./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.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-industry-pattern/check_removal_from_set_after_insertion.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 07a8b8b198dffd8285677bd0bfdd16b4d1f780e3a9696ef3e27a077e8ff12a49 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 22:17:06,584 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 22:17:06,586 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 22:17:06,630 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 22:17:06,631 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 22:17:06,633 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 22:17:06,635 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 22:17:06,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 22:17:06,641 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 22:17:06,646 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 22:17:06,647 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 22:17:06,648 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 22:17:06,649 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 22:17:06,651 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 22:17:06,652 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 22:17:06,657 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 22:17:06,659 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 22:17:06,660 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 22:17:06,661 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 22:17:06,664 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 22:17:06,668 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 22:17:06,669 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 22:17:06,670 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 22:17:06,671 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 22:17:06,673 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 22:17:06,676 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 22:17:06,676 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 22:17:06,677 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 22:17:06,678 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 22:17:06,679 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 22:17:06,680 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 22:17:06,681 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 22:17:06,681 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 22:17:06,683 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 22:17:06,684 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 22:17:06,685 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 22:17:06,685 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 22:17:06,685 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 22:17:06,686 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 22:17:06,686 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 22:17:06,687 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 22:17:06,688 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 22:17:06,718 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 22:17:06,719 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 22:17:06,719 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 22:17:06,720 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 22:17:06,720 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 22:17:06,720 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 22:17:06,721 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 22:17:06,721 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 22:17:06,722 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 22:17:06,722 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 22:17:06,723 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 22:17:06,723 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 22:17:06,723 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 22:17:06,723 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 22:17:06,723 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 22:17:06,724 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 22:17:06,724 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 22:17:06,724 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 22:17:06,724 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 22:17:06,724 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 22:17:06,725 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 22:17:06,725 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 22:17:06,725 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 22:17:06,725 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 22:17:06,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 22:17:06,726 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 22:17:06,726 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 22:17:06,726 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 22:17:06,726 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 22:17:06,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 22:17:06,727 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 22:17:06,727 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 22:17:06,727 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 22:17:06,728 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 22:17:06,728 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 07a8b8b198dffd8285677bd0bfdd16b4d1f780e3a9696ef3e27a077e8ff12a49 [2021-12-16 22:17:06,912 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 22:17:06,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 22:17:06,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 22:17:06,941 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 22:17:06,942 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 22:17:06,943 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c [2021-12-16 22:17:06,993 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a03fcbb1/3b22d9ce15d34b8eb668b4b23db22aaf/FLAG22847c79d [2021-12-16 22:17:07,393 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 22:17:07,394 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c [2021-12-16 22:17:07,401 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a03fcbb1/3b22d9ce15d34b8eb668b4b23db22aaf/FLAG22847c79d [2021-12-16 22:17:07,827 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a03fcbb1/3b22d9ce15d34b8eb668b4b23db22aaf [2021-12-16 22:17:07,829 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 22:17:07,829 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 22:17:07,831 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 22:17:07,831 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 22:17:07,835 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 22:17:07,836 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 10:17:07" (1/1) ... [2021-12-16 22:17:07,837 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d96f8f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:17:07, skipping insertion in model container [2021-12-16 22:17:07,837 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 10:17:07" (1/1) ... [2021-12-16 22:17:07,842 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 22:17:07,856 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 22:17:07,977 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-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2021-12-16 22:17:08,005 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 22:17:08,011 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 22:17:08,028 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-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2021-12-16 22:17:08,045 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 22:17:08,060 INFO L208 MainTranslator]: Completed translation [2021-12-16 22:17:08,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:17:08 WrapperNode [2021-12-16 22:17:08,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 22:17:08,062 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 22:17:08,062 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 22:17:08,062 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 22:17:08,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:17:08" (1/1) ... [2021-12-16 22:17:08,083 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:17:08" (1/1) ... [2021-12-16 22:17:08,109 INFO L137 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 131 [2021-12-16 22:17:08,110 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 22:17:08,111 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 22:17:08,111 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 22:17:08,111 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 22:17:08,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:17:08" (1/1) ... [2021-12-16 22:17:08,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:17:08" (1/1) ... [2021-12-16 22:17:08,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:17:08" (1/1) ... [2021-12-16 22:17:08,129 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:17:08" (1/1) ... [2021-12-16 22:17:08,140 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:17:08" (1/1) ... [2021-12-16 22:17:08,146 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:17:08" (1/1) ... [2021-12-16 22:17:08,147 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:17:08" (1/1) ... [2021-12-16 22:17:08,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 22:17:08,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 22:17:08,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 22:17:08,150 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 22:17:08,151 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:17:08" (1/1) ... [2021-12-16 22:17:08,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 22:17:08,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:08,175 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 22:17:08,185 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 22:17:08,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 22:17:08,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 22:17:08,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 22:17:08,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 22:17:08,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 22:17:08,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 22:17:08,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 22:17:08,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 22:17:08,265 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 22:17:08,266 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 22:17:08,378 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 22:17:08,383 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 22:17:08,383 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-16 22:17:08,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 10:17:08 BoogieIcfgContainer [2021-12-16 22:17:08,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 22:17:08,386 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 22:17:08,386 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 22:17:08,389 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 22:17:08,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 10:17:07" (1/3) ... [2021-12-16 22:17:08,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33a29bbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 10:17:08, skipping insertion in model container [2021-12-16 22:17:08,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:17:08" (2/3) ... [2021-12-16 22:17:08,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33a29bbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 10:17:08, skipping insertion in model container [2021-12-16 22:17:08,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 10:17:08" (3/3) ... [2021-12-16 22:17:08,391 INFO L111 eAbstractionObserver]: Analyzing ICFG check_removal_from_set_after_insertion.c [2021-12-16 22:17:08,412 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 22:17:08,412 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 22:17:08,494 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 22:17:08,500 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 22:17:08,500 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 22:17:08,518 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 31 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) [2021-12-16 22:17:08,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-16 22:17:08,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:08,522 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:08,523 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:08,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:08,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1525882359, now seen corresponding path program 1 times [2021-12-16 22:17:08,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:08,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340715961] [2021-12-16 22:17:08,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:08,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:08,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:08,699 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 22:17:08,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:08,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340715961] [2021-12-16 22:17:08,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340715961] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:17:08,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:17:08,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 22:17:08,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495075571] [2021-12-16 22:17:08,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:17:08,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 22:17:08,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:08,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 22:17:08,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 22:17:08,738 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 31 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) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:08,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:08,830 INFO L93 Difference]: Finished difference Result 77 states and 118 transitions. [2021-12-16 22:17:08,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 22:17:08,833 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-16 22:17:08,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:08,838 INFO L225 Difference]: With dead ends: 77 [2021-12-16 22:17:08,838 INFO L226 Difference]: Without dead ends: 41 [2021-12-16 22:17:08,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 22:17:08,847 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 55 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:08,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 49 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:17:08,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-16 22:17:08,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2021-12-16 22:17:08,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:08,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2021-12-16 22:17:08,879 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 12 [2021-12-16 22:17:08,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:08,879 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2021-12-16 22:17:08,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:08,879 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2021-12-16 22:17:08,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-16 22:17:08,880 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:08,880 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:08,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 22:17:08,881 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:08,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:08,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1053753351, now seen corresponding path program 1 times [2021-12-16 22:17:08,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:08,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022809894] [2021-12-16 22:17:08,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:08,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:08,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:08,936 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 22:17:08,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:08,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022809894] [2021-12-16 22:17:08,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022809894] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:17:08,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:17:08,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 22:17:08,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024473331] [2021-12-16 22:17:08,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:17:08,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 22:17:08,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:08,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 22:17:08,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 22:17:08,945 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:08,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:08,987 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2021-12-16 22:17:08,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 22:17:08,988 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-16 22:17:08,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:08,989 INFO L225 Difference]: With dead ends: 52 [2021-12-16 22:17:08,989 INFO L226 Difference]: Without dead ends: 38 [2021-12-16 22:17:08,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 22:17:08,991 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 43 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:08,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 48 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:17:08,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-16 22:17:08,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2021-12-16 22:17:08,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:08,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2021-12-16 22:17:08,997 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 14 [2021-12-16 22:17:08,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:08,998 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2021-12-16 22:17:08,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:08,998 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2021-12-16 22:17:08,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-16 22:17:08,999 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:08,999 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] [2021-12-16 22:17:08,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 22:17:09,000 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:09,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:09,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1072948653, now seen corresponding path program 1 times [2021-12-16 22:17:09,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:09,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122908654] [2021-12-16 22:17:09,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:09,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:09,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:09,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 22:17:09,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:09,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122908654] [2021-12-16 22:17:09,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122908654] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:17:09,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:17:09,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 22:17:09,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968203030] [2021-12-16 22:17:09,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:17:09,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 22:17:09,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:09,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 22:17:09,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 22:17:09,115 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:09,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:09,168 INFO L93 Difference]: Finished difference Result 90 states and 119 transitions. [2021-12-16 22:17:09,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 22:17:09,169 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-16 22:17:09,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:09,170 INFO L225 Difference]: With dead ends: 90 [2021-12-16 22:17:09,171 INFO L226 Difference]: Without dead ends: 67 [2021-12-16 22:17:09,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 22:17:09,174 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 72 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:09,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 96 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:17:09,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-16 22:17:09,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 36. [2021-12-16 22:17:09,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 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 22:17:09,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2021-12-16 22:17:09,184 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 20 [2021-12-16 22:17:09,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:09,186 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2021-12-16 22:17:09,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:09,186 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2021-12-16 22:17:09,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-16 22:17:09,187 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:09,187 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] [2021-12-16 22:17:09,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 22:17:09,188 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:09,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:09,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1602550877, now seen corresponding path program 1 times [2021-12-16 22:17:09,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:09,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072878362] [2021-12-16 22:17:09,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:09,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:09,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:09,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 22:17:09,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:09,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072878362] [2021-12-16 22:17:09,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072878362] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:17:09,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:17:09,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 22:17:09,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169658439] [2021-12-16 22:17:09,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:17:09,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 22:17:09,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:09,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 22:17:09,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 22:17:09,265 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:09,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:09,299 INFO L93 Difference]: Finished difference Result 82 states and 108 transitions. [2021-12-16 22:17:09,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 22:17:09,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-16 22:17:09,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:09,300 INFO L225 Difference]: With dead ends: 82 [2021-12-16 22:17:09,300 INFO L226 Difference]: Without dead ends: 53 [2021-12-16 22:17:09,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 22:17:09,305 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 22 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:09,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 103 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:17:09,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-16 22:17:09,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 33. [2021-12-16 22:17:09,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.3125) internal successors, (42), 32 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 22:17:09,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-12-16 22:17:09,316 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 20 [2021-12-16 22:17:09,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:09,317 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-12-16 22:17:09,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:09,317 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-12-16 22:17:09,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-16 22:17:09,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:09,318 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 22:17:09,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 22:17:09,319 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:09,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:09,320 INFO L85 PathProgramCache]: Analyzing trace with hash -969039925, now seen corresponding path program 1 times [2021-12-16 22:17:09,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:09,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108758210] [2021-12-16 22:17:09,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:09,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:09,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:09,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 22:17:09,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:09,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108758210] [2021-12-16 22:17:09,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108758210] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:17:09,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:17:09,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 22:17:09,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70000092] [2021-12-16 22:17:09,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:17:09,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 22:17:09,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:09,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 22:17:09,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 22:17:09,401 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 3 states, 3 states have (on average 7.0) 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) [2021-12-16 22:17:09,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:09,426 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2021-12-16 22:17:09,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 22:17:09,427 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) 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 [2021-12-16 22:17:09,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:09,427 INFO L225 Difference]: With dead ends: 46 [2021-12-16 22:17:09,428 INFO L226 Difference]: Without dead ends: 35 [2021-12-16 22:17:09,428 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 22:17:09,429 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 22 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:09,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 46 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:17:09,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-16 22:17:09,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-12-16 22:17:09,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 0 states have call successors, (0), 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 22:17:09,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2021-12-16 22:17:09,440 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 21 [2021-12-16 22:17:09,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:09,440 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2021-12-16 22:17:09,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) 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) [2021-12-16 22:17:09,440 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2021-12-16 22:17:09,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 22:17:09,441 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:09,441 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] [2021-12-16 22:17:09,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 22:17:09,441 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:09,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:09,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1842211539, now seen corresponding path program 1 times [2021-12-16 22:17:09,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:09,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340185289] [2021-12-16 22:17:09,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:09,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:09,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 22:17:09,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:09,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340185289] [2021-12-16 22:17:09,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340185289] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:09,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696343046] [2021-12-16 22:17:09,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:09,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:09,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:09,511 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 22:17:09,512 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 22:17:09,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:09,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 22:17:09,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:09,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 22:17:09,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:09,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 22:17:09,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696343046] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:09,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:09,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-12-16 22:17:09,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993765053] [2021-12-16 22:17:09,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:09,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 22:17:09,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:09,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 22:17:09,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-12-16 22:17:09,761 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 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) [2021-12-16 22:17:09,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:09,916 INFO L93 Difference]: Finished difference Result 141 states and 173 transitions. [2021-12-16 22:17:09,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 22:17:09,916 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 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) Word has length 25 [2021-12-16 22:17:09,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:09,921 INFO L225 Difference]: With dead ends: 141 [2021-12-16 22:17:09,921 INFO L226 Difference]: Without dead ends: 111 [2021-12-16 22:17:09,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2021-12-16 22:17:09,927 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 135 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:09,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 92 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:17:09,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-12-16 22:17:09,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 51. [2021-12-16 22:17:09,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 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 22:17:09,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2021-12-16 22:17:09,945 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 25 [2021-12-16 22:17:09,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:09,946 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2021-12-16 22:17:09,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 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) [2021-12-16 22:17:09,946 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2021-12-16 22:17:09,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-16 22:17:09,947 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:09,947 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:09,974 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 22:17:10,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-16 22:17:10,164 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:10,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:10,164 INFO L85 PathProgramCache]: Analyzing trace with hash 492833075, now seen corresponding path program 2 times [2021-12-16 22:17:10,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:10,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897421502] [2021-12-16 22:17:10,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:10,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:10,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:10,227 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-16 22:17:10,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:10,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897421502] [2021-12-16 22:17:10,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897421502] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:17:10,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:17:10,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 22:17:10,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289264860] [2021-12-16 22:17:10,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:17:10,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 22:17:10,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:10,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 22:17:10,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 22:17:10,230 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:10,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:10,239 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2021-12-16 22:17:10,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 22:17:10,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-16 22:17:10,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:10,241 INFO L225 Difference]: With dead ends: 66 [2021-12-16 22:17:10,241 INFO L226 Difference]: Without dead ends: 51 [2021-12-16 22:17:10,241 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 22:17:10,242 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 12 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:10,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:17:10,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-16 22:17:10,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-12-16 22:17:10,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.18) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 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 22:17:10,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2021-12-16 22:17:10,250 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 34 [2021-12-16 22:17:10,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:10,250 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2021-12-16 22:17:10,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:17:10,251 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2021-12-16 22:17:10,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-16 22:17:10,251 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:10,251 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 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 22:17:10,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-16 22:17:10,252 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:10,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:10,252 INFO L85 PathProgramCache]: Analyzing trace with hash 750998513, now seen corresponding path program 1 times [2021-12-16 22:17:10,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:10,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103738901] [2021-12-16 22:17:10,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:10,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:10,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:10,326 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 22:17:10,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:10,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103738901] [2021-12-16 22:17:10,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103738901] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:10,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185095708] [2021-12-16 22:17:10,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:10,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:10,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:10,328 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 22:17:10,347 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 22:17:10,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:10,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 22:17:10,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:10,562 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 22:17:10,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:10,698 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 22:17:10,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185095708] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:10,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:10,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2021-12-16 22:17:10,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065033476] [2021-12-16 22:17:10,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:10,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 22:17:10,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:10,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 22:17:10,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=195, Unknown=0, NotChecked=0, Total=342 [2021-12-16 22:17:10,701 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 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 22:17:10,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:10,928 INFO L93 Difference]: Finished difference Result 204 states and 234 transitions. [2021-12-16 22:17:10,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 22:17:10,928 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 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 34 [2021-12-16 22:17:10,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:10,929 INFO L225 Difference]: With dead ends: 204 [2021-12-16 22:17:10,929 INFO L226 Difference]: Without dead ends: 164 [2021-12-16 22:17:10,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=222, Invalid=330, Unknown=0, NotChecked=0, Total=552 [2021-12-16 22:17:10,930 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 253 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:10,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 150 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:17:10,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-16 22:17:10,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 63. [2021-12-16 22:17:10,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 62 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) [2021-12-16 22:17:10,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2021-12-16 22:17:10,937 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 34 [2021-12-16 22:17:10,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:10,938 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2021-12-16 22:17:10,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 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 22:17:10,938 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2021-12-16 22:17:10,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-16 22:17:10,939 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:10,939 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 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 22:17:10,965 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 22:17:11,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-16 22:17:11,160 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:11,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:11,160 INFO L85 PathProgramCache]: Analyzing trace with hash -452665475, now seen corresponding path program 2 times [2021-12-16 22:17:11,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:11,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112418251] [2021-12-16 22:17:11,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:11,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:11,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:11,356 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 22:17:11,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:11,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112418251] [2021-12-16 22:17:11,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112418251] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:11,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052406047] [2021-12-16 22:17:11,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:17:11,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:11,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:11,358 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 22:17:11,360 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 22:17:11,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:17:11,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:17:11,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-16 22:17:11,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:11,707 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 22:17:11,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:11,983 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 22:17:11,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052406047] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:11,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:11,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2021-12-16 22:17:11,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660522235] [2021-12-16 22:17:11,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:11,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-16 22:17:11,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:11,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-16 22:17:11,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=753, Unknown=0, NotChecked=0, Total=1332 [2021-12-16 22:17:11,987 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 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) [2021-12-16 22:17:12,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:12,526 INFO L93 Difference]: Finished difference Result 372 states and 420 transitions. [2021-12-16 22:17:12,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-16 22:17:12,527 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 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 46 [2021-12-16 22:17:12,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:12,529 INFO L225 Difference]: With dead ends: 372 [2021-12-16 22:17:12,529 INFO L226 Difference]: Without dead ends: 332 [2021-12-16 22:17:12,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=876, Invalid=1380, Unknown=0, NotChecked=0, Total=2256 [2021-12-16 22:17:12,533 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 1047 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1047 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:12,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1047 Valid, 203 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 22:17:12,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-12-16 22:17:12,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 87. [2021-12-16 22:17:12,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.1046511627906976) internal successors, (95), 86 states have internal predecessors, (95), 0 states have call successors, (0), 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 22:17:12,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2021-12-16 22:17:12,552 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 46 [2021-12-16 22:17:12,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:12,553 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2021-12-16 22:17:12,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 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) [2021-12-16 22:17:12,553 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2021-12-16 22:17:12,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-16 22:17:12,561 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:12,562 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 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 22:17:12,588 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 22:17:12,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:12,776 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:12,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:12,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1586487147, now seen corresponding path program 3 times [2021-12-16 22:17:12,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:12,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358295836] [2021-12-16 22:17:12,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:12,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:12,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:13,173 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 22:17:13,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:13,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358295836] [2021-12-16 22:17:13,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358295836] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:13,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696878655] [2021-12-16 22:17:13,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:17:13,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:13,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:13,175 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 22:17:13,176 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 22:17:13,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-16 22:17:13,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:17:13,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 22:17:13,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:13,422 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2021-12-16 22:17:13,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:13,584 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2021-12-16 22:17:13,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696878655] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:13,585 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:13,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 4, 4] total 30 [2021-12-16 22:17:13,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416071903] [2021-12-16 22:17:13,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:13,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-16 22:17:13,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:13,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-16 22:17:13,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=605, Unknown=0, NotChecked=0, Total=930 [2021-12-16 22:17:13,587 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand has 31 states, 31 states have (on average 3.064516129032258) internal successors, (95), 30 states have internal predecessors, (95), 0 states have call successors, (0), 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 22:17:14,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:14,250 INFO L93 Difference]: Finished difference Result 427 states and 474 transitions. [2021-12-16 22:17:14,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-16 22:17:14,255 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.064516129032258) internal successors, (95), 30 states have internal predecessors, (95), 0 states have call successors, (0), 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 70 [2021-12-16 22:17:14,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:14,261 INFO L225 Difference]: With dead ends: 427 [2021-12-16 22:17:14,261 INFO L226 Difference]: Without dead ends: 387 [2021-12-16 22:17:14,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=935, Invalid=2035, Unknown=0, NotChecked=0, Total=2970 [2021-12-16 22:17:14,263 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 938 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 938 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:14,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [938 Valid, 228 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 22:17:14,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-12-16 22:17:14,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 117. [2021-12-16 22:17:14,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.1293103448275863) internal successors, (131), 116 states have internal predecessors, (131), 0 states have call successors, (0), 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 22:17:14,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 131 transitions. [2021-12-16 22:17:14,272 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 131 transitions. Word has length 70 [2021-12-16 22:17:14,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:14,272 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 131 transitions. [2021-12-16 22:17:14,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.064516129032258) internal successors, (95), 30 states have internal predecessors, (95), 0 states have call successors, (0), 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 22:17:14,273 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 131 transitions. [2021-12-16 22:17:14,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-16 22:17:14,274 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:14,274 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:14,297 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 22:17:14,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:14,488 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:14,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:14,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1867228667, now seen corresponding path program 1 times [2021-12-16 22:17:14,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:14,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051633109] [2021-12-16 22:17:14,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:14,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:14,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:14,864 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-16 22:17:14,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:14,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051633109] [2021-12-16 22:17:14,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051633109] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:14,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187525464] [2021-12-16 22:17:14,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:14,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:14,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:14,872 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 22:17:14,873 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 22:17:15,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:15,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-16 22:17:15,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:15,630 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-16 22:17:15,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:16,468 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-16 22:17:16,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187525464] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:16,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:16,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 75 [2021-12-16 22:17:16,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519312105] [2021-12-16 22:17:16,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:16,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-12-16 22:17:16,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:16,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-12-16 22:17:16,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2503, Invalid=3197, Unknown=0, NotChecked=0, Total=5700 [2021-12-16 22:17:16,475 INFO L87 Difference]: Start difference. First operand 117 states and 131 transitions. Second operand has 76 states, 76 states have (on average 2.236842105263158) internal successors, (170), 75 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 22:17:18,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:18,124 INFO L93 Difference]: Finished difference Result 792 states and 891 transitions. [2021-12-16 22:17:18,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-16 22:17:18,124 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.236842105263158) internal successors, (170), 75 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) Word has length 90 [2021-12-16 22:17:18,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:18,127 INFO L225 Difference]: With dead ends: 792 [2021-12-16 22:17:18,127 INFO L226 Difference]: Without dead ends: 724 [2021-12-16 22:17:18,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3501 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3775, Invalid=6125, Unknown=0, NotChecked=0, Total=9900 [2021-12-16 22:17:18,130 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 2397 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 590 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2397 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 590 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:18,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2397 Valid, 339 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [590 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-16 22:17:18,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2021-12-16 22:17:18,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 167. [2021-12-16 22:17:18,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.0903614457831325) internal successors, (181), 166 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 22:17:18,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 181 transitions. [2021-12-16 22:17:18,141 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 181 transitions. Word has length 90 [2021-12-16 22:17:18,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:18,142 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 181 transitions. [2021-12-16 22:17:18,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.236842105263158) internal successors, (170), 75 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 22:17:18,142 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 181 transitions. [2021-12-16 22:17:18,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-16 22:17:18,143 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:18,143 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:18,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 22:17:18,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-16 22:17:18,362 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:18,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:18,362 INFO L85 PathProgramCache]: Analyzing trace with hash 838087341, now seen corresponding path program 2 times [2021-12-16 22:17:18,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:18,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881780365] [2021-12-16 22:17:18,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:18,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:18,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:19,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-16 22:17:19,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:19,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881780365] [2021-12-16 22:17:19,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881780365] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:19,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388051904] [2021-12-16 22:17:19,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:17:19,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:19,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:19,432 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 22:17:19,433 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 22:17:19,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:17:19,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:17:19,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 1089 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-16 22:17:19,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:21,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-16 22:17:21,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:23,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-16 22:17:23,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388051904] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:23,659 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:23,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 150 [2021-12-16 22:17:23,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028886040] [2021-12-16 22:17:23,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:23,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2021-12-16 22:17:23,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:23,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2021-12-16 22:17:23,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10003, Invalid=12647, Unknown=0, NotChecked=0, Total=22650 [2021-12-16 22:17:23,666 INFO L87 Difference]: Start difference. First operand 167 states and 181 transitions. Second operand has 151 states, 151 states have (on average 2.119205298013245) internal successors, (320), 150 states have internal predecessors, (320), 0 states have call successors, (0), 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 22:17:30,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:30,597 INFO L93 Difference]: Finished difference Result 1492 states and 1666 transitions. [2021-12-16 22:17:30,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-12-16 22:17:30,598 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 2.119205298013245) internal successors, (320), 150 states have internal predecessors, (320), 0 states have call successors, (0), 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 140 [2021-12-16 22:17:30,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:30,603 INFO L225 Difference]: With dead ends: 1492 [2021-12-16 22:17:30,603 INFO L226 Difference]: Without dead ends: 1424 [2021-12-16 22:17:30,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14501 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=15050, Invalid=24750, Unknown=0, NotChecked=0, Total=39800 [2021-12-16 22:17:30,610 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 5085 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 1299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5085 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 2326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1299 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:30,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5085 Valid, 685 Invalid, 2326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1299 Valid, 1027 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-16 22:17:30,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2021-12-16 22:17:30,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 267. [2021-12-16 22:17:30,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.056390977443609) internal successors, (281), 266 states have internal predecessors, (281), 0 states have call successors, (0), 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 22:17:30,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 281 transitions. [2021-12-16 22:17:30,627 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 281 transitions. Word has length 140 [2021-12-16 22:17:30,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:30,628 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 281 transitions. [2021-12-16 22:17:30,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 2.119205298013245) internal successors, (320), 150 states have internal predecessors, (320), 0 states have call successors, (0), 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 22:17:30,628 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 281 transitions. [2021-12-16 22:17:30,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-12-16 22:17:30,630 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:30,630 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:30,650 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 22:17:30,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:30,839 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:30,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:30,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1802074769, now seen corresponding path program 3 times [2021-12-16 22:17:30,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:30,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695059665] [2021-12-16 22:17:30,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:30,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:31,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:34,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9646 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-16 22:17:34,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:34,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695059665] [2021-12-16 22:17:34,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695059665] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:34,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024004213] [2021-12-16 22:17:34,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:17:34,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:34,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:34,448 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 22:17:34,449 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 22:17:34,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-16 22:17:34,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:17:34,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 22:17:34,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:35,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9646 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9641 trivial. 0 not checked. [2021-12-16 22:17:35,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:35,777 INFO L134 CoverageAnalysis]: Checked inductivity of 9646 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9641 trivial. 0 not checked. [2021-12-16 22:17:35,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024004213] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:35,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:35,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 5, 5] total 108 [2021-12-16 22:17:35,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974832943] [2021-12-16 22:17:35,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:35,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2021-12-16 22:17:35,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:35,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-12-16 22:17:35,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5478, Invalid=6294, Unknown=0, NotChecked=0, Total=11772 [2021-12-16 22:17:35,783 INFO L87 Difference]: Start difference. First operand 267 states and 281 transitions. Second operand has 109 states, 109 states have (on average 2.532110091743119) internal successors, (276), 108 states have internal predecessors, (276), 0 states have call successors, (0), 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 22:18:01,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:18:01,486 INFO L93 Difference]: Finished difference Result 2964 states and 3197 transitions. [2021-12-16 22:18:01,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 308 states. [2021-12-16 22:18:01,486 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.532110091743119) internal successors, (276), 108 states have internal predecessors, (276), 0 states have call successors, (0), 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 240 [2021-12-16 22:18:01,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:18:01,494 INFO L225 Difference]: With dead ends: 2964 [2021-12-16 22:18:01,494 INFO L226 Difference]: Without dead ends: 2896 [2021-12-16 22:18:01,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 881 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 409 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46174 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=53146, Invalid=115364, Unknown=0, NotChecked=0, Total=168510 [2021-12-16 22:18:01,506 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 10858 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 1314 mSolverCounterSat, 3848 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10858 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 5162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3848 IncrementalHoareTripleChecker+Valid, 1314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:18:01,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10858 Valid, 1021 Invalid, 5162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3848 Valid, 1314 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-16 22:18:01,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2896 states. [2021-12-16 22:18:01,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2896 to 770. [2021-12-16 22:18:01,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 1.1495448634590377) internal successors, (884), 769 states have internal predecessors, (884), 0 states have call successors, (0), 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 22:18:01,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 884 transitions. [2021-12-16 22:18:01,636 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 884 transitions. Word has length 240 [2021-12-16 22:18:01,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:18:01,636 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 884 transitions. [2021-12-16 22:18:01,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.532110091743119) internal successors, (276), 108 states have internal predecessors, (276), 0 states have call successors, (0), 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 22:18:01,637 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 884 transitions. [2021-12-16 22:18:01,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-12-16 22:18:01,639 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:18:01,639 INFO L514 BasicCegarLoop]: trace histogram [101, 101, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:18:01,660 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 22:18:01,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:18:01,851 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:18:01,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:18:01,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1263380961, now seen corresponding path program 1 times [2021-12-16 22:18:01,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:18:01,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399036641] [2021-12-16 22:18:01,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:18:01,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:18:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:05,909 INFO L134 CoverageAnalysis]: Checked inductivity of 10251 backedges. 0 proven. 10201 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-16 22:18:05,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:18:05,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399036641] [2021-12-16 22:18:05,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399036641] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:18:05,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457546643] [2021-12-16 22:18:05,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:18:05,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:18:05,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:18:05,911 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 22:18:05,915 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 22:18:06,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:18:06,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 2004 conjuncts, 104 conjunts are in the unsatisfiable core [2021-12-16 22:18:06,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:18:10,957 INFO L134 CoverageAnalysis]: Checked inductivity of 10251 backedges. 0 proven. 10201 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-16 22:18:10,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:18:21,423 INFO L134 CoverageAnalysis]: Checked inductivity of 10251 backedges. 0 proven. 10201 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-16 22:18:21,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457546643] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:18:21,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:18:21,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104, 104] total 309 [2021-12-16 22:18:21,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593512252] [2021-12-16 22:18:21,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:18:21,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 310 states [2021-12-16 22:18:21,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:18:21,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 310 interpolants. [2021-12-16 22:18:21,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42439, Invalid=53351, Unknown=0, NotChecked=0, Total=95790 [2021-12-16 22:18:21,437 INFO L87 Difference]: Start difference. First operand 770 states and 884 transitions. Second operand has 310 states, 310 states have (on average 2.064516129032258) internal successors, (640), 309 states have internal predecessors, (640), 0 states have call successors, (0), 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 22:19:27,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:19:27,989 INFO L93 Difference]: Finished difference Result 3668 states and 4101 transitions. [2021-12-16 22:19:27,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 207 states. [2021-12-16 22:19:27,990 INFO L78 Accepts]: Start accepts. Automaton has has 310 states, 310 states have (on average 2.064516129032258) internal successors, (640), 309 states have internal predecessors, (640), 0 states have call successors, (0), 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 251 [2021-12-16 22:19:27,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:19:27,997 INFO L225 Difference]: With dead ends: 3668 [2021-12-16 22:19:27,998 INFO L226 Difference]: Without dead ends: 3103 [2021-12-16 22:19:28,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 410 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62625 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=63757, Invalid=105575, Unknown=0, NotChecked=0, Total=169332 [2021-12-16 22:19:28,006 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 11090 mSDsluCounter, 1316 mSDsCounter, 0 mSdLazyCounter, 2078 mSolverCounterSat, 2678 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11090 SdHoareTripleChecker+Valid, 1337 SdHoareTripleChecker+Invalid, 4756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2678 IncrementalHoareTripleChecker+Valid, 2078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:19:28,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11090 Valid, 1337 Invalid, 4756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2678 Valid, 2078 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-16 22:19:28,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3103 states. [2021-12-16 22:19:28,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3103 to 976. [2021-12-16 22:19:28,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 975 states have (on average 1.117948717948718) internal successors, (1090), 975 states have internal predecessors, (1090), 0 states have call successors, (0), 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 22:19:28,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1090 transitions. [2021-12-16 22:19:28,139 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1090 transitions. Word has length 251 [2021-12-16 22:19:28,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:19:28,139 INFO L470 AbstractCegarLoop]: Abstraction has 976 states and 1090 transitions. [2021-12-16 22:19:28,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 310 states, 310 states have (on average 2.064516129032258) internal successors, (640), 309 states have internal predecessors, (640), 0 states have call successors, (0), 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 22:19:28,139 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1090 transitions. [2021-12-16 22:19:28,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2021-12-16 22:19:28,144 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:19:28,145 INFO L514 BasicCegarLoop]: trace histogram [204, 204, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:19:28,171 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 22:19:28,360 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,SelfDestructingSolverStorable13 [2021-12-16 22:19:28,360 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:19:28,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:19:28,360 INFO L85 PathProgramCache]: Analyzing trace with hash -148650991, now seen corresponding path program 2 times [2021-12-16 22:19:28,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:19:28,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282418895] [2021-12-16 22:19:28,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:19:28,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:19:28,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:19:42,499 INFO L134 CoverageAnalysis]: Checked inductivity of 41666 backedges. 0 proven. 41616 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-16 22:19:42,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:19:42,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282418895] [2021-12-16 22:19:42,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282418895] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:19:42,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213667034] [2021-12-16 22:19:42,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:19:42,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:19:42,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:19:42,504 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 22:19:42,508 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 22:19:43,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:19:43,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:19:43,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 3755 conjuncts, 207 conjunts are in the unsatisfiable core [2021-12-16 22:19:43,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:19:59,473 INFO L134 CoverageAnalysis]: Checked inductivity of 41666 backedges. 0 proven. 41616 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-16 22:19:59,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:20:40,154 INFO L134 CoverageAnalysis]: Checked inductivity of 41666 backedges. 0 proven. 41616 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-16 22:20:40,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213667034] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:20:40,155 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:20:40,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [207, 207, 207] total 618 [2021-12-16 22:20:40,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458541481] [2021-12-16 22:20:40,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:20:40,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 619 states [2021-12-16 22:20:40,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:20:40,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 619 interpolants. [2021-12-16 22:20:40,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169747, Invalid=212795, Unknown=0, NotChecked=0, Total=382542 [2021-12-16 22:20:40,202 INFO L87 Difference]: Start difference. First operand 976 states and 1090 transitions. Second operand has 619 states, 619 states have (on average 2.0323101777059773) internal successors, (1258), 618 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Killed by 15