./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 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_SAX_test6-2.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 bb48026e7f870ff561a4cdd394c24cb5edb1d0f2fc8e8ef2bffe0b7b8438fda4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-17 15:36:57,746 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-17 15:36:57,750 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-17 15:36:57,789 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-17 15:36:57,789 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-17 15:36:57,792 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-17 15:36:57,793 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-17 15:36:57,796 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-17 15:36:57,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-17 15:36:57,801 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-17 15:36:57,802 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-17 15:36:57,803 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-17 15:36:57,804 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-17 15:36:57,806 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-17 15:36:57,807 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-17 15:36:57,813 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-17 15:36:57,814 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-17 15:36:57,815 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-17 15:36:57,817 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-17 15:36:57,820 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-17 15:36:57,821 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-17 15:36:57,822 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-17 15:36:57,823 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-17 15:36:57,824 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-17 15:36:57,831 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-17 15:36:57,831 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-17 15:36:57,831 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-17 15:36:57,833 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-17 15:36:57,833 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-17 15:36:57,834 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-17 15:36:57,834 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-17 15:36:57,835 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-17 15:36:57,836 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-17 15:36:57,837 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-17 15:36:57,838 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-17 15:36:57,838 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-17 15:36:57,839 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-17 15:36:57,839 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-17 15:36:57,839 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-17 15:36:57,840 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-17 15:36:57,840 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-17 15:36:57,844 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-17 15:36:57,875 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-17 15:36:57,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-17 15:36:57,876 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-17 15:36:57,876 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-17 15:36:57,877 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-17 15:36:57,877 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-17 15:36:57,877 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-17 15:36:57,878 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-17 15:36:57,878 INFO L138 SettingsManager]: * Use SBE=true [2021-11-17 15:36:57,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-17 15:36:57,879 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-17 15:36:57,879 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-17 15:36:57,879 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-17 15:36:57,879 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-17 15:36:57,879 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-17 15:36:57,880 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-17 15:36:57,880 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-17 15:36:57,880 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-17 15:36:57,880 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-17 15:36:57,880 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-17 15:36:57,880 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-17 15:36:57,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-17 15:36:57,881 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-17 15:36:57,881 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-17 15:36:57,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-17 15:36:57,881 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-17 15:36:57,882 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-17 15:36:57,882 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-17 15:36:57,882 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-17 15:36:57,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-17 15:36:57,882 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-17 15:36:57,882 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-17 15:36:57,883 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-17 15:36:57,883 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-17 15:36:57,883 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb48026e7f870ff561a4cdd394c24cb5edb1d0f2fc8e8ef2bffe0b7b8438fda4 [2021-11-17 15:36:58,090 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-17 15:36:58,112 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-17 15:36:58,115 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-17 15:36:58,116 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-17 15:36:58,116 INFO L275 PluginConnector]: CDTParser initialized [2021-11-17 15:36:58,117 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i [2021-11-17 15:36:58,184 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/557fd128c/706de57b1e5d420ba772c843008deddb/FLAG122582ade [2021-11-17 15:36:58,673 INFO L306 CDTParser]: Found 1 translation units. [2021-11-17 15:36:58,673 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-2.i [2021-11-17 15:36:58,695 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/557fd128c/706de57b1e5d420ba772c843008deddb/FLAG122582ade [2021-11-17 15:36:59,145 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/557fd128c/706de57b1e5d420ba772c843008deddb [2021-11-17 15:36:59,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-17 15:36:59,150 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-17 15:36:59,155 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-17 15:36:59,155 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-17 15:36:59,158 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-17 15:36:59,159 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:36:59" (1/1) ... [2021-11-17 15:36:59,160 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6377014a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:59, skipping insertion in model container [2021-11-17 15:36:59,160 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:36:59" (1/1) ... [2021-11-17 15:36:59,166 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-17 15:36:59,212 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-17 15:36:59,682 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_SAX_test6-2.i[44118,44131] [2021-11-17 15:36:59,695 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_SAX_test6-2.i[44660,44673] [2021-11-17 15:36:59,809 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_SAX_test6-2.i[56247,56260] [2021-11-17 15:36:59,818 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_SAX_test6-2.i[56368,56381] [2021-11-17 15:36:59,829 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-17 15:36:59,850 INFO L203 MainTranslator]: Completed pre-run [2021-11-17 15:36:59,884 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_SAX_test6-2.i[44118,44131] [2021-11-17 15:36:59,886 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_SAX_test6-2.i[44660,44673] [2021-11-17 15:36:59,935 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_SAX_test6-2.i[56247,56260] [2021-11-17 15:36:59,944 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_SAX_test6-2.i[56368,56381] [2021-11-17 15:36:59,958 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-17 15:37:00,012 INFO L208 MainTranslator]: Completed translation [2021-11-17 15:37:00,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:00 WrapperNode [2021-11-17 15:37:00,013 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-17 15:37:00,014 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-17 15:37:00,014 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-17 15:37:00,014 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-17 15:37:00,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:00" (1/1) ... [2021-11-17 15:37:00,058 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:00" (1/1) ... [2021-11-17 15:37:00,120 INFO L137 Inliner]: procedures = 282, calls = 347, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 1198 [2021-11-17 15:37:00,120 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-17 15:37:00,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-17 15:37:00,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-17 15:37:00,122 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-17 15:37:00,129 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:00" (1/1) ... [2021-11-17 15:37:00,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:00" (1/1) ... [2021-11-17 15:37:00,140 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:00" (1/1) ... [2021-11-17 15:37:00,141 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:00" (1/1) ... [2021-11-17 15:37:00,183 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:00" (1/1) ... [2021-11-17 15:37:00,207 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:00" (1/1) ... [2021-11-17 15:37:00,212 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:00" (1/1) ... [2021-11-17 15:37:00,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-17 15:37:00,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-17 15:37:00,222 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-17 15:37:00,222 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-17 15:37:00,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:00" (1/1) ... [2021-11-17 15:37:00,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-17 15:37:00,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:37:00,254 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) [2021-11-17 15:37:00,256 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 [2021-11-17 15:37:00,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-17 15:37:00,281 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-17 15:37:00,281 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-17 15:37:00,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-17 15:37:00,281 INFO L130 BoogieDeclarations]: Found specification of procedure alt_bzero [2021-11-17 15:37:00,281 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_bzero [2021-11-17 15:37:00,281 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-17 15:37:00,281 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-17 15:37:00,281 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-17 15:37:00,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-17 15:37:00,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-17 15:37:00,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-17 15:37:00,282 INFO L130 BoogieDeclarations]: Found specification of procedure alt_malloc [2021-11-17 15:37:00,282 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_malloc [2021-11-17 15:37:00,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-17 15:37:00,282 INFO L130 BoogieDeclarations]: Found specification of procedure alt_free [2021-11-17 15:37:00,283 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_free [2021-11-17 15:37:00,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-17 15:37:00,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-17 15:37:00,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-17 15:37:00,504 INFO L236 CfgBuilder]: Building ICFG [2021-11-17 15:37:00,506 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-17 15:37:01,407 INFO L277 CfgBuilder]: Performing block encoding [2021-11-17 15:37:01,419 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-17 15:37:01,420 INFO L301 CfgBuilder]: Removed 72 assume(true) statements. [2021-11-17 15:37:01,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:37:01 BoogieIcfgContainer [2021-11-17 15:37:01,423 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-17 15:37:01,424 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-17 15:37:01,425 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-17 15:37:01,428 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-17 15:37:01,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:36:59" (1/3) ... [2021-11-17 15:37:01,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48ce6d53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:37:01, skipping insertion in model container [2021-11-17 15:37:01,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:00" (2/3) ... [2021-11-17 15:37:01,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48ce6d53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:37:01, skipping insertion in model container [2021-11-17 15:37:01,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:37:01" (3/3) ... [2021-11-17 15:37:01,433 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test6-2.i [2021-11-17 15:37:01,463 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-17 15:37:01,463 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-17 15:37:01,504 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-17 15:37:01,517 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 [2021-11-17 15:37:01,518 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-17 15:37:01,541 INFO L276 IsEmpty]: Start isEmpty. Operand has 258 states, 234 states have (on average 1.6367521367521367) internal successors, (383), 238 states have internal predecessors, (383), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-17 15:37:01,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-17 15:37:01,545 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:37:01,545 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 15:37:01,545 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 15:37:01,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:37:01,549 INFO L85 PathProgramCache]: Analyzing trace with hash -720802776, now seen corresponding path program 1 times [2021-11-17 15:37:01,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:37:01,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036261781] [2021-11-17 15:37:01,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:37:01,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:37:01,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:37:01,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 15:37:01,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:37:01,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036261781] [2021-11-17 15:37:01,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036261781] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 15:37:01,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 15:37:01,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-17 15:37:01,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607311363] [2021-11-17 15:37:01,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:37:01,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-17 15:37:01,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:37:01,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-17 15:37:01,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-17 15:37:01,767 INFO L87 Difference]: Start difference. First operand has 258 states, 234 states have (on average 1.6367521367521367) internal successors, (383), 238 states have internal predecessors, (383), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-11-17 15:37:01,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:37:01,849 INFO L93 Difference]: Finished difference Result 511 states and 836 transitions. [2021-11-17 15:37:01,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-17 15:37:01,851 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2021-11-17 15:37:01,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:37:01,866 INFO L225 Difference]: With dead ends: 511 [2021-11-17 15:37:01,867 INFO L226 Difference]: Without dead ends: 251 [2021-11-17 15:37:01,874 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 [2021-11-17 15:37:01,877 INFO L933 BasicCegarLoop]: 331 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, 331 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 [2021-11-17 15:37:01,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-17 15:37:01,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-11-17 15:37:01,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2021-11-17 15:37:01,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 228 states have (on average 1.3026315789473684) internal successors, (297), 232 states have internal predecessors, (297), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-17 15:37:01,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 327 transitions. [2021-11-17 15:37:01,955 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 327 transitions. Word has length 8 [2021-11-17 15:37:01,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:37:01,955 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 327 transitions. [2021-11-17 15:37:01,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-11-17 15:37:01,956 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 327 transitions. [2021-11-17 15:37:01,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-17 15:37:01,958 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:37:01,958 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 15:37:01,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-17 15:37:01,959 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 15:37:01,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:37:01,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1810590275, now seen corresponding path program 1 times [2021-11-17 15:37:01,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:37:01,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165321454] [2021-11-17 15:37:01,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:37:01,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:37:02,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:37:02,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 15:37:02,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:37:02,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165321454] [2021-11-17 15:37:02,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165321454] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 15:37:02,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 15:37:02,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-17 15:37:02,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929383912] [2021-11-17 15:37:02,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:37:02,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-17 15:37:02,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:37:02,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-17 15:37:02,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-17 15:37:02,083 INFO L87 Difference]: Start difference. First operand 251 states and 327 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-11-17 15:37:02,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:37:02,463 INFO L93 Difference]: Finished difference Result 547 states and 718 transitions. [2021-11-17 15:37:02,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-17 15:37:02,463 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2021-11-17 15:37:02,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:37:02,465 INFO L225 Difference]: With dead ends: 547 [2021-11-17 15:37:02,465 INFO L226 Difference]: Without dead ends: 405 [2021-11-17 15:37:02,466 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 [2021-11-17 15:37:02,467 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 179 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-17 15:37:02,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 880 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-17 15:37:02,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-11-17 15:37:02,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 253. [2021-11-17 15:37:02,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 230 states have (on average 1.3) internal successors, (299), 234 states have internal predecessors, (299), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-17 15:37:02,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 329 transitions. [2021-11-17 15:37:02,494 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 329 transitions. Word has length 10 [2021-11-17 15:37:02,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:37:02,495 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 329 transitions. [2021-11-17 15:37:02,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-11-17 15:37:02,496 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 329 transitions. [2021-11-17 15:37:02,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-17 15:37:02,497 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:37:02,498 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, 1, 1, 1] [2021-11-17 15:37:02,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-17 15:37:02,498 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 15:37:02,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:37:02,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1739977374, now seen corresponding path program 1 times [2021-11-17 15:37:02,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:37:02,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204410791] [2021-11-17 15:37:02,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:37:02,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:37:02,535 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:37:02,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1172121044] [2021-11-17 15:37:02,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:37:02,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:37:02,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:37:02,543 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) [2021-11-17 15:37:02,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-17 15:37:02,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:37:02,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-17 15:37:02,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:37:02,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 15:37:02,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 15:37:02,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:37:02,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204410791] [2021-11-17 15:37:02,826 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:37:02,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172121044] [2021-11-17 15:37:02,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172121044] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 15:37:02,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 15:37:02,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-17 15:37:02,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020928460] [2021-11-17 15:37:02,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:37:02,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-17 15:37:02,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:37:02,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-17 15:37:02,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-17 15:37:02,829 INFO L87 Difference]: Start difference. First operand 253 states and 329 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 15:37:02,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:37:02,892 INFO L93 Difference]: Finished difference Result 523 states and 685 transitions. [2021-11-17 15:37:02,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-17 15:37:02,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-17 15:37:02,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:37:02,894 INFO L225 Difference]: With dead ends: 523 [2021-11-17 15:37:02,894 INFO L226 Difference]: Without dead ends: 274 [2021-11-17 15:37:02,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-17 15:37:02,896 INFO L933 BasicCegarLoop]: 307 mSDtfsCounter, 9 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-17 15:37:02,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 599 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-17 15:37:02,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-17 15:37:02,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 273. [2021-11-17 15:37:02,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 250 states have (on average 1.276) internal successors, (319), 254 states have internal predecessors, (319), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-17 15:37:02,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 349 transitions. [2021-11-17 15:37:02,907 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 349 transitions. Word has length 47 [2021-11-17 15:37:02,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:37:02,907 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 349 transitions. [2021-11-17 15:37:02,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 15:37:02,908 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 349 transitions. [2021-11-17 15:37:02,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-17 15:37:02,909 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:37:02,909 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, 1, 1, 1] [2021-11-17 15:37:02,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-17 15:37:03,134 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 [2021-11-17 15:37:03,135 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 15:37:03,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:37:03,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1599428764, now seen corresponding path program 1 times [2021-11-17 15:37:03,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:37:03,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407132270] [2021-11-17 15:37:03,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:37:03,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:37:03,157 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:37:03,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2041204236] [2021-11-17 15:37:03,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:37:03,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:37:03,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:37:03,161 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) [2021-11-17 15:37:03,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-17 15:37:03,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:37:03,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-17 15:37:03,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:37:03,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 15:37:03,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 15:37:03,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:37:03,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407132270] [2021-11-17 15:37:03,462 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:37:03,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041204236] [2021-11-17 15:37:03,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041204236] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 15:37:03,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 15:37:03,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-17 15:37:03,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651963029] [2021-11-17 15:37:03,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:37:03,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-17 15:37:03,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:37:03,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-17 15:37:03,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-17 15:37:03,464 INFO L87 Difference]: Start difference. First operand 273 states and 349 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 15:37:03,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:37:03,540 INFO L93 Difference]: Finished difference Result 535 states and 687 transitions. [2021-11-17 15:37:03,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-17 15:37:03,541 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-17 15:37:03,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:37:03,542 INFO L225 Difference]: With dead ends: 535 [2021-11-17 15:37:03,543 INFO L226 Difference]: Without dead ends: 266 [2021-11-17 15:37:03,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-17 15:37:03,544 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 264 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-17 15:37:03,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 650 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-17 15:37:03,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-11-17 15:37:03,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 259. [2021-11-17 15:37:03,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 236 states have (on average 1.2627118644067796) internal successors, (298), 240 states have internal predecessors, (298), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-17 15:37:03,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 328 transitions. [2021-11-17 15:37:03,553 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 328 transitions. Word has length 47 [2021-11-17 15:37:03,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:37:03,554 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 328 transitions. [2021-11-17 15:37:03,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 15:37:03,554 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 328 transitions. [2021-11-17 15:37:03,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-17 15:37:03,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:37:03,555 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, 1, 1, 1] [2021-11-17 15:37:03,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-17 15:37:03,763 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 [2021-11-17 15:37:03,764 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 15:37:03,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:37:03,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1265789014, now seen corresponding path program 1 times [2021-11-17 15:37:03,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:37:03,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067174261] [2021-11-17 15:37:03,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:37:03,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:37:03,791 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:37:03,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1537774736] [2021-11-17 15:37:03,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:37:03,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:37:03,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:37:03,798 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) [2021-11-17 15:37:03,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-17 15:37:03,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:37:03,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-17 15:37:03,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:37:04,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 15:37:04,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 15:37:04,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:37:04,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067174261] [2021-11-17 15:37:04,081 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:37:04,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537774736] [2021-11-17 15:37:04,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537774736] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 15:37:04,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 15:37:04,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-17 15:37:04,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632687783] [2021-11-17 15:37:04,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:37:04,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-17 15:37:04,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:37:04,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-17 15:37:04,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-17 15:37:04,083 INFO L87 Difference]: Start difference. First operand 259 states and 328 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 15:37:04,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:37:04,131 INFO L93 Difference]: Finished difference Result 271 states and 340 transitions. [2021-11-17 15:37:04,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-17 15:37:04,131 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-17 15:37:04,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:37:04,133 INFO L225 Difference]: With dead ends: 271 [2021-11-17 15:37:04,133 INFO L226 Difference]: Without dead ends: 269 [2021-11-17 15:37:04,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-17 15:37:04,134 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 13 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1569 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-17 15:37:04,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 1569 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-17 15:37:04,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-11-17 15:37:04,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2021-11-17 15:37:04,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 243 states have (on average 1.2592592592592593) internal successors, (306), 248 states have internal predecessors, (306), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-17 15:37:04,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 338 transitions. [2021-11-17 15:37:04,143 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 338 transitions. Word has length 47 [2021-11-17 15:37:04,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:37:04,143 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 338 transitions. [2021-11-17 15:37:04,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 15:37:04,144 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 338 transitions. [2021-11-17 15:37:04,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-17 15:37:04,145 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:37:04,145 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 15:37:04,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-17 15:37:04,363 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 [2021-11-17 15:37:04,364 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 15:37:04,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:37:04,364 INFO L85 PathProgramCache]: Analyzing trace with hash 2015855482, now seen corresponding path program 1 times [2021-11-17 15:37:04,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:37:04,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892393039] [2021-11-17 15:37:04,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:37:04,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:37:04,379 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:37:04,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1804249361] [2021-11-17 15:37:04,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:37:04,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:37:04,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:37:04,381 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) [2021-11-17 15:37:04,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-17 15:37:04,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:37:04,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-17 15:37:04,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:37:04,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 15:37:04,666 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 15:37:04,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:37:04,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892393039] [2021-11-17 15:37:04,667 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:37:04,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804249361] [2021-11-17 15:37:04,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804249361] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 15:37:04,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 15:37:04,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-17 15:37:04,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834007295] [2021-11-17 15:37:04,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:37:04,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-17 15:37:04,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:37:04,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-17 15:37:04,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-17 15:37:04,670 INFO L87 Difference]: Start difference. First operand 269 states and 338 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 15:37:04,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:37:04,705 INFO L93 Difference]: Finished difference Result 535 states and 674 transitions. [2021-11-17 15:37:04,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-17 15:37:04,712 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-17 15:37:04,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:37:04,713 INFO L225 Difference]: With dead ends: 535 [2021-11-17 15:37:04,713 INFO L226 Difference]: Without dead ends: 270 [2021-11-17 15:37:04,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-17 15:37:04,714 INFO L933 BasicCegarLoop]: 319 mSDtfsCounter, 0 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-17 15:37:04,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 633 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-17 15:37:04,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-11-17 15:37:04,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2021-11-17 15:37:04,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 244 states have (on average 1.2581967213114753) internal successors, (307), 249 states have internal predecessors, (307), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-17 15:37:04,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 339 transitions. [2021-11-17 15:37:04,730 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 339 transitions. Word has length 58 [2021-11-17 15:37:04,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:37:04,730 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 339 transitions. [2021-11-17 15:37:04,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 15:37:04,731 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 339 transitions. [2021-11-17 15:37:04,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-17 15:37:04,731 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:37:04,732 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 15:37:04,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-17 15:37:04,935 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 [2021-11-17 15:37:04,935 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 15:37:04,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:37:04,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1886084804, now seen corresponding path program 1 times [2021-11-17 15:37:04,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:37:04,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602440040] [2021-11-17 15:37:04,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:37:04,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:37:04,951 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:37:04,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [687239079] [2021-11-17 15:37:04,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:37:04,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:37:04,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:37:04,953 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) [2021-11-17 15:37:04,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-17 15:37:05,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:37:05,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-17 15:37:05,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:37:05,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 15:37:05,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 15:37:05,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:37:05,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602440040] [2021-11-17 15:37:05,397 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:37:05,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687239079] [2021-11-17 15:37:05,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687239079] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 15:37:05,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 15:37:05,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-17 15:37:05,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975957804] [2021-11-17 15:37:05,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:37:05,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-17 15:37:05,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:37:05,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-17 15:37:05,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-17 15:37:05,401 INFO L87 Difference]: Start difference. First operand 270 states and 339 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 15:37:05,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:37:05,533 INFO L93 Difference]: Finished difference Result 690 states and 873 transitions. [2021-11-17 15:37:05,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-17 15:37:05,533 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-17 15:37:05,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:37:05,536 INFO L225 Difference]: With dead ends: 690 [2021-11-17 15:37:05,536 INFO L226 Difference]: Without dead ends: 424 [2021-11-17 15:37:05,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-17 15:37:05,537 INFO L933 BasicCegarLoop]: 366 mSDtfsCounter, 143 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-17 15:37:05,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 642 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-17 15:37:05,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-11-17 15:37:05,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 385. [2021-11-17 15:37:05,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 356 states have (on average 1.2556179775280898) internal successors, (447), 361 states have internal predecessors, (447), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-11-17 15:37:05,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 485 transitions. [2021-11-17 15:37:05,553 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 485 transitions. Word has length 58 [2021-11-17 15:37:05,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:37:05,555 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 485 transitions. [2021-11-17 15:37:05,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 15:37:05,556 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 485 transitions. [2021-11-17 15:37:05,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-17 15:37:05,557 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:37:05,557 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] [2021-11-17 15:37:05,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-17 15:37:05,782 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 [2021-11-17 15:37:05,783 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 15:37:05,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:37:05,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1360052348, now seen corresponding path program 1 times [2021-11-17 15:37:05,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:37:05,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048479122] [2021-11-17 15:37:05,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:37:05,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:37:05,798 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:37:05,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [420101440] [2021-11-17 15:37:05,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:37:05,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:37:05,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:37:05,800 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) [2021-11-17 15:37:05,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-17 15:37:05,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:37:05,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-17 15:37:05,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:37:06,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 15:37:06,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-17 15:37:06,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 15:37:06,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:37:06,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048479122] [2021-11-17 15:37:06,321 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:37:06,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420101440] [2021-11-17 15:37:06,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420101440] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-17 15:37:06,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-17 15:37:06,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 9 [2021-11-17 15:37:06,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290437173] [2021-11-17 15:37:06,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:37:06,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-17 15:37:06,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:37:06,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-17 15:37:06,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-17 15:37:06,323 INFO L87 Difference]: Start difference. First operand 385 states and 485 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-17 15:37:06,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:37:06,489 INFO L93 Difference]: Finished difference Result 1424 states and 1846 transitions. [2021-11-17 15:37:06,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-17 15:37:06,489 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 62 [2021-11-17 15:37:06,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:37:06,496 INFO L225 Difference]: With dead ends: 1424 [2021-11-17 15:37:06,496 INFO L226 Difference]: Without dead ends: 1088 [2021-11-17 15:37:06,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-17 15:37:06,498 INFO L933 BasicCegarLoop]: 395 mSDtfsCounter, 1280 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1280 SdHoareTripleChecker+Valid, 1253 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-17 15:37:06,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1280 Valid, 1253 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-17 15:37:06,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-11-17 15:37:06,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 659. [2021-11-17 15:37:06,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 617 states have (on average 1.2690437601296596) internal successors, (783), 623 states have internal predecessors, (783), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (29), 25 states have call predecessors, (29), 28 states have call successors, (29) [2021-11-17 15:37:06,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 840 transitions. [2021-11-17 15:37:06,522 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 840 transitions. Word has length 62 [2021-11-17 15:37:06,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:37:06,523 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 840 transitions. [2021-11-17 15:37:06,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-17 15:37:06,523 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 840 transitions. [2021-11-17 15:37:06,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-17 15:37:06,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:37:06,525 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 15:37:06,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-17 15:37:06,747 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 [2021-11-17 15:37:06,748 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 15:37:06,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:37:06,748 INFO L85 PathProgramCache]: Analyzing trace with hash 643772401, now seen corresponding path program 1 times [2021-11-17 15:37:06,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:37:06,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619076135] [2021-11-17 15:37:06,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:37:06,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:37:06,764 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:37:06,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508438228] [2021-11-17 15:37:06,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:37:06,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:37:06,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:37:06,766 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) [2021-11-17 15:37:06,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-17 15:37:06,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:37:06,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-17 15:37:06,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:37:07,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-17 15:37:07,154 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 15:37:07,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:37:07,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619076135] [2021-11-17 15:37:07,155 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:37:07,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508438228] [2021-11-17 15:37:07,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508438228] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 15:37:07,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 15:37:07,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-17 15:37:07,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282632070] [2021-11-17 15:37:07,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:37:07,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-17 15:37:07,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:37:07,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-17 15:37:07,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-17 15:37:07,157 INFO L87 Difference]: Start difference. First operand 659 states and 840 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-17 15:37:07,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:37:07,260 INFO L93 Difference]: Finished difference Result 1250 states and 1604 transitions. [2021-11-17 15:37:07,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-17 15:37:07,261 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 93 [2021-11-17 15:37:07,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:37:07,264 INFO L225 Difference]: With dead ends: 1250 [2021-11-17 15:37:07,264 INFO L226 Difference]: Without dead ends: 659 [2021-11-17 15:37:07,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-17 15:37:07,266 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 25 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-17 15:37:07,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 1168 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-17 15:37:07,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-11-17 15:37:07,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 659. [2021-11-17 15:37:07,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 617 states have (on average 1.2690437601296596) internal successors, (783), 623 states have internal predecessors, (783), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (28), 25 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-17 15:37:07,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 839 transitions. [2021-11-17 15:37:07,287 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 839 transitions. Word has length 93 [2021-11-17 15:37:07,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:37:07,288 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 839 transitions. [2021-11-17 15:37:07,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-17 15:37:07,288 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 839 transitions. [2021-11-17 15:37:07,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-17 15:37:07,289 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:37:07,289 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 15:37:07,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-17 15:37:07,503 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 [2021-11-17 15:37:07,504 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 15:37:07,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:37:07,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1976180910, now seen corresponding path program 1 times [2021-11-17 15:37:07,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:37:07,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259280575] [2021-11-17 15:37:07,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:37:07,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:37:07,519 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:37:07,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [798092446] [2021-11-17 15:37:07,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:37:07,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:37:07,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:37:07,521 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) [2021-11-17 15:37:07,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-17 15:37:07,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:37:07,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-17 15:37:07,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:37:07,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-17 15:37:07,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-17 15:37:07,909 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-17 15:37:07,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 15:37:07,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:37:07,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259280575] [2021-11-17 15:37:07,910 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:37:07,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798092446] [2021-11-17 15:37:07,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798092446] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 15:37:07,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 15:37:07,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-17 15:37:07,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468583663] [2021-11-17 15:37:07,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:37:07,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-17 15:37:07,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:37:07,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-17 15:37:07,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-17 15:37:07,913 INFO L87 Difference]: Start difference. First operand 659 states and 839 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-17 15:37:08,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:37:08,219 INFO L93 Difference]: Finished difference Result 927 states and 1199 transitions. [2021-11-17 15:37:08,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-17 15:37:08,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 98 [2021-11-17 15:37:08,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:37:08,224 INFO L225 Difference]: With dead ends: 927 [2021-11-17 15:37:08,224 INFO L226 Difference]: Without dead ends: 830 [2021-11-17 15:37:08,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-17 15:37:08,226 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 140 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-17 15:37:08,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 833 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-17 15:37:08,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-11-17 15:37:08,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 663. [2021-11-17 15:37:08,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 621 states have (on average 1.2673107890499196) internal successors, (787), 627 states have internal predecessors, (787), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (28), 25 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-17 15:37:08,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 843 transitions. [2021-11-17 15:37:08,253 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 843 transitions. Word has length 98 [2021-11-17 15:37:08,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:37:08,253 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 843 transitions. [2021-11-17 15:37:08,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-17 15:37:08,254 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 843 transitions. [2021-11-17 15:37:08,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-17 15:37:08,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:37:08,255 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 15:37:08,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-17 15:37:08,483 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 [2021-11-17 15:37:08,484 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 15:37:08,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:37:08,484 INFO L85 PathProgramCache]: Analyzing trace with hash -553663886, now seen corresponding path program 1 times [2021-11-17 15:37:08,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:37:08,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759615451] [2021-11-17 15:37:08,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:37:08,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:37:08,500 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:37:08,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [7016019] [2021-11-17 15:37:08,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:37:08,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:37:08,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:37:08,503 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) [2021-11-17 15:37:08,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-17 15:37:08,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:37:08,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-17 15:37:08,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:37:08,935 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-17 15:37:08,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 15:37:08,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:37:08,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759615451] [2021-11-17 15:37:08,935 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:37:08,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7016019] [2021-11-17 15:37:08,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7016019] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 15:37:08,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 15:37:08,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-17 15:37:08,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670466960] [2021-11-17 15:37:08,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:37:08,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-17 15:37:08,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:37:08,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-17 15:37:08,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-17 15:37:08,939 INFO L87 Difference]: Start difference. First operand 663 states and 843 transitions. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-17 15:37:09,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:37:09,069 INFO L93 Difference]: Finished difference Result 1266 states and 1623 transitions. [2021-11-17 15:37:09,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-17 15:37:09,070 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 110 [2021-11-17 15:37:09,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:37:09,073 INFO L225 Difference]: With dead ends: 1266 [2021-11-17 15:37:09,073 INFO L226 Difference]: Without dead ends: 668 [2021-11-17 15:37:09,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-17 15:37:09,075 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 18 mSDsluCounter, 1802 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 2107 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-17 15:37:09,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 2107 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-17 15:37:09,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-11-17 15:37:09,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 668. [2021-11-17 15:37:09,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 625 states have (on average 1.2672) internal successors, (792), 632 states have internal predecessors, (792), 28 states have call successors, (28), 10 states have call predecessors, (28), 11 states have return successors, (29), 25 states have call predecessors, (29), 28 states have call successors, (29) [2021-11-17 15:37:09,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 849 transitions. [2021-11-17 15:37:09,114 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 849 transitions. Word has length 110 [2021-11-17 15:37:09,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:37:09,115 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 849 transitions. [2021-11-17 15:37:09,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-17 15:37:09,115 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 849 transitions. [2021-11-17 15:37:09,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-17 15:37:09,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:37:09,117 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2021-11-17 15:37:09,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-17 15:37:09,343 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 [2021-11-17 15:37:09,344 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 15:37:09,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:37:09,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1849320704, now seen corresponding path program 1 times [2021-11-17 15:37:09,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:37:09,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557954058] [2021-11-17 15:37:09,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:37:09,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:37:09,359 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:37:09,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1669856082] [2021-11-17 15:37:09,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:37:09,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:37:09,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:37:09,361 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) [2021-11-17 15:37:09,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-17 15:37:09,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:37:09,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-17 15:37:09,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:37:09,922 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-17 15:37:09,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-17 15:37:10,205 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-17 15:37:10,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:37:10,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557954058] [2021-11-17 15:37:10,206 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:37:10,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669856082] [2021-11-17 15:37:10,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669856082] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-17 15:37:10,206 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-17 15:37:10,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2021-11-17 15:37:10,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210171362] [2021-11-17 15:37:10,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-17 15:37:10,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-17 15:37:10,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:37:10,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-17 15:37:10,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-17 15:37:10,208 INFO L87 Difference]: Start difference. First operand 668 states and 849 transitions. Second operand has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 12 states have internal predecessors, (107), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-17 15:37:10,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:37:10,469 INFO L93 Difference]: Finished difference Result 1289 states and 1655 transitions. [2021-11-17 15:37:10,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-17 15:37:10,470 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 12 states have internal predecessors, (107), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 112 [2021-11-17 15:37:10,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:37:10,473 INFO L225 Difference]: With dead ends: 1289 [2021-11-17 15:37:10,473 INFO L226 Difference]: Without dead ends: 684 [2021-11-17 15:37:10,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-11-17 15:37:10,475 INFO L933 BasicCegarLoop]: 306 mSDtfsCounter, 37 mSDsluCounter, 2113 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2419 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-17 15:37:10,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 2419 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-17 15:37:10,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-11-17 15:37:10,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 681. [2021-11-17 15:37:10,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 637 states have (on average 1.271585557299843) internal successors, (810), 644 states have internal predecessors, (810), 28 states have call successors, (28), 11 states have call predecessors, (28), 12 states have return successors, (29), 25 states have call predecessors, (29), 28 states have call successors, (29) [2021-11-17 15:37:10,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 867 transitions. [2021-11-17 15:37:10,497 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 867 transitions. Word has length 112 [2021-11-17 15:37:10,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:37:10,497 INFO L470 AbstractCegarLoop]: Abstraction has 681 states and 867 transitions. [2021-11-17 15:37:10,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 12 states have internal predecessors, (107), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-17 15:37:10,498 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 867 transitions. [2021-11-17 15:37:10,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-17 15:37:10,499 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:37:10,499 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 15:37:10,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-17 15:37:10,719 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 [2021-11-17 15:37:10,719 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 15:37:10,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:37:10,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1577750638, now seen corresponding path program 2 times [2021-11-17 15:37:10,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:37:10,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969120539] [2021-11-17 15:37:10,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:37:10,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:37:10,734 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:37:10,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1542795049] [2021-11-17 15:37:10,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-17 15:37:10,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:37:10,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:37:10,736 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) [2021-11-17 15:37:10,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-17 15:37:19,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-17 15:37:19,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-17 15:37:19,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-17 15:37:19,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:37:19,380 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 38 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-17 15:37:19,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-17 15:37:19,748 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-17 15:37:19,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:37:19,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969120539] [2021-11-17 15:37:19,748 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:37:19,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542795049] [2021-11-17 15:37:19,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542795049] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-17 15:37:19,749 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-17 15:37:19,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 19 [2021-11-17 15:37:19,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387550092] [2021-11-17 15:37:19,749 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-17 15:37:19,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-17 15:37:19,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:37:19,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-17 15:37:19,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-11-17 15:37:19,751 INFO L87 Difference]: Start difference. First operand 681 states and 867 transitions. Second operand has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-17 15:37:20,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:37:20,647 INFO L93 Difference]: Finished difference Result 1382 states and 1772 transitions. [2021-11-17 15:37:20,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-17 15:37:20,648 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 116 [2021-11-17 15:37:20,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:37:20,651 INFO L225 Difference]: With dead ends: 1382 [2021-11-17 15:37:20,651 INFO L226 Difference]: Without dead ends: 699 [2021-11-17 15:37:20,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=275, Invalid=915, Unknown=0, NotChecked=0, Total=1190 [2021-11-17 15:37:20,654 INFO L933 BasicCegarLoop]: 304 mSDtfsCounter, 329 mSDsluCounter, 2745 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 3049 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-17 15:37:20,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 3049 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-17 15:37:20,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-11-17 15:37:20,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 687. [2021-11-17 15:37:20,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 643 states have (on average 1.2690513219284603) internal successors, (816), 650 states have internal predecessors, (816), 28 states have call successors, (28), 11 states have call predecessors, (28), 12 states have return successors, (29), 25 states have call predecessors, (29), 28 states have call successors, (29) [2021-11-17 15:37:20,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 873 transitions. [2021-11-17 15:37:20,678 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 873 transitions. Word has length 116 [2021-11-17 15:37:20,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:37:20,678 INFO L470 AbstractCegarLoop]: Abstraction has 687 states and 873 transitions. [2021-11-17 15:37:20,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-17 15:37:20,679 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 873 transitions. [2021-11-17 15:37:20,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-17 15:37:20,680 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:37:20,680 INFO L514 BasicCegarLoop]: trace histogram [15, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 15:37:20,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-17 15:37:20,895 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 [2021-11-17 15:37:20,896 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 15:37:20,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:37:20,896 INFO L85 PathProgramCache]: Analyzing trace with hash -101405335, now seen corresponding path program 3 times [2021-11-17 15:37:20,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:37:20,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071051906] [2021-11-17 15:37:20,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:37:20,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:37:20,922 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:37:20,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267152632] [2021-11-17 15:37:20,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-17 15:37:20,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:37:20,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:37:20,924 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) [2021-11-17 15:37:20,944 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