./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex5.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows 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/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex5.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-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 ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 1ab1611c68b20ff5721c195b0d2c7506cb1678fd2a0003f8a2214f630d652abe --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 09:01:21,070 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 09:01:21,072 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 09:01:21,092 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 09:01:21,094 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 09:01:21,095 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 09:01:21,097 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 09:01:21,099 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 09:01:21,101 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 09:01:21,102 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 09:01:21,103 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 09:01:21,104 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 09:01:21,105 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 09:01:21,109 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 09:01:21,110 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 09:01:21,116 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 09:01:21,118 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 09:01:21,120 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 09:01:21,121 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 09:01:21,125 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 09:01:21,132 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 09:01:21,133 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 09:01:21,134 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 09:01:21,134 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 09:01:21,145 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 09:01:21,145 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 09:01:21,148 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 09:01:21,149 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 09:01:21,149 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 09:01:21,150 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 09:01:21,150 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 09:01:21,151 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 09:01:21,151 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 09:01:21,152 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 09:01:21,152 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 09:01:21,152 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 09:01:21,153 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 09:01:21,153 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 09:01:21,153 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 09:01:21,154 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 09:01:21,154 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 09:01:21,159 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2021-12-16 09:01:21,177 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 09:01:21,181 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 09:01:21,181 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 09:01:21,181 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 09:01:21,182 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 09:01:21,182 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 09:01:21,183 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 09:01:21,183 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 09:01:21,183 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 09:01:21,183 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 09:01:21,184 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 09:01:21,184 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 09:01:21,184 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 09:01:21,185 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 09:01:21,185 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 09:01:21,185 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 09:01:21,185 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-12-16 09:01:21,185 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 09:01:21,185 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 09:01:21,186 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 09:01:21,186 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 09:01:21,186 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 09:01:21,186 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 09:01:21,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 09:01:21,187 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 09:01:21,187 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 09:01:21,187 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 09:01:21,187 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 09:01:21,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 09:01:21,187 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 09:01:21,187 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 09:01:21,188 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ab1611c68b20ff5721c195b0d2c7506cb1678fd2a0003f8a2214f630d652abe [2021-12-16 09:01:21,393 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 09:01:21,408 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 09:01:21,410 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 09:01:21,411 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 09:01:21,412 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 09:01:21,412 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex5.c [2021-12-16 09:01:21,462 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/812d78179/bb787181fbf941519f56238bc99e4179/FLAGa31656e32 [2021-12-16 09:01:21,807 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 09:01:21,807 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex5.c [2021-12-16 09:01:21,814 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/812d78179/bb787181fbf941519f56238bc99e4179/FLAGa31656e32 [2021-12-16 09:01:22,259 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/812d78179/bb787181fbf941519f56238bc99e4179 [2021-12-16 09:01:22,261 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 09:01:22,262 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 09:01:22,264 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 09:01:22,264 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 09:01:22,270 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 09:01:22,271 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 09:01:22" (1/1) ... [2021-12-16 09:01:22,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@707ff7a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:01:22, skipping insertion in model container [2021-12-16 09:01:22,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 09:01:22" (1/1) ... [2021-12-16 09:01:22,277 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 09:01:22,288 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 09:01:22,368 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 09:01:22,370 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 09:01:22,378 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 09:01:22,385 INFO L208 MainTranslator]: Completed translation [2021-12-16 09:01:22,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:01:22 WrapperNode [2021-12-16 09:01:22,386 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 09:01:22,387 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 09:01:22,387 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 09:01:22,388 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 09:01:22,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:01:22" (1/1) ... [2021-12-16 09:01:22,396 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:01:22" (1/1) ... [2021-12-16 09:01:22,405 INFO L137 Inliner]: procedures = 5, calls = 5, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 14 [2021-12-16 09:01:22,405 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 09:01:22,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 09:01:22,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 09:01:22,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 09:01:22,411 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:01:22" (1/1) ... [2021-12-16 09:01:22,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:01:22" (1/1) ... [2021-12-16 09:01:22,412 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:01:22" (1/1) ... [2021-12-16 09:01:22,412 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:01:22" (1/1) ... [2021-12-16 09:01:22,413 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:01:22" (1/1) ... [2021-12-16 09:01:22,414 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:01:22" (1/1) ... [2021-12-16 09:01:22,415 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:01:22" (1/1) ... [2021-12-16 09:01:22,415 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 09:01:22,416 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 09:01:22,416 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 09:01:22,416 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 09:01:22,417 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:01:22" (1/1) ... [2021-12-16 09:01:22,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 09:01:22,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:01:22,439 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 09:01:22,448 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 09:01:22,474 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-12-16 09:01:22,474 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-12-16 09:01:22,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 09:01:22,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 09:01:22,510 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 09:01:22,511 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 09:01:22,602 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 09:01:22,610 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 09:01:22,610 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-16 09:01:22,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 09:01:22 BoogieIcfgContainer [2021-12-16 09:01:22,612 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 09:01:22,614 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 09:01:22,614 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 09:01:22,617 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 09:01:22,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 09:01:22" (1/3) ... [2021-12-16 09:01:22,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21c803ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 09:01:22, skipping insertion in model container [2021-12-16 09:01:22,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:01:22" (2/3) ... [2021-12-16 09:01:22,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21c803ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 09:01:22, skipping insertion in model container [2021-12-16 09:01:22,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 09:01:22" (3/3) ... [2021-12-16 09:01:22,619 INFO L111 eAbstractionObserver]: Analyzing ICFG LeeJonesBen-Amram-POPL2001-Ex5.c [2021-12-16 09:01:22,623 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 09:01:22,623 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-12-16 09:01:22,662 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 09:01:22,667 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=FINITE_AUTOMATA, 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 09:01:22,667 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-12-16 09:01:22,696 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 17 states have (on average 1.411764705882353) internal successors, (24), 21 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 09:01:22,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-16 09:01:22,710 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:01:22,711 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 09:01:22,711 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-16 09:01:22,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:01:22,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1484225386, now seen corresponding path program 1 times [2021-12-16 09:01:22,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:01:22,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520435266] [2021-12-16 09:01:22,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:22,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:01:22,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:22,873 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 09:01:22,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:01:22,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520435266] [2021-12-16 09:01:22,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520435266] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 09:01:22,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 09:01:22,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 09:01:22,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817418449] [2021-12-16 09:01:22,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 09:01:22,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 09:01:22,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:01:22,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 09:01:22,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 09:01:22,910 INFO L87 Difference]: Start difference. First operand has 26 states, 17 states have (on average 1.411764705882353) internal successors, (24), 21 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:23,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:01:23,006 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2021-12-16 09:01:23,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 09:01:23,008 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-16 09:01:23,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:01:23,012 INFO L225 Difference]: With dead ends: 45 [2021-12-16 09:01:23,013 INFO L226 Difference]: Without dead ends: 29 [2021-12-16 09:01:23,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 09:01:23,019 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 33 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 09:01:23,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 78 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 09:01:23,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-16 09:01:23,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2021-12-16 09:01:23,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 20 states have internal predecessors, (22), 4 states have call successors, (4), 2 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:23,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-12-16 09:01:23,050 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 8 [2021-12-16 09:01:23,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:01:23,050 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-12-16 09:01:23,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:23,051 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-12-16 09:01:23,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-16 09:01:23,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:01:23,052 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 09:01:23,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 09:01:23,053 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-16 09:01:23,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:01:23,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1484225162, now seen corresponding path program 1 times [2021-12-16 09:01:23,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:01:23,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969153195] [2021-12-16 09:01:23,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:23,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:01:23,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:23,104 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 09:01:23,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:01:23,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969153195] [2021-12-16 09:01:23,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969153195] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 09:01:23,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 09:01:23,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 09:01:23,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662178094] [2021-12-16 09:01:23,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 09:01:23,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 09:01:23,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:01:23,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 09:01:23,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 09:01:23,109 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:23,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:01:23,158 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-12-16 09:01:23,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 09:01:23,160 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-16 09:01:23,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:01:23,162 INFO L225 Difference]: With dead ends: 35 [2021-12-16 09:01:23,162 INFO L226 Difference]: Without dead ends: 34 [2021-12-16 09:01:23,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 09:01:23,164 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 09:01:23,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 36 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 09:01:23,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-16 09:01:23,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2021-12-16 09:01:23,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 23 states have internal predecessors, (27), 4 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:23,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-12-16 09:01:23,182 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 8 [2021-12-16 09:01:23,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:01:23,182 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-12-16 09:01:23,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:23,183 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-12-16 09:01:23,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-16 09:01:23,183 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:01:23,183 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 09:01:23,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 09:01:23,183 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-16 09:01:23,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:01:23,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1233653331, now seen corresponding path program 1 times [2021-12-16 09:01:23,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:01:23,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485866564] [2021-12-16 09:01:23,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:23,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:01:23,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:23,210 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 09:01:23,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:01:23,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485866564] [2021-12-16 09:01:23,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485866564] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 09:01:23,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 09:01:23,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 09:01:23,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774523981] [2021-12-16 09:01:23,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 09:01:23,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 09:01:23,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:01:23,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 09:01:23,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 09:01:23,217 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:23,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:01:23,242 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-12-16 09:01:23,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 09:01:23,243 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-16 09:01:23,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:01:23,243 INFO L225 Difference]: With dead ends: 34 [2021-12-16 09:01:23,243 INFO L226 Difference]: Without dead ends: 33 [2021-12-16 09:01:23,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 09:01:23,244 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 09:01:23,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 48 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 09:01:23,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-16 09:01:23,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2021-12-16 09:01:23,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.380952380952381) internal successors, (29), 25 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:23,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-12-16 09:01:23,249 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 9 [2021-12-16 09:01:23,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:01:23,249 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-12-16 09:01:23,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:23,249 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-12-16 09:01:23,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-16 09:01:23,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:01:23,250 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 09:01:23,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 09:01:23,250 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-16 09:01:23,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:01:23,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1233660282, now seen corresponding path program 1 times [2021-12-16 09:01:23,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:01:23,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492709961] [2021-12-16 09:01:23,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:23,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:01:23,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:23,276 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 09:01:23,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:01:23,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492709961] [2021-12-16 09:01:23,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492709961] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 09:01:23,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 09:01:23,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 09:01:23,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197507671] [2021-12-16 09:01:23,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 09:01:23,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 09:01:23,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:01:23,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 09:01:23,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 09:01:23,278 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:23,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:01:23,300 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-12-16 09:01:23,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 09:01:23,300 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-16 09:01:23,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:01:23,300 INFO L225 Difference]: With dead ends: 33 [2021-12-16 09:01:23,301 INFO L226 Difference]: Without dead ends: 32 [2021-12-16 09:01:23,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 09:01:23,302 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 09:01:23,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 41 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 09:01:23,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-16 09:01:23,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-12-16 09:01:23,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 26 states have internal predecessors, (30), 4 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:23,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-12-16 09:01:23,305 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 9 [2021-12-16 09:01:23,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:01:23,305 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-12-16 09:01:23,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:23,306 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-12-16 09:01:23,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-16 09:01:23,306 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:01:23,306 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 09:01:23,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 09:01:23,306 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-16 09:01:23,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:01:23,307 INFO L85 PathProgramCache]: Analyzing trace with hash -525255530, now seen corresponding path program 1 times [2021-12-16 09:01:23,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:01:23,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857181167] [2021-12-16 09:01:23,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:23,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:01:23,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:23,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:23,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:01:23,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857181167] [2021-12-16 09:01:23,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857181167] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:01:23,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883863381] [2021-12-16 09:01:23,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:23,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:01:23,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:01:23,352 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 09:01:23,353 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 09:01:23,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:23,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 09:01:23,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:01:23,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:23,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 09:01:23,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883863381] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 09:01:23,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 09:01:23,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-12-16 09:01:23,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825479137] [2021-12-16 09:01:23,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 09:01:23,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 09:01:23,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:01:23,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 09:01:23,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-16 09:01:23,479 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:23,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:01:23,543 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-12-16 09:01:23,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 09:01:23,543 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 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 09:01:23,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:01:23,546 INFO L225 Difference]: With dead ends: 44 [2021-12-16 09:01:23,546 INFO L226 Difference]: Without dead ends: 43 [2021-12-16 09:01:23,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-12-16 09:01:23,549 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 21 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 09:01:23,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 46 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 09:01:23,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-16 09:01:23,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2021-12-16 09:01:23,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 29 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:23,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-12-16 09:01:23,578 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 14 [2021-12-16 09:01:23,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:01:23,579 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-12-16 09:01:23,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:23,579 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-12-16 09:01:23,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-16 09:01:23,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:01:23,581 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 09:01:23,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-16 09:01:23,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:01:23,796 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-16 09:01:23,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:01:23,796 INFO L85 PathProgramCache]: Analyzing trace with hash 909324273, now seen corresponding path program 1 times [2021-12-16 09:01:23,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:01:23,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708747102] [2021-12-16 09:01:23,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:23,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:01:23,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:23,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:23,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:01:23,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708747102] [2021-12-16 09:01:23,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708747102] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:01:23,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926896165] [2021-12-16 09:01:23,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:23,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:01:23,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:01:23,840 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 09:01:23,855 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 09:01:23,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:23,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 09:01:23,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:01:23,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:23,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:01:23,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:23,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926896165] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:01:23,982 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:01:23,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-16 09:01:23,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838028155] [2021-12-16 09:01:23,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:01:23,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 09:01:23,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:01:23,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 09:01:23,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-16 09:01:23,984 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:24,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:01:24,342 INFO L93 Difference]: Finished difference Result 87 states and 102 transitions. [2021-12-16 09:01:24,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-16 09:01:24,343 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 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 09:01:24,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:01:24,344 INFO L225 Difference]: With dead ends: 87 [2021-12-16 09:01:24,344 INFO L226 Difference]: Without dead ends: 85 [2021-12-16 09:01:24,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=608, Unknown=0, NotChecked=0, Total=812 [2021-12-16 09:01:24,345 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 71 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 09:01:24,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 57 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 09:01:24,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-16 09:01:24,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 48. [2021-12-16 09:01:24,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 38 states have (on average 1.368421052631579) internal successors, (52), 41 states have internal predecessors, (52), 7 states have call successors, (7), 6 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:24,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2021-12-16 09:01:24,349 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 14 [2021-12-16 09:01:24,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:01:24,350 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2021-12-16 09:01:24,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:24,350 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2021-12-16 09:01:24,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-16 09:01:24,350 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:01:24,350 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 09:01:24,373 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 09:01:24,550 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,SelfDestructingSolverStorable5 [2021-12-16 09:01:24,551 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-16 09:01:24,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:01:24,551 INFO L85 PathProgramCache]: Analyzing trace with hash 909324497, now seen corresponding path program 1 times [2021-12-16 09:01:24,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:01:24,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562519388] [2021-12-16 09:01:24,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:24,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:01:24,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:24,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:24,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:01:24,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562519388] [2021-12-16 09:01:24,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562519388] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:01:24,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824167255] [2021-12-16 09:01:24,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:24,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:01:24,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:01:24,584 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 09:01:24,585 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 09:01:24,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:24,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 09:01:24,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:01:24,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:24,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:01:24,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:24,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824167255] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:01:24,710 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:01:24,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-16 09:01:24,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971897940] [2021-12-16 09:01:24,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:01:24,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 09:01:24,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:01:24,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 09:01:24,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-16 09:01:24,712 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:24,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:01:24,778 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2021-12-16 09:01:24,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 09:01:24,779 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 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 09:01:24,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:01:24,781 INFO L225 Difference]: With dead ends: 50 [2021-12-16 09:01:24,781 INFO L226 Difference]: Without dead ends: 49 [2021-12-16 09:01:24,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-12-16 09:01:24,782 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 46 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 09:01:24,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 36 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 09:01:24,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-16 09:01:24,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 22. [2021-12-16 09:01:24,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 19 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:24,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-12-16 09:01:24,789 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2021-12-16 09:01:24,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:01:24,789 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-12-16 09:01:24,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:24,789 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-12-16 09:01:24,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-16 09:01:24,790 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:01:24,790 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 09:01:24,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-16 09:01:24,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:01:25,000 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-16 09:01:25,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:01:25,000 INFO L85 PathProgramCache]: Analyzing trace with hash 896940851, now seen corresponding path program 1 times [2021-12-16 09:01:25,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:01:25,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531451960] [2021-12-16 09:01:25,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:25,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:01:25,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:25,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:25,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:01:25,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531451960] [2021-12-16 09:01:25,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531451960] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:01:25,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505566040] [2021-12-16 09:01:25,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:25,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:01:25,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:01:25,076 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 09:01:25,077 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 09:01:25,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:25,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 09:01:25,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:01:25,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:25,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:01:25,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:25,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505566040] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:01:25,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:01:25,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-16 09:01:25,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999453527] [2021-12-16 09:01:25,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:01:25,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 09:01:25,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:01:25,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 09:01:25,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-16 09:01:25,172 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:25,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:01:25,225 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2021-12-16 09:01:25,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 09:01:25,226 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-16 09:01:25,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:01:25,226 INFO L225 Difference]: With dead ends: 55 [2021-12-16 09:01:25,226 INFO L226 Difference]: Without dead ends: 54 [2021-12-16 09:01:25,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-12-16 09:01:25,227 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 81 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 09:01:25,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 89 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 09:01:25,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-16 09:01:25,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 40. [2021-12-16 09:01:25,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.21875) internal successors, (39), 34 states have internal predecessors, (39), 6 states have call successors, (6), 5 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:25,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-12-16 09:01:25,240 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 15 [2021-12-16 09:01:25,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:01:25,241 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-12-16 09:01:25,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:25,241 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-12-16 09:01:25,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-16 09:01:25,241 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:01:25,241 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 09:01:25,260 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 09:01:25,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:01:25,455 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-16 09:01:25,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:01:25,456 INFO L85 PathProgramCache]: Analyzing trace with hash 896947802, now seen corresponding path program 1 times [2021-12-16 09:01:25,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:01:25,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102785588] [2021-12-16 09:01:25,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:25,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:01:25,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:25,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:25,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:01:25,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102785588] [2021-12-16 09:01:25,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102785588] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:01:25,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421943344] [2021-12-16 09:01:25,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:25,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:01:25,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:01:25,484 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 09:01:25,490 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 09:01:25,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:25,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 09:01:25,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:01:25,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:25,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 09:01:25,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421943344] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 09:01:25,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 09:01:25,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-12-16 09:01:25,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092230836] [2021-12-16 09:01:25,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 09:01:25,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 09:01:25,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:01:25,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 09:01:25,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-16 09:01:25,549 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 5 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:25,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:01:25,589 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2021-12-16 09:01:25,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 09:01:25,590 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-16 09:01:25,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:01:25,590 INFO L225 Difference]: With dead ends: 51 [2021-12-16 09:01:25,590 INFO L226 Difference]: Without dead ends: 50 [2021-12-16 09:01:25,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-12-16 09:01:25,591 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 12 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 09:01:25,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 52 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 09:01:25,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-16 09:01:25,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2021-12-16 09:01:25,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 36 states have internal predecessors, (43), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:25,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2021-12-16 09:01:25,611 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 15 [2021-12-16 09:01:25,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:01:25,611 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2021-12-16 09:01:25,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:25,611 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2021-12-16 09:01:25,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-16 09:01:25,612 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:01:25,612 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 09:01:25,628 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 09:01:25,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:01:25,823 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-16 09:01:25,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:01:25,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1875718568, now seen corresponding path program 1 times [2021-12-16 09:01:25,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:01:25,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022700662] [2021-12-16 09:01:25,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:25,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:01:25,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:25,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:25,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:01:25,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022700662] [2021-12-16 09:01:25,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022700662] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:01:25,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839917441] [2021-12-16 09:01:25,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:25,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:01:25,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:01:25,869 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 09:01:25,870 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 09:01:25,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:25,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 09:01:25,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:01:25,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:25,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:01:25,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:25,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839917441] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:01:25,965 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:01:25,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-16 09:01:25,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984230401] [2021-12-16 09:01:25,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:01:25,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 09:01:25,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:01:25,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 09:01:25,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-16 09:01:25,978 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:26,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:01:26,147 INFO L93 Difference]: Finished difference Result 87 states and 99 transitions. [2021-12-16 09:01:26,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-16 09:01:26,147 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-16 09:01:26,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:01:26,148 INFO L225 Difference]: With dead ends: 87 [2021-12-16 09:01:26,148 INFO L226 Difference]: Without dead ends: 85 [2021-12-16 09:01:26,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2021-12-16 09:01:26,149 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 69 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 09:01:26,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 117 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 09:01:26,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-16 09:01:26,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2021-12-16 09:01:26,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 56 states have internal predecessors, (68), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:26,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-12-16 09:01:26,155 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 15 [2021-12-16 09:01:26,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:01:26,155 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-12-16 09:01:26,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:26,156 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-12-16 09:01:26,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-16 09:01:26,156 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:01:26,156 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 09:01:26,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-16 09:01:26,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:01:26,371 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-16 09:01:26,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:01:26,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1875711617, now seen corresponding path program 1 times [2021-12-16 09:01:26,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:01:26,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246237602] [2021-12-16 09:01:26,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:26,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:01:26,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:26,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:26,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:01:26,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246237602] [2021-12-16 09:01:26,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246237602] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:01:26,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112931113] [2021-12-16 09:01:26,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:26,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:01:26,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:01:26,400 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 09:01:26,401 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 09:01:26,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:26,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 09:01:26,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:01:26,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:26,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:01:26,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:26,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112931113] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:01:26,492 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:01:26,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-16 09:01:26,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319309813] [2021-12-16 09:01:26,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:01:26,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 09:01:26,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:01:26,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 09:01:26,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-16 09:01:26,495 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:26,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:01:26,672 INFO L93 Difference]: Finished difference Result 102 states and 118 transitions. [2021-12-16 09:01:26,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-16 09:01:26,673 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-16 09:01:26,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:01:26,673 INFO L225 Difference]: With dead ends: 102 [2021-12-16 09:01:26,673 INFO L226 Difference]: Without dead ends: 100 [2021-12-16 09:01:26,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2021-12-16 09:01:26,674 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 131 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 09:01:26,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 56 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 09:01:26,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-16 09:01:26,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 79. [2021-12-16 09:01:26,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 64 states have (on average 1.203125) internal successors, (77), 67 states have internal predecessors, (77), 13 states have call successors, (13), 11 states have call predecessors, (13), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:26,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2021-12-16 09:01:26,681 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 15 [2021-12-16 09:01:26,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:01:26,681 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2021-12-16 09:01:26,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:26,681 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2021-12-16 09:01:26,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-16 09:01:26,682 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:01:26,682 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 09:01:26,707 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 09:01:26,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:01:26,901 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-16 09:01:26,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:01:26,902 INFO L85 PathProgramCache]: Analyzing trace with hash -604655592, now seen corresponding path program 1 times [2021-12-16 09:01:26,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:01:26,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55161569] [2021-12-16 09:01:26,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:26,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:01:26,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:26,945 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:26,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:01:26,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55161569] [2021-12-16 09:01:26,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55161569] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:01:26,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936565276] [2021-12-16 09:01:26,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:26,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:01:26,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:01:26,950 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 09:01:26,951 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 09:01:26,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:26,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 09:01:26,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:01:27,069 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:27,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:01:27,246 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:27,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936565276] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:01:27,247 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:01:27,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2021-12-16 09:01:27,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027167568] [2021-12-16 09:01:27,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:01:27,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-16 09:01:27,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:01:27,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-16 09:01:27,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-12-16 09:01:27,249 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 13 states have internal predecessors, (51), 6 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:27,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:01:27,960 INFO L93 Difference]: Finished difference Result 188 states and 216 transitions. [2021-12-16 09:01:27,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-16 09:01:27,961 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 13 states have internal predecessors, (51), 6 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-16 09:01:27,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:01:27,961 INFO L225 Difference]: With dead ends: 188 [2021-12-16 09:01:27,961 INFO L226 Difference]: Without dead ends: 164 [2021-12-16 09:01:27,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=506, Invalid=2146, Unknown=0, NotChecked=0, Total=2652 [2021-12-16 09:01:27,963 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 330 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 09:01:27,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 135 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 09:01:27,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-16 09:01:27,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 95. [2021-12-16 09:01:27,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 79 states have (on average 1.2151898734177216) internal successors, (96), 80 states have internal predecessors, (96), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:27,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 110 transitions. [2021-12-16 09:01:27,971 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 110 transitions. Word has length 27 [2021-12-16 09:01:27,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:01:27,971 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 110 transitions. [2021-12-16 09:01:27,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 13 states have internal predecessors, (51), 6 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:27,971 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 110 transitions. [2021-12-16 09:01:27,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-16 09:01:27,972 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:01:27,972 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 09:01:27,999 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 09:01:28,179 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,SelfDestructingSolverStorable11 [2021-12-16 09:01:28,179 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-16 09:01:28,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:01:28,180 INFO L85 PathProgramCache]: Analyzing trace with hash -604648641, now seen corresponding path program 1 times [2021-12-16 09:01:28,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:01:28,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683789725] [2021-12-16 09:01:28,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:28,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:01:28,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:28,258 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:28,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:01:28,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683789725] [2021-12-16 09:01:28,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683789725] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:01:28,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383561109] [2021-12-16 09:01:28,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:28,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:01:28,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:01:28,260 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 09:01:28,261 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 09:01:28,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:28,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 09:01:28,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:01:28,348 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:28,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:01:28,477 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:28,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383561109] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:01:28,478 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:01:28,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 21 [2021-12-16 09:01:28,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837591541] [2021-12-16 09:01:28,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:01:28,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-16 09:01:28,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:01:28,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-16 09:01:28,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-12-16 09:01:28,481 INFO L87 Difference]: Start difference. First operand 95 states and 110 transitions. Second operand has 22 states, 19 states have (on average 2.789473684210526) internal successors, (53), 13 states have internal predecessors, (53), 9 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:28,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:01:28,904 INFO L93 Difference]: Finished difference Result 171 states and 194 transitions. [2021-12-16 09:01:28,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-16 09:01:28,911 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.789473684210526) internal successors, (53), 13 states have internal predecessors, (53), 9 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-16 09:01:28,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:01:28,912 INFO L225 Difference]: With dead ends: 171 [2021-12-16 09:01:28,912 INFO L226 Difference]: Without dead ends: 169 [2021-12-16 09:01:28,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=456, Invalid=1896, Unknown=0, NotChecked=0, Total=2352 [2021-12-16 09:01:28,914 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 259 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 09:01:28,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 87 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 09:01:28,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-16 09:01:28,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 139. [2021-12-16 09:01:28,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 116 states have (on average 1.1810344827586208) internal successors, (137), 117 states have internal predecessors, (137), 21 states have call successors, (21), 21 states have call predecessors, (21), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:28,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 158 transitions. [2021-12-16 09:01:28,924 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 158 transitions. Word has length 27 [2021-12-16 09:01:28,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:01:28,925 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 158 transitions. [2021-12-16 09:01:28,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.789473684210526) internal successors, (53), 13 states have internal predecessors, (53), 9 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:28,925 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 158 transitions. [2021-12-16 09:01:28,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-16 09:01:28,926 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:01:28,926 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 09:01:28,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 09:01:29,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-16 09:01:29,144 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-16 09:01:29,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:01:29,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1302475036, now seen corresponding path program 2 times [2021-12-16 09:01:29,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:01:29,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616468306] [2021-12-16 09:01:29,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:29,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:01:29,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:29,214 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:29,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:01:29,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616468306] [2021-12-16 09:01:29,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616468306] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:01:29,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861926841] [2021-12-16 09:01:29,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 09:01:29,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:01:29,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:01:29,225 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 09:01:29,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 09:01:29,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 09:01:29,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 09:01:29,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 09:01:29,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:01:29,298 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:29,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:01:29,406 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:29,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861926841] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:01:29,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:01:29,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2021-12-16 09:01:29,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953199569] [2021-12-16 09:01:29,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:01:29,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 09:01:29,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:01:29,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 09:01:29,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-12-16 09:01:29,409 INFO L87 Difference]: Start difference. First operand 139 states and 158 transitions. Second operand has 20 states, 17 states have (on average 2.588235294117647) internal successors, (44), 12 states have internal predecessors, (44), 8 states have call successors, (8), 8 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:29,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:01:29,826 INFO L93 Difference]: Finished difference Result 235 states and 265 transitions. [2021-12-16 09:01:29,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-16 09:01:29,826 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.588235294117647) internal successors, (44), 12 states have internal predecessors, (44), 8 states have call successors, (8), 8 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-16 09:01:29,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:01:29,827 INFO L225 Difference]: With dead ends: 235 [2021-12-16 09:01:29,827 INFO L226 Difference]: Without dead ends: 233 [2021-12-16 09:01:29,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=437, Invalid=1725, Unknown=0, NotChecked=0, Total=2162 [2021-12-16 09:01:29,829 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 182 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 09:01:29,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 108 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 09:01:29,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-12-16 09:01:29,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 137. [2021-12-16 09:01:29,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 114 states have (on average 1.1842105263157894) internal successors, (135), 115 states have internal predecessors, (135), 21 states have call successors, (21), 21 states have call predecessors, (21), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:29,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 156 transitions. [2021-12-16 09:01:29,841 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 156 transitions. Word has length 27 [2021-12-16 09:01:29,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:01:29,841 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 156 transitions. [2021-12-16 09:01:29,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.588235294117647) internal successors, (44), 12 states have internal predecessors, (44), 8 states have call successors, (8), 8 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:29,841 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 156 transitions. [2021-12-16 09:01:29,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-16 09:01:29,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:01:29,842 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 09:01:29,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 09:01:30,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-16 09:01:30,059 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-16 09:01:30,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:01:30,060 INFO L85 PathProgramCache]: Analyzing trace with hash 867650562, now seen corresponding path program 2 times [2021-12-16 09:01:30,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:01:30,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521228474] [2021-12-16 09:01:30,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:30,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:01:30,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:30,106 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 09:01:30,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:01:30,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521228474] [2021-12-16 09:01:30,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521228474] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:01:30,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894070712] [2021-12-16 09:01:30,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 09:01:30,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:01:30,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:01:30,108 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 09:01:30,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 09:01:30,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 09:01:30,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 09:01:30,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 09:01:30,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:01:30,252 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:30,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:01:30,434 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:30,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894070712] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:01:30,435 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:01:30,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 12] total 27 [2021-12-16 09:01:30,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430370998] [2021-12-16 09:01:30,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:01:30,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-16 09:01:30,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:01:30,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-16 09:01:30,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-12-16 09:01:30,437 INFO L87 Difference]: Start difference. First operand 137 states and 156 transitions. Second operand has 28 states, 25 states have (on average 2.88) internal successors, (72), 16 states have internal predecessors, (72), 13 states have call successors, (14), 13 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:31,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:01:31,641 INFO L93 Difference]: Finished difference Result 537 states and 615 transitions. [2021-12-16 09:01:31,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-16 09:01:31,641 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.88) internal successors, (72), 16 states have internal predecessors, (72), 13 states have call successors, (14), 13 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-16 09:01:31,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:01:31,643 INFO L225 Difference]: With dead ends: 537 [2021-12-16 09:01:31,643 INFO L226 Difference]: Without dead ends: 535 [2021-12-16 09:01:31,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2287 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1240, Invalid=6770, Unknown=0, NotChecked=0, Total=8010 [2021-12-16 09:01:31,647 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 715 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 09:01:31,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [715 Valid, 90 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 09:01:31,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-12-16 09:01:31,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 279. [2021-12-16 09:01:31,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 232 states have (on average 1.1896551724137931) internal successors, (276), 235 states have internal predecessors, (276), 45 states have call successors, (45), 43 states have call predecessors, (45), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:31,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 321 transitions. [2021-12-16 09:01:31,666 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 321 transitions. Word has length 33 [2021-12-16 09:01:31,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:01:31,666 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 321 transitions. [2021-12-16 09:01:31,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.88) internal successors, (72), 16 states have internal predecessors, (72), 13 states have call successors, (14), 13 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:31,666 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 321 transitions. [2021-12-16 09:01:31,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-16 09:01:31,667 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:01:31,667 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 09:01:31,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 09:01:31,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-16 09:01:31,876 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-16 09:01:31,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:01:31,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1634631444, now seen corresponding path program 2 times [2021-12-16 09:01:31,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:01:31,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152651997] [2021-12-16 09:01:31,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:31,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:01:31,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:31,977 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:31,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:01:31,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152651997] [2021-12-16 09:01:31,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152651997] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:01:31,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842242909] [2021-12-16 09:01:31,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 09:01:31,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:01:31,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:01:31,979 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 09:01:31,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 09:01:32,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 09:01:32,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 09:01:32,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 09:01:32,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:01:32,071 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:32,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:01:32,266 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:32,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842242909] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:01:32,266 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:01:32,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2021-12-16 09:01:32,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365050858] [2021-12-16 09:01:32,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:01:32,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-16 09:01:32,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:01:32,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-16 09:01:32,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-12-16 09:01:32,267 INFO L87 Difference]: Start difference. First operand 279 states and 321 transitions. Second operand has 28 states, 25 states have (on average 2.56) internal successors, (64), 16 states have internal predecessors, (64), 12 states have call successors, (12), 12 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:33,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:01:33,129 INFO L93 Difference]: Finished difference Result 794 states and 896 transitions. [2021-12-16 09:01:33,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-12-16 09:01:33,130 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.56) internal successors, (64), 16 states have internal predecessors, (64), 12 states have call successors, (12), 12 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-16 09:01:33,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:01:33,134 INFO L225 Difference]: With dead ends: 794 [2021-12-16 09:01:33,134 INFO L226 Difference]: Without dead ends: 792 [2021-12-16 09:01:33,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2109 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1407, Invalid=5733, Unknown=0, NotChecked=0, Total=7140 [2021-12-16 09:01:33,137 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 598 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 09:01:33,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [598 Valid, 122 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 09:01:33,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2021-12-16 09:01:33,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 329. [2021-12-16 09:01:33,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 273 states have (on average 1.1904761904761905) internal successors, (325), 276 states have internal predecessors, (325), 54 states have call successors, (54), 52 states have call predecessors, (54), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:33,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 379 transitions. [2021-12-16 09:01:33,173 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 379 transitions. Word has length 39 [2021-12-16 09:01:33,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:01:33,174 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 379 transitions. [2021-12-16 09:01:33,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.56) internal successors, (64), 16 states have internal predecessors, (64), 12 states have call successors, (12), 12 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:33,174 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 379 transitions. [2021-12-16 09:01:33,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-16 09:01:33,176 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:01:33,176 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-12-16 09:01:33,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-16 09:01:33,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-16 09:01:33,383 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-16 09:01:33,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:01:33,384 INFO L85 PathProgramCache]: Analyzing trace with hash -600097325, now seen corresponding path program 3 times [2021-12-16 09:01:33,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:01:33,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101179648] [2021-12-16 09:01:33,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:33,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:01:33,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:33,500 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 24 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:33,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:01:33,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101179648] [2021-12-16 09:01:33,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101179648] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:01:33,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893690225] [2021-12-16 09:01:33,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 09:01:33,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:01:33,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:01:33,502 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 09:01:33,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-16 09:01:33,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-16 09:01:33,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 09:01:33,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 09:01:33,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:01:33,652 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 39 proven. 3 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-16 09:01:33,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:01:33,746 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 39 proven. 3 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-16 09:01:33,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893690225] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:01:33,747 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:01:33,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 23 [2021-12-16 09:01:33,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636821858] [2021-12-16 09:01:33,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:01:33,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-16 09:01:33,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:01:33,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-16 09:01:33,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-12-16 09:01:33,749 INFO L87 Difference]: Start difference. First operand 329 states and 379 transitions. Second operand has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 14 states have internal predecessors, (60), 10 states have call successors, (12), 11 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:33,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:01:33,903 INFO L93 Difference]: Finished difference Result 430 states and 500 transitions. [2021-12-16 09:01:33,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-16 09:01:33,904 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 14 states have internal predecessors, (60), 10 states have call successors, (12), 11 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-16 09:01:33,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:01:33,904 INFO L225 Difference]: With dead ends: 430 [2021-12-16 09:01:33,904 INFO L226 Difference]: Without dead ends: 86 [2021-12-16 09:01:33,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=271, Invalid=851, Unknown=0, NotChecked=0, Total=1122 [2021-12-16 09:01:33,906 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 84 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 09:01:33,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 76 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 09:01:33,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-16 09:01:33,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2021-12-16 09:01:33,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 13 states have call successors, (13), 13 states have call predecessors, (13), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:33,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2021-12-16 09:01:33,911 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 51 [2021-12-16 09:01:33,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:01:33,911 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2021-12-16 09:01:33,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 14 states have internal predecessors, (60), 10 states have call successors, (12), 11 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:33,911 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2021-12-16 09:01:33,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-16 09:01:33,912 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:01:33,912 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1] [2021-12-16 09:01:33,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-16 09:01:34,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-16 09:01:34,118 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-16 09:01:34,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:01:34,118 INFO L85 PathProgramCache]: Analyzing trace with hash 2051033654, now seen corresponding path program 2 times [2021-12-16 09:01:34,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:01:34,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111041843] [2021-12-16 09:01:34,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:34,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:01:34,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:34,400 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:34,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:01:34,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111041843] [2021-12-16 09:01:34,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111041843] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:01:34,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254657789] [2021-12-16 09:01:34,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 09:01:34,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:01:34,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:01:34,403 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 09:01:34,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-16 09:01:34,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 09:01:34,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 09:01:34,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-16 09:01:34,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:01:34,562 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:34,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:01:35,134 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:35,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254657789] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:01:35,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:01:35,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 55 [2021-12-16 09:01:35,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389369106] [2021-12-16 09:01:35,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:01:35,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-16 09:01:35,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:01:35,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-16 09:01:35,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=2656, Unknown=0, NotChecked=0, Total=3080 [2021-12-16 09:01:35,137 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand has 56 states, 53 states have (on average 2.5283018867924527) internal successors, (134), 30 states have internal predecessors, (134), 26 states have call successors, (26), 26 states have call predecessors, (26), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:35,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:01:35,827 INFO L93 Difference]: Finished difference Result 168 states and 174 transitions. [2021-12-16 09:01:35,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-16 09:01:35,827 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 53 states have (on average 2.5283018867924527) internal successors, (134), 30 states have internal predecessors, (134), 26 states have call successors, (26), 26 states have call predecessors, (26), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-16 09:01:35,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:01:35,828 INFO L225 Difference]: With dead ends: 168 [2021-12-16 09:01:35,828 INFO L226 Difference]: Without dead ends: 167 [2021-12-16 09:01:35,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2309 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1306, Invalid=7250, Unknown=0, NotChecked=0, Total=8556 [2021-12-16 09:01:35,831 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 285 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 09:01:35,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 182 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 09:01:35,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-12-16 09:01:35,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2021-12-16 09:01:35,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 138 states have (on average 1.0072463768115942) internal successors, (139), 138 states have internal predecessors, (139), 27 states have call successors, (27), 27 states have call predecessors, (27), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:35,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2021-12-16 09:01:35,842 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 81 [2021-12-16 09:01:35,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:01:35,850 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2021-12-16 09:01:35,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 53 states have (on average 2.5283018867924527) internal successors, (134), 30 states have internal predecessors, (134), 26 states have call successors, (26), 26 states have call predecessors, (26), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:35,850 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2021-12-16 09:01:35,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-16 09:01:35,851 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:01:35,851 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 1, 1, 1, 1, 1] [2021-12-16 09:01:35,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-16 09:01:36,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:01:36,052 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-16 09:01:36,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:01:36,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1310081852, now seen corresponding path program 3 times [2021-12-16 09:01:36,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:01:36,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644139620] [2021-12-16 09:01:36,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:36,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:01:36,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:36,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:36,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:01:36,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644139620] [2021-12-16 09:01:36,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644139620] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:01:36,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006194280] [2021-12-16 09:01:36,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 09:01:36,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:01:36,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:01:36,867 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 09:01:36,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-16 09:01:36,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2021-12-16 09:01:36,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 09:01:36,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-16 09:01:36,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:01:37,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:37,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:01:39,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:39,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006194280] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:01:39,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:01:39,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 111 [2021-12-16 09:01:39,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845520550] [2021-12-16 09:01:39,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:01:39,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2021-12-16 09:01:39,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:01:39,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-12-16 09:01:39,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1628, Invalid=10804, Unknown=0, NotChecked=0, Total=12432 [2021-12-16 09:01:39,276 INFO L87 Difference]: Start difference. First operand 166 states and 166 transitions. Second operand has 112 states, 109 states have (on average 2.5137614678899083) internal successors, (274), 58 states have internal predecessors, (274), 54 states have call successors, (54), 54 states have call predecessors, (54), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:41,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:01:41,523 INFO L93 Difference]: Finished difference Result 336 states and 349 transitions. [2021-12-16 09:01:41,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-12-16 09:01:41,524 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 109 states have (on average 2.5137614678899083) internal successors, (274), 58 states have internal predecessors, (274), 54 states have call successors, (54), 54 states have call predecessors, (54), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-12-16 09:01:41,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:01:41,525 INFO L225 Difference]: With dead ends: 336 [2021-12-16 09:01:41,525 INFO L226 Difference]: Without dead ends: 335 [2021-12-16 09:01:41,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10919 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5352, Invalid=30938, Unknown=0, NotChecked=0, Total=36290 [2021-12-16 09:01:41,529 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 882 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 882 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 09:01:41,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [882 Valid, 285 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 09:01:41,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-12-16 09:01:41,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 334. [2021-12-16 09:01:41,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 278 states have (on average 1.0035971223021583) internal successors, (279), 278 states have internal predecessors, (279), 55 states have call successors, (55), 55 states have call predecessors, (55), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:41,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 334 transitions. [2021-12-16 09:01:41,550 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 334 transitions. Word has length 165 [2021-12-16 09:01:41,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:01:41,550 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 334 transitions. [2021-12-16 09:01:41,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 109 states have (on average 2.5137614678899083) internal successors, (274), 58 states have internal predecessors, (274), 54 states have call successors, (54), 54 states have call predecessors, (54), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:41,551 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 334 transitions. [2021-12-16 09:01:41,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2021-12-16 09:01:41,553 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:01:41,553 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 54, 54, 1, 1, 1, 1, 1] [2021-12-16 09:01:41,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-16 09:01:41,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:01:41,767 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-16 09:01:41,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:01:41,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1347688376, now seen corresponding path program 4 times [2021-12-16 09:01:41,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:01:41,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462188063] [2021-12-16 09:01:41,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:41,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:01:41,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:01:44,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8856 backedges. 0 proven. 8856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:44,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:01:44,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462188063] [2021-12-16 09:01:44,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462188063] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:01:44,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904536220] [2021-12-16 09:01:44,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 09:01:44,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:01:44,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:01:44,519 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 09:01:44,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-16 09:01:44,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 09:01:44,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 09:01:44,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 112 conjunts are in the unsatisfiable core [2021-12-16 09:01:44,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:01:45,219 INFO L134 CoverageAnalysis]: Checked inductivity of 8856 backedges. 0 proven. 8856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:45,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:01:51,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8856 backedges. 0 proven. 8856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:01:51,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904536220] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:01:51,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:01:51,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112, 112] total 223 [2021-12-16 09:01:51,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363265747] [2021-12-16 09:01:51,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:01:51,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 224 states [2021-12-16 09:01:51,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:01:51,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 224 interpolants. [2021-12-16 09:01:51,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6388, Invalid=43564, Unknown=0, NotChecked=0, Total=49952 [2021-12-16 09:01:51,235 INFO L87 Difference]: Start difference. First operand 334 states and 334 transitions. Second operand has 224 states, 221 states have (on average 2.506787330316742) internal successors, (554), 114 states have internal predecessors, (554), 110 states have call successors, (110), 110 states have call predecessors, (110), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:59,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:01:59,423 INFO L93 Difference]: Finished difference Result 672 states and 699 transitions. [2021-12-16 09:01:59,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 276 states. [2021-12-16 09:01:59,424 INFO L78 Accepts]: Start accepts. Automaton has has 224 states, 221 states have (on average 2.506787330316742) internal successors, (554), 114 states have internal predecessors, (554), 110 states have call successors, (110), 110 states have call predecessors, (110), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 333 [2021-12-16 09:01:59,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:01:59,426 INFO L225 Difference]: With dead ends: 672 [2021-12-16 09:01:59,427 INFO L226 Difference]: Without dead ends: 671 [2021-12-16 09:01:59,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 939 GetRequests, 554 SyntacticMatches, 0 SemanticMatches, 385 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47249 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=21676, Invalid=127706, Unknown=0, NotChecked=0, Total=149382 [2021-12-16 09:01:59,437 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 2128 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2128 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 09:01:59,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2128 Valid, 561 Invalid, 992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-16 09:01:59,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-12-16 09:01:59,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 670. [2021-12-16 09:01:59,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 558 states have (on average 1.0017921146953406) internal successors, (559), 558 states have internal predecessors, (559), 111 states have call successors, (111), 111 states have call predecessors, (111), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:59,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 670 transitions. [2021-12-16 09:01:59,485 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 670 transitions. Word has length 333 [2021-12-16 09:01:59,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:01:59,485 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 670 transitions. [2021-12-16 09:01:59,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 224 states, 221 states have (on average 2.506787330316742) internal successors, (554), 114 states have internal predecessors, (554), 110 states have call successors, (110), 110 states have call predecessors, (110), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:01:59,486 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 670 transitions. [2021-12-16 09:01:59,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 670 [2021-12-16 09:01:59,536 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:01:59,536 INFO L514 BasicCegarLoop]: trace histogram [111, 111, 111, 111, 110, 110, 1, 1, 1, 1, 1] [2021-12-16 09:01:59,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-16 09:01:59,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:01:59,739 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-16 09:01:59,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:01:59,740 INFO L85 PathProgramCache]: Analyzing trace with hash -2066219424, now seen corresponding path program 5 times [2021-12-16 09:01:59,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:01:59,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257632171] [2021-12-16 09:01:59,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:01:59,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:01:59,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:09,548 INFO L134 CoverageAnalysis]: Checked inductivity of 36520 backedges. 0 proven. 36520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:02:09,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:02:09,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257632171] [2021-12-16 09:02:09,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257632171] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:02:09,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4616495] [2021-12-16 09:02:09,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 09:02:09,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:02:09,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:02:09,550 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 09:02:09,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-16 09:02:10,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 111 check-sat command(s) [2021-12-16 09:02:10,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 09:02:10,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 1563 conjuncts, 224 conjunts are in the unsatisfiable core [2021-12-16 09:02:10,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:02:11,660 INFO L134 CoverageAnalysis]: Checked inductivity of 36520 backedges. 0 proven. 36520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:02:11,660 INFO L328 TraceCheckSpWp]: Computing backward predicates...