/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/loop-acceleration/diamond_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 21:51:47,800 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 21:51:47,802 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 21:51:47,828 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 21:51:47,828 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 21:51:47,829 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 21:51:47,830 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 21:51:47,831 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 21:51:47,832 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 21:51:47,832 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 21:51:47,833 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 21:51:47,834 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 21:51:47,834 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 21:51:47,835 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 21:51:47,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 21:51:47,836 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 21:51:47,836 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 21:51:47,837 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 21:51:47,838 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 21:51:47,839 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 21:51:47,840 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 21:51:47,841 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 21:51:47,841 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 21:51:47,842 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 21:51:47,843 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 21:51:47,844 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 21:51:47,846 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-18 21:51:47,847 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-18 21:51:47,847 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-18 21:51:47,848 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-18 21:51:47,849 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-18 21:51:47,849 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-18 21:51:47,849 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-18 21:51:47,849 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-18 21:51:47,850 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 21:51:47,850 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 21:51:47,851 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 21:51:47,851 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-18 21:51:47,869 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 21:51:47,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 21:51:47,870 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 21:51:47,870 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 21:51:47,870 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 21:51:47,871 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 21:51:47,871 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 21:51:47,871 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 21:51:47,871 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 21:51:47,871 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 21:51:47,871 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 21:51:47,871 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 21:51:47,871 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 21:51:47,871 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 21:51:47,871 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 21:51:47,872 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 21:51:47,872 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 21:51:47,872 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 21:51:47,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 21:51:47,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 21:51:47,872 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 21:51:47,872 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 21:51:47,872 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 21:51:47,872 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 21:51:47,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 21:51:47,873 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 21:51:47,873 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-18 21:51:47,873 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-18 21:51:47,873 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 21:51:47,873 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 21:51:48,088 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 21:51:48,114 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 21:51:48,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 21:51:48,116 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 21:51:48,118 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 21:51:48,119 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/diamond_1-2.c [2022-03-18 21:51:48,167 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/161dd2e1b/8054e2aee59b41ef8daa2c85249fb1ae/FLAG7b87ff298 [2022-03-18 21:51:48,540 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 21:51:48,541 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/diamond_1-2.c [2022-03-18 21:51:48,546 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/161dd2e1b/8054e2aee59b41ef8daa2c85249fb1ae/FLAG7b87ff298 [2022-03-18 21:51:48,561 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/161dd2e1b/8054e2aee59b41ef8daa2c85249fb1ae [2022-03-18 21:51:48,563 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 21:51:48,565 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 21:51:48,567 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 21:51:48,567 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 21:51:48,570 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 21:51:48,570 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 09:51:48" (1/1) ... [2022-03-18 21:51:48,571 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26f5afe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:51:48, skipping insertion in model container [2022-03-18 21:51:48,572 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 09:51:48" (1/1) ... [2022-03-18 21:51:48,576 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 21:51:48,589 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 21:51:48,742 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/diamond_1-2.c[373,386] [2022-03-18 21:51:48,753 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 21:51:48,760 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 21:51:48,769 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/diamond_1-2.c[373,386] [2022-03-18 21:51:48,776 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 21:51:48,785 INFO L208 MainTranslator]: Completed translation [2022-03-18 21:51:48,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:51:48 WrapperNode [2022-03-18 21:51:48,787 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 21:51:48,789 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 21:51:48,789 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 21:51:48,789 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 21:51:48,797 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:51:48" (1/1) ... [2022-03-18 21:51:48,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:51:48" (1/1) ... [2022-03-18 21:51:48,802 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:51:48" (1/1) ... [2022-03-18 21:51:48,802 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:51:48" (1/1) ... [2022-03-18 21:51:48,808 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:51:48" (1/1) ... [2022-03-18 21:51:48,811 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:51:48" (1/1) ... [2022-03-18 21:51:48,814 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:51:48" (1/1) ... [2022-03-18 21:51:48,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 21:51:48,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 21:51:48,817 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 21:51:48,817 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 21:51:48,818 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:51:48" (1/1) ... [2022-03-18 21:51:48,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 21:51:48,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 21:51:48,853 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) [2022-03-18 21:51:48,872 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 [2022-03-18 21:51:48,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 21:51:48,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 21:51:48,886 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 21:51:48,886 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 21:51:48,886 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 21:51:48,886 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 21:51:48,887 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 21:51:48,887 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 21:51:48,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 21:51:48,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-18 21:51:48,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 21:51:48,888 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 21:51:48,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 21:51:48,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 21:51:48,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 21:51:48,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 21:51:48,889 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 21:51:48,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 21:51:48,935 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 21:51:48,937 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 21:51:49,043 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 21:51:49,046 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 21:51:49,046 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 21:51:49,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 09:51:49 BoogieIcfgContainer [2022-03-18 21:51:49,047 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 21:51:49,048 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 21:51:49,048 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 21:51:49,049 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 21:51:49,051 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 09:51:49" (1/1) ... [2022-03-18 21:51:49,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 09:51:49 BasicIcfg [2022-03-18 21:51:49,060 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 21:51:49,061 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 21:51:49,061 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 21:51:49,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 21:51:49,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 09:51:48" (1/4) ... [2022-03-18 21:51:49,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d109a8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 09:51:49, skipping insertion in model container [2022-03-18 21:51:49,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:51:48" (2/4) ... [2022-03-18 21:51:49,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d109a8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 09:51:49, skipping insertion in model container [2022-03-18 21:51:49,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 09:51:49" (3/4) ... [2022-03-18 21:51:49,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d109a8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 09:51:49, skipping insertion in model container [2022-03-18 21:51:49,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 09:51:49" (4/4) ... [2022-03-18 21:51:49,080 INFO L111 eAbstractionObserver]: Analyzing ICFG diamond_1-2.cqvasr [2022-03-18 21:51:49,096 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 21:51:49,096 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 21:51:49,155 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 21:51:49,159 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 [2022-03-18 21:51:49,160 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 21:51:49,174 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 21:51:49,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-18 21:51:49,177 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:51:49,177 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:51:49,178 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:51:49,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:51:49,184 INFO L85 PathProgramCache]: Analyzing trace with hash -756157467, now seen corresponding path program 1 times [2022-03-18 21:51:49,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:51:49,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437852242] [2022-03-18 21:51:49,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:51:49,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:51:49,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:51:49,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:51:49,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:51:49,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:51:49,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:51:49,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437852242] [2022-03-18 21:51:49,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437852242] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:51:49,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:51:49,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 21:51:49,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994440561] [2022-03-18 21:51:49,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:51:49,327 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 21:51:49,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:51:49,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 21:51:49,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 21:51:49,346 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:51:49,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:51:49,374 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-03-18 21:51:49,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 21:51:49,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-18 21:51:49,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:51:49,386 INFO L225 Difference]: With dead ends: 30 [2022-03-18 21:51:49,387 INFO L226 Difference]: Without dead ends: 13 [2022-03-18 21:51:49,389 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 21:51:49,391 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 21:51:49,392 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 22 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 21:51:49,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-03-18 21:51:49,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-03-18 21:51:49,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:51:49,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-03-18 21:51:49,419 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2022-03-18 21:51:49,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:51:49,419 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-03-18 21:51:49,420 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:51:49,420 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-03-18 21:51:49,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-18 21:51:49,420 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:51:49,420 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:51:49,420 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 21:51:49,421 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:51:49,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:51:49,422 INFO L85 PathProgramCache]: Analyzing trace with hash -755233946, now seen corresponding path program 1 times [2022-03-18 21:51:49,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:51:49,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921412850] [2022-03-18 21:51:49,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:51:49,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:51:49,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:51:49,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:51:49,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:51:49,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:51:49,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:51:49,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921412850] [2022-03-18 21:51:49,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921412850] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:51:49,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:51:49,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:51:49,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013796791] [2022-03-18 21:51:49,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:51:49,502 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:51:49,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:51:49,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:51:49,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:51:49,507 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:51:49,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:51:49,542 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2022-03-18 21:51:49,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:51:49,543 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-18 21:51:49,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:51:49,544 INFO L225 Difference]: With dead ends: 20 [2022-03-18 21:51:49,544 INFO L226 Difference]: Without dead ends: 15 [2022-03-18 21:51:49,548 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:51:49,549 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 21:51:49,550 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 18 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 21:51:49,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-18 21:51:49,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-03-18 21:51:49,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:51:49,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-03-18 21:51:49,560 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-03-18 21:51:49,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:51:49,563 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-03-18 21:51:49,563 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:51:49,563 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-03-18 21:51:49,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-18 21:51:49,564 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:51:49,564 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:51:49,564 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 21:51:49,564 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:51:49,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:51:49,565 INFO L85 PathProgramCache]: Analyzing trace with hash 980092676, now seen corresponding path program 1 times [2022-03-18 21:51:49,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:51:49,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414727776] [2022-03-18 21:51:49,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:51:49,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:51:49,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:51:49,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:51:49,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:51:49,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:51:49,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:51:49,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414727776] [2022-03-18 21:51:49,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414727776] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 21:51:49,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823593472] [2022-03-18 21:51:49,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:51:49,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:51:49,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 21:51:49,682 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) [2022-03-18 21:51:49,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 21:51:49,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:51:49,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 21:51:49,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 21:51:49,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:51:49,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 21:51:49,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:51:49,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823593472] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 21:51:49,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 21:51:49,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-18 21:51:49,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185150597] [2022-03-18 21:51:49,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 21:51:49,860 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 21:51:49,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:51:49,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 21:51:49,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-18 21:51:49,863 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:51:49,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:51:49,972 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2022-03-18 21:51:49,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 21:51:49,973 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-03-18 21:51:49,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:51:49,973 INFO L225 Difference]: With dead ends: 25 [2022-03-18 21:51:49,973 INFO L226 Difference]: Without dead ends: 20 [2022-03-18 21:51:49,975 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-03-18 21:51:49,976 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 17 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 21:51:49,978 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 23 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:51:49,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-18 21:51:49,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-03-18 21:51:49,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:51:49,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-03-18 21:51:49,984 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 13 [2022-03-18 21:51:49,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:51:49,985 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-03-18 21:51:49,985 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:51:49,985 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-03-18 21:51:49,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-18 21:51:49,985 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:51:49,986 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:51:50,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-18 21:51:50,199 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:51:50,200 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:51:50,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:51:50,201 INFO L85 PathProgramCache]: Analyzing trace with hash -341862240, now seen corresponding path program 1 times [2022-03-18 21:51:50,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:51:50,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354564872] [2022-03-18 21:51:50,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:51:50,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:51:50,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:51:50,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:51:50,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:51:50,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:51:50,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:51:50,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354564872] [2022-03-18 21:51:50,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354564872] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 21:51:50,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202993810] [2022-03-18 21:51:50,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:51:50,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:51:50,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 21:51:50,284 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) [2022-03-18 21:51:50,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 21:51:50,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:51:50,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 21:51:50,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 21:51:50,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:51:50,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 21:51:50,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:51:50,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202993810] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 21:51:50,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 21:51:50,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-18 21:51:50,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870860841] [2022-03-18 21:51:50,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 21:51:50,447 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 21:51:50,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:51:50,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 21:51:50,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-03-18 21:51:50,448 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:51:50,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:51:50,645 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2022-03-18 21:51:50,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 21:51:50,646 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-18 21:51:50,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:51:50,647 INFO L225 Difference]: With dead ends: 36 [2022-03-18 21:51:50,647 INFO L226 Difference]: Without dead ends: 31 [2022-03-18 21:51:50,648 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2022-03-18 21:51:50,648 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 21:51:50,648 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 38 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:51:50,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-18 21:51:50,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2022-03-18 21:51:50,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:51:50,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2022-03-18 21:51:50,653 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 15 [2022-03-18 21:51:50,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:51:50,653 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-03-18 21:51:50,653 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:51:50,653 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2022-03-18 21:51:50,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-18 21:51:50,654 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:51:50,654 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:51:50,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 21:51:50,874 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,SelfDestructingSolverStorable3 [2022-03-18 21:51:50,876 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:51:50,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:51:50,878 INFO L85 PathProgramCache]: Analyzing trace with hash 265640572, now seen corresponding path program 2 times [2022-03-18 21:51:50,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:51:50,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772571597] [2022-03-18 21:51:50,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:51:50,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:51:50,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:51:50,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:51:50,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:51:50,990 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:51:50,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:51:50,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772571597] [2022-03-18 21:51:50,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772571597] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 21:51:50,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026479709] [2022-03-18 21:51:50,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 21:51:50,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:51:50,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 21:51:51,000 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) [2022-03-18 21:51:51,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 21:51:51,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 21:51:51,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 21:51:51,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 21:51:51,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 21:51:51,098 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:51:51,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 21:51:51,215 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:51:51,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026479709] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 21:51:51,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 21:51:51,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-03-18 21:51:51,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780508969] [2022-03-18 21:51:51,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 21:51:51,216 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 21:51:51,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:51:51,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 21:51:51,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2022-03-18 21:51:51,217 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:51:51,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:51:51,754 INFO L93 Difference]: Finished difference Result 71 states and 101 transitions. [2022-03-18 21:51:51,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 21:51:51,755 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-03-18 21:51:51,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:51:51,756 INFO L225 Difference]: With dead ends: 71 [2022-03-18 21:51:51,756 INFO L226 Difference]: Without dead ends: 66 [2022-03-18 21:51:51,756 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=233, Invalid=523, Unknown=0, NotChecked=0, Total=756 [2022-03-18 21:51:51,757 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 21:51:51,757 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 48 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 21:51:51,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-18 21:51:51,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 36. [2022-03-18 21:51:51,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 31 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:51:51,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2022-03-18 21:51:51,763 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 21 [2022-03-18 21:51:51,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:51:51,764 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2022-03-18 21:51:51,764 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:51:51,764 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2022-03-18 21:51:51,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 21:51:51,765 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:51:51,765 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:51:51,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-18 21:51:51,986 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:51:51,987 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:51:51,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:51:51,987 INFO L85 PathProgramCache]: Analyzing trace with hash -819090412, now seen corresponding path program 2 times [2022-03-18 21:51:51,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:51:51,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594631940] [2022-03-18 21:51:51,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:51:51,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:51:51,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:51:52,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:51:52,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:51:52,105 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:51:52,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:51:52,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594631940] [2022-03-18 21:51:52,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594631940] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 21:51:52,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707289765] [2022-03-18 21:51:52,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 21:51:52,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:51:52,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 21:51:52,107 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) [2022-03-18 21:51:52,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 21:51:52,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 21:51:52,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 21:51:52,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-18 21:51:52,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 21:51:52,251 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:51:52,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 21:51:52,409 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:51:52,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707289765] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 21:51:52,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 21:51:52,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-18 21:51:52,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223892116] [2022-03-18 21:51:52,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 21:51:52,410 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 21:51:52,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:51:52,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 21:51:52,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-03-18 21:51:52,412 INFO L87 Difference]: Start difference. First operand 36 states and 48 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:51:53,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:51:53,194 INFO L93 Difference]: Finished difference Result 149 states and 217 transitions. [2022-03-18 21:51:53,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 21:51:53,195 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-03-18 21:51:53,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:51:53,196 INFO L225 Difference]: With dead ends: 149 [2022-03-18 21:51:53,196 INFO L226 Difference]: Without dead ends: 144 [2022-03-18 21:51:53,197 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=324, Invalid=732, Unknown=0, NotChecked=0, Total=1056 [2022-03-18 21:51:53,197 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 21:51:53,197 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 48 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 21:51:53,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-18 21:51:53,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 80. [2022-03-18 21:51:53,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.4666666666666666) internal successors, (110), 75 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:51:53,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 114 transitions. [2022-03-18 21:51:53,212 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 114 transitions. Word has length 23 [2022-03-18 21:51:53,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:51:53,213 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 114 transitions. [2022-03-18 21:51:53,213 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:51:53,213 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 114 transitions. [2022-03-18 21:51:53,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 21:51:53,214 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:51:53,214 INFO L500 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:51:53,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 21:51:53,425 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:51:53,425 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:51:53,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:51:53,426 INFO L85 PathProgramCache]: Analyzing trace with hash -382718831, now seen corresponding path program 1 times [2022-03-18 21:51:53,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:51:53,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618498873] [2022-03-18 21:51:53,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:51:53,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:51:53,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:51:53,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:51:53,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:51:53,461 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-03-18 21:51:53,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:51:53,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618498873] [2022-03-18 21:51:53,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618498873] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:51:53,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:51:53,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:51:53,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329559422] [2022-03-18 21:51:53,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:51:53,462 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:51:53,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:51:53,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:51:53,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:51:53,463 INFO L87 Difference]: Start difference. First operand 80 states and 114 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:51:53,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:51:53,490 INFO L93 Difference]: Finished difference Result 136 states and 195 transitions. [2022-03-18 21:51:53,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:51:53,491 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-18 21:51:53,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:51:53,492 INFO L225 Difference]: With dead ends: 136 [2022-03-18 21:51:53,492 INFO L226 Difference]: Without dead ends: 90 [2022-03-18 21:51:53,493 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:51:53,493 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 21:51:53,494 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 22 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 21:51:53,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-18 21:51:53,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 63. [2022-03-18 21:51:53,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.2758620689655173) internal successors, (74), 58 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:51:53,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2022-03-18 21:51:53,508 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 29 [2022-03-18 21:51:53,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:51:53,508 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2022-03-18 21:51:53,508 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:51:53,508 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2022-03-18 21:51:53,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 21:51:53,509 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:51:53,509 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:51:53,509 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-18 21:51:53,509 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:51:53,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:51:53,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1436785103, now seen corresponding path program 2 times [2022-03-18 21:51:53,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:51:53,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916226566] [2022-03-18 21:51:53,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:51:53,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:51:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:51:53,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:51:53,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:51:53,555 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-03-18 21:51:53,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:51:53,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916226566] [2022-03-18 21:51:53,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916226566] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:51:53,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:51:53,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:51:53,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393037390] [2022-03-18 21:51:53,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:51:53,556 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:51:53,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:51:53,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:51:53,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:51:53,557 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:51:53,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:51:53,591 INFO L93 Difference]: Finished difference Result 88 states and 103 transitions. [2022-03-18 21:51:53,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:51:53,592 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-03-18 21:51:53,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:51:53,593 INFO L225 Difference]: With dead ends: 88 [2022-03-18 21:51:53,593 INFO L226 Difference]: Without dead ends: 64 [2022-03-18 21:51:53,594 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:51:53,594 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 21:51:53,594 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 24 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 21:51:53,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-18 21:51:53,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-03-18 21:51:53,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:51:53,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2022-03-18 21:51:53,614 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 33 [2022-03-18 21:51:53,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:51:53,615 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2022-03-18 21:51:53,615 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:51:53,615 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2022-03-18 21:51:53,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-18 21:51:53,619 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:51:53,619 INFO L500 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:51:53,619 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-18 21:51:53,619 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:51:53,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:51:53,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1063807026, now seen corresponding path program 3 times [2022-03-18 21:51:53,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:51:53,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504504962] [2022-03-18 21:51:53,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:51:53,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:51:53,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:51:53,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:51:53,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:51:53,836 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:51:53,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:51:53,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504504962] [2022-03-18 21:51:53,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504504962] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 21:51:53,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381901582] [2022-03-18 21:51:53,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 21:51:53,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:51:53,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 21:51:53,852 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) [2022-03-18 21:51:53,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 21:51:53,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-03-18 21:51:53,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 21:51:53,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-18 21:51:53,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 21:51:54,141 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:51:54,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 21:51:54,270 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-18 21:51:54,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381901582] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 21:51:54,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 21:51:54,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 7] total 22 [2022-03-18 21:51:54,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963104162] [2022-03-18 21:51:54,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 21:51:54,271 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 21:51:54,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:51:54,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 21:51:54,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-03-18 21:51:54,272 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:51:54,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:51:54,829 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2022-03-18 21:51:54,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-18 21:51:54,830 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-18 21:51:54,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:51:54,830 INFO L225 Difference]: With dead ends: 77 [2022-03-18 21:51:54,830 INFO L226 Difference]: Without dead ends: 69 [2022-03-18 21:51:54,831 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=1817, Unknown=0, NotChecked=0, Total=2070 [2022-03-18 21:51:54,832 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 47 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 21:51:54,832 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 53 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 21:51:54,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-18 21:51:54,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2022-03-18 21:51:54,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.05) internal successors, (63), 60 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:51:54,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2022-03-18 21:51:54,842 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 35 [2022-03-18 21:51:54,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:51:54,843 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2022-03-18 21:51:54,843 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:51:54,843 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2022-03-18 21:51:54,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-18 21:51:54,845 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:51:54,845 INFO L500 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:51:54,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 21:51:55,049 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:51:55,050 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:51:55,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:51:55,050 INFO L85 PathProgramCache]: Analyzing trace with hash 794106220, now seen corresponding path program 4 times [2022-03-18 21:51:55,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:51:55,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218325351] [2022-03-18 21:51:55,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:51:55,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:51:55,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:51:55,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:51:55,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:51:55,246 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:51:55,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:51:55,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218325351] [2022-03-18 21:51:55,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218325351] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 21:51:55,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507717035] [2022-03-18 21:51:55,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 21:51:55,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:51:55,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 21:51:55,248 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) [2022-03-18 21:51:55,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 21:51:55,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 21:51:55,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 21:51:55,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-18 21:51:55,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 21:51:55,415 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:51:55,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 21:51:55,772 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:51:55,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507717035] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 21:51:55,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 21:51:55,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-03-18 21:51:55,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134491990] [2022-03-18 21:51:55,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 21:51:55,773 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-18 21:51:55,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:51:55,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-18 21:51:55,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2022-03-18 21:51:55,774 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:52:02,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:52:02,714 INFO L93 Difference]: Finished difference Result 103 states and 112 transitions. [2022-03-18 21:52:02,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-18 21:52:02,715 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-03-18 21:52:02,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:52:02,716 INFO L225 Difference]: With dead ends: 103 [2022-03-18 21:52:02,716 INFO L226 Difference]: Without dead ends: 98 [2022-03-18 21:52:02,717 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=985, Invalid=2555, Unknown=0, NotChecked=0, Total=3540 [2022-03-18 21:52:02,718 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 21:52:02,718 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 83 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 21:52:02,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-18 21:52:02,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-03-18 21:52:02,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 92 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:52:02,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2022-03-18 21:52:02,727 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 37 [2022-03-18 21:52:02,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:52:02,728 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2022-03-18 21:52:02,728 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:52:02,728 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2022-03-18 21:52:02,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-18 21:52:02,728 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:52:02,728 INFO L500 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:52:02,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 21:52:02,946 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:52:02,946 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:52:02,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:52:02,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1208240388, now seen corresponding path program 3 times [2022-03-18 21:52:02,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:52:02,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574110970] [2022-03-18 21:52:02,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:52:02,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:52:02,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:52:03,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:52:03,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:52:03,156 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:52:03,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:52:03,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574110970] [2022-03-18 21:52:03,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574110970] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 21:52:03,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620057176] [2022-03-18 21:52:03,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 21:52:03,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:52:03,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 21:52:03,172 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) [2022-03-18 21:52:03,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 21:52:03,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-03-18 21:52:03,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 21:52:03,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-18 21:52:03,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 21:52:03,447 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:52:03,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 21:52:04,202 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:52:04,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620057176] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 21:52:04,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 21:52:04,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 20] total 37 [2022-03-18 21:52:04,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907683941] [2022-03-18 21:52:04,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 21:52:04,203 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-18 21:52:04,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:52:04,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-18 21:52:04,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 21:52:04,204 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand has 37 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:52:31,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:52:31,478 INFO L93 Difference]: Finished difference Result 138 states and 155 transitions. [2022-03-18 21:52:31,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-18 21:52:31,479 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-03-18 21:52:31,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:52:31,480 INFO L225 Difference]: With dead ends: 138 [2022-03-18 21:52:31,480 INFO L226 Difference]: Without dead ends: 129 [2022-03-18 21:52:31,481 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=1222, Invalid=3890, Unknown=0, NotChecked=0, Total=5112 [2022-03-18 21:52:31,481 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 149 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-18 21:52:31,482 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 106 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-18 21:52:31,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-18 21:52:31,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-03-18 21:52:31,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0241935483870968) internal successors, (127), 124 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:52:31,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2022-03-18 21:52:31,493 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 39 [2022-03-18 21:52:31,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:52:31,493 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2022-03-18 21:52:31,493 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:52:31,493 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2022-03-18 21:52:31,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-18 21:52:31,494 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:52:31,494 INFO L500 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:52:31,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 21:52:31,698 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:52:31,699 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:52:31,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:52:31,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1642006708, now seen corresponding path program 5 times [2022-03-18 21:52:31,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:52:31,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614633838] [2022-03-18 21:52:31,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:52:31,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:52:31,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:52:32,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:52:32,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:52:32,229 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:52:32,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:52:32,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614633838] [2022-03-18 21:52:32,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614633838] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 21:52:32,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060036256] [2022-03-18 21:52:32,229 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 21:52:32,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:52:32,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 21:52:32,230 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) [2022-03-18 21:52:32,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 21:52:43,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2022-03-18 21:52:43,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 21:52:43,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-18 21:52:43,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 21:52:44,044 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:52:44,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 21:52:45,410 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:52:45,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060036256] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 21:52:45,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 21:52:45,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-03-18 21:52:45,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079165161] [2022-03-18 21:52:45,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 21:52:45,412 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-18 21:52:45,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:52:45,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-18 21:52:45,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1085, Invalid=2947, Unknown=0, NotChecked=0, Total=4032 [2022-03-18 21:52:45,413 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand has 64 states, 64 states have (on average 2.0) internal successors, (128), 63 states have internal predecessors, (128), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:55:51,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:55:51,079 INFO L93 Difference]: Finished difference Result 199 states and 216 transitions. [2022-03-18 21:55:51,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-18 21:55:51,079 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.0) internal successors, (128), 63 states have internal predecessors, (128), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-03-18 21:55:51,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:55:51,080 INFO L225 Difference]: With dead ends: 199 [2022-03-18 21:55:51,080 INFO L226 Difference]: Without dead ends: 194 [2022-03-18 21:55:51,083 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2088 ImplicationChecksByTransitivity, 185.7s TimeCoverageRelationStatistics Valid=4023, Invalid=11227, Unknown=2, NotChecked=0, Total=15252 [2022-03-18 21:55:51,083 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2503 mSolverCounterSat, 575 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 3078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 575 IncrementalHoareTripleChecker+Valid, 2503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-18 21:55:51,083 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 163 Invalid, 3078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [575 Valid, 2503 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-18 21:55:51,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-03-18 21:55:51,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2022-03-18 21:55:51,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.0159574468085106) internal successors, (191), 188 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:55:51,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 195 transitions. [2022-03-18 21:55:51,097 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 195 transitions. Word has length 69 [2022-03-18 21:55:51,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:55:51,098 INFO L478 AbstractCegarLoop]: Abstraction has 193 states and 195 transitions. [2022-03-18 21:55:51,098 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.0) internal successors, (128), 63 states have internal predecessors, (128), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:55:51,098 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 195 transitions. [2022-03-18 21:55:51,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-18 21:55:51,098 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:55:51,099 INFO L500 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:55:51,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 21:55:51,306 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,SelfDestructingSolverStorable11 [2022-03-18 21:55:51,306 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:55:51,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:55:51,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1425056564, now seen corresponding path program 4 times [2022-03-18 21:55:51,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:55:51,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731007486] [2022-03-18 21:55:51,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:55:51,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:55:51,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:55:51,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:55:51,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:55:51,824 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:55:51,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:55:51,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731007486] [2022-03-18 21:55:51,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731007486] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 21:55:51,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294826999] [2022-03-18 21:55:51,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 21:55:51,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:55:51,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 21:55:51,825 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) [2022-03-18 21:55:51,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 21:55:51,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 21:55:51,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 21:55:51,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-18 21:55:51,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 21:55:52,157 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:55:52,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 21:55:53,172 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:55:53,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294826999] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 21:55:53,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 21:55:53,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-03-18 21:55:53,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523123268] [2022-03-18 21:55:53,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 21:55:53,173 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-18 21:55:53,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:55:53,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-18 21:55:53,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1075, Invalid=3215, Unknown=0, NotChecked=0, Total=4290 [2022-03-18 21:55:53,174 INFO L87 Difference]: Start difference. First operand 193 states and 195 transitions. Second operand has 66 states, 66 states have (on average 2.0) internal successors, (132), 65 states have internal predecessors, (132), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:56:51,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:56:51,785 INFO L93 Difference]: Finished difference Result 238 states and 259 transitions. [2022-03-18 21:56:51,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-18 21:56:51,785 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0) internal successors, (132), 65 states have internal predecessors, (132), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-03-18 21:56:51,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:56:51,786 INFO L225 Difference]: With dead ends: 238 [2022-03-18 21:56:51,786 INFO L226 Difference]: Without dead ends: 233 [2022-03-18 21:56:51,789 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2686 ImplicationChecksByTransitivity, 58.6s TimeCoverageRelationStatistics Valid=4086, Invalid=12170, Unknown=0, NotChecked=0, Total=16256 [2022-03-18 21:56:51,790 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 1903 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 2523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 1903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-18 21:56:51,790 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 178 Invalid, 2523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [620 Valid, 1903 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-18 21:56:51,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-03-18 21:56:51,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2022-03-18 21:56:51,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.013157894736842) internal successors, (231), 228 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:56:51,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 235 transitions. [2022-03-18 21:56:51,829 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 235 transitions. Word has length 71 [2022-03-18 21:56:51,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:56:51,830 INFO L478 AbstractCegarLoop]: Abstraction has 233 states and 235 transitions. [2022-03-18 21:56:51,831 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0) internal successors, (132), 65 states have internal predecessors, (132), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:56:51,831 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 235 transitions. [2022-03-18 21:56:51,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-18 21:56:51,832 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:56:51,832 INFO L500 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:56:51,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-18 21:56:52,037 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,SelfDestructingSolverStorable12 [2022-03-18 21:56:52,038 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:56:52,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:56:52,038 INFO L85 PathProgramCache]: Analyzing trace with hash 843717136, now seen corresponding path program 5 times [2022-03-18 21:56:52,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:56:52,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820379097] [2022-03-18 21:56:52,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:56:52,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:56:52,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 21:56:52,076 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 21:56:52,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 21:56:52,129 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 21:56:52,129 INFO L614 BasicCegarLoop]: Counterexample is feasible [2022-03-18 21:56:52,130 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 21:56:52,131 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-18 21:56:52,133 INFO L718 BasicCegarLoop]: Path program histogram: [5, 5, 2, 1, 1] [2022-03-18 21:56:52,136 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 21:56:52,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 09:56:52 BasicIcfg [2022-03-18 21:56:52,191 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 21:56:52,191 INFO L158 Benchmark]: Toolchain (without parser) took 303625.91ms. Allocated memory was 189.8MB in the beginning and 228.6MB in the end (delta: 38.8MB). Free memory was 162.5MB in the beginning and 146.5MB in the end (delta: 16.0MB). Peak memory consumption was 55.0MB. Max. memory is 8.0GB. [2022-03-18 21:56:52,191 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 189.8MB. Free memory is still 150.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 21:56:52,191 INFO L158 Benchmark]: CACSL2BoogieTranslator took 220.52ms. Allocated memory is still 189.8MB. Free memory was 162.2MB in the beginning and 160.6MB in the end (delta: 1.6MB). Peak memory consumption was 9.6MB. Max. memory is 8.0GB. [2022-03-18 21:56:52,192 INFO L158 Benchmark]: Boogie Preprocessor took 27.33ms. Allocated memory is still 189.8MB. Free memory was 160.6MB in the beginning and 159.3MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 21:56:52,192 INFO L158 Benchmark]: RCFGBuilder took 230.51ms. Allocated memory is still 189.8MB. Free memory was 159.3MB in the beginning and 149.5MB in the end (delta: 9.7MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-18 21:56:52,192 INFO L158 Benchmark]: IcfgTransformer took 12.34ms. Allocated memory is still 189.8MB. Free memory was 149.5MB in the beginning and 148.5MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 21:56:52,193 INFO L158 Benchmark]: TraceAbstraction took 303129.41ms. Allocated memory was 189.8MB in the beginning and 228.6MB in the end (delta: 38.8MB). Free memory was 148.0MB in the beginning and 146.5MB in the end (delta: 1.6MB). Peak memory consumption was 41.2MB. Max. memory is 8.0GB. [2022-03-18 21:56:52,194 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 189.8MB. Free memory is still 150.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 220.52ms. Allocated memory is still 189.8MB. Free memory was 162.2MB in the beginning and 160.6MB in the end (delta: 1.6MB). Peak memory consumption was 9.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 27.33ms. Allocated memory is still 189.8MB. Free memory was 160.6MB in the beginning and 159.3MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 230.51ms. Allocated memory is still 189.8MB. Free memory was 159.3MB in the beginning and 149.5MB in the end (delta: 9.7MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 12.34ms. Allocated memory is still 189.8MB. Free memory was 149.5MB in the beginning and 148.5MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 303129.41ms. Allocated memory was 189.8MB in the beginning and 228.6MB in the end (delta: 38.8MB). Free memory was 148.0MB in the beginning and 146.5MB in the end (delta: 1.6MB). Peak memory consumption was 41.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] unsigned int x = 0; [L15] unsigned int y = __VERIFIER_nondet_uint(); [L17] COND TRUE x < 99 VAL [x=0, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=2, y=4294967295] [L17] COND TRUE x < 99 VAL [x=2, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=4, y=4294967295] [L17] COND TRUE x < 99 VAL [x=4, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=6, y=4294967295] [L17] COND TRUE x < 99 VAL [x=6, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=8, y=4294967295] [L17] COND TRUE x < 99 VAL [x=8, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=10, y=4294967295] [L17] COND TRUE x < 99 VAL [x=10, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=12, y=4294967295] [L17] COND TRUE x < 99 VAL [x=12, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=14, y=4294967295] [L17] COND TRUE x < 99 VAL [x=14, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=16, y=4294967295] [L17] COND TRUE x < 99 VAL [x=16, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=18, y=4294967295] [L17] COND TRUE x < 99 VAL [x=18, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=20, y=4294967295] [L17] COND TRUE x < 99 VAL [x=20, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=22, y=4294967295] [L17] COND TRUE x < 99 VAL [x=22, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=24, y=4294967295] [L17] COND TRUE x < 99 VAL [x=24, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=26, y=4294967295] [L17] COND TRUE x < 99 VAL [x=26, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=28, y=4294967295] [L17] COND TRUE x < 99 VAL [x=28, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=30, y=4294967295] [L17] COND TRUE x < 99 VAL [x=30, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=32, y=4294967295] [L17] COND TRUE x < 99 VAL [x=32, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=34, y=4294967295] [L17] COND TRUE x < 99 VAL [x=34, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=36, y=4294967295] [L17] COND TRUE x < 99 VAL [x=36, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=38, y=4294967295] [L17] COND TRUE x < 99 VAL [x=38, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=40, y=4294967295] [L17] COND TRUE x < 99 VAL [x=40, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=42, y=4294967295] [L17] COND TRUE x < 99 VAL [x=42, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=44, y=4294967295] [L17] COND TRUE x < 99 VAL [x=44, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=46, y=4294967295] [L17] COND TRUE x < 99 VAL [x=46, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=48, y=4294967295] [L17] COND TRUE x < 99 VAL [x=48, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=50, y=4294967295] [L17] COND TRUE x < 99 VAL [x=50, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=52, y=4294967295] [L17] COND TRUE x < 99 VAL [x=52, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=54, y=4294967295] [L17] COND TRUE x < 99 VAL [x=54, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=56, y=4294967295] [L17] COND TRUE x < 99 VAL [x=56, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=58, y=4294967295] [L17] COND TRUE x < 99 VAL [x=58, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=60, y=4294967295] [L17] COND TRUE x < 99 VAL [x=60, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=62, y=4294967295] [L17] COND TRUE x < 99 VAL [x=62, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=64, y=4294967295] [L17] COND TRUE x < 99 VAL [x=64, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=66, y=4294967295] [L17] COND TRUE x < 99 VAL [x=66, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=68, y=4294967295] [L17] COND TRUE x < 99 VAL [x=68, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=70, y=4294967295] [L17] COND TRUE x < 99 VAL [x=70, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=72, y=4294967295] [L17] COND TRUE x < 99 VAL [x=72, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=74, y=4294967295] [L17] COND TRUE x < 99 VAL [x=74, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=76, y=4294967295] [L17] COND TRUE x < 99 VAL [x=76, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=78, y=4294967295] [L17] COND TRUE x < 99 VAL [x=78, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=80, y=4294967295] [L17] COND TRUE x < 99 VAL [x=80, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=82, y=4294967295] [L17] COND TRUE x < 99 VAL [x=82, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=84, y=4294967295] [L17] COND TRUE x < 99 VAL [x=84, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=86, y=4294967295] [L17] COND TRUE x < 99 VAL [x=86, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=88, y=4294967295] [L17] COND TRUE x < 99 VAL [x=88, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=90, y=4294967295] [L17] COND TRUE x < 99 VAL [x=90, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=92, y=4294967295] [L17] COND TRUE x < 99 VAL [x=92, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=94, y=4294967295] [L17] COND TRUE x < 99 VAL [x=94, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=96, y=4294967295] [L17] COND TRUE x < 99 VAL [x=96, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=98, y=4294967295] [L17] COND TRUE x < 99 VAL [x=98, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=100, y=4294967295] [L17] COND FALSE !(x < 99) VAL [x=100, y=4294967295] [L25] CALL __VERIFIER_assert((x % 2) == (y % 2)) VAL [\old(cond)=0] [L7] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L8] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 303.0s, OverallIterations: 14, TraceHistogramMax: 50, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 280.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 549 SdHoareTripleChecker+Valid, 5.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 548 mSDsluCounter, 826 SdHoareTripleChecker+Invalid, 5.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 667 mSDsCounter, 1799 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6825 IncrementalHoareTripleChecker+Invalid, 8624 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1799 mSolverCounterUnsat, 159 mSDtfsCounter, 6825 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1075 GetRequests, 554 SyntacticMatches, 9 SemanticMatches, 512 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6658 ImplicationChecksByTransitivity, 279.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=233occurred in iteration=13, InterpolantAutomatonStates: 289, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 136 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 11.9s SatisfiabilityAnalysisTime, 7.4s InterpolantComputationTime, 841 NumberOfCodeBlocks, 841 NumberOfCodeBlocksAsserted, 82 NumberOfCheckSat, 1022 ConstructedInterpolants, 0 QuantifiedInterpolants, 5490 SizeOfPredicates, 10 NumberOfNonLiveVariables, 985 ConjunctsInSsa, 258 ConjunctsInUnsatCore, 31 InterpolantComputations, 4 PerfectInterpolantSequences, 262/7150 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-03-18 21:56:52,220 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...