/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/array-crafted/zero_sum_const3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 21:23:50,111 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 21:23:50,112 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 21:23:50,137 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 21:23:50,138 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 21:23:50,138 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 21:23:50,143 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 21:23:50,148 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 21:23:50,149 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 21:23:50,153 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 21:23:50,154 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 21:23:50,154 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 21:23:50,155 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 21:23:50,156 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 21:23:50,157 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 21:23:50,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 21:23:50,160 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 21:23:50,160 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 21:23:50,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 21:23:50,166 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 21:23:50,166 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 21:23:50,169 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 21:23:50,169 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 21:23:50,170 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 21:23:50,171 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 21:23:50,171 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 21:23:50,171 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 21:23:50,172 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 21:23:50,172 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 21:23:50,173 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 21:23:50,173 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 21:23:50,174 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 21:23:50,174 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 21:23:50,175 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 21:23:50,175 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 21:23:50,176 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 21:23:50,176 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 21:23:50,176 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 21:23:50,176 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 21:23:50,177 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 21:23:50,177 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 21:23:50,183 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 21:23:50,221 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 21:23:50,221 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 21:23:50,221 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 21:23:50,222 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 21:23:50,222 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 21:23:50,223 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 21:23:50,223 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 21:23:50,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 21:23:50,223 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 21:23:50,223 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 21:23:50,225 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 21:23:50,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 21:23:50,231 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 21:23:50,231 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 21:23:50,231 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 21:23:50,231 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 21:23:50,231 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 21:23:50,231 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 21:23:50,231 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 21:23:50,231 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 21:23:50,231 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 21:23:50,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 21:23:50,233 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 21:23:50,233 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 21:23:50,233 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 21:23:50,233 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 21:23:50,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 21:23:50,233 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 21:23:50,233 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 21:23:50,233 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 21:23:50,233 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 21:23:50,234 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 21:23:50,236 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 21:23:50,238 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 21:23:50,432 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 21:23:50,449 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 21:23:50,450 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 21:23:50,451 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 21:23:50,453 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 21:23:50,453 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const3.c [2022-01-10 21:23:50,506 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/454ff0f9b/4c50b0e9f42948d183659707ed04fc74/FLAG1439067f6 [2022-01-10 21:23:50,891 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 21:23:50,891 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const3.c [2022-01-10 21:23:50,895 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/454ff0f9b/4c50b0e9f42948d183659707ed04fc74/FLAG1439067f6 [2022-01-10 21:23:51,306 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/454ff0f9b/4c50b0e9f42948d183659707ed04fc74 [2022-01-10 21:23:51,307 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 21:23:51,308 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 21:23:51,309 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 21:23:51,309 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 21:23:51,311 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 21:23:51,312 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:23:51" (1/1) ... [2022-01-10 21:23:51,312 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42f3f727 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:23:51, skipping insertion in model container [2022-01-10 21:23:51,312 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:23:51" (1/1) ... [2022-01-10 21:23:51,318 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 21:23:51,329 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 21:23:51,436 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const3.c[406,419] [2022-01-10 21:23:51,468 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 21:23:51,477 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 21:23:51,489 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const3.c[406,419] [2022-01-10 21:23:51,522 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 21:23:51,532 INFO L208 MainTranslator]: Completed translation [2022-01-10 21:23:51,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:23:51 WrapperNode [2022-01-10 21:23:51,533 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 21:23:51,534 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 21:23:51,534 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 21:23:51,534 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 21:23:51,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:23:51" (1/1) ... [2022-01-10 21:23:51,550 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:23:51" (1/1) ... [2022-01-10 21:23:51,569 INFO L137 Inliner]: procedures = 18, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 103 [2022-01-10 21:23:51,569 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 21:23:51,570 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 21:23:51,570 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 21:23:51,570 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 21:23:51,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:23:51" (1/1) ... [2022-01-10 21:23:51,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:23:51" (1/1) ... [2022-01-10 21:23:51,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:23:51" (1/1) ... [2022-01-10 21:23:51,580 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:23:51" (1/1) ... [2022-01-10 21:23:51,594 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:23:51" (1/1) ... [2022-01-10 21:23:51,598 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:23:51" (1/1) ... [2022-01-10 21:23:51,602 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:23:51" (1/1) ... [2022-01-10 21:23:51,605 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 21:23:51,606 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 21:23:51,606 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 21:23:51,606 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 21:23:51,607 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:23:51" (1/1) ... [2022-01-10 21:23:51,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 21:23:51,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:23:51,636 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 21:23:51,663 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 21:23:51,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 21:23:51,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 21:23:51,671 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2022-01-10 21:23:51,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-10 21:23:51,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 21:23:51,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 21:23:51,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2022-01-10 21:23:51,729 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 21:23:51,730 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 21:23:52,007 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 21:23:52,011 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 21:23:52,011 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2022-01-10 21:23:52,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:23:52 BoogieIcfgContainer [2022-01-10 21:23:52,013 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 21:23:52,013 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 21:23:52,013 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 21:23:52,014 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 21:23:52,016 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:23:52" (1/1) ... [2022-01-10 21:23:52,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:23:52 BasicIcfg [2022-01-10 21:23:52,130 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 21:23:52,131 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 21:23:52,131 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 21:23:52,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 21:23:52,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 09:23:51" (1/4) ... [2022-01-10 21:23:52,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b39765 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:23:52, skipping insertion in model container [2022-01-10 21:23:52,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:23:51" (2/4) ... [2022-01-10 21:23:52,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b39765 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:23:52, skipping insertion in model container [2022-01-10 21:23:52,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:23:52" (3/4) ... [2022-01-10 21:23:52,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b39765 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 09:23:52, skipping insertion in model container [2022-01-10 21:23:52,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:23:52" (4/4) ... [2022-01-10 21:23:52,136 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const3.cTransformedIcfg [2022-01-10 21:23:52,139 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 21:23:52,139 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 21:23:52,183 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 21:23:52,189 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 21:23:52,189 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 21:23:52,200 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:23:52,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 21:23:52,204 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:23:52,204 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:23:52,204 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:23:52,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:23:52,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1810874927, now seen corresponding path program 1 times [2022-01-10 21:23:52,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:23:52,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658414912] [2022-01-10 21:23:52,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:23:52,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:23:52,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:23:52,379 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 21:23:52,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:23:52,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658414912] [2022-01-10 21:23:52,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658414912] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:23:52,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:23:52,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:23:52,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154310750] [2022-01-10 21:23:52,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:23:52,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 21:23:52,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:23:52,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 21:23:52,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 21:23:52,410 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 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 21:23:52,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:23:52,422 INFO L93 Difference]: Finished difference Result 59 states and 86 transitions. [2022-01-10 21:23:52,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 21:23:52,424 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 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 19 [2022-01-10 21:23:52,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:23:52,429 INFO L225 Difference]: With dead ends: 59 [2022-01-10 21:23:52,429 INFO L226 Difference]: Without dead ends: 27 [2022-01-10 21:23:52,431 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 21:23:52,434 INFO L933 BasicCegarLoop]: 39 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, 39 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 21:23:52,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 21:23:52,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-10 21:23:52,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-10 21:23:52,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 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 21:23:52,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-01-10 21:23:52,458 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 19 [2022-01-10 21:23:52,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:23:52,459 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-01-10 21:23:52,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 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 21:23:52,460 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-01-10 21:23:52,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 21:23:52,461 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:23:52,461 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:23:52,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 21:23:52,461 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:23:52,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:23:52,463 INFO L85 PathProgramCache]: Analyzing trace with hash -926415733, now seen corresponding path program 1 times [2022-01-10 21:23:52,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:23:52,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112737254] [2022-01-10 21:23:52,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:23:52,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:23:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:23:52,621 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 21:23:52,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:23:52,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112737254] [2022-01-10 21:23:52,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112737254] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:23:52,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:23:52,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 21:23:52,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842215175] [2022-01-10 21:23:52,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:23:52,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:23:52,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:23:52,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:23:52,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:23:52,624 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 21:23:52,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:23:52,711 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2022-01-10 21:23:52,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:23:52,711 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 19 [2022-01-10 21:23:52,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:23:52,712 INFO L225 Difference]: With dead ends: 42 [2022-01-10 21:23:52,712 INFO L226 Difference]: Without dead ends: 38 [2022-01-10 21:23:52,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:23:52,713 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 21:23:52,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 71 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 21:23:52,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-10 21:23:52,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-01-10 21:23:52,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:23:52,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2022-01-10 21:23:52,717 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 19 [2022-01-10 21:23:52,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:23:52,718 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2022-01-10 21:23:52,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 21:23:52,718 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2022-01-10 21:23:52,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-10 21:23:52,718 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:23:52,719 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:23:52,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 21:23:52,719 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:23:52,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:23:52,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1197854259, now seen corresponding path program 1 times [2022-01-10 21:23:52,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:23:52,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341540346] [2022-01-10 21:23:52,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:23:52,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:23:52,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:23:52,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 21:23:52,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:23:52,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341540346] [2022-01-10 21:23:52,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341540346] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:23:52,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:23:52,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 21:23:52,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008523419] [2022-01-10 21:23:52,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:23:52,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:23:52,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:23:52,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:23:52,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:23:52,987 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:23:53,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:23:53,159 INFO L93 Difference]: Finished difference Result 74 states and 97 transitions. [2022-01-10 21:23:53,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:23:53,160 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-10 21:23:53,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:23:53,160 INFO L225 Difference]: With dead ends: 74 [2022-01-10 21:23:53,161 INFO L226 Difference]: Without dead ends: 41 [2022-01-10 21:23:53,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:23:53,162 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 21:23:53,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 15 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 21:23:53,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-10 21:23:53,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2022-01-10 21:23:53,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 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 21:23:53,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-01-10 21:23:53,167 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 21 [2022-01-10 21:23:53,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:23:53,167 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-01-10 21:23:53,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:23:53,167 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-01-10 21:23:53,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-10 21:23:53,168 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:23:53,168 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:23:53,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 21:23:53,168 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:23:53,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:23:53,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1054038149, now seen corresponding path program 1 times [2022-01-10 21:23:53,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:23:53,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573717299] [2022-01-10 21:23:53,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:23:53,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:23:53,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:23:53,440 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 21:23:53,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:23:53,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573717299] [2022-01-10 21:23:53,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573717299] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:23:53,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891604963] [2022-01-10 21:23:53,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:23:53,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:23:53,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:23:53,452 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 21:23:53,471 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 21:23:53,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:23:53,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 21:23:53,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:23:53,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 21:23:53,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 21:23:53,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 21:23:53,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891604963] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 21:23:53,941 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 21:23:53,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-01-10 21:23:53,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497214220] [2022-01-10 21:23:53,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 21:23:53,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 21:23:53,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:23:53,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 21:23:53,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-10 21:23:53,945 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 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 21:23:54,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:23:54,373 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2022-01-10 21:23:54,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 21:23:54,373 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 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 33 [2022-01-10 21:23:54,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:23:54,374 INFO L225 Difference]: With dead ends: 65 [2022-01-10 21:23:54,374 INFO L226 Difference]: Without dead ends: 37 [2022-01-10 21:23:54,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-10 21:23:54,375 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 21:23:54,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 34 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 21:23:54,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-10 21:23:54,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-01-10 21:23:54,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:23:54,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-01-10 21:23:54,382 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 33 [2022-01-10 21:23:54,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:23:54,383 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-01-10 21:23:54,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 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 21:23:54,383 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-01-10 21:23:54,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-10 21:23:54,384 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:23:54,384 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:23:54,390 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 21:23:54,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:23:54,589 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:23:54,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:23:54,590 INFO L85 PathProgramCache]: Analyzing trace with hash -320838178, now seen corresponding path program 2 times [2022-01-10 21:23:54,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:23:54,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824960674] [2022-01-10 21:23:54,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:23:54,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:23:54,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:23:55,231 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 21:23:55,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:23:55,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824960674] [2022-01-10 21:23:55,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824960674] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:23:55,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293186578] [2022-01-10 21:23:55,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 21:23:55,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:23:55,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:23:55,244 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 21:23:55,247 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 21:23:55,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 21:23:55,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 21:23:55,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 21:23:55,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:23:55,747 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 21:23:55,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 21:23:56,434 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 21:23:56,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293186578] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 21:23:56,435 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 21:23:56,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 18 [2022-01-10 21:23:56,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855303544] [2022-01-10 21:23:56,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 21:23:56,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 21:23:56,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:23:56,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 21:23:56,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-01-10 21:23:56,436 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 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 21:24:01,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:24:01,848 INFO L93 Difference]: Finished difference Result 117 states and 146 transitions. [2022-01-10 21:24:01,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 21:24:01,849 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 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 35 [2022-01-10 21:24:01,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:24:01,849 INFO L225 Difference]: With dead ends: 117 [2022-01-10 21:24:01,849 INFO L226 Difference]: Without dead ends: 93 [2022-01-10 21:24:01,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2022-01-10 21:24:01,851 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 235 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-01-10 21:24:01,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 33 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-01-10 21:24:01,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-10 21:24:01,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 48. [2022-01-10 21:24:01,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 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 21:24:01,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2022-01-10 21:24:01,866 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 35 [2022-01-10 21:24:01,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:24:01,867 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2022-01-10 21:24:01,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 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 21:24:01,867 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2022-01-10 21:24:01,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-10 21:24:01,869 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:24:01,870 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:24:01,877 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 21:24:02,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:24:02,071 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:24:02,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:24:02,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1745327125, now seen corresponding path program 3 times [2022-01-10 21:24:02,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:24:02,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197238762] [2022-01-10 21:24:02,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:24:02,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:24:03,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat