/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 11:06:02,865 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 11:06:02,866 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 11:06:02,898 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 11:06:02,899 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 11:06:02,899 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 11:06:02,902 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 11:06:02,907 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 11:06:02,908 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 11:06:02,912 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 11:06:02,913 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 11:06:02,913 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 11:06:02,913 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 11:06:02,914 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 11:06:02,914 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 11:06:02,915 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 11:06:02,915 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 11:06:02,916 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 11:06:02,917 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 11:06:02,918 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 11:06:02,918 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 11:06:02,921 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 11:06:02,922 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 11:06:02,923 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 11:06:02,924 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 11:06:02,931 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-04-06 11:06:02,932 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-04-06 11:06:02,932 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-04-06 11:06:02,932 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-04-06 11:06:02,932 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-04-06 11:06:02,933 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-04-06 11:06:02,933 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-04-06 11:06:02,935 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-04-06 11:06:02,935 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-04-06 11:06:02,935 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-04-06 11:06:02,936 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-04-06 11:06:02,936 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-04-06 11:06:02,936 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-04-06 11:06:02,936 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-04-06 11:06:02,936 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 11:06:02,937 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 11:06:02,939 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 11:06:02,939 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-06 11:06:02,965 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 11:06:02,965 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 11:06:02,966 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-06 11:06:02,966 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-06 11:06:02,967 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-06 11:06:02,967 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-06 11:06:02,967 INFO L138 SettingsManager]: * Use SBE=true [2022-04-06 11:06:02,967 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 11:06:02,967 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 11:06:02,968 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 11:06:02,968 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 11:06:02,968 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 11:06:02,968 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 11:06:02,968 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 11:06:02,968 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 11:06:02,969 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 11:06:02,969 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 11:06:02,969 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 11:06:02,969 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 11:06:02,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 11:06:02,969 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 11:06:02,969 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-06 11:06:02,970 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-06 11:06:02,970 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 11:06:02,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-06 11:06:02,970 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 11:06:02,970 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-06 11:06:02,970 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-06 11:06:02,971 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 11:06:02,971 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 11:06:03,110 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 11:06:03,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 11:06:03,129 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 11:06:03,130 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 11:06:03,135 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 11:06:03,136 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound20.c [2022-04-06 11:06:03,194 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/031cb3314/52fc6d0f8f524842a1f781acb705a45c/FLAGc2b9c2558 [2022-04-06 11:06:03,475 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 11:06:03,475 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound20.c [2022-04-06 11:06:03,479 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/031cb3314/52fc6d0f8f524842a1f781acb705a45c/FLAGc2b9c2558 [2022-04-06 11:06:03,916 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/031cb3314/52fc6d0f8f524842a1f781acb705a45c [2022-04-06 11:06:03,918 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 11:06:03,919 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 11:06:03,920 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 11:06:03,920 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 11:06:03,924 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 11:06:03,924 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 11:06:03" (1/1) ... [2022-04-06 11:06:03,925 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64898783 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:06:03, skipping insertion in model container [2022-04-06 11:06:03,925 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 11:06:03" (1/1) ... [2022-04-06 11:06:03,930 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 11:06:03,946 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 11:06:04,074 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/dijkstra-u_unwindbound20.c[525,538] [2022-04-06 11:06:04,094 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 11:06:04,099 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 11:06:04,106 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/dijkstra-u_unwindbound20.c[525,538] [2022-04-06 11:06:04,115 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 11:06:04,129 INFO L208 MainTranslator]: Completed translation [2022-04-06 11:06:04,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:06:04 WrapperNode [2022-04-06 11:06:04,130 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 11:06:04,130 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 11:06:04,130 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 11:06:04,130 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 11:06:04,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:06:04" (1/1) ... [2022-04-06 11:06:04,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:06:04" (1/1) ... [2022-04-06 11:06:04,142 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:06:04" (1/1) ... [2022-04-06 11:06:04,142 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:06:04" (1/1) ... [2022-04-06 11:06:04,146 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:06:04" (1/1) ... [2022-04-06 11:06:04,149 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:06:04" (1/1) ... [2022-04-06 11:06:04,150 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:06:04" (1/1) ... [2022-04-06 11:06:04,151 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 11:06:04,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 11:06:04,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 11:06:04,160 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 11:06:04,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:06:04" (1/1) ... [2022-04-06 11:06:04,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 11:06:04,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:06:04,190 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) [2022-04-06 11:06:04,191 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 [2022-04-06 11:06:04,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 11:06:04,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 11:06:04,212 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 11:06:04,212 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 11:06:04,212 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 11:06:04,212 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 11:06:04,212 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 11:06:04,213 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 11:06:04,213 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 11:06:04,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 11:06:04,213 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-06 11:06:04,213 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 11:06:04,213 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 11:06:04,213 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 11:06:04,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 11:06:04,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 11:06:04,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 11:06:04,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 11:06:04,213 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 11:06:04,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 11:06:04,260 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 11:06:04,261 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 11:06:04,376 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 11:06:04,380 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 11:06:04,380 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 11:06:04,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:06:04 BoogieIcfgContainer [2022-04-06 11:06:04,382 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 11:06:04,382 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 11:06:04,382 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 11:06:04,395 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 11:06:04,401 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:06:04" (1/1) ... [2022-04-06 11:06:04,402 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-06 11:06:04,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 11:06:04 BasicIcfg [2022-04-06 11:06:04,426 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 11:06:04,427 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 11:06:04,427 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 11:06:04,441 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 11:06:04,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 11:06:03" (1/4) ... [2022-04-06 11:06:04,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79db503f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 11:06:04, skipping insertion in model container [2022-04-06 11:06:04,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:06:04" (2/4) ... [2022-04-06 11:06:04,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79db503f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 11:06:04, skipping insertion in model container [2022-04-06 11:06:04,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:06:04" (3/4) ... [2022-04-06 11:06:04,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79db503f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 11:06:04, skipping insertion in model container [2022-04-06 11:06:04,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 11:06:04" (4/4) ... [2022-04-06 11:06:04,444 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_unwindbound20.cqvasr [2022-04-06 11:06:04,447 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-06 11:06:04,447 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 11:06:04,476 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 11:06:04,485 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 11:06:04,485 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 11:06:04,495 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 11:06:04,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 11:06:04,498 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:06:04,499 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:06:04,499 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:06:04,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:06:04,503 INFO L85 PathProgramCache]: Analyzing trace with hash -460462115, now seen corresponding path program 1 times [2022-04-06 11:06:04,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:06:04,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565403222] [2022-04-06 11:06:04,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:06:04,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:06:04,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:06:04,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 11:06:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:06:04,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 11:06:04,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:06:04,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 11:06:04,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:06:04,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565403222] [2022-04-06 11:06:04,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565403222] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:06:04,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:06:04,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 11:06:04,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931256672] [2022-04-06 11:06:04,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:06:04,638 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 11:06:04,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:06:04,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 11:06:04,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 11:06:04,657 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 11:06:06,725 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 11:06:06,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:06:06,968 INFO L93 Difference]: Finished difference Result 70 states and 111 transitions. [2022-04-06 11:06:06,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 11:06:06,971 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-04-06 11:06:06,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:06:06,976 INFO L225 Difference]: With dead ends: 70 [2022-04-06 11:06:06,976 INFO L226 Difference]: Without dead ends: 35 [2022-04-06 11:06:06,978 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 11:06:06,980 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-04-06 11:06:06,981 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 53 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 25 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-04-06 11:06:06,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-06 11:06:07,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-04-06 11:06:07,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 11:06:07,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 46 transitions. [2022-04-06 11:06:07,020 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 46 transitions. Word has length 18 [2022-04-06 11:06:07,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:06:07,020 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 46 transitions. [2022-04-06 11:06:07,020 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 11:06:07,021 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2022-04-06 11:06:07,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 11:06:07,021 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:06:07,022 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:06:07,022 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 11:06:07,022 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:06:07,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:06:07,024 INFO L85 PathProgramCache]: Analyzing trace with hash -889932734, now seen corresponding path program 1 times [2022-04-06 11:06:07,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:06:07,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942753753] [2022-04-06 11:06:07,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:06:07,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:06:07,037 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:06:07,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1506598414] [2022-04-06 11:06:07,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:06:07,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:06:07,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:06:07,039 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) [2022-04-06 11:06:07,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 11:06:07,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:06:07,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 11:06:07,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:06:07,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 11:06:07,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:06:07,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:06:07,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942753753] [2022-04-06 11:06:07,193 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:06:07,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506598414] [2022-04-06 11:06:07,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506598414] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:06:07,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:06:07,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 11:06:07,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727546222] [2022-04-06 11:06:07,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:06:07,195 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 11:06:07,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:06:07,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 11:06:07,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 11:06:07,195 INFO L87 Difference]: Start difference. First operand 34 states and 46 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 11:06:07,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:06:07,214 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2022-04-06 11:06:07,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 11:06:07,216 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-04-06 11:06:07,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:06:07,217 INFO L225 Difference]: With dead ends: 55 [2022-04-06 11:06:07,217 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 11:06:07,217 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 11:06:07,218 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:06:07,218 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 119 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:06:07,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 11:06:07,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-04-06 11:06:07,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 11:06:07,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2022-04-06 11:06:07,224 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 20 [2022-04-06 11:06:07,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:06:07,225 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2022-04-06 11:06:07,225 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 11:06:07,225 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2022-04-06 11:06:07,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 11:06:07,225 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:06:07,225 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:06:07,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 11:06:07,439 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:06:07,440 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:06:07,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:06:07,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1699853977, now seen corresponding path program 1 times [2022-04-06 11:06:07,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:06:07,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762496816] [2022-04-06 11:06:07,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:06:07,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:06:07,462 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:06:07,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [653963961] [2022-04-06 11:06:07,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:06:07,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:06:07,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:06:07,469 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) [2022-04-06 11:06:07,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 11:06:07,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:06:07,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 11:06:07,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:06:07,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 11:06:07,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:06:07,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:06:07,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762496816] [2022-04-06 11:06:07,567 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:06:07,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653963961] [2022-04-06 11:06:07,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653963961] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:06:07,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:06:07,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 11:06:07,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124835895] [2022-04-06 11:06:07,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:06:07,568 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 11:06:07,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:06:07,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 11:06:07,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 11:06:07,568 INFO L87 Difference]: Start difference. First operand 36 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 11:06:07,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:06:07,592 INFO L93 Difference]: Finished difference Result 49 states and 64 transitions. [2022-04-06 11:06:07,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 11:06:07,594 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-04-06 11:06:07,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:06:07,595 INFO L225 Difference]: With dead ends: 49 [2022-04-06 11:06:07,595 INFO L226 Difference]: Without dead ends: 40 [2022-04-06 11:06:07,596 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 11:06:07,596 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:06:07,597 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 149 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:06:07,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-04-06 11:06:07,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-04-06 11:06:07,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 11:06:07,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2022-04-06 11:06:07,602 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 21 [2022-04-06 11:06:07,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:06:07,602 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2022-04-06 11:06:07,603 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 11:06:07,603 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2022-04-06 11:06:07,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 11:06:07,603 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:06:07,603 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:06:07,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 11:06:07,822 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-06 11:06:07,823 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:06:07,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:06:07,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1700986035, now seen corresponding path program 1 times [2022-04-06 11:06:07,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:06:07,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925577034] [2022-04-06 11:06:07,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:06:07,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:06:07,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:06:08,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 11:06:08,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:06:08,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 11:06:08,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:06:08,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 11:06:08,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:06:08,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925577034] [2022-04-06 11:06:08,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925577034] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:06:08,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:06:08,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 11:06:08,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445436678] [2022-04-06 11:06:08,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:06:08,037 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 11:06:08,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:06:08,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 11:06:08,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-04-06 11:06:08,037 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 11:06:10,782 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:06:15,890 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:06:15,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:06:15,987 INFO L93 Difference]: Finished difference Result 72 states and 104 transitions. [2022-04-06 11:06:15,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 11:06:15,988 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2022-04-06 11:06:15,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:06:15,989 INFO L225 Difference]: With dead ends: 72 [2022-04-06 11:06:15,989 INFO L226 Difference]: Without dead ends: 51 [2022-04-06 11:06:15,989 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-04-06 11:06:15,990 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 24 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 40 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-04-06 11:06:15,992 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 98 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 200 Invalid, 2 Unknown, 0 Unchecked, 7.9s Time] [2022-04-06 11:06:15,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-06 11:06:16,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-04-06 11:06:16,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 11:06:16,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2022-04-06 11:06:16,001 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 21 [2022-04-06 11:06:16,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:06:16,001 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2022-04-06 11:06:16,001 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 11:06:16,002 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2022-04-06 11:06:16,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 11:06:16,002 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:06:16,002 INFO L499 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] [2022-04-06 11:06:16,002 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 11:06:16,002 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:06:16,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:06:16,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1908885951, now seen corresponding path program 1 times [2022-04-06 11:06:16,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:06:16,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290677898] [2022-04-06 11:06:16,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:06:16,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:06:16,010 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:06:16,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [244867174] [2022-04-06 11:06:16,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:06:16,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:06:16,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:06:16,011 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) [2022-04-06 11:06:16,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 11:06:16,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:06:16,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 11:06:16,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:06:16,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 11:06:16,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:06:16,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 11:06:16,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:06:16,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290677898] [2022-04-06 11:06:16,153 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:06:16,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244867174] [2022-04-06 11:06:16,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244867174] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:06:16,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:06:16,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-06 11:06:16,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252273489] [2022-04-06 11:06:16,154 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:06:16,154 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 11:06:16,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:06:16,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 11:06:16,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-06 11:06:16,155 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-06 11:06:19,659 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:06:22,363 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:06:25,071 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 11:06:25,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:06:25,111 INFO L93 Difference]: Finished difference Result 104 states and 146 transitions. [2022-04-06 11:06:25,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 11:06:25,111 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 23 [2022-04-06 11:06:25,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:06:25,112 INFO L225 Difference]: With dead ends: 104 [2022-04-06 11:06:25,112 INFO L226 Difference]: Without dead ends: 85 [2022-04-06 11:06:25,113 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-04-06 11:06:25,114 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 59 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 11 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-04-06 11:06:25,114 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 286 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 87 Invalid, 3 Unknown, 0 Unchecked, 8.9s Time] [2022-04-06 11:06:25,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-04-06 11:06:25,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 63. [2022-04-06 11:06:25,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 38 states have (on average 1.263157894736842) internal successors, (48), 40 states have internal predecessors, (48), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 11:06:25,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 83 transitions. [2022-04-06 11:06:25,127 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 83 transitions. Word has length 23 [2022-04-06 11:06:25,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:06:25,127 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 83 transitions. [2022-04-06 11:06:25,127 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-06 11:06:25,127 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 83 transitions. [2022-04-06 11:06:25,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 11:06:25,128 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:06:25,128 INFO L499 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] [2022-04-06 11:06:25,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-04-06 11:06:25,344 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:06:25,345 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:06:25,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:06:25,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1731080004, now seen corresponding path program 1 times [2022-04-06 11:06:25,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:06:25,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167074356] [2022-04-06 11:06:25,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:06:25,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:06:25,356 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:06:25,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [978459374] [2022-04-06 11:06:25,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:06:25,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:06:25,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:06:25,358 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) [2022-04-06 11:06:25,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 11:06:25,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:06:25,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 11:06:25,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:06:25,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 11:06:25,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:06:25,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 11:06:25,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:06:25,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167074356] [2022-04-06 11:06:25,513 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:06:25,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978459374] [2022-04-06 11:06:25,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978459374] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:06:25,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:06:25,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-04-06 11:06:25,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140940620] [2022-04-06 11:06:25,513 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:06:25,514 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 11:06:25,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:06:25,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 11:06:25,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-06 11:06:25,514 INFO L87 Difference]: Start difference. First operand 63 states and 83 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-06 11:06:27,595 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 11:06:29,779 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 11:06:31,780 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 11:06:34,044 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:06:36,769 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 11:06:38,823 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 11:06:41,071 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 11:06:43,836 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 [] [2022-04-06 11:06:43,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:06:43,963 INFO L93 Difference]: Finished difference Result 138 states and 192 transitions. [2022-04-06 11:06:43,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 11:06:43,964 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 24 [2022-04-06 11:06:43,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:06:43,965 INFO L225 Difference]: With dead ends: 138 [2022-04-06 11:06:43,965 INFO L226 Difference]: Without dead ends: 129 [2022-04-06 11:06:43,965 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-04-06 11:06:43,966 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 154 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 78 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.4s IncrementalHoareTripleChecker+Time [2022-04-06 11:06:43,967 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 256 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 112 Invalid, 8 Unknown, 0 Unchecked, 18.4s Time] [2022-04-06 11:06:43,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-04-06 11:06:43,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 120. [2022-04-06 11:06:43,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 65 states have (on average 1.3384615384615384) internal successors, (87), 70 states have internal predecessors, (87), 46 states have call successors, (46), 9 states have call predecessors, (46), 8 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-04-06 11:06:43,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 173 transitions. [2022-04-06 11:06:43,980 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 173 transitions. Word has length 24 [2022-04-06 11:06:43,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:06:43,980 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 173 transitions. [2022-04-06 11:06:43,981 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-06 11:06:43,981 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 173 transitions. [2022-04-06 11:06:43,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 11:06:43,981 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:06:43,981 INFO L499 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] [2022-04-06 11:06:43,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-04-06 11:06:44,197 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:06:44,198 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:06:44,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:06:44,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1729947946, now seen corresponding path program 1 times [2022-04-06 11:06:44,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:06:44,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43539934] [2022-04-06 11:06:44,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:06:44,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:06:44,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:06:44,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 11:06:44,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:06:44,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 11:06:44,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:06:44,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 11:06:44,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:06:44,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43539934] [2022-04-06 11:06:44,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43539934] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 11:06:44,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685834651] [2022-04-06 11:06:44,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:06:44,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:06:44,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:06:44,382 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) [2022-04-06 11:06:44,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 11:06:44,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:06:44,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 11:06:44,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:06:44,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 11:06:44,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:06:44,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 11:06:44,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685834651] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:06:44,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 11:06:44,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-04-06 11:06:44,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123852822] [2022-04-06 11:06:44,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 11:06:44,678 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 11:06:44,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:06:44,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 11:06:44,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-04-06 11:06:44,679 INFO L87 Difference]: Start difference. First operand 120 states and 173 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 11:06:50,387 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 11:06:56,816 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:06:59,776 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 11:07:03,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:07:03,413 INFO L93 Difference]: Finished difference Result 194 states and 284 transitions. [2022-04-06 11:07:03,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 11:07:03,413 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-04-06 11:07:03,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:07:03,414 INFO L225 Difference]: With dead ends: 194 [2022-04-06 11:07:03,415 INFO L226 Difference]: Without dead ends: 177 [2022-04-06 11:07:03,415 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-04-06 11:07:03,416 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 46 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 121 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.6s IncrementalHoareTripleChecker+Time [2022-04-06 11:07:03,416 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 189 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 610 Invalid, 3 Unknown, 0 Unchecked, 18.6s Time] [2022-04-06 11:07:03,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-04-06 11:07:03,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 170. [2022-04-06 11:07:03,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 92 states have (on average 1.2826086956521738) internal successors, (118), 100 states have internal predecessors, (118), 65 states have call successors, (65), 13 states have call predecessors, (65), 12 states have return successors, (57), 56 states have call predecessors, (57), 57 states have call successors, (57) [2022-04-06 11:07:03,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 240 transitions. [2022-04-06 11:07:03,437 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 240 transitions. Word has length 24 [2022-04-06 11:07:03,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:07:03,437 INFO L478 AbstractCegarLoop]: Abstraction has 170 states and 240 transitions. [2022-04-06 11:07:03,437 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 11:07:03,437 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 240 transitions. [2022-04-06 11:07:03,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 11:07:03,438 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:07:03,438 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:07:03,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 11:07:03,638 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:07:03,639 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:07:03,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:07:03,639 INFO L85 PathProgramCache]: Analyzing trace with hash -2026335537, now seen corresponding path program 1 times [2022-04-06 11:07:03,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:07:03,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739208890] [2022-04-06 11:07:03,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:07:03,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:07:03,654 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:07:03,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [381656401] [2022-04-06 11:07:03,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:07:03,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:07:03,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:07:03,659 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) [2022-04-06 11:07:03,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 11:07:03,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:07:03,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 11:07:03,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:07:03,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 11:07:03,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:07:03,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:07:03,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739208890] [2022-04-06 11:07:03,850 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:07:03,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381656401] [2022-04-06 11:07:03,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381656401] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:07:03,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:07:03,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 11:07:03,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832582879] [2022-04-06 11:07:03,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:07:03,852 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 11:07:03,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:07:03,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 11:07:03,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 11:07:03,853 INFO L87 Difference]: Start difference. First operand 170 states and 240 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 11:07:04,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:07:04,667 INFO L93 Difference]: Finished difference Result 176 states and 244 transitions. [2022-04-06 11:07:04,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 11:07:04,667 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2022-04-06 11:07:04,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:07:04,669 INFO L225 Difference]: With dead ends: 176 [2022-04-06 11:07:04,669 INFO L226 Difference]: Without dead ends: 152 [2022-04-06 11:07:04,670 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 11:07:04,670 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 6 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 11:07:04,670 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 154 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 11:07:04,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-04-06 11:07:04,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-04-06 11:07:04,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 83 states have (on average 1.2891566265060241) internal successors, (107), 90 states have internal predecessors, (107), 58 states have call successors, (58), 11 states have call predecessors, (58), 10 states have return successors, (51), 50 states have call predecessors, (51), 51 states have call successors, (51) [2022-04-06 11:07:04,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 216 transitions. [2022-04-06 11:07:04,692 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 216 transitions. Word has length 31 [2022-04-06 11:07:04,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:07:04,692 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 216 transitions. [2022-04-06 11:07:04,692 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 11:07:04,692 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 216 transitions. [2022-04-06 11:07:04,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 11:07:04,693 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:07:04,693 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:07:04,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-04-06 11:07:04,898 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:07:04,899 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:07:04,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:07:04,899 INFO L85 PathProgramCache]: Analyzing trace with hash -266035918, now seen corresponding path program 1 times [2022-04-06 11:07:04,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:07:04,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360565632] [2022-04-06 11:07:04,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:07:04,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:07:04,929 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:07:04,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113366472] [2022-04-06 11:07:04,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:07:04,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:07:04,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:07:04,931 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) [2022-04-06 11:07:04,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 11:07:04,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:07:04,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 11:07:04,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:07:05,083 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-06 11:07:05,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:07:05,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:07:05,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360565632] [2022-04-06 11:07:05,084 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:07:05,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113366472] [2022-04-06 11:07:05,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113366472] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:07:05,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:07:05,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 11:07:05,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569545892] [2022-04-06 11:07:05,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:07:05,085 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 11:07:05,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:07:05,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 11:07:05,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 11:07:05,086 INFO L87 Difference]: Start difference. First operand 152 states and 216 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 11:07:05,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:07:05,543 INFO L93 Difference]: Finished difference Result 182 states and 241 transitions. [2022-04-06 11:07:05,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 11:07:05,544 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-04-06 11:07:05,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:07:05,545 INFO L225 Difference]: With dead ends: 182 [2022-04-06 11:07:05,545 INFO L226 Difference]: Without dead ends: 177 [2022-04-06 11:07:05,545 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 11:07:05,546 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 8 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 11:07:05,546 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 156 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 11:07:05,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-04-06 11:07:05,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 170. [2022-04-06 11:07:05,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 97 states have (on average 1.1649484536082475) internal successors, (113), 101 states have internal predecessors, (113), 55 states have call successors, (55), 18 states have call predecessors, (55), 17 states have return successors, (51), 50 states have call predecessors, (51), 51 states have call successors, (51) [2022-04-06 11:07:05,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 219 transitions. [2022-04-06 11:07:05,568 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 219 transitions. Word has length 34 [2022-04-06 11:07:05,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:07:05,569 INFO L478 AbstractCegarLoop]: Abstraction has 170 states and 219 transitions. [2022-04-06 11:07:05,569 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 11:07:05,569 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 219 transitions. [2022-04-06 11:07:05,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 11:07:05,572 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:07:05,573 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:07:05,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 11:07:05,776 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:07:05,777 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:07:05,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:07:05,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1209382940, now seen corresponding path program 1 times [2022-04-06 11:07:05,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:07:05,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338419093] [2022-04-06 11:07:05,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:07:05,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:07:05,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:07:05,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 11:07:05,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:07:05,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 11:07:05,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:07:05,876 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 11:07:05,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:07:05,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338419093] [2022-04-06 11:07:05,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338419093] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 11:07:05,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696250180] [2022-04-06 11:07:05,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:07:05,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:07:05,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:07:05,877 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:07:05,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 11:07:05,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:07:05,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 11:07:05,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:07:05,972 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 11:07:05,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:07:06,098 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 11:07:06,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696250180] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:07:06,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 11:07:06,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-04-06 11:07:06,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353274031] [2022-04-06 11:07:06,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 11:07:06,099 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 11:07:06,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:07:06,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 11:07:06,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-04-06 11:07:06,100 INFO L87 Difference]: Start difference. First operand 170 states and 219 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 11:07:07,707 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:07:09,743 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:07:11,786 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 11:07:13,791 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 11:07:15,796 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 11:07:17,830 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:07:19,875 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:07:21,882 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 11:07:25,415 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 11:07:27,421 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 11:07:29,428 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 11:07:31,857 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:07:33,291 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:07:35,301 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:07:37,893 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 11:07:39,925 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:07:42,045 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:07:45,103 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 11:07:50,082 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 11:07:52,811 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 11:07:55,829 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 11:07:58,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:07:58,476 INFO L93 Difference]: Finished difference Result 356 states and 453 transitions. [2022-04-06 11:07:58,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 11:07:58,476 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 32 [2022-04-06 11:07:58,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:07:58,478 INFO L225 Difference]: With dead ends: 356 [2022-04-06 11:07:58,478 INFO L226 Difference]: Without dead ends: 316 [2022-04-06 11:07:58,479 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=716, Unknown=0, NotChecked=0, Total=992 [2022-04-06 11:07:58,479 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 187 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 123 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:07:58,479 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 214 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 473 Invalid, 18 Unknown, 0 Unchecked, 52.1s Time] [2022-04-06 11:07:58,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-04-06 11:07:58,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 274. [2022-04-06 11:07:58,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 161 states have (on average 1.1801242236024845) internal successors, (190), 170 states have internal predecessors, (190), 84 states have call successors, (84), 29 states have call predecessors, (84), 28 states have return successors, (78), 74 states have call predecessors, (78), 78 states have call successors, (78) [2022-04-06 11:07:58,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 352 transitions. [2022-04-06 11:07:58,497 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 352 transitions. Word has length 32 [2022-04-06 11:07:58,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:07:58,497 INFO L478 AbstractCegarLoop]: Abstraction has 274 states and 352 transitions. [2022-04-06 11:07:58,497 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 11:07:58,497 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 352 transitions. [2022-04-06 11:07:58,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 11:07:58,498 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:07:58,498 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:07:58,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 11:07:58,707 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 11:07:58,708 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:07:58,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:07:58,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1556551492, now seen corresponding path program 2 times [2022-04-06 11:07:58,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:07:58,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764233065] [2022-04-06 11:07:58,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:07:58,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:07:58,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:07:58,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 11:07:58,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:07:58,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 11:07:58,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:07:58,885 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 11:07:58,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:07:58,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764233065] [2022-04-06 11:07:58,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764233065] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 11:07:58,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389474960] [2022-04-06 11:07:58,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 11:07:58,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:07:58,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:07:58,887 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:07:58,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 11:07:58,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 11:07:58,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 11:07:58,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 11:07:58,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:07:59,018 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-04-06 11:07:59,018 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:07:59,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389474960] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:07:59,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 11:07:59,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15] total 18 [2022-04-06 11:07:59,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567300687] [2022-04-06 11:07:59,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:07:59,019 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 11:07:59,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:07:59,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 11:07:59,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-04-06 11:07:59,020 INFO L87 Difference]: Start difference. First operand 274 states and 352 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 11:07:59,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:07:59,061 INFO L93 Difference]: Finished difference Result 311 states and 401 transitions. [2022-04-06 11:07:59,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 11:07:59,061 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2022-04-06 11:07:59,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:07:59,063 INFO L225 Difference]: With dead ends: 311 [2022-04-06 11:07:59,063 INFO L226 Difference]: Without dead ends: 271 [2022-04-06 11:07:59,063 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-04-06 11:07:59,063 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:07:59,064 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 167 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:07:59,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-04-06 11:07:59,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 263. [2022-04-06 11:07:59,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 151 states have (on average 1.1721854304635762) internal successors, (177), 159 states have internal predecessors, (177), 83 states have call successors, (83), 29 states have call predecessors, (83), 28 states have return successors, (77), 74 states have call predecessors, (77), 77 states have call successors, (77) [2022-04-06 11:07:59,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 337 transitions. [2022-04-06 11:07:59,078 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 337 transitions. Word has length 50 [2022-04-06 11:07:59,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:07:59,079 INFO L478 AbstractCegarLoop]: Abstraction has 263 states and 337 transitions. [2022-04-06 11:07:59,079 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 11:07:59,079 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 337 transitions. [2022-04-06 11:07:59,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 11:07:59,080 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:07:59,080 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:07:59,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 11:07:59,295 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:07:59,295 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:07:59,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:07:59,296 INFO L85 PathProgramCache]: Analyzing trace with hash -926681017, now seen corresponding path program 1 times [2022-04-06 11:07:59,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:07:59,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458966162] [2022-04-06 11:07:59,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:07:59,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:07:59,301 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:07:59,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1404558117] [2022-04-06 11:07:59,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:07:59,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:07:59,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:07:59,303 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:07:59,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process