/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/cohendiv-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 20:43:29,336 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 20:43:29,338 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 20:43:29,393 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 20:43:29,394 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 20:43:29,394 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 20:43:29,396 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 20:43:29,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 20:43:29,399 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 20:43:29,418 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 20:43:29,419 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 20:43:29,420 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 20:43:29,420 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 20:43:29,422 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 20:43:29,422 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 20:43:29,424 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 20:43:29,425 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 20:43:29,425 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 20:43:29,427 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 20:43:29,431 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 20:43:29,432 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 20:43:29,433 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 20:43:29,433 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 20:43:29,434 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 20:43:29,434 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 20:43:29,439 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-17 20:43:29,439 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-17 20:43:29,439 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-17 20:43:29,439 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-17 20:43:29,440 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-17 20:43:29,440 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2022-03-17 20:43:29,444 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 20:43:29,444 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 20:43:29,445 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 20:43:29,446 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-17 20:43:29,482 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 20:43:29,482 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 20:43:29,482 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 20:43:29,482 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 20:43:29,483 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 20:43:29,483 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 20:43:29,483 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 20:43:29,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 20:43:29,483 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 20:43:29,484 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 20:43:29,484 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 20:43:29,484 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 20:43:29,484 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 20:43:29,484 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 20:43:29,484 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 20:43:29,485 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 20:43:29,485 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 20:43:29,485 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 20:43:29,485 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 20:43:29,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 20:43:29,485 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 20:43:29,485 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 20:43:29,485 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 20:43:29,485 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 20:43:29,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 20:43:29,485 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 20:43:29,485 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 20:43:29,486 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 20:43:29,486 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 20:43:29,486 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 20:43:29,625 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 20:43:29,636 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 20:43:29,637 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 20:43:29,638 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 20:43:29,639 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 20:43:29,639 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound10.c [2022-03-17 20:43:29,674 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d5a9801d/6bf0dca4eef84b8ca125270b4ae5a21a/FLAG0ae8af6cf [2022-03-17 20:43:30,010 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 20:43:30,011 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound10.c [2022-03-17 20:43:30,019 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d5a9801d/6bf0dca4eef84b8ca125270b4ae5a21a/FLAG0ae8af6cf [2022-03-17 20:43:30,467 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d5a9801d/6bf0dca4eef84b8ca125270b4ae5a21a [2022-03-17 20:43:30,468 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 20:43:30,469 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 20:43:30,470 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 20:43:30,470 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 20:43:30,482 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 20:43:30,482 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 08:43:30" (1/1) ... [2022-03-17 20:43:30,483 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d7ec4bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:43:30, skipping insertion in model container [2022-03-17 20:43:30,483 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 08:43:30" (1/1) ... [2022-03-17 20:43:30,487 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 20:43:30,499 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 20:43:30,600 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/cohendiv-ll_unwindbound10.c[576,589] [2022-03-17 20:43:30,618 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 20:43:30,623 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 20:43:30,629 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/cohendiv-ll_unwindbound10.c[576,589] [2022-03-17 20:43:30,633 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 20:43:30,646 INFO L208 MainTranslator]: Completed translation [2022-03-17 20:43:30,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:43:30 WrapperNode [2022-03-17 20:43:30,648 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 20:43:30,649 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 20:43:30,650 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 20:43:30,650 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 20:43:30,656 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:43:30" (1/1) ... [2022-03-17 20:43:30,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:43:30" (1/1) ... [2022-03-17 20:43:30,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:43:30" (1/1) ... [2022-03-17 20:43:30,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:43:30" (1/1) ... [2022-03-17 20:43:30,663 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:43:30" (1/1) ... [2022-03-17 20:43:30,667 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:43:30" (1/1) ... [2022-03-17 20:43:30,671 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:43:30" (1/1) ... [2022-03-17 20:43:30,672 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 20:43:30,673 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 20:43:30,673 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 20:43:30,673 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 20:43:30,675 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:43:30" (1/1) ... [2022-03-17 20:43:30,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 20:43:30,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:43:30,700 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) [2022-03-17 20:43:30,704 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 [2022-03-17 20:43:30,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 20:43:30,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 20:43:30,729 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 20:43:30,729 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 20:43:30,729 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 20:43:30,729 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 20:43:30,730 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 20:43:30,730 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 20:43:30,730 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 20:43:30,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 20:43:30,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 20:43:30,730 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 20:43:30,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 20:43:30,730 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 20:43:30,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 20:43:30,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 20:43:30,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 20:43:30,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 20:43:30,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 20:43:30,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 20:43:30,771 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 20:43:30,772 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 20:43:30,883 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 20:43:30,886 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 20:43:30,887 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-17 20:43:30,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 08:43:30 BoogieIcfgContainer [2022-03-17 20:43:30,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 20:43:30,890 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 20:43:30,890 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 20:43:30,891 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 20:43:30,893 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 08:43:30" (1/1) ... [2022-03-17 20:43:30,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 08:43:30 BasicIcfg [2022-03-17 20:43:30,911 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 20:43:30,912 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 20:43:30,912 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 20:43:30,917 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 20:43:30,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 08:43:30" (1/4) ... [2022-03-17 20:43:30,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ed054e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 08:43:30, skipping insertion in model container [2022-03-17 20:43:30,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:43:30" (2/4) ... [2022-03-17 20:43:30,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ed054e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 08:43:30, skipping insertion in model container [2022-03-17 20:43:30,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 08:43:30" (3/4) ... [2022-03-17 20:43:30,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ed054e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 08:43:30, skipping insertion in model container [2022-03-17 20:43:30,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 08:43:30" (4/4) ... [2022-03-17 20:43:30,924 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound10.cqvasr [2022-03-17 20:43:30,928 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 20:43:30,928 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 20:43:30,954 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 20:43:30,958 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 [2022-03-17 20:43:30,958 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 20:43:30,968 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 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) [2022-03-17 20:43:30,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-17 20:43:30,971 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:43:30,971 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:43:30,971 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:43:30,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:43:30,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1213541379, now seen corresponding path program 1 times [2022-03-17 20:43:30,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:43:30,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875833327] [2022-03-17 20:43:30,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:30,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:43:31,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:43:31,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:43:31,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:43:31,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 20:43:31,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:43:31,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:43:31,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:43:31,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875833327] [2022-03-17 20:43:31,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875833327] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:43:31,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:43:31,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 20:43:31,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831772256] [2022-03-17 20:43:31,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:43:31,094 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 20:43:31,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:43:31,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 20:43:31,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 20:43:31,112 INFO L87 Difference]: Start difference. First operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-03-17 20:43:31,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:43:31,170 INFO L93 Difference]: Finished difference Result 68 states and 101 transitions. [2022-03-17 20:43:31,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 20:43:31,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 17 [2022-03-17 20:43:31,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:43:31,176 INFO L225 Difference]: With dead ends: 68 [2022-03-17 20:43:31,176 INFO L226 Difference]: Without dead ends: 34 [2022-03-17 20:43:31,178 INFO L911 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 [2022-03-17 20:43:31,180 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:43:31,181 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:43:31,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-17 20:43:31,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-03-17 20:43:31,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 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) [2022-03-17 20:43:31,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2022-03-17 20:43:31,205 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 17 [2022-03-17 20:43:31,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:43:31,205 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2022-03-17 20:43:31,205 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-03-17 20:43:31,205 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2022-03-17 20:43:31,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-17 20:43:31,206 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:43:31,206 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:43:31,206 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 20:43:31,206 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:43:31,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:43:31,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1202035559, now seen corresponding path program 1 times [2022-03-17 20:43:31,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:43:31,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100398171] [2022-03-17 20:43:31,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:31,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:43:31,220 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:43:31,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1092365615] [2022-03-17 20:43:31,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:31,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:43:31,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:43:31,254 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) [2022-03-17 20:43:31,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 20:43:31,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:43:31,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-17 20:43:31,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:43:31,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:43:31,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 20:43:31,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:43:31,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100398171] [2022-03-17 20:43:31,387 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:43:31,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092365615] [2022-03-17 20:43:31,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092365615] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:43:31,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:43:31,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 20:43:31,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30452168] [2022-03-17 20:43:31,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:43:31,389 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 20:43:31,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:43:31,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 20:43:31,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 20:43:31,390 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-03-17 20:43:31,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:43:31,401 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2022-03-17 20:43:31,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 20:43:31,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 18 [2022-03-17 20:43:31,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:43:31,402 INFO L225 Difference]: With dead ends: 42 [2022-03-17 20:43:31,402 INFO L226 Difference]: Without dead ends: 35 [2022-03-17 20:43:31,403 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 20:43:31,404 INFO L912 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 [2022-03-17 20:43:31,404 INFO L913 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] [2022-03-17 20:43:31,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-17 20:43:31,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-17 20:43:31,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 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) [2022-03-17 20:43:31,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-03-17 20:43:31,412 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 18 [2022-03-17 20:43:31,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:43:31,412 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-03-17 20:43:31,412 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-03-17 20:43:31,412 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-03-17 20:43:31,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-17 20:43:31,413 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:43:31,413 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:43:31,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 20:43:31,627 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:43:31,627 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:43:31,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:43:31,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1200933292, now seen corresponding path program 1 times [2022-03-17 20:43:31,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:43:31,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806063993] [2022-03-17 20:43:31,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:31,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:43:31,667 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:43:31,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [43693773] [2022-03-17 20:43:31,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:31,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:43:31,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:43:31,695 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) [2022-03-17 20:43:31,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 20:43:31,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:43:31,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 20:43:31,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:43:31,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:43:31,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 20:43:31,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:43:31,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806063993] [2022-03-17 20:43:31,824 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:43:31,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43693773] [2022-03-17 20:43:31,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43693773] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:43:31,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:43:31,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 20:43:31,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174992960] [2022-03-17 20:43:31,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:43:31,825 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 20:43:31,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:43:31,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 20:43:31,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 20:43:31,825 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 20:43:31,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:43:31,879 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2022-03-17 20:43:31,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 20:43:31,880 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-17 20:43:31,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:43:31,881 INFO L225 Difference]: With dead ends: 45 [2022-03-17 20:43:31,881 INFO L226 Difference]: Without dead ends: 43 [2022-03-17 20:43:31,881 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 20:43:31,882 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:43:31,882 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 149 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:43:31,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-17 20:43:31,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-03-17 20:43:31,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 20:43:31,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2022-03-17 20:43:31,889 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 18 [2022-03-17 20:43:31,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:43:31,890 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2022-03-17 20:43:31,890 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 20:43:31,890 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2022-03-17 20:43:31,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-17 20:43:31,890 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:43:31,890 INFO L500 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] [2022-03-17 20:43:31,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 20:43:32,091 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-17 20:43:32,091 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:43:32,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:43:32,092 INFO L85 PathProgramCache]: Analyzing trace with hash -944097291, now seen corresponding path program 1 times [2022-03-17 20:43:32,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:43:32,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058642341] [2022-03-17 20:43:32,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:32,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:43:32,101 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:43:32,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [160177812] [2022-03-17 20:43:32,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:32,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:43:32,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:43:32,108 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) [2022-03-17 20:43:32,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 20:43:32,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:43:32,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 20:43:32,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:43:32,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:43:32,245 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 20:43:32,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:43:32,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058642341] [2022-03-17 20:43:32,246 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:43:32,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160177812] [2022-03-17 20:43:32,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160177812] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:43:32,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:43:32,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 20:43:32,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686189349] [2022-03-17 20:43:32,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:43:32,247 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 20:43:32,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:43:32,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 20:43:32,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 20:43:32,249 INFO L87 Difference]: Start difference. First operand 40 states and 49 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 20:43:32,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:43:32,298 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2022-03-17 20:43:32,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 20:43:32,298 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, (5), 2 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 [2022-03-17 20:43:32,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:43:32,300 INFO L225 Difference]: With dead ends: 58 [2022-03-17 20:43:32,300 INFO L226 Difference]: Without dead ends: 55 [2022-03-17 20:43:32,300 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 20:43:32,304 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 13 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:43:32,305 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 149 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:43:32,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-17 20:43:32,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-03-17 20:43:32,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-17 20:43:32,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2022-03-17 20:43:32,320 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 23 [2022-03-17 20:43:32,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:43:32,320 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2022-03-17 20:43:32,320 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 20:43:32,321 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2022-03-17 20:43:32,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-17 20:43:32,321 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:43:32,321 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:43:32,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 20:43:32,540 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:43:32,540 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:43:32,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:43:32,541 INFO L85 PathProgramCache]: Analyzing trace with hash -653220550, now seen corresponding path program 1 times [2022-03-17 20:43:32,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:43:32,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855883909] [2022-03-17 20:43:32,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:32,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:43:32,549 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:43:32,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1691648863] [2022-03-17 20:43:32,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:32,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:43:32,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:43:32,557 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) [2022-03-17 20:43:32,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 20:43:32,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:43:32,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 20:43:32,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:43:32,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 20:43:32,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 20:43:32,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:43:32,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855883909] [2022-03-17 20:43:32,665 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:43:32,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691648863] [2022-03-17 20:43:32,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691648863] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:43:32,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:43:32,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 20:43:32,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612642053] [2022-03-17 20:43:32,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:43:32,666 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 20:43:32,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:43:32,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 20:43:32,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 20:43:32,666 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-17 20:43:32,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:43:32,716 INFO L93 Difference]: Finished difference Result 83 states and 113 transitions. [2022-03-17 20:43:32,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 20:43:32,716 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2022-03-17 20:43:32,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:43:32,717 INFO L225 Difference]: With dead ends: 83 [2022-03-17 20:43:32,717 INFO L226 Difference]: Without dead ends: 81 [2022-03-17 20:43:32,718 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 20:43:32,718 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 13 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:43:32,718 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 160 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:43:32,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-17 20:43:32,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2022-03-17 20:43:32,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 46 states have internal predecessors, (56), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-17 20:43:32,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2022-03-17 20:43:32,726 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 31 [2022-03-17 20:43:32,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:43:32,727 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 100 transitions. [2022-03-17 20:43:32,727 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-17 20:43:32,727 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 100 transitions. [2022-03-17 20:43:32,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-17 20:43:32,728 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:43:32,728 INFO L500 BasicCegarLoop]: trace histogram [3, 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] [2022-03-17 20:43:32,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 20:43:32,943 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:43:32,944 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:43:32,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:43:32,944 INFO L85 PathProgramCache]: Analyzing trace with hash -830156892, now seen corresponding path program 1 times [2022-03-17 20:43:32,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:43:32,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578319757] [2022-03-17 20:43:32,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:32,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:43:32,953 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:43:32,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [321736205] [2022-03-17 20:43:32,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:32,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:43:32,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:43:32,954 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) [2022-03-17 20:43:32,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 20:43:32,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:43:32,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 20:43:32,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:43:33,065 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 20:43:33,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 20:43:33,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:43:33,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578319757] [2022-03-17 20:43:33,066 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:43:33,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321736205] [2022-03-17 20:43:33,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321736205] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:43:33,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:43:33,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 20:43:33,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350971816] [2022-03-17 20:43:33,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:43:33,066 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 20:43:33,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:43:33,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 20:43:33,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 20:43:33,067 INFO L87 Difference]: Start difference. First operand 74 states and 100 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-17 20:43:33,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:43:33,089 INFO L93 Difference]: Finished difference Result 113 states and 153 transitions. [2022-03-17 20:43:33,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 20:43:33,089 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2022-03-17 20:43:33,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:43:33,091 INFO L225 Difference]: With dead ends: 113 [2022-03-17 20:43:33,091 INFO L226 Difference]: Without dead ends: 78 [2022-03-17 20:43:33,091 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 20:43:33,092 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 135 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 [2022-03-17 20:43:33,092 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 135 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:43:33,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-17 20:43:33,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-03-17 20:43:33,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 49 states have internal predecessors, (58), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-17 20:43:33,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 102 transitions. [2022-03-17 20:43:33,098 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 102 transitions. Word has length 34 [2022-03-17 20:43:33,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:43:33,098 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 102 transitions. [2022-03-17 20:43:33,098 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-17 20:43:33,098 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 102 transitions. [2022-03-17 20:43:33,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-17 20:43:33,099 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:43:33,099 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:43:33,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 20:43:33,312 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:43:33,313 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:43:33,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:43:33,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1527688582, now seen corresponding path program 1 times [2022-03-17 20:43:33,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:43:33,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037622834] [2022-03-17 20:43:33,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:33,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:43:33,325 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:43:33,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2029925398] [2022-03-17 20:43:33,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:33,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:43:33,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:43:33,326 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) [2022-03-17 20:43:33,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 20:43:33,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:43:33,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 20:43:33,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:43:33,461 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 20:43:33,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 20:43:33,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:43:33,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037622834] [2022-03-17 20:43:33,462 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:43:33,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029925398] [2022-03-17 20:43:33,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029925398] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:43:33,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:43:33,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-17 20:43:33,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413477496] [2022-03-17 20:43:33,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:43:33,463 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 20:43:33,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:43:33,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 20:43:33,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-17 20:43:33,463 INFO L87 Difference]: Start difference. First operand 78 states and 102 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-17 20:43:33,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:43:33,547 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2022-03-17 20:43:33,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-17 20:43:33,548 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2022-03-17 20:43:33,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:43:33,548 INFO L225 Difference]: With dead ends: 84 [2022-03-17 20:43:33,548 INFO L226 Difference]: Without dead ends: 82 [2022-03-17 20:43:33,549 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-17 20:43:33,549 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 20:43:33,549 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 203 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 20:43:33,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-17 20:43:33,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-03-17 20:43:33,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 50 states have (on average 1.22) internal successors, (61), 52 states have internal predecessors, (61), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-17 20:43:33,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2022-03-17 20:43:33,557 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 41 [2022-03-17 20:43:33,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:43:33,557 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2022-03-17 20:43:33,557 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-17 20:43:33,557 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2022-03-17 20:43:33,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-17 20:43:33,558 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:43:33,558 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:43:33,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 20:43:33,774 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:43:33,775 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:43:33,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:43:33,775 INFO L85 PathProgramCache]: Analyzing trace with hash 800232443, now seen corresponding path program 1 times [2022-03-17 20:43:33,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:43:33,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044455955] [2022-03-17 20:43:33,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:33,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:43:33,786 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:43:33,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822799504] [2022-03-17 20:43:33,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:33,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:43:33,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:43:33,787 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) [2022-03-17 20:43:33,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 20:43:33,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:43:33,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 20:43:33,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:43:33,953 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-17 20:43:33,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:43:34,134 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-17 20:43:34,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:43:34,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044455955] [2022-03-17 20:43:34,134 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:43:34,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822799504] [2022-03-17 20:43:34,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822799504] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:43:34,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 20:43:34,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-17 20:43:34,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314913019] [2022-03-17 20:43:34,135 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 20:43:34,135 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 20:43:34,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:43:34,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 20:43:34,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-17 20:43:34,151 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-17 20:43:34,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:43:34,238 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2022-03-17 20:43:34,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-17 20:43:34,238 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 47 [2022-03-17 20:43:34,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:43:34,239 INFO L225 Difference]: With dead ends: 88 [2022-03-17 20:43:34,239 INFO L226 Difference]: Without dead ends: 86 [2022-03-17 20:43:34,239 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-03-17 20:43:34,240 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 35 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 20:43:34,240 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 137 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 20:43:34,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-17 20:43:34,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-03-17 20:43:34,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 55 states have internal predecessors, (64), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-17 20:43:34,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2022-03-17 20:43:34,250 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 47 [2022-03-17 20:43:34,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:43:34,250 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2022-03-17 20:43:34,250 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-17 20:43:34,250 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2022-03-17 20:43:34,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-17 20:43:34,251 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:43:34,252 INFO L500 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] [2022-03-17 20:43:34,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-17 20:43:34,467 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:43:34,468 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:43:34,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:43:34,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1984817020, now seen corresponding path program 1 times [2022-03-17 20:43:34,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:43:34,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348600367] [2022-03-17 20:43:34,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:34,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:43:34,477 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:43:34,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [916873836] [2022-03-17 20:43:34,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:34,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:43:34,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:43:34,496 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) [2022-03-17 20:43:34,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-17 20:43:34,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:43:34,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 20:43:34,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:43:34,642 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 20:43:34,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:43:34,746 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-17 20:43:34,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:43:34,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348600367] [2022-03-17 20:43:34,746 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:43:34,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916873836] [2022-03-17 20:43:34,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916873836] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:43:34,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 20:43:34,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-17 20:43:34,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575855232] [2022-03-17 20:43:34,746 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 20:43:34,747 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 20:43:34,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:43:34,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 20:43:34,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-17 20:43:34,747 INFO L87 Difference]: Start difference. First operand 86 states and 108 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) [2022-03-17 20:43:34,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:43:34,870 INFO L93 Difference]: Finished difference Result 257 states and 311 transitions. [2022-03-17 20:43:34,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-17 20:43:34,870 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 [2022-03-17 20:43:34,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:43:34,874 INFO L225 Difference]: With dead ends: 257 [2022-03-17 20:43:34,874 INFO L226 Difference]: Without dead ends: 250 [2022-03-17 20:43:34,874 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-03-17 20:43:34,876 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 102 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 20:43:34,876 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 220 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 20:43:34,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-03-17 20:43:34,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 239. [2022-03-17 20:43:34,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 153 states have (on average 1.1895424836601307) internal successors, (182), 161 states have internal predecessors, (182), 57 states have call successors, (57), 29 states have call predecessors, (57), 28 states have return successors, (52), 48 states have call predecessors, (52), 52 states have call successors, (52) [2022-03-17 20:43:34,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 291 transitions. [2022-03-17 20:43:34,905 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 291 transitions. Word has length 50 [2022-03-17 20:43:34,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:43:34,905 INFO L478 AbstractCegarLoop]: Abstraction has 239 states and 291 transitions. [2022-03-17 20:43:34,905 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) [2022-03-17 20:43:34,905 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 291 transitions. [2022-03-17 20:43:34,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-17 20:43:34,909 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:43:34,909 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:43:34,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-17 20:43:35,128 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-17 20:43:35,128 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:43:35,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:43:35,129 INFO L85 PathProgramCache]: Analyzing trace with hash 960315114, now seen corresponding path program 1 times [2022-03-17 20:43:35,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:43:35,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692297831] [2022-03-17 20:43:35,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:35,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:43:35,150 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:43:35,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [175530011] [2022-03-17 20:43:35,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:35,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:43:35,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:43:35,155 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:43:35,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-17 20:43:35,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:43:35,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-17 20:43:35,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:43:35,430 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-17 20:43:35,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:43:35,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:43:35,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692297831] [2022-03-17 20:43:35,617 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:43:35,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175530011] [2022-03-17 20:43:35,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175530011] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 20:43:35,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 20:43:35,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-17 20:43:35,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311096439] [2022-03-17 20:43:35,618 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 20:43:35,619 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-17 20:43:35,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:43:35,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-17 20:43:35,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-03-17 20:43:35,619 INFO L87 Difference]: Start difference. First operand 239 states and 291 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-03-17 20:43:35,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:43:35,765 INFO L93 Difference]: Finished difference Result 318 states and 381 transitions. [2022-03-17 20:43:35,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 20:43:35,765 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 55 [2022-03-17 20:43:35,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:43:35,767 INFO L225 Difference]: With dead ends: 318 [2022-03-17 20:43:35,767 INFO L226 Difference]: Without dead ends: 203 [2022-03-17 20:43:35,769 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-03-17 20:43:35,770 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 24 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 20:43:35,770 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 227 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 20:43:35,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-17 20:43:35,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2022-03-17 20:43:35,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 130 states have (on average 1.1692307692307693) internal successors, (152), 136 states have internal predecessors, (152), 46 states have call successors, (46), 26 states have call predecessors, (46), 25 states have return successors, (42), 39 states have call predecessors, (42), 42 states have call successors, (42) [2022-03-17 20:43:35,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 240 transitions. [2022-03-17 20:43:35,785 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 240 transitions. Word has length 55 [2022-03-17 20:43:35,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:43:35,786 INFO L478 AbstractCegarLoop]: Abstraction has 202 states and 240 transitions. [2022-03-17 20:43:35,786 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-03-17 20:43:35,786 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 240 transitions. [2022-03-17 20:43:35,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-17 20:43:35,788 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:43:35,788 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:43:35,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-17 20:43:36,005 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-17 20:43:36,005 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:43:36,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:43:36,006 INFO L85 PathProgramCache]: Analyzing trace with hash 136506131, now seen corresponding path program 1 times [2022-03-17 20:43:36,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:43:36,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422012544] [2022-03-17 20:43:36,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:36,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:43:36,013 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:43:36,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1372179998] [2022-03-17 20:43:36,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:36,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:43:36,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:43:36,023 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:43:36,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-17 20:43:36,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:43:36,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 20:43:36,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:43:36,150 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 40 proven. 34 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-17 20:43:36,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:43:36,241 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-17 20:43:36,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:43:36,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422012544] [2022-03-17 20:43:36,242 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:43:36,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372179998] [2022-03-17 20:43:36,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372179998] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:43:36,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 20:43:36,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-17 20:43:36,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686139303] [2022-03-17 20:43:36,242 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 20:43:36,242 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 20:43:36,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:43:36,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 20:43:36,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-17 20:43:36,243 INFO L87 Difference]: Start difference. First operand 202 states and 240 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 8 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-17 20:43:36,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:43:36,361 INFO L93 Difference]: Finished difference Result 308 states and 368 transitions. [2022-03-17 20:43:36,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-17 20:43:36,361 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 8 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) Word has length 63 [2022-03-17 20:43:36,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:43:36,362 INFO L225 Difference]: With dead ends: 308 [2022-03-17 20:43:36,363 INFO L226 Difference]: Without dead ends: 214 [2022-03-17 20:43:36,363 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-03-17 20:43:36,363 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 130 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 20:43:36,363 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 206 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 20:43:36,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-03-17 20:43:36,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 210. [2022-03-17 20:43:36,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 138 states have (on average 1.1304347826086956) internal successors, (156), 142 states have internal predecessors, (156), 46 states have call successors, (46), 26 states have call predecessors, (46), 25 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2022-03-17 20:43:36,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 244 transitions. [2022-03-17 20:43:36,373 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 244 transitions. Word has length 63 [2022-03-17 20:43:36,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:43:36,373 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 244 transitions. [2022-03-17 20:43:36,373 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 8 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-17 20:43:36,373 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 244 transitions. [2022-03-17 20:43:36,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-17 20:43:36,374 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:43:36,374 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:43:36,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-17 20:43:36,590 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-17 20:43:36,590 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:43:36,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:43:36,590 INFO L85 PathProgramCache]: Analyzing trace with hash -286098381, now seen corresponding path program 1 times [2022-03-17 20:43:36,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:43:36,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737699028] [2022-03-17 20:43:36,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:36,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:43:36,597 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:43:36,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [56073465] [2022-03-17 20:43:36,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:36,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:43:36,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:43:36,616 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:43:36,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-17 20:43:36,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:43:36,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-17 20:43:36,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:43:36,869 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-17 20:43:36,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:43:37,010 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-17 20:43:37,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:43:37,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737699028] [2022-03-17 20:43:37,010 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:43:37,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56073465] [2022-03-17 20:43:37,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56073465] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:43:37,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 20:43:37,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-03-17 20:43:37,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261671968] [2022-03-17 20:43:37,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 20:43:37,011 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-17 20:43:37,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:43:37,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-17 20:43:37,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-17 20:43:37,011 INFO L87 Difference]: Start difference. First operand 210 states and 244 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 8 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-17 20:43:37,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:43:37,310 INFO L93 Difference]: Finished difference Result 236 states and 272 transitions. [2022-03-17 20:43:37,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 20:43:37,310 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 8 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 79 [2022-03-17 20:43:37,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:43:37,310 INFO L225 Difference]: With dead ends: 236 [2022-03-17 20:43:37,310 INFO L226 Difference]: Without dead ends: 0 [2022-03-17 20:43:37,311 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-03-17 20:43:37,311 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 68 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 20:43:37,311 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 354 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 20:43:37,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-17 20:43:37,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-17 20:43:37,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-17 20:43:37,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-17 20:43:37,312 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2022-03-17 20:43:37,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:43:37,312 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-17 20:43:37,312 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 8 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-17 20:43:37,312 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-17 20:43:37,312 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-17 20:43:37,314 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 20:43:37,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-17 20:43:37,527 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-17 20:43:37,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-17 20:43:38,092 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-17 20:43:38,092 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-17 20:43:38,092 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-17 20:43:38,092 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-17 20:43:38,092 INFO L878 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (<= ~counter~0 0) [2022-03-17 20:43:38,092 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-17 20:43:38,092 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-17 20:43:38,092 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2022-03-17 20:43:38,092 INFO L882 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2022-03-17 20:43:38,092 INFO L882 garLoopResultBuilder]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2022-03-17 20:43:38,092 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2022-03-17 20:43:38,092 INFO L878 garLoopResultBuilder]: At program point mainENTRY(lines 23 65) the Hoare annotation is: (or (= ~counter~0 |old(~counter~0)|) (not (<= |old(~counter~0)| 0))) [2022-03-17 20:43:38,092 INFO L878 garLoopResultBuilder]: At program point L30(line 30) the Hoare annotation is: (or (= ~counter~0 |old(~counter~0)|) (not (<= |old(~counter~0)| 0))) [2022-03-17 20:43:38,092 INFO L882 garLoopResultBuilder]: For program point L30-1(line 30) no Hoare annotation was computed. [2022-03-17 20:43:38,092 INFO L878 garLoopResultBuilder]: At program point L37-3(lines 37 61) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0)))) [2022-03-17 20:43:38,092 INFO L878 garLoopResultBuilder]: At program point L37-4(lines 37 61) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= main_~x~0 main_~r~0) (= main_~q~0 0)) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0)))) [2022-03-17 20:43:38,093 INFO L882 garLoopResultBuilder]: For program point L37-1(lines 37 61) no Hoare annotation was computed. [2022-03-17 20:43:38,093 INFO L882 garLoopResultBuilder]: For program point L63(line 63) no Hoare annotation was computed. [2022-03-17 20:43:38,093 INFO L878 garLoopResultBuilder]: At program point L38(line 38) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0)))) [2022-03-17 20:43:38,093 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 23 65) no Hoare annotation was computed. [2022-03-17 20:43:38,093 INFO L878 garLoopResultBuilder]: At program point L38-1(line 38) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0)))) [2022-03-17 20:43:38,093 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 23 65) no Hoare annotation was computed. [2022-03-17 20:43:38,093 INFO L882 garLoopResultBuilder]: For program point L39(lines 37 61) no Hoare annotation was computed. [2022-03-17 20:43:38,093 INFO L878 garLoopResultBuilder]: At program point L46-3(lines 46 58) the Hoare annotation is: (or (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0))) (not (<= |old(~counter~0)| 0))) [2022-03-17 20:43:38,093 INFO L878 garLoopResultBuilder]: At program point L47-1(line 47) the Hoare annotation is: (or (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0))) (not (<= |old(~counter~0)| 0))) [2022-03-17 20:43:38,093 INFO L878 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (or (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0))) (not (<= |old(~counter~0)| 0))) [2022-03-17 20:43:38,093 INFO L882 garLoopResultBuilder]: For program point L49(lines 46 58) no Hoare annotation was computed. [2022-03-17 20:43:38,093 INFO L882 garLoopResultBuilder]: For program point L54-1(line 54) no Hoare annotation was computed. [2022-03-17 20:43:38,093 INFO L882 garLoopResultBuilder]: For program point L46-4(lines 46 58) no Hoare annotation was computed. [2022-03-17 20:43:38,093 INFO L882 garLoopResultBuilder]: For program point L46-1(lines 46 58) no Hoare annotation was computed. [2022-03-17 20:43:38,093 INFO L878 garLoopResultBuilder]: At program point L54(line 54) the Hoare annotation is: (or (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= (* 2 .cse0) main_~r~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 .cse0))) (not (<= |old(~counter~0)| 0))) [2022-03-17 20:43:38,093 INFO L878 garLoopResultBuilder]: At program point L47(line 47) the Hoare annotation is: (or (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0))) (not (<= |old(~counter~0)| 0))) [2022-03-17 20:43:38,093 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-03-17 20:43:38,093 INFO L882 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2022-03-17 20:43:38,093 INFO L882 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2022-03-17 20:43:38,094 INFO L882 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2022-03-17 20:43:38,094 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2022-03-17 20:43:38,094 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2022-03-17 20:43:38,096 INFO L718 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:43:38,096 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 20:43:38,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 08:43:38 BasicIcfg [2022-03-17 20:43:38,105 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 20:43:38,105 INFO L158 Benchmark]: Toolchain (without parser) took 7635.83ms. Allocated memory was 189.8MB in the beginning and 241.2MB in the end (delta: 51.4MB). Free memory was 137.8MB in the beginning and 104.0MB in the end (delta: 33.8MB). Peak memory consumption was 86.8MB. Max. memory is 8.0GB. [2022-03-17 20:43:38,105 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 189.8MB. Free memory is still 154.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 20:43:38,106 INFO L158 Benchmark]: CACSL2BoogieTranslator took 177.98ms. Allocated memory is still 189.8MB. Free memory was 137.7MB in the beginning and 164.5MB in the end (delta: -26.8MB). Peak memory consumption was 8.1MB. Max. memory is 8.0GB. [2022-03-17 20:43:38,106 INFO L158 Benchmark]: Boogie Preprocessor took 23.31ms. Allocated memory is still 189.8MB. Free memory was 164.3MB in the beginning and 162.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-17 20:43:38,106 INFO L158 Benchmark]: RCFGBuilder took 214.87ms. Allocated memory is still 189.8MB. Free memory was 162.9MB in the beginning and 152.0MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-17 20:43:38,106 INFO L158 Benchmark]: IcfgTransformer took 20.29ms. Allocated memory is still 189.8MB. Free memory was 152.0MB in the beginning and 151.0MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 20:43:38,106 INFO L158 Benchmark]: TraceAbstraction took 7193.34ms. Allocated memory was 189.8MB in the beginning and 241.2MB in the end (delta: 51.4MB). Free memory was 150.3MB in the beginning and 104.0MB in the end (delta: 46.3MB). Peak memory consumption was 98.6MB. Max. memory is 8.0GB. [2022-03-17 20:43:38,107 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 189.8MB. Free memory is still 154.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 177.98ms. Allocated memory is still 189.8MB. Free memory was 137.7MB in the beginning and 164.5MB in the end (delta: -26.8MB). Peak memory consumption was 8.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.31ms. Allocated memory is still 189.8MB. Free memory was 164.3MB in the beginning and 162.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 214.87ms. Allocated memory is still 189.8MB. Free memory was 162.9MB in the beginning and 152.0MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 20.29ms. Allocated memory is still 189.8MB. Free memory was 152.0MB in the beginning and 151.0MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 7193.34ms. Allocated memory was 189.8MB in the beginning and 241.2MB in the end (delta: 51.4MB). Free memory was 150.3MB in the beginning and 104.0MB in the end (delta: 46.3MB). Peak memory consumption was 98.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.1s, OverallIterations: 12, TraceHistogramMax: 11, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 451 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 427 mSDsluCounter, 2096 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1568 mSDsCounter, 277 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 957 IncrementalHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 277 mSolverCounterUnsat, 528 mSDtfsCounter, 957 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 749 GetRequests, 653 SyntacticMatches, 5 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=239occurred in iteration=9, InterpolantAutomatonStates: 88, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 28 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 16 LocationsWithAnnotation, 129 PreInvPairs, 200 NumberOfFragments, 250 HoareAnnotationTreeSize, 129 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 16 FomulaSimplificationsInter, 2803 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 476 NumberOfCodeBlocks, 476 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 699 ConstructedInterpolants, 0 QuantifiedInterpolants, 1996 SizeOfPredicates, 29 NumberOfNonLiveVariables, 1473 ConjunctsInSsa, 112 ConjunctsInUnsatCore, 16 InterpolantComputations, 7 PerfectInterpolantSequences, 861/960 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: (((q * y + r == x && 1 <= r) && 1 <= y) && b == a * y) || !(\old(counter) <= 0) - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: !(\old(counter) <= 0) || ((q * y + r == x && 1 <= y) && b == a * y) RESULT: Ultimate proved your program to be correct! [2022-03-17 20:43:38,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...