17 00:05:33,595 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:05:33,595 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:05:33,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-17 00:05:33,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:05:33,812 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:05:33,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:05:33,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1812138978, now seen corresponding path program 2 times [2021-12-17 00:05:33,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:05:33,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [525805353] [2021-12-17 00:05:33,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:05:33,814 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:05:33,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:05:33,815 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:05:33,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-17 00:05:33,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-17 00:05:33,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:05:33,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 00:05:33,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:05:33,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 00:05:33,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:05:33,960 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:05:33,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [525805353] [2021-12-17 00:05:33,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [525805353] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:05:33,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:05:33,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 00:05:33,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345069550] [2021-12-17 00:05:33,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:05:33,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 00:05:33,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:05:33,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 00:05:33,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 00:05:33,968 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:05:34,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:05:34,143 INFO L93 Difference]: Finished difference Result 70 states and 90 transitions. [2021-12-17 00:05:34,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 00:05:34,144 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-17 00:05:34,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:05:34,144 INFO L225 Difference]: With dead ends: 70 [2021-12-17 00:05:34,144 INFO L226 Difference]: Without dead ends: 42 [2021-12-17 00:05:34,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-17 00:05:34,146 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 67 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:05:34,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 14 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 00:05:34,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-17 00:05:34,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2021-12-17 00:05:34,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:05:34,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-12-17 00:05:34,151 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 25 [2021-12-17 00:05:34,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:05:34,151 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-12-17 00:05:34,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:05:34,151 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-12-17 00:05:34,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-17 00:05:34,152 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:05:34,152 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 00:05:34,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-17 00:05:34,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:05:34,363 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:05:34,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:05:34,364 INFO L85 PathProgramCache]: Analyzing trace with hash -160084788, now seen corresponding path program 1 times [2021-12-17 00:05:34,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:05:34,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1930881067] [2021-12-17 00:05:34,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:05:34,365 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:05:34,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:05:34,366 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:05:34,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-17 00:05:34,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:05:34,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 00:05:34,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:05:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 00:05:34,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:05:34,920 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 00:05:34,921 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:05:34,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1930881067] [2021-12-17 00:05:34,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1930881067] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:05:34,921 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:05:34,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-12-17 00:05:34,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858581549] [2021-12-17 00:05:34,921 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:05:34,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 00:05:34,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:05:34,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 00:05:34,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-12-17 00:05:34,922 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:05:35,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:05:35,452 INFO L93 Difference]: Finished difference Result 117 states and 146 transitions. [2021-12-17 00:05:35,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 00:05:35,453 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-17 00:05:35,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:05:35,454 INFO L225 Difference]: With dead ends: 117 [2021-12-17 00:05:35,455 INFO L226 Difference]: Without dead ends: 91 [2021-12-17 00:05:35,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2021-12-17 00:05:35,456 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 284 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 00:05:35,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 38 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 00:05:35,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-17 00:05:35,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2021-12-17 00:05:35,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0941176470588236) internal successors, (93), 85 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:05:35,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2021-12-17 00:05:35,467 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 35 [2021-12-17 00:05:35,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:05:35,467 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2021-12-17 00:05:35,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:05:35,468 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2021-12-17 00:05:35,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-17 00:05:35,469 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:05:35,469 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2021-12-17 00:05:35,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-17 00:05:35,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:05:35,679 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:05:35,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:05:35,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1337652904, now seen corresponding path program 2 times [2021-12-17 00:05:35,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:05:35,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1626628220] [2021-12-17 00:05:35,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:05:35,681 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:05:35,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:05:35,682 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:05:35,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-17 00:05:35,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:05:35,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:05:35,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-17 00:05:35,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:05:35,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 00:05:36,645 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-17 00:05:36,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 39 treesize of output 13 [2021-12-17 00:05:36,746 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:05:36,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:05:37,776 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 00:05:37,777 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:05:37,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1626628220] [2021-12-17 00:05:37,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1626628220] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:05:37,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:05:37,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-12-17 00:05:37,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058316487] [2021-12-17 00:05:37,778 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:05:37,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-17 00:05:37,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:05:37,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-17 00:05:37,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-12-17 00:05:37,780 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand has 23 states, 23 states have (on average 3.869565217391304) internal successors, (89), 23 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:05:41,121 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 00:05:44,366 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 00:05:47,831 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 00:05:49,939 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 00:05:51,989 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 00:05:52,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:05:52,156 INFO L93 Difference]: Finished difference Result 122 states and 134 transitions. [2021-12-17 00:05:52,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-17 00:05:52,156 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.869565217391304) internal successors, (89), 23 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-17 00:05:52,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:05:52,157 INFO L225 Difference]: With dead ends: 122 [2021-12-17 00:05:52,157 INFO L226 Difference]: Without dead ends: 82 [2021-12-17 00:05:52,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 61 SyntacticMatches, 11 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-12-17 00:05:52,158 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 35 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 13 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:05:52,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 139 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 496 Invalid, 5 Unknown, 25 Unchecked, 14.0s Time] [2021-12-17 00:05:52,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-17 00:05:52,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2021-12-17 00:05:52,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1538461538461537) internal successors, (90), 78 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:05:52,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2021-12-17 00:05:52,182 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 47 [2021-12-17 00:05:52,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:05:52,184 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2021-12-17 00:05:52,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.869565217391304) internal successors, (89), 23 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:05:52,184 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2021-12-17 00:05:52,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-17 00:05:52,188 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:05:52,188 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-12-17 00:05:52,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-17 00:05:52,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:05:52,389 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:05:52,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:05:52,390 INFO L85 PathProgramCache]: Analyzing trace with hash -436136292, now seen corresponding path program 3 times [2021-12-17 00:05:52,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:05:52,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1499630052] [2021-12-17 00:05:52,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 00:05:52,391 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:05:52,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:05:52,392 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:05:52,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-17 00:05:52,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-17 00:05:52,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:05:52,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 00:05:52,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:05:52,834 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-17 00:05:52,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:05:53,126 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-17 00:05:53,126 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:05:53,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1499630052] [2021-12-17 00:05:53,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1499630052] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:05:53,127 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:05:53,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-12-17 00:05:53,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042284479] [2021-12-17 00:05:53,127 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:05:53,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 00:05:53,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:05:53,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 00:05:53,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-12-17 00:05:53,129 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:05:53,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:05:53,562 INFO L93 Difference]: Finished difference Result 126 states and 146 transitions. [2021-12-17 00:05:53,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 00:05:53,563 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-17 00:05:53,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:05:53,564 INFO L225 Difference]: With dead ends: 126 [2021-12-17 00:05:53,564 INFO L226 Difference]: Without dead ends: 69 [2021-12-17 00:05:53,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2021-12-17 00:05:53,565 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 150 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 00:05:53,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 32 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 00:05:53,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-17 00:05:53,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2021-12-17 00:05:53,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 61 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:05:53,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2021-12-17 00:05:53,583 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 51 [2021-12-17 00:05:53,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:05:53,584 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2021-12-17 00:05:53,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:05:53,584 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2021-12-17 00:05:53,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-17 00:05:53,584 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:05:53,585 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:05:53,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-17 00:05:53,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:05:53,786 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:05:53,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:05:53,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1781065978, now seen corresponding path program 4 times [2021-12-17 00:05:53,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:05:53,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2086242752] [2021-12-17 00:05:53,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 00:05:53,787 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:05:53,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:05:53,788 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:05:53,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-17 00:05:55,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 00:05:55,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:05:55,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-17 00:05:55,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:05:55,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 00:05:56,982 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-12-17 00:05:56,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 16 [2021-12-17 00:05:57,104 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:05:57,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:06:05,621 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 00:06:05,621 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:06:05,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2086242752] [2021-12-17 00:06:05,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2086242752] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:06:05,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:06:05,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 32 [2021-12-17 00:06:05,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871785874] [2021-12-17 00:06:05,622 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:06:05,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-17 00:06:05,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:06:05,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-17 00:06:05,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=900, Unknown=2, NotChecked=0, Total=992 [2021-12-17 00:06:05,624 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 32 states, 32 states have (on average 3.59375) internal successors, (115), 32 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:06:08,339 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 00:06:10,813 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 00:06:15,805 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 00:06:20,215 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 00:06:22,391 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 00:06:24,314 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 00:06:27,208 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 00:06:29,362 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 00:06:31,435 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 00:06:31,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:06:31,769 INFO L93 Difference]: Finished difference Result 156 states and 173 transitions. [2021-12-17 00:06:31,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 00:06:31,769 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.59375) internal successors, (115), 32 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-17 00:06:31,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:06:31,771 INFO L225 Difference]: With dead ends: 156 [2021-12-17 00:06:31,771 INFO L226 Difference]: Without dead ends: 152 [2021-12-17 00:06:31,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 79 SyntacticMatches, 12 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=121, Invalid=1283, Unknown=2, NotChecked=0, Total=1406 [2021-12-17 00:06:31,773 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 25 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 10 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 1296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 22.9s IncrementalHoareTripleChecker+Time [2021-12-17 00:06:31,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 156 Invalid, 1296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1221 Invalid, 8 Unknown, 57 Unchecked, 22.9s Time] [2021-12-17 00:06:31,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-12-17 00:06:31,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 99. [2021-12-17 00:06:31,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.1224489795918366) internal successors, (110), 98 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:06:31,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 110 transitions. [2021-12-17 00:06:31,783 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 110 transitions. Word has length 61 [2021-12-17 00:06:31,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:06:31,784 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 110 transitions. [2021-12-17 00:06:31,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.59375) internal successors, (115), 32 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:06:31,784 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 110 transitions. [2021-12-17 00:06:31,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-17 00:06:31,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:06:31,785 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:06:31,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-17 00:06:31,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:06:31,995 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:06:31,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:06:31,996 INFO L85 PathProgramCache]: Analyzing trace with hash 2140781352, now seen corresponding path program 5 times [2021-12-17 00:06:31,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:06:31,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1961189006] [2021-12-17 00:06:31,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 00:06:31,997 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:06:31,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:06:31,998 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:06:31,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-17 00:06:32,293 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-17 00:06:32,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:06:32,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-17 00:06:32,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:06:32,716 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-17 00:06:32,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:06:33,236 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-17 00:06:33,237 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:06:33,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1961189006] [2021-12-17 00:06:33,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1961189006] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:06:33,237 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:06:33,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2021-12-17 00:06:33,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946663661] [2021-12-17 00:06:33,237 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:06:33,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-17 00:06:33,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:06:33,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-17 00:06:33,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-12-17 00:06:33,239 INFO L87 Difference]: Start difference. First operand 99 states and 110 transitions. Second operand has 24 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 24 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:06:34,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:06:34,331 INFO L93 Difference]: Finished difference Result 221 states and 246 transitions. [2021-12-17 00:06:34,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 00:06:34,331 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 24 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-17 00:06:34,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:06:34,332 INFO L225 Difference]: With dead ends: 221 [2021-12-17 00:06:34,333 INFO L226 Difference]: Without dead ends: 126 [2021-12-17 00:06:34,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=313, Invalid=1093, Unknown=0, NotChecked=0, Total=1406 [2021-12-17 00:06:34,334 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 424 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 378 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 378 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 00:06:34,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 59 Invalid, 1170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [378 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 00:06:34,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-17 00:06:34,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 106. [2021-12-17 00:06:34,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.1047619047619048) internal successors, (116), 105 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:06:34,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2021-12-17 00:06:34,344 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 63 [2021-12-17 00:06:34,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:06:34,344 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2021-12-17 00:06:34,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 24 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:06:34,344 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2021-12-17 00:06:34,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 00:06:34,345 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:06:34,345 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:06:34,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-17 00:06:34,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:06:34,558 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:06:34,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:06:34,559 INFO L85 PathProgramCache]: Analyzing trace with hash 156775434, now seen corresponding path program 6 times [2021-12-17 00:06:34,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:06:34,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5217549] [2021-12-17 00:06:34,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 00:06:34,559 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:06:34,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:06:34,560 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:06:34,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-17 00:06:34,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-17 00:06:34,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:06:34,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-17 00:06:34,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:06:35,168 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-17 00:06:35,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:06:35,667 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-17 00:06:35,668 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:06:35,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5217549] [2021-12-17 00:06:35,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5217549] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:06:35,668 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:06:35,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-12-17 00:06:35,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813491436] [2021-12-17 00:06:35,669 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:06:35,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-17 00:06:35,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:06:35,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-17 00:06:35,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-12-17 00:06:35,673 INFO L87 Difference]: Start difference. First operand 106 states and 116 transitions. Second operand has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 22 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:06:36,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:06:36,496 INFO L93 Difference]: Finished difference Result 119 states and 129 transitions. [2021-12-17 00:06:36,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 00:06:36,496 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 22 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-17 00:06:36,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:06:36,497 INFO L225 Difference]: With dead ends: 119 [2021-12-17 00:06:36,497 INFO L226 Difference]: Without dead ends: 83 [2021-12-17 00:06:36,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=264, Invalid=926, Unknown=0, NotChecked=0, Total=1190 [2021-12-17 00:06:36,500 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 209 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 00:06:36,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 32 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 00:06:36,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-17 00:06:36,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2021-12-17 00:06:36,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0933333333333333) internal successors, (82), 75 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:06:36,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2021-12-17 00:06:36,507 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 65 [2021-12-17 00:06:36,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:06:36,507 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2021-12-17 00:06:36,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 22 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:06:36,507 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2021-12-17 00:06:36,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-17 00:06:36,510 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:06:36,510 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:06:36,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-17 00:06:36,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:06:36,715 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:06:36,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:06:36,716 INFO L85 PathProgramCache]: Analyzing trace with hash 958143540, now seen corresponding path program 7 times [2021-12-17 00:06:36,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:06:36,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [12722272] [2021-12-17 00:06:36,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 00:06:36,717 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:06:36,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:06:36,721 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:06:36,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process Killed by 15