./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test2-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash da01f7e29b47732481465e941f69a1c8f9dd5529ae81cb8448eb7568570e2356 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 17:59:50,493 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 17:59:50,501 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 17:59:50,544 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 17:59:50,544 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 17:59:50,545 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 17:59:50,546 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 17:59:50,547 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 17:59:50,555 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 17:59:50,555 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 17:59:50,556 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 17:59:50,558 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 17:59:50,558 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 17:59:50,562 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 17:59:50,564 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 17:59:50,566 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 17:59:50,568 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 17:59:50,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 17:59:50,571 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 17:59:50,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 17:59:50,576 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 17:59:50,577 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 17:59:50,578 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 17:59:50,578 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 17:59:50,580 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 17:59:50,581 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 17:59:50,581 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 17:59:50,582 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 17:59:50,583 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 17:59:50,583 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 17:59:50,583 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 17:59:50,584 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 17:59:50,585 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 17:59:50,586 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 17:59:50,587 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 17:59:50,587 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 17:59:50,587 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 17:59:50,587 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 17:59:50,587 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 17:59:50,588 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 17:59:50,588 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 17:59:50,589 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-18 17:59:50,613 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 17:59:50,613 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 17:59:50,614 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 17:59:50,614 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 17:59:50,615 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 17:59:50,615 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 17:59:50,615 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 17:59:50,615 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 17:59:50,615 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 17:59:50,616 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 17:59:50,616 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 17:59:50,616 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 17:59:50,617 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 17:59:50,617 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 17:59:50,617 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-18 17:59:50,617 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 17:59:50,617 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-18 17:59:50,617 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 17:59:50,617 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-18 17:59:50,618 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 17:59:50,618 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-18 17:59:50,618 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 17:59:50,618 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 17:59:50,618 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 17:59:50,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 17:59:50,618 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 17:59:50,618 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 17:59:50,619 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-18 17:59:50,620 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 17:59:50,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 17:59:50,620 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-18 17:59:50,620 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-18 17:59:50,620 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-18 17:59:50,620 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 17:59:50,620 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da01f7e29b47732481465e941f69a1c8f9dd5529ae81cb8448eb7568570e2356 [2021-12-18 17:59:50,824 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 17:59:50,853 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 17:59:50,855 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 17:59:50,856 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 17:59:50,856 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 17:59:50,857 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test2-2.i [2021-12-18 17:59:50,929 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b653b377d/e5133bde866448d1a9ce251cebf8cf85/FLAGb262e8d92 [2021-12-18 17:59:51,397 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 17:59:51,397 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test2-2.i [2021-12-18 17:59:51,415 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b653b377d/e5133bde866448d1a9ce251cebf8cf85/FLAGb262e8d92 [2021-12-18 17:59:51,430 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b653b377d/e5133bde866448d1a9ce251cebf8cf85 [2021-12-18 17:59:51,433 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 17:59:51,434 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 17:59:51,436 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 17:59:51,436 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 17:59:51,439 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 17:59:51,439 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 05:59:51" (1/1) ... [2021-12-18 17:59:51,440 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e0f116c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:59:51, skipping insertion in model container [2021-12-18 17:59:51,440 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 05:59:51" (1/1) ... [2021-12-18 17:59:51,445 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 17:59:51,486 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 17:59:51,817 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test2-2.i[37019,37032] [2021-12-18 17:59:51,898 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test2-2.i[47352,47365] [2021-12-18 17:59:51,917 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 17:59:51,922 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 17:59:51,939 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test2-2.i[37019,37032] [2021-12-18 17:59:51,984 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test2-2.i[47352,47365] [2021-12-18 17:59:51,991 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 17:59:52,029 INFO L208 MainTranslator]: Completed translation [2021-12-18 17:59:52,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:59:52 WrapperNode [2021-12-18 17:59:52,030 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 17:59:52,031 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 17:59:52,031 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 17:59:52,031 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 17:59:52,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:59:52" (1/1) ... [2021-12-18 17:59:52,060 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:59:52" (1/1) ... [2021-12-18 17:59:52,106 INFO L137 Inliner]: procedures = 208, calls = 286, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1039 [2021-12-18 17:59:52,106 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 17:59:52,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 17:59:52,107 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 17:59:52,107 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 17:59:52,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:59:52" (1/1) ... [2021-12-18 17:59:52,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:59:52" (1/1) ... [2021-12-18 17:59:52,120 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:59:52" (1/1) ... [2021-12-18 17:59:52,121 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:59:52" (1/1) ... [2021-12-18 17:59:52,155 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:59:52" (1/1) ... [2021-12-18 17:59:52,164 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:59:52" (1/1) ... [2021-12-18 17:59:52,178 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:59:52" (1/1) ... [2021-12-18 17:59:52,184 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 17:59:52,185 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 17:59:52,185 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 17:59:52,185 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 17:59:52,194 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:59:52" (1/1) ... [2021-12-18 17:59:52,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 17:59:52,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 17:59:52,233 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) [2021-12-18 17:59:52,267 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 [2021-12-18 17:59:52,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-18 17:59:52,283 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-18 17:59:52,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 17:59:52,299 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-18 17:59:52,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 17:59:52,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 17:59:52,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-18 17:59:52,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-18 17:59:52,300 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-18 17:59:52,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-18 17:59:52,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 17:59:52,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 17:59:52,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-18 17:59:52,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-18 17:59:52,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 17:59:52,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 17:59:52,522 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 17:59:52,523 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 17:59:53,217 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 17:59:53,223 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 17:59:53,223 INFO L301 CfgBuilder]: Removed 63 assume(true) statements. [2021-12-18 17:59:53,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 05:59:53 BoogieIcfgContainer [2021-12-18 17:59:53,225 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 17:59:53,226 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 17:59:53,226 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 17:59:53,229 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 17:59:53,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 05:59:51" (1/3) ... [2021-12-18 17:59:53,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9c5df92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 05:59:53, skipping insertion in model container [2021-12-18 17:59:53,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:59:52" (2/3) ... [2021-12-18 17:59:53,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9c5df92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 05:59:53, skipping insertion in model container [2021-12-18 17:59:53,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 05:59:53" (3/3) ... [2021-12-18 17:59:53,231 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test2-2.i [2021-12-18 17:59:53,234 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 17:59:53,235 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-18 17:59:53,291 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 17:59:53,301 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-18 17:59:53,301 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-18 17:59:53,320 INFO L276 IsEmpty]: Start isEmpty. Operand has 206 states, 193 states have (on average 1.689119170984456) internal successors, (326), 200 states have internal predecessors, (326), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-18 17:59:53,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-18 17:59:53,325 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 17:59:53,326 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 17:59:53,326 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 17:59:53,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 17:59:53,330 INFO L85 PathProgramCache]: Analyzing trace with hash -858859523, now seen corresponding path program 1 times [2021-12-18 17:59:53,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 17:59:53,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98659119] [2021-12-18 17:59:53,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:59:53,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 17:59:53,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 17:59:53,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 17:59:53,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 17:59:53,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98659119] [2021-12-18 17:59:53,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98659119] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 17:59:53,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 17:59:53,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 17:59:53,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984854316] [2021-12-18 17:59:53,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 17:59:53,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-18 17:59:53,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 17:59:53,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-18 17:59:53,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-18 17:59:53,492 INFO L87 Difference]: Start difference. First operand has 206 states, 193 states have (on average 1.689119170984456) internal successors, (326), 200 states have internal predecessors, (326), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 17:59:53,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 17:59:53,538 INFO L93 Difference]: Finished difference Result 410 states and 687 transitions. [2021-12-18 17:59:53,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-18 17:59:53,540 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-18 17:59:53,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 17:59:53,546 INFO L225 Difference]: With dead ends: 410 [2021-12-18 17:59:53,546 INFO L226 Difference]: Without dead ends: 173 [2021-12-18 17:59:53,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-18 17:59:53,552 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 17:59:53,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 17:59:53,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-18 17:59:53,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-12-18 17:59:53,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 161 states have (on average 1.3229813664596273) internal successors, (213), 167 states have internal predecessors, (213), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-18 17:59:53,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 229 transitions. [2021-12-18 17:59:53,589 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 229 transitions. Word has length 9 [2021-12-18 17:59:53,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 17:59:53,589 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 229 transitions. [2021-12-18 17:59:53,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 17:59:53,590 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 229 transitions. [2021-12-18 17:59:53,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-18 17:59:53,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 17:59:53,591 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 17:59:53,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-18 17:59:53,592 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 17:59:53,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 17:59:53,592 INFO L85 PathProgramCache]: Analyzing trace with hash -294026559, now seen corresponding path program 1 times [2021-12-18 17:59:53,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 17:59:53,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818183079] [2021-12-18 17:59:53,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:59:53,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 17:59:53,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 17:59:53,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 17:59:53,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 17:59:53,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818183079] [2021-12-18 17:59:53,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818183079] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 17:59:53,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 17:59:53,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 17:59:53,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330565242] [2021-12-18 17:59:53,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 17:59:53,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 17:59:53,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 17:59:53,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 17:59:53,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 17:59:53,646 INFO L87 Difference]: Start difference. First operand 173 states and 229 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 17:59:53,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 17:59:53,903 INFO L93 Difference]: Finished difference Result 363 states and 489 transitions. [2021-12-18 17:59:53,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 17:59:53,904 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-18 17:59:53,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 17:59:53,905 INFO L225 Difference]: With dead ends: 363 [2021-12-18 17:59:53,905 INFO L226 Difference]: Without dead ends: 284 [2021-12-18 17:59:53,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 17:59:53,907 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 138 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 17:59:53,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 553 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 17:59:53,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-12-18 17:59:53,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 175. [2021-12-18 17:59:53,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 163 states have (on average 1.3190184049079754) internal successors, (215), 169 states have internal predecessors, (215), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-18 17:59:53,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 231 transitions. [2021-12-18 17:59:53,918 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 231 transitions. Word has length 44 [2021-12-18 17:59:53,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 17:59:53,918 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 231 transitions. [2021-12-18 17:59:53,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 17:59:53,918 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 231 transitions. [2021-12-18 17:59:53,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-18 17:59:53,920 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 17:59:53,920 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 17:59:53,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-18 17:59:53,921 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 17:59:53,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 17:59:53,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1509402797, now seen corresponding path program 1 times [2021-12-18 17:59:53,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 17:59:53,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584128116] [2021-12-18 17:59:53,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:59:53,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 17:59:54,025 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 17:59:54,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1720284697] [2021-12-18 17:59:54,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:59:54,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:59:54,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 17:59:54,044 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) [2021-12-18 17:59:54,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-18 17:59:54,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 17:59:54,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 1638 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 17:59:54,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 17:59:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 17:59:54,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 17:59:54,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 17:59:54,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584128116] [2021-12-18 17:59:54,650 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 17:59:54,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720284697] [2021-12-18 17:59:54,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720284697] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 17:59:54,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 17:59:54,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 17:59:54,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936230864] [2021-12-18 17:59:54,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 17:59:54,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 17:59:54,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 17:59:54,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 17:59:54,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 17:59:54,652 INFO L87 Difference]: Start difference. First operand 175 states and 231 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 17:59:54,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 17:59:54,698 INFO L93 Difference]: Finished difference Result 367 states and 489 transitions. [2021-12-18 17:59:54,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 17:59:54,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-18 17:59:54,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 17:59:54,699 INFO L225 Difference]: With dead ends: 367 [2021-12-18 17:59:54,699 INFO L226 Difference]: Without dead ends: 196 [2021-12-18 17:59:54,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 17:59:54,701 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 9 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 17:59:54,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 403 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 17:59:54,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-12-18 17:59:54,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2021-12-18 17:59:54,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 183 states have (on average 1.284153005464481) internal successors, (235), 189 states have internal predecessors, (235), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-18 17:59:54,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 251 transitions. [2021-12-18 17:59:54,708 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 251 transitions. Word has length 96 [2021-12-18 17:59:54,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 17:59:54,708 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 251 transitions. [2021-12-18 17:59:54,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 17:59:54,708 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 251 transitions. [2021-12-18 17:59:54,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-18 17:59:54,710 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 17:59:54,710 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 17:59:54,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-18 17:59:54,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:59:54,932 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 17:59:54,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 17:59:54,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1482337195, now seen corresponding path program 1 times [2021-12-18 17:59:54,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 17:59:54,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551129432] [2021-12-18 17:59:54,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:59:54,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 17:59:55,057 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 17:59:55,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [63434786] [2021-12-18 17:59:55,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:59:55,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:59:55,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 17:59:55,059 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) [2021-12-18 17:59:55,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-18 17:59:55,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 17:59:55,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 1640 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 17:59:55,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 17:59:55,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 17:59:55,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 17:59:55,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 17:59:55,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551129432] [2021-12-18 17:59:55,749 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 17:59:55,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63434786] [2021-12-18 17:59:55,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63434786] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 17:59:55,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 17:59:55,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 17:59:55,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144453469] [2021-12-18 17:59:55,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 17:59:55,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 17:59:55,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 17:59:55,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 17:59:55,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 17:59:55,752 INFO L87 Difference]: Start difference. First operand 195 states and 251 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 17:59:55,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 17:59:55,802 INFO L93 Difference]: Finished difference Result 294 states and 388 transitions. [2021-12-18 17:59:55,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 17:59:55,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-18 17:59:55,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 17:59:55,803 INFO L225 Difference]: With dead ends: 294 [2021-12-18 17:59:55,804 INFO L226 Difference]: Without dead ends: 216 [2021-12-18 17:59:55,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 17:59:55,805 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 8 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 17:59:55,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 405 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 17:59:55,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-12-18 17:59:55,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2021-12-18 17:59:55,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 203 states have (on average 1.2561576354679802) internal successors, (255), 209 states have internal predecessors, (255), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-18 17:59:55,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 271 transitions. [2021-12-18 17:59:55,812 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 271 transitions. Word has length 96 [2021-12-18 17:59:55,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 17:59:55,813 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 271 transitions. [2021-12-18 17:59:55,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 17:59:55,813 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 271 transitions. [2021-12-18 17:59:55,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-18 17:59:55,815 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 17:59:55,816 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 17:59:55,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-18 17:59:56,035 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,SelfDestructingSolverStorable3 [2021-12-18 17:59:56,036 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 17:59:56,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 17:59:56,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1801512851, now seen corresponding path program 1 times [2021-12-18 17:59:56,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 17:59:56,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186188587] [2021-12-18 17:59:56,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:59:56,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 17:59:56,108 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 17:59:56,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [581638836] [2021-12-18 17:59:56,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:59:56,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:59:56,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 17:59:56,110 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) [2021-12-18 17:59:56,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-18 17:59:56,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 17:59:56,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 1642 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 17:59:56,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 17:59:56,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 17:59:56,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 17:59:56,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 17:59:56,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186188587] [2021-12-18 17:59:56,844 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 17:59:56,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581638836] [2021-12-18 17:59:56,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581638836] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 17:59:56,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 17:59:56,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 17:59:56,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783373808] [2021-12-18 17:59:56,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 17:59:56,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 17:59:56,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 17:59:56,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 17:59:56,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 17:59:56,846 INFO L87 Difference]: Start difference. First operand 215 states and 271 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 17:59:56,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 17:59:56,893 INFO L93 Difference]: Finished difference Result 418 states and 530 transitions. [2021-12-18 17:59:56,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 17:59:56,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-18 17:59:56,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 17:59:56,895 INFO L225 Difference]: With dead ends: 418 [2021-12-18 17:59:56,895 INFO L226 Difference]: Without dead ends: 207 [2021-12-18 17:59:56,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 17:59:56,896 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 192 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 17:59:56,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 431 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 17:59:56,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-12-18 17:59:56,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 201. [2021-12-18 17:59:56,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 189 states have (on average 1.2380952380952381) internal successors, (234), 195 states have internal predecessors, (234), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-18 17:59:56,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 250 transitions. [2021-12-18 17:59:56,902 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 250 transitions. Word has length 96 [2021-12-18 17:59:56,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 17:59:56,903 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 250 transitions. [2021-12-18 17:59:56,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 17:59:56,903 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 250 transitions. [2021-12-18 17:59:56,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-18 17:59:56,904 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 17:59:56,904 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 17:59:56,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-18 17:59:57,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:59:57,119 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 17:59:57,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 17:59:57,120 INFO L85 PathProgramCache]: Analyzing trace with hash 432355323, now seen corresponding path program 1 times [2021-12-18 17:59:57,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 17:59:57,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803884423] [2021-12-18 17:59:57,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:59:57,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 17:59:57,185 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 17:59:57,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [467664143] [2021-12-18 17:59:57,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:59:57,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:59:57,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 17:59:57,187 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) [2021-12-18 17:59:57,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-18 17:59:57,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 17:59:57,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 1628 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 17:59:57,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 17:59:57,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 17:59:57,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 17:59:57,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 17:59:57,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803884423] [2021-12-18 17:59:57,915 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 17:59:57,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467664143] [2021-12-18 17:59:57,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467664143] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 17:59:57,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 17:59:57,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 17:59:57,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116923645] [2021-12-18 17:59:57,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 17:59:57,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 17:59:57,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 17:59:57,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 17:59:57,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 17:59:57,917 INFO L87 Difference]: Start difference. First operand 201 states and 250 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 17:59:57,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 17:59:57,978 INFO L93 Difference]: Finished difference Result 291 states and 368 transitions. [2021-12-18 17:59:57,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 17:59:57,978 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-18 17:59:57,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 17:59:57,979 INFO L225 Difference]: With dead ends: 291 [2021-12-18 17:59:57,979 INFO L226 Difference]: Without dead ends: 193 [2021-12-18 17:59:57,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 17:59:57,980 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 80 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 17:59:57,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 571 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 17:59:57,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-12-18 17:59:57,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 187. [2021-12-18 17:59:57,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 175 states have (on average 1.217142857142857) internal successors, (213), 181 states have internal predecessors, (213), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-18 17:59:57,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 229 transitions. [2021-12-18 17:59:57,987 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 229 transitions. Word has length 96 [2021-12-18 17:59:57,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 17:59:57,987 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 229 transitions. [2021-12-18 17:59:57,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 17:59:57,988 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 229 transitions. [2021-12-18 17:59:57,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-18 17:59:57,988 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 17:59:57,988 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 17:59:58,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-18 17:59:58,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:59:58,223 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 17:59:58,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 17:59:58,223 INFO L85 PathProgramCache]: Analyzing trace with hash -725253137, now seen corresponding path program 1 times [2021-12-18 17:59:58,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 17:59:58,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155466191] [2021-12-18 17:59:58,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:59:58,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 17:59:58,294 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 17:59:58,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [733984975] [2021-12-18 17:59:58,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:59:58,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:59:58,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 17:59:58,296 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) [2021-12-18 17:59:58,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-18 17:59:58,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 17:59:58,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 1616 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 17:59:58,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 17:59:59,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 17:59:59,200 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 17:59:59,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 17:59:59,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155466191] [2021-12-18 17:59:59,200 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 17:59:59,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733984975] [2021-12-18 17:59:59,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733984975] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 17:59:59,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 17:59:59,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 17:59:59,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136223481] [2021-12-18 17:59:59,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 17:59:59,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 17:59:59,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 17:59:59,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 17:59:59,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 17:59:59,202 INFO L87 Difference]: Start difference. First operand 187 states and 229 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 17:59:59,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 17:59:59,241 INFO L93 Difference]: Finished difference Result 476 states and 582 transitions. [2021-12-18 17:59:59,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 17:59:59,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-18 17:59:59,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 17:59:59,243 INFO L225 Difference]: With dead ends: 476 [2021-12-18 17:59:59,243 INFO L226 Difference]: Without dead ends: 293 [2021-12-18 17:59:59,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 17:59:59,244 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 75 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 17:59:59,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 456 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 17:59:59,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-12-18 17:59:59,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 291. [2021-12-18 17:59:59,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 274 states have (on average 1.197080291970803) internal successors, (328), 285 states have internal predecessors, (328), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-18 17:59:59,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 354 transitions. [2021-12-18 17:59:59,251 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 354 transitions. Word has length 96 [2021-12-18 17:59:59,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 17:59:59,251 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 354 transitions. [2021-12-18 17:59:59,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 17:59:59,252 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 354 transitions. [2021-12-18 17:59:59,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-18 17:59:59,252 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 17:59:59,253 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 17:59:59,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-18 17:59:59,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:59:59,474 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 17:59:59,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 17:59:59,475 INFO L85 PathProgramCache]: Analyzing trace with hash 2014363869, now seen corresponding path program 1 times [2021-12-18 17:59:59,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 17:59:59,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959022915] [2021-12-18 17:59:59,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:59:59,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 17:59:59,506 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 17:59:59,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1813522964] [2021-12-18 17:59:59,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:59:59,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:59:59,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 17:59:59,521 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) [2021-12-18 17:59:59,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-18 18:00:00,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:00:00,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 18:00:00,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:00:00,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 18:00:00,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 18:00:00,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:00:00,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959022915] [2021-12-18 18:00:00,291 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:00:00,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813522964] [2021-12-18 18:00:00,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813522964] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 18:00:00,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 18:00:00,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 18:00:00,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506172484] [2021-12-18 18:00:00,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 18:00:00,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 18:00:00,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:00:00,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 18:00:00,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 18:00:00,293 INFO L87 Difference]: Start difference. First operand 291 states and 354 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 18:00:00,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:00:00,420 INFO L93 Difference]: Finished difference Result 474 states and 579 transitions. [2021-12-18 18:00:00,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 18:00:00,420 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 111 [2021-12-18 18:00:00,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:00:00,422 INFO L225 Difference]: With dead ends: 474 [2021-12-18 18:00:00,422 INFO L226 Difference]: Without dead ends: 231 [2021-12-18 18:00:00,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 18:00:00,423 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 274 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 18:00:00,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 302 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 18:00:00,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-12-18 18:00:00,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2021-12-18 18:00:00,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 219 states have (on average 1.187214611872146) internal successors, (260), 225 states have internal predecessors, (260), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-18 18:00:00,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 276 transitions. [2021-12-18 18:00:00,429 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 276 transitions. Word has length 111 [2021-12-18 18:00:00,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:00:00,430 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 276 transitions. [2021-12-18 18:00:00,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 18:00:00,430 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 276 transitions. [2021-12-18 18:00:00,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-18 18:00:00,431 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:00:00,431 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:00:00,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-18 18:00:00,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:00:00,652 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:00:00,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:00:00,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1259218067, now seen corresponding path program 1 times [2021-12-18 18:00:00,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:00:00,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597270075] [2021-12-18 18:00:00,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:00:00,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:00:00,690 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:00:00,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2103406667] [2021-12-18 18:00:00,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:00:00,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:00:00,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:00:00,692 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) [2021-12-18 18:00:00,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-18 18:00:01,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:00:01,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 18:00:01,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:00:01,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 18:00:01,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 18:00:01,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:00:01,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597270075] [2021-12-18 18:00:01,509 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:00:01,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103406667] [2021-12-18 18:00:01,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103406667] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 18:00:01,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 18:00:01,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 18:00:01,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661031218] [2021-12-18 18:00:01,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 18:00:01,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 18:00:01,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:00:01,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 18:00:01,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 18:00:01,511 INFO L87 Difference]: Start difference. First operand 231 states and 276 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 18:00:01,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:00:01,533 INFO L93 Difference]: Finished difference Result 414 states and 501 transitions. [2021-12-18 18:00:01,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 18:00:01,534 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 118 [2021-12-18 18:00:01,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:00:01,535 INFO L225 Difference]: With dead ends: 414 [2021-12-18 18:00:01,535 INFO L226 Difference]: Without dead ends: 234 [2021-12-18 18:00:01,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 18:00:01,536 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 2 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 18:00:01,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 629 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 18:00:01,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-12-18 18:00:01,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2021-12-18 18:00:01,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 221 states have (on average 1.1900452488687783) internal successors, (263), 228 states have internal predecessors, (263), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2021-12-18 18:00:01,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 280 transitions. [2021-12-18 18:00:01,543 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 280 transitions. Word has length 118 [2021-12-18 18:00:01,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:00:01,543 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 280 transitions. [2021-12-18 18:00:01,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 18:00:01,544 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 280 transitions. [2021-12-18 18:00:01,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-18 18:00:01,544 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:00:01,545 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:00:01,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-18 18:00:01,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:00:01,763 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:00:01,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:00:01,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1061160779, now seen corresponding path program 1 times [2021-12-18 18:00:01,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:00:01,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399925291] [2021-12-18 18:00:01,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:00:01,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:00:01,807 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:00:01,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [706926166] [2021-12-18 18:00:01,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:00:01,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:00:01,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:00:01,827 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) [2021-12-18 18:00:01,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-18 18:00:03,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:00:03,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 808 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-18 18:00:03,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:00:03,798 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 18:00:03,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 18:00:04,001 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 18:00:04,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:00:04,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399925291] [2021-12-18 18:00:04,002 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:00:04,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706926166] [2021-12-18 18:00:04,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706926166] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 18:00:04,002 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 18:00:04,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-18 18:00:04,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652389670] [2021-12-18 18:00:04,002 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 18:00:04,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 18:00:04,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:00:04,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 18:00:04,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-18 18:00:04,003 INFO L87 Difference]: Start difference. First operand 234 states and 280 transitions. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 18:00:04,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:00:04,090 INFO L93 Difference]: Finished difference Result 428 states and 522 transitions. [2021-12-18 18:00:04,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 18:00:04,091 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 120 [2021-12-18 18:00:04,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:00:04,092 INFO L225 Difference]: With dead ends: 428 [2021-12-18 18:00:04,092 INFO L226 Difference]: Without dead ends: 245 [2021-12-18 18:00:04,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-12-18 18:00:04,093 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 18 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 18:00:04,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 839 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 18:00:04,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-12-18 18:00:04,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 243. [2021-12-18 18:00:04,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 229 states have (on average 1.2096069868995634) internal successors, (277), 236 states have internal predecessors, (277), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2021-12-18 18:00:04,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 294 transitions. [2021-12-18 18:00:04,100 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 294 transitions. Word has length 120 [2021-12-18 18:00:04,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:00:04,100 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 294 transitions. [2021-12-18 18:00:04,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 18:00:04,100 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 294 transitions. [2021-12-18 18:00:04,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-18 18:00:04,101 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:00:04,101 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:00:04,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-18 18:00:04,321 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,SelfDestructingSolverStorable9 [2021-12-18 18:00:04,322 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:00:04,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:00:04,322 INFO L85 PathProgramCache]: Analyzing trace with hash -683453741, now seen corresponding path program 2 times [2021-12-18 18:00:04,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:00:04,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548381154] [2021-12-18 18:00:04,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:00:04,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:00:04,366 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:00:04,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [871888568] [2021-12-18 18:00:04,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 18:00:04,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:00:04,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:00:04,384 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) [2021-12-18 18:00:04,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-18 18:00:05,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 18:00:05,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 18:00:05,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 868 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-18 18:00:05,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:00:05,317 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 18:00:05,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 18:00:05,826 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 18:00:05,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:00:05,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548381154] [2021-12-18 18:00:05,827 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:00:05,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871888568] [2021-12-18 18:00:05,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871888568] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 18:00:05,827 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 18:00:05,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-12-18 18:00:05,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303574287] [2021-12-18 18:00:05,828 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 18:00:05,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-18 18:00:05,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:00:05,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-18 18:00:05,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-12-18 18:00:05,829 INFO L87 Difference]: Start difference. First operand 243 states and 294 transitions. Second operand has 15 states, 15 states have (on average 8.8) internal successors, (132), 15 states have internal predecessors, (132), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 18:00:06,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:00:06,748 INFO L93 Difference]: Finished difference Result 448 states and 552 transitions. [2021-12-18 18:00:06,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-18 18:00:06,749 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 8.8) internal successors, (132), 15 states have internal predecessors, (132), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 124 [2021-12-18 18:00:06,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:00:06,751 INFO L225 Difference]: With dead ends: 448 [2021-12-18 18:00:06,751 INFO L226 Difference]: Without dead ends: 256 [2021-12-18 18:00:06,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=234, Invalid=468, Unknown=0, NotChecked=0, Total=702 [2021-12-18 18:00:06,752 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 60 mSDsluCounter, 1651 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1864 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 18:00:06,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 1864 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 18:00:06,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-12-18 18:00:06,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 252. [2021-12-18 18:00:06,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 238 states have (on average 1.2016806722689075) internal successors, (286), 245 states have internal predecessors, (286), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2021-12-18 18:00:06,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 303 transitions. [2021-12-18 18:00:06,761 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 303 transitions. Word has length 124 [2021-12-18 18:00:06,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:00:06,761 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 303 transitions. [2021-12-18 18:00:06,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.8) internal successors, (132), 15 states have internal predecessors, (132), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 18:00:06,762 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 303 transitions. [2021-12-18 18:00:06,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-18 18:00:06,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:00:06,763 INFO L514 BasicCegarLoop]: trace histogram [12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:00:06,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-18 18:00:06,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:00:06,980 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:00:06,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:00:06,980 INFO L85 PathProgramCache]: Analyzing trace with hash 2031107283, now seen corresponding path program 3 times [2021-12-18 18:00:06,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:00:06,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449598178] [2021-12-18 18:00:06,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:00:06,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:00:07,045 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:00:07,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1217150496] [2021-12-18 18:00:07,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 18:00:07,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:00:07,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:00:07,068 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) [2021-12-18 18:00:07,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-18 18:00:52,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-18 18:00:52,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 18:00:52,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 808 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 18:00:52,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:00:53,053 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-18 18:00:53,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 18:00:53,267 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-18 18:00:53,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:00:53,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449598178] [2021-12-18 18:00:53,268 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:00:53,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217150496] [2021-12-18 18:00:53,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217150496] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 18:00:53,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 18:00:53,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-18 18:00:53,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065772851] [2021-12-18 18:00:53,268 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 18:00:53,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 18:00:53,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:00:53,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 18:00:53,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-18 18:00:53,269 INFO L87 Difference]: Start difference. First operand 252 states and 303 transitions. Second operand has 10 states, 10 states have (on average 12.2) internal successors, (122), 10 states have internal predecessors, (122), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 18:00:53,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:00:53,432 INFO L93 Difference]: Finished difference Result 443 states and 538 transitions. [2021-12-18 18:00:53,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 18:00:53,432 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.2) internal successors, (122), 10 states have internal predecessors, (122), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 130 [2021-12-18 18:00:53,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:00:53,435 INFO L225 Difference]: With dead ends: 443 [2021-12-18 18:00:53,435 INFO L226 Difference]: Without dead ends: 259 [2021-12-18 18:00:53,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-12-18 18:00:53,436 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 42 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 18:00:53,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 842 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 18:00:53,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-12-18 18:00:53,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 253. [2021-12-18 18:00:53,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 239 states have (on average 1.205020920502092) internal successors, (288), 246 states have internal predecessors, (288), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2021-12-18 18:00:53,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 305 transitions. [2021-12-18 18:00:53,444 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 305 transitions. Word has length 130 [2021-12-18 18:00:53,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:00:53,444 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 305 transitions. [2021-12-18 18:00:53,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.2) internal successors, (122), 10 states have internal predecessors, (122), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 18:00:53,445 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 305 transitions. [2021-12-18 18:00:53,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-18 18:00:53,445 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:00:53,446 INFO L514 BasicCegarLoop]: trace histogram [16, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:00:53,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-18 18:00:53,671 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,SelfDestructingSolverStorable11 [2021-12-18 18:00:53,671 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:00:53,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:00:53,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1395347117, now seen corresponding path program 4 times [2021-12-18 18:00:53,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:00:53,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942418292] [2021-12-18 18:00:53,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:00:53,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:00:53,724 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:00:53,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [717371069] [2021-12-18 18:00:53,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 18:00:53,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:00:53,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:00:53,726 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) [2021-12-18 18:00:53,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-18 18:00:55,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 18:00:55,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 18:00:55,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 1018 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-18 18:00:55,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:00:55,490 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 40 proven. 102 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-18 18:00:55,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 18:00:55,894 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 81 proven. 21 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-18 18:00:55,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:00:55,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942418292] [2021-12-18 18:00:55,894 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:00:55,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717371069] [2021-12-18 18:00:55,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717371069] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 18:00:55,894 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 18:00:55,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-12-18 18:00:55,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851122051] [2021-12-18 18:00:55,894 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 18:00:55,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-18 18:00:55,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:00:55,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-18 18:00:55,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-12-18 18:00:55,896 INFO L87 Difference]: Start difference. First operand 253 states and 305 transitions. Second operand has 22 states, 22 states have (on average 6.818181818181818) internal successors, (150), 22 states have internal predecessors, (150), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 18:00:58,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:00:58,421 INFO L93 Difference]: Finished difference Result 497 states and 605 transitions. [2021-12-18 18:00:58,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-18 18:00:58,422 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.818181818181818) internal successors, (150), 22 states have internal predecessors, (150), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 134 [2021-12-18 18:00:58,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:00:58,423 INFO L225 Difference]: With dead ends: 497 [2021-12-18 18:00:58,423 INFO L226 Difference]: Without dead ends: 249 [2021-12-18 18:00:58,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=418, Invalid=1064, Unknown=0, NotChecked=0, Total=1482 [2021-12-18 18:00:58,425 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 288 mSDsluCounter, 1697 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 1886 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 18:00:58,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 1886 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 18:00:58,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-12-18 18:00:58,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 243. [2021-12-18 18:00:58,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 229 states have (on average 1.1965065502183405) internal successors, (274), 236 states have internal predecessors, (274), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2021-12-18 18:00:58,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 291 transitions. [2021-12-18 18:00:58,431 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 291 transitions. Word has length 134 [2021-12-18 18:00:58,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:00:58,431 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 291 transitions. [2021-12-18 18:00:58,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.818181818181818) internal successors, (150), 22 states have internal predecessors, (150), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 18:00:58,432 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 291 transitions. [2021-12-18 18:00:58,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-18 18:00:58,432 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:00:58,433 INFO L514 BasicCegarLoop]: trace histogram [24, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:00:58,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-18 18:00:58,655 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,SelfDestructingSolverStorable12 [2021-12-18 18:00:58,655 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:00:58,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:00:58,655 INFO L85 PathProgramCache]: Analyzing trace with hash 479386195, now seen corresponding path program 5 times [2021-12-18 18:00:58,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:00:58,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267107133] [2021-12-18 18:00:58,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:00:58,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:00:58,700 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:00:58,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1100144476] [2021-12-18 18:00:58,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 18:00:58,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:00:58,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:00:58,702 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) [2021-12-18 18:00:58,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process Killed by 15