/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/lcm1_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 20:52:15,741 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 20:52:15,743 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 20:52:15,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 20:52:15,785 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 20:52:15,785 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 20:52:15,786 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 20:52:15,799 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 20:52:15,800 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 20:52:15,801 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 20:52:15,802 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 20:52:15,802 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 20:52:15,803 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 20:52:15,804 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 20:52:15,805 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 20:52:15,807 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 20:52:15,808 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 20:52:15,811 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 20:52:15,815 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 20:52:15,816 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 20:52:15,817 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 20:52:15,819 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 20:52:15,820 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 20:52:15,821 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 20:52:15,826 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 20:52:15,826 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 20:52:15,826 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 20:52:15,827 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 20:52:15,827 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 20:52:15,827 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 20:52:15,827 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 20:52:15,828 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 20:52:15,828 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 20:52:15,829 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 20:52:15,829 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 20:52:15,830 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 20:52:15,830 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 20:52:15,830 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 20:52:15,830 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 20:52:15,831 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 20:52:15,831 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 20:52:15,835 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf [2022-01-10 20:52:15,861 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 20:52:15,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 20:52:15,862 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 20:52:15,862 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 20:52:15,863 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 20:52:15,863 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 20:52:15,863 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 20:52:15,863 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 20:52:15,863 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 20:52:15,863 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 20:52:15,864 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 20:52:15,864 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 20:52:15,864 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 20:52:15,864 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 20:52:15,864 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 20:52:15,864 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 20:52:15,864 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 20:52:15,864 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 20:52:15,864 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 20:52:15,865 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 20:52:15,865 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 20:52:15,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 20:52:15,865 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 20:52:15,865 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 20:52:15,865 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 20:52:15,865 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 20:52:15,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 20:52:15,865 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 20:52:15,865 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 20:52:15,865 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 20:52:15,865 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 20:52:15,866 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 20:52:15,866 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 20:52:15,866 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_NONE 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 20:52:16,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 20:52:16,064 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 20:52:16,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 20:52:16,066 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 20:52:16,066 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 20:52:16,067 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm1_unwindbound2.c [2022-01-10 20:52:16,122 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee070ebec/384bd33f3dea4e2eb1907486afc3d09c/FLAG980056a87 [2022-01-10 20:52:16,445 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 20:52:16,445 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm1_unwindbound2.c [2022-01-10 20:52:16,451 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee070ebec/384bd33f3dea4e2eb1907486afc3d09c/FLAG980056a87 [2022-01-10 20:52:16,896 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee070ebec/384bd33f3dea4e2eb1907486afc3d09c [2022-01-10 20:52:16,898 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 20:52:16,899 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 20:52:16,901 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 20:52:16,901 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 20:52:16,903 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 20:52:16,904 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:52:16" (1/1) ... [2022-01-10 20:52:16,905 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4caa4ab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:52:16, skipping insertion in model container [2022-01-10 20:52:16,905 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:52:16" (1/1) ... [2022-01-10 20:52:16,910 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 20:52:16,920 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 20:52:17,093 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm1_unwindbound2.c[552,565] [2022-01-10 20:52:17,117 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 20:52:17,127 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 20:52:17,139 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm1_unwindbound2.c[552,565] [2022-01-10 20:52:17,158 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 20:52:17,166 INFO L208 MainTranslator]: Completed translation [2022-01-10 20:52:17,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:52:17 WrapperNode [2022-01-10 20:52:17,167 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 20:52:17,168 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 20:52:17,168 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 20:52:17,168 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 20:52:17,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:52:17" (1/1) ... [2022-01-10 20:52:17,185 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:52:17" (1/1) ... [2022-01-10 20:52:17,206 INFO L137 Inliner]: procedures = 14, calls = 23, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 114 [2022-01-10 20:52:17,206 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 20:52:17,206 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 20:52:17,207 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 20:52:17,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 20:52:17,212 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:52:17" (1/1) ... [2022-01-10 20:52:17,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:52:17" (1/1) ... [2022-01-10 20:52:17,216 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:52:17" (1/1) ... [2022-01-10 20:52:17,216 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:52:17" (1/1) ... [2022-01-10 20:52:17,229 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:52:17" (1/1) ... [2022-01-10 20:52:17,233 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:52:17" (1/1) ... [2022-01-10 20:52:17,237 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:52:17" (1/1) ... [2022-01-10 20:52:17,240 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 20:52:17,241 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 20:52:17,241 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 20:52:17,241 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 20:52:17,242 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:52:17" (1/1) ... [2022-01-10 20:52:17,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 20:52:17,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:52:17,280 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) [2022-01-10 20:52:17,293 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 [2022-01-10 20:52:17,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 20:52:17,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 20:52:17,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 20:52:17,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 20:52:17,345 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 20:52:17,346 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 20:52:17,713 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 20:52:17,717 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 20:52:17,717 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-10 20:52:17,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:52:17 BoogieIcfgContainer [2022-01-10 20:52:17,718 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 20:52:17,718 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 20:52:17,719 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 20:52:17,720 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 20:52:17,722 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:52:17" (1/1) ... [2022-01-10 20:52:17,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 08:52:17 BasicIcfg [2022-01-10 20:52:17,792 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 20:52:17,793 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 20:52:17,793 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 20:52:17,795 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 20:52:17,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 08:52:16" (1/4) ... [2022-01-10 20:52:17,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@160c4a8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:52:17, skipping insertion in model container [2022-01-10 20:52:17,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:52:17" (2/4) ... [2022-01-10 20:52:17,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@160c4a8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:52:17, skipping insertion in model container [2022-01-10 20:52:17,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:52:17" (3/4) ... [2022-01-10 20:52:17,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@160c4a8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 08:52:17, skipping insertion in model container [2022-01-10 20:52:17,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 08:52:17" (4/4) ... [2022-01-10 20:52:17,797 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm1_unwindbound2.cTransformedIcfg [2022-01-10 20:52:17,800 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 20:52:17,800 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2022-01-10 20:52:17,835 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 20:52:17,841 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 [2022-01-10 20:52:17,841 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-01-10 20:52:17,851 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 37 states have (on average 1.6216216216216217) internal successors, (60), 42 states have internal predecessors, (60), 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) [2022-01-10 20:52:17,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-10 20:52:17,854 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:52:17,855 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:52:17,855 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-01-10 20:52:17,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:52:17,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1761100336, now seen corresponding path program 1 times [2022-01-10 20:52:17,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:52:17,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982830767] [2022-01-10 20:52:17,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:52:17,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:52:17,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:52:17,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:52:17,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:52:17,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982830767] [2022-01-10 20:52:17,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982830767] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 20:52:17,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 20:52:17,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 20:52:17,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144970807] [2022-01-10 20:52:17,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 20:52:17,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 20:52:17,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:52:17,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 20:52:17,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 20:52:17,975 INFO L87 Difference]: Start difference. First operand has 43 states, 37 states have (on average 1.6216216216216217) internal successors, (60), 42 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:52:17,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:52:17,985 INFO L93 Difference]: Finished difference Result 83 states and 116 transitions. [2022-01-10 20:52:17,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 20:52:17,988 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-10 20:52:17,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:52:17,993 INFO L225 Difference]: With dead ends: 83 [2022-01-10 20:52:17,993 INFO L226 Difference]: Without dead ends: 39 [2022-01-10 20:52:17,995 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 [2022-01-10 20:52:17,997 INFO L933 BasicCegarLoop]: 48 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, 48 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 [2022-01-10 20:52:17,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 20:52:18,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-10 20:52:18,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-01-10 20:52:18,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:52:18,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2022-01-10 20:52:18,016 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 14 [2022-01-10 20:52:18,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:52:18,017 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2022-01-10 20:52:18,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:52:18,017 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2022-01-10 20:52:18,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-10 20:52:18,017 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:52:18,018 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:52:18,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 20:52:18,018 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-01-10 20:52:18,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:52:18,018 INFO L85 PathProgramCache]: Analyzing trace with hash -57059858, now seen corresponding path program 1 times [2022-01-10 20:52:18,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:52:18,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595784271] [2022-01-10 20:52:18,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:52:18,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:52:18,059 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 20:52:18,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [941910336] [2022-01-10 20:52:18,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:52:18,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:52:18,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:52:18,062 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) [2022-01-10 20:52:18,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 20:52:18,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:52:18,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 20:52:18,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:52:18,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:52:18,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 20:52:18,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:52:18,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595784271] [2022-01-10 20:52:18,295 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 20:52:18,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941910336] [2022-01-10 20:52:18,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941910336] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 20:52:18,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 20:52:18,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 20:52:18,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208283689] [2022-01-10 20:52:18,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 20:52:18,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 20:52:18,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:52:18,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 20:52:18,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 20:52:18,297 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:52:18,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:52:18,441 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2022-01-10 20:52:18,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 20:52:18,442 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-10 20:52:18,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:52:18,443 INFO L225 Difference]: With dead ends: 71 [2022-01-10 20:52:18,443 INFO L226 Difference]: Without dead ends: 65 [2022-01-10 20:52:18,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 20:52:18,445 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 53 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 20:52:18,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 77 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 20:52:18,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-10 20:52:18,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 54. [2022-01-10 20:52:18,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 53 states have internal predecessors, (65), 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) [2022-01-10 20:52:18,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2022-01-10 20:52:18,451 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 14 [2022-01-10 20:52:18,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:52:18,452 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2022-01-10 20:52:18,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:52:18,452 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2022-01-10 20:52:18,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 20:52:18,452 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:52:18,452 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:52:18,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 20:52:18,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:52:18,660 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-01-10 20:52:18,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:52:18,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1768890245, now seen corresponding path program 1 times [2022-01-10 20:52:18,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:52:18,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612790122] [2022-01-10 20:52:18,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:52:18,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:52:18,682 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 20:52:18,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1665483411] [2022-01-10 20:52:18,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:52:18,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:52:18,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:52:18,691 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) [2022-01-10 20:52:18,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 20:52:18,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:52:18,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 20:52:18,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:52:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:52:18,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 20:52:18,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:52:18,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612790122] [2022-01-10 20:52:18,854 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 20:52:18,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665483411] [2022-01-10 20:52:18,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665483411] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 20:52:18,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 20:52:18,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 20:52:18,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060722050] [2022-01-10 20:52:18,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 20:52:18,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 20:52:18,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:52:18,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 20:52:18,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 20:52:18,855 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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) [2022-01-10 20:52:18,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:52:18,870 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2022-01-10 20:52:18,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 20:52:18,870 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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 15 [2022-01-10 20:52:18,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:52:18,872 INFO L225 Difference]: With dead ends: 64 [2022-01-10 20:52:18,872 INFO L226 Difference]: Without dead ends: 56 [2022-01-10 20:52:18,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 20:52:18,873 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 20:52:18,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 112 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 20:52:18,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-10 20:52:18,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-01-10 20:52:18,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 55 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:52:18,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2022-01-10 20:52:18,878 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 15 [2022-01-10 20:52:18,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:52:18,878 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2022-01-10 20:52:18,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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) [2022-01-10 20:52:18,879 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2022-01-10 20:52:18,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-10 20:52:18,879 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:52:18,879 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:52:18,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 20:52:19,079 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,SelfDestructingSolverStorable2 [2022-01-10 20:52:19,080 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-01-10 20:52:19,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:52:19,081 INFO L85 PathProgramCache]: Analyzing trace with hash -987547580, now seen corresponding path program 1 times [2022-01-10 20:52:19,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:52:19,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063817366] [2022-01-10 20:52:19,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:52:19,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:52:19,096 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 20:52:19,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2005851094] [2022-01-10 20:52:19,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:52:19,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:52:19,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:52:19,102 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) [2022-01-10 20:52:19,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 20:52:19,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:52:19,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 20:52:19,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:52:19,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:52:19,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 20:52:19,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:52:19,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063817366] [2022-01-10 20:52:19,353 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 20:52:19,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005851094] [2022-01-10 20:52:19,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005851094] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 20:52:19,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 20:52:19,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 20:52:19,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569695810] [2022-01-10 20:52:19,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 20:52:19,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 20:52:19,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:52:19,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 20:52:19,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 20:52:19,356 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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) [2022-01-10 20:52:22,247 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-10 20:52:22,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:52:22,328 INFO L93 Difference]: Finished difference Result 87 states and 102 transitions. [2022-01-10 20:52:22,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 20:52:22,329 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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 18 [2022-01-10 20:52:22,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:52:22,330 INFO L225 Difference]: With dead ends: 87 [2022-01-10 20:52:22,330 INFO L226 Difference]: Without dead ends: 79 [2022-01-10 20:52:22,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 20:52:22,331 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 52 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-10 20:52:22,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 100 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 61 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2022-01-10 20:52:22,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-10 20:52:22,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2022-01-10 20:52:22,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.3181818181818181) internal successors, (87), 70 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:52:22,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2022-01-10 20:52:22,338 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 18 [2022-01-10 20:52:22,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:52:22,338 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2022-01-10 20:52:22,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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) [2022-01-10 20:52:22,338 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2022-01-10 20:52:22,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 20:52:22,339 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:52:22,343 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] [2022-01-10 20:52:22,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 20:52:22,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:52:22,556 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-01-10 20:52:22,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:52:22,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1604529721, now seen corresponding path program 1 times [2022-01-10 20:52:22,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:52:22,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178554000] [2022-01-10 20:52:22,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:52:22,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:52:22,571 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 20:52:22,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2123684809] [2022-01-10 20:52:22,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:52:22,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:52:22,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:52:22,573 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) [2022-01-10 20:52:22,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 20:52:22,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:52:22,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 20:52:22,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:52:22,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:52:22,817 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 20:52:22,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:52:22,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178554000] [2022-01-10 20:52:22,818 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 20:52:22,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123684809] [2022-01-10 20:52:22,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123684809] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 20:52:22,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 20:52:22,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 20:52:22,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55434067] [2022-01-10 20:52:22,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 20:52:22,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 20:52:22,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:52:22,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 20:52:22,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 20:52:22,819 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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) [2022-01-10 20:52:22,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:52:22,844 INFO L93 Difference]: Finished difference Result 135 states and 168 transitions. [2022-01-10 20:52:22,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 20:52:22,844 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 24 [2022-01-10 20:52:22,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:52:22,845 INFO L225 Difference]: With dead ends: 135 [2022-01-10 20:52:22,845 INFO L226 Difference]: Without dead ends: 76 [2022-01-10 20:52:22,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 20:52:22,846 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 20:52:22,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 149 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 20:52:22,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-01-10 20:52:22,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-01-10 20:52:22,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.295774647887324) internal successors, (92), 75 states have internal predecessors, (92), 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) [2022-01-10 20:52:22,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 92 transitions. [2022-01-10 20:52:22,852 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 92 transitions. Word has length 24 [2022-01-10 20:52:22,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:52:22,852 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 92 transitions. [2022-01-10 20:52:22,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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) [2022-01-10 20:52:22,853 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 92 transitions. [2022-01-10 20:52:22,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 20:52:22,853 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:52:22,853 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:52:22,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-10 20:52:23,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:52:23,073 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-01-10 20:52:23,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:52:23,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1238373991, now seen corresponding path program 1 times [2022-01-10 20:52:23,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:52:23,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561306800] [2022-01-10 20:52:23,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:52:23,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:52:23,092 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 20:52:23,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1962156576] [2022-01-10 20:52:23,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:52:23,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:52:23,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:52:23,096 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) [2022-01-10 20:52:23,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-10 20:52:23,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:52:23,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-10 20:52:23,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:52:23,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:52:23,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:52:24,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:52:24,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:52:24,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561306800] [2022-01-10 20:52:24,176 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 20:52:24,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962156576] [2022-01-10 20:52:24,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962156576] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:52:24,177 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 20:52:24,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-01-10 20:52:24,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254928358] [2022-01-10 20:52:24,177 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 20:52:24,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 20:52:24,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:52:24,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 20:52:24,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-01-10 20:52:24,178 INFO L87 Difference]: Start difference. First operand 76 states and 92 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 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) [2022-01-10 20:52:24,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:52:24,251 INFO L93 Difference]: Finished difference Result 111 states and 134 transitions. [2022-01-10 20:52:24,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 20:52:24,252 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 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 24 [2022-01-10 20:52:24,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:52:24,253 INFO L225 Difference]: With dead ends: 111 [2022-01-10 20:52:24,253 INFO L226 Difference]: Without dead ends: 82 [2022-01-10 20:52:24,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-01-10 20:52:24,254 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 17 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 20:52:24,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 243 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 19 Invalid, 0 Unknown, 10 Unchecked, 0.1s Time] [2022-01-10 20:52:24,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-01-10 20:52:24,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2022-01-10 20:52:24,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.2894736842105263) internal successors, (98), 80 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:52:24,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 98 transitions. [2022-01-10 20:52:24,260 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 98 transitions. Word has length 24 [2022-01-10 20:52:24,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:52:24,260 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 98 transitions. [2022-01-10 20:52:24,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 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) [2022-01-10 20:52:24,261 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 98 transitions. [2022-01-10 20:52:24,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-10 20:52:24,261 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:52:24,261 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] [2022-01-10 20:52:24,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-10 20:52:24,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:52:24,474 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-01-10 20:52:24,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:52:24,474 INFO L85 PathProgramCache]: Analyzing trace with hash 370363404, now seen corresponding path program 1 times [2022-01-10 20:52:24,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:52:24,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451288483] [2022-01-10 20:52:24,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:52:24,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:52:24,496 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 20:52:24,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1987055623] [2022-01-10 20:52:24,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:52:24,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:52:24,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:52:24,505 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) [2022-01-10 20:52:24,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-10 20:52:24,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:52:24,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-10 20:52:24,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:52:25,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:52:25,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:52:26,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:52:26,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:52:26,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451288483] [2022-01-10 20:52:26,859 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 20:52:26,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987055623] [2022-01-10 20:52:26,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987055623] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:52:26,859 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 20:52:26,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 20:52:26,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157166260] [2022-01-10 20:52:26,860 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 20:52:26,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 20:52:26,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:52:26,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 20:52:26,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-01-10 20:52:26,861 INFO L87 Difference]: Start difference. First operand 81 states and 98 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:52:27,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:52:27,524 INFO L93 Difference]: Finished difference Result 151 states and 188 transitions. [2022-01-10 20:52:27,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 20:52:27,525 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-10 20:52:27,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:52:27,525 INFO L225 Difference]: With dead ends: 151 [2022-01-10 20:52:27,525 INFO L226 Difference]: Without dead ends: 92 [2022-01-10 20:52:27,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2022-01-10 20:52:27,526 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 52 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 20:52:27,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 268 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 38 Invalid, 0 Unknown, 17 Unchecked, 0.2s Time] [2022-01-10 20:52:27,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-01-10 20:52:27,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2022-01-10 20:52:27,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.2804878048780488) internal successors, (105), 86 states have internal predecessors, (105), 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) [2022-01-10 20:52:27,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 105 transitions. [2022-01-10 20:52:27,534 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 105 transitions. Word has length 26 [2022-01-10 20:52:27,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:52:27,535 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 105 transitions. [2022-01-10 20:52:27,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:52:27,535 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 105 transitions. [2022-01-10 20:52:27,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-10 20:52:27,535 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:52:27,535 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] [2022-01-10 20:52:27,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-10 20:52:27,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:52:27,752 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-01-10 20:52:27,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:52:27,752 INFO L85 PathProgramCache]: Analyzing trace with hash -422002016, now seen corresponding path program 1 times [2022-01-10 20:52:27,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:52:27,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806862697] [2022-01-10 20:52:27,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:52:27,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:52:27,771 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 20:52:27,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1473556546] [2022-01-10 20:52:27,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:52:27,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:52:27,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:52:27,776 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) [2022-01-10 20:52:27,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-10 20:52:27,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-10 20:52:27,872 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-10 20:52:27,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-10 20:52:27,928 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-01-10 20:52:27,928 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-10 20:52:27,929 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (4 of 5 remaining) [2022-01-10 20:52:27,944 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-01-10 20:52:27,944 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-01-10 20:52:27,944 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-01-10 20:52:27,944 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-01-10 20:52:27,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-10 20:52:28,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:52:28,147 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:52:28,149 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-10 20:52:28,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 08:52:28 BasicIcfg [2022-01-10 20:52:28,175 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-10 20:52:28,175 INFO L158 Benchmark]: Toolchain (without parser) took 11276.00ms. Allocated memory was 184.5MB in the beginning and 266.3MB in the end (delta: 81.8MB). Free memory was 129.2MB in the beginning and 181.9MB in the end (delta: -52.7MB). Peak memory consumption was 30.2MB. Max. memory is 8.0GB. [2022-01-10 20:52:28,175 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 184.5MB. Free memory is still 145.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-10 20:52:28,176 INFO L158 Benchmark]: CACSL2BoogieTranslator took 266.41ms. Allocated memory was 184.5MB in the beginning and 266.3MB in the end (delta: 81.8MB). Free memory was 129.0MB in the beginning and 237.5MB in the end (delta: -108.5MB). Peak memory consumption was 8.8MB. Max. memory is 8.0GB. [2022-01-10 20:52:28,176 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.21ms. Allocated memory is still 266.3MB. Free memory was 237.5MB in the beginning and 236.0MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-10 20:52:28,176 INFO L158 Benchmark]: Boogie Preprocessor took 33.40ms. Allocated memory is still 266.3MB. Free memory was 236.0MB in the beginning and 234.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-10 20:52:28,176 INFO L158 Benchmark]: RCFGBuilder took 477.40ms. Allocated memory is still 266.3MB. Free memory was 234.4MB in the beginning and 221.8MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-01-10 20:52:28,176 INFO L158 Benchmark]: IcfgTransformer took 73.60ms. Allocated memory is still 266.3MB. Free memory was 221.8MB in the beginning and 216.0MB in the end (delta: 5.8MB). Peak memory consumption was 5.2MB. Max. memory is 8.0GB. [2022-01-10 20:52:28,177 INFO L158 Benchmark]: TraceAbstraction took 10381.70ms. Allocated memory is still 266.3MB. Free memory was 215.5MB in the beginning and 181.9MB in the end (delta: 33.6MB). Peak memory consumption was 34.6MB. Max. memory is 8.0GB. [2022-01-10 20:52:28,178 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 184.5MB. Free memory is still 145.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 266.41ms. Allocated memory was 184.5MB in the beginning and 266.3MB in the end (delta: 81.8MB). Free memory was 129.0MB in the beginning and 237.5MB in the end (delta: -108.5MB). Peak memory consumption was 8.8MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 38.21ms. Allocated memory is still 266.3MB. Free memory was 237.5MB in the beginning and 236.0MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 33.40ms. Allocated memory is still 266.3MB. Free memory was 236.0MB in the beginning and 234.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 477.40ms. Allocated memory is still 266.3MB. Free memory was 234.4MB in the beginning and 221.8MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 73.60ms. Allocated memory is still 266.3MB. Free memory was 221.8MB in the beginning and 216.0MB in the end (delta: 5.8MB). Peak memory consumption was 5.2MB. Max. memory is 8.0GB. * TraceAbstraction took 10381.70ms. Allocated memory is still 266.3MB. Free memory was 215.5MB in the beginning and 181.9MB in the end (delta: 33.6MB). Peak memory consumption was 34.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [counter=0] [L24] unsigned a, b; [L25] unsigned x, y, u, v; [L26] a = __VERIFIER_nondet_uint() [L27] b = __VERIFIER_nondet_uint() [L28] CALL assume_abort_if_not(a >= 1) [L12] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L28] RET assume_abort_if_not(a >= 1) [L29] CALL assume_abort_if_not(b >= 1) [L12] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L29] RET assume_abort_if_not(b >= 1) [L31] CALL assume_abort_if_not(a <= 65535) [L12] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L31] RET assume_abort_if_not(a <= 65535) [L32] CALL assume_abort_if_not(b <= 65535) [L12] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L32] RET assume_abort_if_not(b <= 65535) [L34] x = a [L35] y = b [L36] u = b [L37] v = 0 VAL [a=-1, b=-2, counter=0, u=-2, v=0, x=-1, y=-2] [L39] EXPR counter++ VAL [a=-1, b=-2, counter=1, counter++=0, u=-2, v=0, x=-1, y=-2] [L39] COND TRUE counter++<2 [L40] CALL __VERIFIER_assert(x*u + y*v == a*b) [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L40] RET __VERIFIER_assert(x*u + y*v == a*b) [L41] COND FALSE !(!(x != y)) VAL [a=-1, b=-2, counter=1, u=-2, v=0, x=-1, y=-2] [L44] EXPR counter++ VAL [a=-1, b=-2, counter=2, counter++=-1, u=-2, v=0, x=-1, y=-2] [L44] COND TRUE counter++<2 [L45] CALL __VERIFIER_assert(x*u + y*v == a*b) [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L45] RET __VERIFIER_assert(x*u + y*v == a*b) [L46] COND TRUE !(x > y) VAL [a=-1, b=-2, counter=2, u=-2, v=0, x=-1, y=-2] [L52] EXPR counter++ VAL [a=-1, b=-2, counter=3, counter++=-2, u=-2, v=0, x=-1, y=-2] [L52] COND FALSE !(counter++<2) [L39] EXPR counter++ VAL [a=-1, b=-2, counter=4, counter++=-1, u=-2, v=0, x=-1, y=-2] [L39] COND FALSE !(counter++<2) [L61] CALL __VERIFIER_assert(u*y + v*y == a*b) [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=4] [L17] reach_error() VAL [\old(cond)=0, cond=0, counter=4] - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 43 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 10.3s, OverallIterations: 8, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 4.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 174 SdHoareTripleChecker+Valid, 3.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 174 mSDsluCounter, 997 SdHoareTripleChecker+Invalid, 3.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 27 IncrementalHoareTripleChecker+Unchecked, 727 mSDsCounter, 51 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 187 IncrementalHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 51 mSolverCounterUnsat, 270 mSDtfsCounter, 187 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 171 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=7, InterpolantAutomatonStates: 44, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 25 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 3.9s InterpolantComputationTime, 162 NumberOfCodeBlocks, 162 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 176 ConstructedInterpolants, 12 QuantifiedInterpolants, 2961 SizeOfPredicates, 17 NumberOfNonLiveVariables, 1299 ConjunctsInSsa, 75 ConjunctsInUnsatCore, 9 InterpolantComputations, 5 PerfectInterpolantSequences, 5/12 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-01-10 20:52:28,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...