/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/hard-u_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 10:45:41,823 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 10:45:41,831 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 10:45:41,867 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 10:45:41,868 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 10:45:41,869 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 10:45:41,869 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 10:45:41,871 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 10:45:41,881 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 10:45:41,886 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 10:45:41,887 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 10:45:41,889 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 10:45:41,889 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 10:45:41,891 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 10:45:41,892 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 10:45:41,892 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 10:45:41,893 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 10:45:41,893 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 10:45:41,894 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 10:45:41,895 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 10:45:41,899 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 10:45:41,901 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 10:45:41,902 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 10:45:41,904 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 10:45:41,905 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 10:45:41,912 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 10:45:41,912 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 10:45:41,912 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 10:45:41,913 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 10:45:41,913 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 10:45:41,914 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-20 10:45:41,914 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-20 10:45:41,916 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-20 10:45:41,916 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-20 10:45:41,916 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-20 10:45:41,919 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-20 10:45:41,919 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-20 10:45:41,920 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-20 10:45:41,920 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-20 10:45:41,920 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 10:45:41,921 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 10:45:41,923 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 10:45:41,923 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 10:45:41,947 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 10:45:41,947 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 10:45:41,949 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 10:45:41,949 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 10:45:41,950 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 10:45:41,950 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 10:45:41,950 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 10:45:41,950 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 10:45:41,950 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 10:45:41,951 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 10:45:41,951 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 10:45:41,951 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 10:45:41,951 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 10:45:41,951 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 10:45:41,952 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 10:45:41,952 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 10:45:41,952 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 10:45:41,952 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 10:45:41,952 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 10:45:41,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 10:45:41,952 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 10:45:41,952 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 10:45:41,953 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 10:45:41,953 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 10:45:41,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 10:45:41,953 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 10:45:41,953 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 10:45:41,953 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 10:45:41,954 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 10:45:41,954 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 10:45:42,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 10:45:42,183 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 10:45:42,185 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 10:45:42,186 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 10:45:42,187 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 10:45:42,187 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound20.c [2022-03-20 10:45:42,236 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd5f781e5/7755c5f8d3984548ae84383ccf729470/FLAG04c61bed3 [2022-03-20 10:45:42,632 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 10:45:42,632 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound20.c [2022-03-20 10:45:42,639 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd5f781e5/7755c5f8d3984548ae84383ccf729470/FLAG04c61bed3 [2022-03-20 10:45:43,047 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd5f781e5/7755c5f8d3984548ae84383ccf729470 [2022-03-20 10:45:43,049 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 10:45:43,050 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 10:45:43,051 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 10:45:43,051 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 10:45:43,053 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 10:45:43,053 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 10:45:43" (1/1) ... [2022-03-20 10:45:43,054 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b1cd841 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:45:43, skipping insertion in model container [2022-03-20 10:45:43,054 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 10:45:43" (1/1) ... [2022-03-20 10:45:43,059 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 10:45:43,071 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 10:45:43,194 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/hard-u_unwindbound20.c[537,550] [2022-03-20 10:45:43,204 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 10:45:43,209 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 10:45:43,216 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/hard-u_unwindbound20.c[537,550] [2022-03-20 10:45:43,220 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 10:45:43,229 INFO L208 MainTranslator]: Completed translation [2022-03-20 10:45:43,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:45:43 WrapperNode [2022-03-20 10:45:43,229 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 10:45:43,230 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 10:45:43,230 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 10:45:43,231 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 10:45:43,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:45:43" (1/1) ... [2022-03-20 10:45:43,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:45:43" (1/1) ... [2022-03-20 10:45:43,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:45:43" (1/1) ... [2022-03-20 10:45:43,256 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:45:43" (1/1) ... [2022-03-20 10:45:43,259 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:45:43" (1/1) ... [2022-03-20 10:45:43,262 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:45:43" (1/1) ... [2022-03-20 10:45:43,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:45:43" (1/1) ... [2022-03-20 10:45:43,263 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 10:45:43,264 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 10:45:43,264 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 10:45:43,264 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 10:45:43,268 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:45:43" (1/1) ... [2022-03-20 10:45:43,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 10:45:43,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:45:43,314 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) [2022-03-20 10:45:43,319 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 [2022-03-20 10:45:43,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 10:45:43,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 10:45:43,351 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 10:45:43,351 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 10:45:43,351 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 10:45:43,351 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 10:45:43,351 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 10:45:43,351 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 10:45:43,351 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 10:45:43,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 10:45:43,351 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-20 10:45:43,351 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 10:45:43,351 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 10:45:43,351 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 10:45:43,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 10:45:43,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 10:45:43,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 10:45:43,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 10:45:43,352 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 10:45:43,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 10:45:43,391 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 10:45:43,392 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 10:45:43,528 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 10:45:43,532 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 10:45:43,532 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 10:45:43,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 10:45:43 BoogieIcfgContainer [2022-03-20 10:45:43,533 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 10:45:43,534 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 10:45:43,534 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 10:45:43,537 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 10:45:43,539 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 10:45:43" (1/1) ... [2022-03-20 10:45:43,540 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 10:45:43,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 10:45:43 BasicIcfg [2022-03-20 10:45:43,560 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 10:45:43,561 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 10:45:43,561 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 10:45:43,580 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 10:45:43,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 10:45:43" (1/4) ... [2022-03-20 10:45:43,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1901fb9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 10:45:43, skipping insertion in model container [2022-03-20 10:45:43,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:45:43" (2/4) ... [2022-03-20 10:45:43,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1901fb9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 10:45:43, skipping insertion in model container [2022-03-20 10:45:43,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 10:45:43" (3/4) ... [2022-03-20 10:45:43,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1901fb9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 10:45:43, skipping insertion in model container [2022-03-20 10:45:43,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 10:45:43" (4/4) ... [2022-03-20 10:45:43,582 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound20.cqvasr [2022-03-20 10:45:43,586 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 10:45:43,586 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 10:45:43,640 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 10:45:43,647 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 [2022-03-20 10:45:43,648 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 10:45:43,662 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 10:45:43,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 10:45:43,667 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:45:43,668 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:45:43,674 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:45:43,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:45:43,678 INFO L85 PathProgramCache]: Analyzing trace with hash 79654685, now seen corresponding path program 1 times [2022-03-20 10:45:43,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:45:43,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836678711] [2022-03-20 10:45:43,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:45:43,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:45:43,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:45:43,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 10:45:43,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:45:43,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 10:45:43,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:45:43,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 10:45:43,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:45:43,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836678711] [2022-03-20 10:45:43,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836678711] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:45:43,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:45:43,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 10:45:43,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107732514] [2022-03-20 10:45:43,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:45:43,866 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 10:45:43,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:45:43,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 10:45:43,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 10:45:43,889 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) 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) [2022-03-20 10:45:43,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:45:43,979 INFO L93 Difference]: Finished difference Result 66 states and 101 transitions. [2022-03-20 10:45:43,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 10:45:43,981 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 [2022-03-20 10:45:43,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:45:43,987 INFO L225 Difference]: With dead ends: 66 [2022-03-20 10:45:43,987 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 10:45:43,989 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 [2022-03-20 10:45:43,994 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:45:43,994 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:45:44,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 10:45:44,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-03-20 10:45:44,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 10:45:44,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-03-20 10:45:44,025 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2022-03-20 10:45:44,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:45:44,025 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-03-20 10:45:44,025 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) [2022-03-20 10:45:44,025 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-03-20 10:45:44,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 10:45:44,026 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:45:44,026 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:45:44,027 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 10:45:44,027 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:45:44,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:45:44,028 INFO L85 PathProgramCache]: Analyzing trace with hash -85369733, now seen corresponding path program 1 times [2022-03-20 10:45:44,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:45:44,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726157210] [2022-03-20 10:45:44,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:45:44,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:45:44,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:45:44,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 10:45:44,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:45:44,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 10:45:44,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:45:44,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 10:45:44,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:45:44,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726157210] [2022-03-20 10:45:44,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726157210] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:45:44,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:45:44,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 10:45:44,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207990314] [2022-03-20 10:45:44,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:45:44,162 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 10:45:44,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:45:44,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 10:45:44,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 10:45:44,164 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-03-20 10:45:44,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:45:44,302 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2022-03-20 10:45:44,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 10:45:44,302 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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 18 [2022-03-20 10:45:44,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:45:44,303 INFO L225 Difference]: With dead ends: 47 [2022-03-20 10:45:44,304 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 10:45:44,304 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 10:45:44,305 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:45:44,305 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 96 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:45:44,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 10:45:44,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2022-03-20 10:45:44,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 10:45:44,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-03-20 10:45:44,323 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2022-03-20 10:45:44,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:45:44,324 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-03-20 10:45:44,324 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-03-20 10:45:44,324 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-03-20 10:45:44,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 10:45:44,325 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:45:44,325 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] [2022-03-20 10:45:44,326 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 10:45:44,326 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:45:44,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:45:44,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1527809342, now seen corresponding path program 1 times [2022-03-20 10:45:44,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:45:44,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028665005] [2022-03-20 10:45:44,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:45:44,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:45:44,340 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:45:44,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1333666759] [2022-03-20 10:45:44,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:45:44,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:45:44,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:45:44,342 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) [2022-03-20 10:45:44,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 10:45:44,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:45:44,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 10:45:44,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:45:44,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 10:45:44,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:45:44,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:45:44,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028665005] [2022-03-20 10:45:44,441 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:45:44,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333666759] [2022-03-20 10:45:44,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333666759] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:45:44,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:45:44,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 10:45:44,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730472218] [2022-03-20 10:45:44,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:45:44,443 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 10:45:44,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:45:44,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 10:45:44,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 10:45:44,443 INFO L87 Difference]: Start difference. First operand 36 states and 45 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) [2022-03-20 10:45:44,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:45:44,452 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2022-03-20 10:45:44,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 10:45:44,453 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 [2022-03-20 10:45:44,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:45:44,453 INFO L225 Difference]: With dead ends: 52 [2022-03-20 10:45:44,453 INFO L226 Difference]: Without dead ends: 38 [2022-03-20 10:45:44,454 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 [2022-03-20 10:45:44,455 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 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 [2022-03-20 10:45:44,455 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:45:44,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-20 10:45:44,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-03-20 10:45:44,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 10:45:44,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2022-03-20 10:45:44,460 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2022-03-20 10:45:44,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:45:44,460 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2022-03-20 10:45:44,460 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) [2022-03-20 10:45:44,460 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2022-03-20 10:45:44,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 10:45:44,460 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:45:44,461 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] [2022-03-20 10:45:44,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 10:45:44,691 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:45:44,692 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:45:44,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:45:44,692 INFO L85 PathProgramCache]: Analyzing trace with hash 2128444854, now seen corresponding path program 1 times [2022-03-20 10:45:44,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:45:44,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983523937] [2022-03-20 10:45:44,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:45:44,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:45:44,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:45:44,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 10:45:44,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:45:44,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 10:45:44,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:45:44,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-20 10:45:44,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:45:44,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 10:45:44,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:45:44,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983523937] [2022-03-20 10:45:44,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983523937] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:45:44,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:45:44,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 10:45:44,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902012933] [2022-03-20 10:45:44,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:45:44,761 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 10:45:44,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:45:44,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 10:45:44,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 10:45:44,761 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 10:45:44,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:45:44,867 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-03-20 10:45:44,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 10:45:44,867 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-20 10:45:44,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:45:44,868 INFO L225 Difference]: With dead ends: 52 [2022-03-20 10:45:44,868 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 10:45:44,868 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 10:45:44,869 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:45:44,869 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 89 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:45:44,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 10:45:44,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2022-03-20 10:45:44,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 10:45:44,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-03-20 10:45:44,875 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2022-03-20 10:45:44,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:45:44,875 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-03-20 10:45:44,875 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 10:45:44,875 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-03-20 10:45:44,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 10:45:44,876 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:45:44,876 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] [2022-03-20 10:45:44,876 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 10:45:44,876 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:45:44,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:45:44,876 INFO L85 PathProgramCache]: Analyzing trace with hash 135546551, now seen corresponding path program 1 times [2022-03-20 10:45:44,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:45:44,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603118634] [2022-03-20 10:45:44,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:45:44,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:45:44,884 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:45:44,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1404269690] [2022-03-20 10:45:44,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:45:44,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:45:44,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:45:44,886 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) [2022-03-20 10:45:44,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 10:45:44,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:45:44,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 10:45:44,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:45:44,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:45:44,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:45:44,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:45:44,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603118634] [2022-03-20 10:45:44,986 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:45:44,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404269690] [2022-03-20 10:45:44,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404269690] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:45:44,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:45:44,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 10:45:44,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719799737] [2022-03-20 10:45:44,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:45:44,987 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 10:45:44,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:45:44,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 10:45:44,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:45:44,988 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2022-03-20 10:45:47,028 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 [] [2022-03-20 10:45:47,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:45:47,175 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2022-03-20 10:45:47,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 10:45:47,176 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), 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 28 [2022-03-20 10:45:47,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:45:47,177 INFO L225 Difference]: With dead ends: 59 [2022-03-20 10:45:47,177 INFO L226 Difference]: Without dead ends: 56 [2022-03-20 10:45:47,177 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 10:45:47,178 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 10 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-20 10:45:47,178 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 151 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-03-20 10:45:47,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-20 10:45:47,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-03-20 10:45:47,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 10:45:47,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2022-03-20 10:45:47,184 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 28 [2022-03-20 10:45:47,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:45:47,184 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2022-03-20 10:45:47,185 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), 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) [2022-03-20 10:45:47,185 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2022-03-20 10:45:47,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 10:45:47,185 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:45:47,186 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:45:47,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-20 10:45:47,400 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:45:47,401 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:45:47,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:45:47,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1016025214, now seen corresponding path program 1 times [2022-03-20 10:45:47,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:45:47,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017311320] [2022-03-20 10:45:47,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:45:47,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:45:47,411 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:45:47,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1833596168] [2022-03-20 10:45:47,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:45:47,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:45:47,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:45:47,414 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) [2022-03-20 10:45:47,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 10:45:47,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:45:47,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 10:45:47,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:45:47,535 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 10:45:47,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:45:47,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:45:47,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017311320] [2022-03-20 10:45:47,536 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:45:47,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833596168] [2022-03-20 10:45:47,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833596168] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:45:47,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:45:47,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 10:45:47,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679666517] [2022-03-20 10:45:47,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:45:47,537 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 10:45:47,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:45:47,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 10:45:47,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:45:47,537 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 10:45:47,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:45:47,566 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2022-03-20 10:45:47,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 10:45:47,567 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), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2022-03-20 10:45:47,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:45:47,567 INFO L225 Difference]: With dead ends: 76 [2022-03-20 10:45:47,568 INFO L226 Difference]: Without dead ends: 69 [2022-03-20 10:45:47,568 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:45:47,568 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:45:47,568 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 117 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:45:47,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-20 10:45:47,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-03-20 10:45:47,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 44 states have internal predecessors, (50), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 10:45:47,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2022-03-20 10:45:47,574 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 36 [2022-03-20 10:45:47,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:45:47,574 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2022-03-20 10:45:47,574 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), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 10:45:47,574 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2022-03-20 10:45:47,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 10:45:47,575 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:45:47,575 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:45:47,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-20 10:45:47,799 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:45:47,799 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:45:47,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:45:47,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1017127481, now seen corresponding path program 1 times [2022-03-20 10:45:47,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:45:47,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631811123] [2022-03-20 10:45:47,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:45:47,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:45:47,808 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:45:47,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [413681931] [2022-03-20 10:45:47,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:45:47,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:45:47,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:45:47,828 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) [2022-03-20 10:45:47,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 10:45:47,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:45:47,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 10:45:47,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:45:48,038 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 10:45:48,039 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:45:48,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:45:48,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631811123] [2022-03-20 10:45:48,044 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:45:48,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413681931] [2022-03-20 10:45:48,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413681931] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:45:48,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:45:48,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 10:45:48,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181703003] [2022-03-20 10:45:48,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:45:48,045 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 10:45:48,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:45:48,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 10:45:48,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 10:45:48,045 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 10:45:48,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:45:48,223 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2022-03-20 10:45:48,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 10:45:48,224 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-03-20 10:45:48,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:45:48,225 INFO L225 Difference]: With dead ends: 82 [2022-03-20 10:45:48,225 INFO L226 Difference]: Without dead ends: 79 [2022-03-20 10:45:48,225 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 10:45:48,225 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 14 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:45:48,226 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 189 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:45:48,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-20 10:45:48,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-03-20 10:45:48,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 51 states have internal predecessors, (59), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 10:45:48,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2022-03-20 10:45:48,231 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 36 [2022-03-20 10:45:48,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:45:48,232 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2022-03-20 10:45:48,232 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 10:45:48,232 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2022-03-20 10:45:48,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 10:45:48,232 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:45:48,232 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:45:48,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 10:45:48,435 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:45:48,435 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:45:48,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:45:48,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1880362404, now seen corresponding path program 1 times [2022-03-20 10:45:48,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:45:48,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374574338] [2022-03-20 10:45:48,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:45:48,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:45:48,443 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:45:48,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2108601056] [2022-03-20 10:45:48,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:45:48,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:45:48,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:45:48,449 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) [2022-03-20 10:45:48,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 10:45:48,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:45:48,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 10:45:48,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:45:48,592 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 10:45:48,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:45:48,711 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 10:45:48,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:45:48,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374574338] [2022-03-20 10:45:48,711 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:45:48,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108601056] [2022-03-20 10:45:48,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108601056] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:45:48,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:45:48,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-20 10:45:48,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647409218] [2022-03-20 10:45:48,712 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:45:48,712 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 10:45:48,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:45:48,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 10:45:48,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-20 10:45:48,713 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-20 10:45:48,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:45:48,854 INFO L93 Difference]: Finished difference Result 160 states and 196 transitions. [2022-03-20 10:45:48,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 10:45:48,854 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 38 [2022-03-20 10:45:48,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:45:48,856 INFO L225 Difference]: With dead ends: 160 [2022-03-20 10:45:48,857 INFO L226 Difference]: Without dead ends: 146 [2022-03-20 10:45:48,857 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-20 10:45:48,857 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 67 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:45:48,858 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 224 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:45:48,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-20 10:45:48,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 138. [2022-03-20 10:45:48,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 88 states have (on average 1.2159090909090908) internal successors, (107), 92 states have internal predecessors, (107), 31 states have call successors, (31), 19 states have call predecessors, (31), 18 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-20 10:45:48,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 166 transitions. [2022-03-20 10:45:48,870 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 166 transitions. Word has length 38 [2022-03-20 10:45:48,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:45:48,871 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 166 transitions. [2022-03-20 10:45:48,871 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-20 10:45:48,871 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 166 transitions. [2022-03-20 10:45:48,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-20 10:45:48,871 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:45:48,872 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:45:48,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 10:45:49,093 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:45:49,093 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:45:49,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:45:49,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1525733273, now seen corresponding path program 1 times [2022-03-20 10:45:49,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:45:49,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407300825] [2022-03-20 10:45:49,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:45:49,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:45:49,110 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:45:49,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1043432389] [2022-03-20 10:45:49,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:45:49,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:45:49,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:45:49,115 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) [2022-03-20 10:45:49,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 10:45:49,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:45:49,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 10:45:49,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:45:49,483 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 10:45:49,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:45:49,629 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 10:45:49,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:45:49,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407300825] [2022-03-20 10:45:49,630 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:45:49,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043432389] [2022-03-20 10:45:49,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043432389] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 10:45:49,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 10:45:49,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-20 10:45:49,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928687720] [2022-03-20 10:45:49,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:45:49,631 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 10:45:49,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:45:49,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 10:45:49,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-20 10:45:49,631 INFO L87 Difference]: Start difference. First operand 138 states and 166 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 10:45:51,686 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:45:53,713 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:45:55,854 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:45:56,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:45:56,044 INFO L93 Difference]: Finished difference Result 162 states and 199 transitions. [2022-03-20 10:45:56,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 10:45:56,045 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-03-20 10:45:56,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:45:56,046 INFO L225 Difference]: With dead ends: 162 [2022-03-20 10:45:56,046 INFO L226 Difference]: Without dead ends: 160 [2022-03-20 10:45:56,046 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-20 10:45:56,047 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 11 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-03-20 10:45:56,047 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 176 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 3 Unknown, 0 Unchecked, 6.4s Time] [2022-03-20 10:45:56,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-03-20 10:45:56,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 154. [2022-03-20 10:45:56,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 98 states have (on average 1.2040816326530612) internal successors, (118), 104 states have internal predecessors, (118), 35 states have call successors, (35), 21 states have call predecessors, (35), 20 states have return successors, (32), 28 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-20 10:45:56,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 185 transitions. [2022-03-20 10:45:56,057 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 185 transitions. Word has length 46 [2022-03-20 10:45:56,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:45:56,057 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 185 transitions. [2022-03-20 10:45:56,057 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 10:45:56,058 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 185 transitions. [2022-03-20 10:45:56,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 10:45:56,058 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:45:56,059 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:45:56,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 10:45:56,263 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:45:56,263 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:45:56,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:45:56,263 INFO L85 PathProgramCache]: Analyzing trace with hash 450187565, now seen corresponding path program 1 times [2022-03-20 10:45:56,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:45:56,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611491840] [2022-03-20 10:45:56,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:45:56,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:45:56,271 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:45:56,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1196569386] [2022-03-20 10:45:56,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:45:56,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:45:56,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:45:56,272 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) [2022-03-20 10:45:56,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 10:45:56,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:45:56,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 10:45:56,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:45:56,442 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 10:45:56,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:45:56,564 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 10:45:56,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:45:56,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611491840] [2022-03-20 10:45:56,564 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:45:56,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196569386] [2022-03-20 10:45:56,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196569386] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:45:56,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:45:56,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-20 10:45:56,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539410137] [2022-03-20 10:45:56,565 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:45:56,565 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 10:45:56,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:45:56,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 10:45:56,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-20 10:45:56,566 INFO L87 Difference]: Start difference. First operand 154 states and 185 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-03-20 10:45:56,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:45:56,735 INFO L93 Difference]: Finished difference Result 281 states and 346 transitions. [2022-03-20 10:45:56,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 10:45:56,736 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) Word has length 50 [2022-03-20 10:45:56,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:45:56,737 INFO L225 Difference]: With dead ends: 281 [2022-03-20 10:45:56,738 INFO L226 Difference]: Without dead ends: 257 [2022-03-20 10:45:56,738 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-03-20 10:45:56,738 INFO L913 BasicCegarLoop]: 68 mSDtfsCounter, 96 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:45:56,738 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 330 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:45:56,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-03-20 10:45:56,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 250. [2022-03-20 10:45:56,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 160 states have (on average 1.2) internal successors, (192), 172 states have internal predecessors, (192), 59 states have call successors, (59), 31 states have call predecessors, (59), 30 states have return successors, (54), 46 states have call predecessors, (54), 54 states have call successors, (54) [2022-03-20 10:45:56,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 305 transitions. [2022-03-20 10:45:56,753 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 305 transitions. Word has length 50 [2022-03-20 10:45:56,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:45:56,753 INFO L478 AbstractCegarLoop]: Abstraction has 250 states and 305 transitions. [2022-03-20 10:45:56,753 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-03-20 10:45:56,753 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 305 transitions. [2022-03-20 10:45:56,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 10:45:56,754 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:45:56,754 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 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] [2022-03-20 10:45:56,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 10:45:56,972 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:45:56,972 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:45:56,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:45:56,972 INFO L85 PathProgramCache]: Analyzing trace with hash 451289832, now seen corresponding path program 1 times [2022-03-20 10:45:56,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:45:56,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718914062] [2022-03-20 10:45:56,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:45:56,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:45:56,981 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:45:56,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315035986] [2022-03-20 10:45:56,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:45:56,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:45:56,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:45:56,982 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) [2022-03-20 10:45:56,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process